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Cristiana Ferreira is an Assistant Professor in the Department of Civil Engineering at the Faculty of Engineering of the University of Porto. BSc in Civil Engineering (2000) and MSc in Soil Mechanics and Geotechnical Engineering (2003) from UPorto. Her PhD in Civil Engineering (2009), developed at the Universities of Porto and Bristol, was entitled "The use of seismic wave velocities in the measurement of stiffness of a residual soil", having been awarded the title of "European Doctorate". Cristiana is an integrated member of CONSTRUCT (Institute of R&D in Structures and Construction) and has been involved as a research team member in 1 H2020 European and 8 national FCT research projects, two of which were funded as principal investigator. She has supervised or co-advised 1 concluded and 4 going PhD theses and 27 concluded MSc dissertations. Cristiana has received 3 awards and 1 honours award from two Portuguese engineering societies. She has 3 published books as editor, 36 papers in national and international scientific peer-reviewed journals and 55 papers in proceedings of international and national conferences. She is also a peer-reviewer for 15 international and 1 national scientific journals. She has also been on the organizing committees of 11 international and national scientific conferences and workshops. Her research is mainly focused on soil characterisation, seismic wave-based non-destructive testing, centrifuge testing, geophysical and geotechnical site characterisation; seismic and static liquefaction; liquefaction mitigation; mechanics of non-textbook geomaterials (residual soils, mine tailings; cemented geomaterials).
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Identification

Personal identification

Full name
Cristiana Ferreira

Citation names

  • Ferreira, Cristiana
  • Ferreira, C.
  • Ferreira, Cristiana Maria Fonseca

Author identifiers

Ciência ID
EA19-7AFC-E118
ORCID iD
0000-0001-5998-6220
Google Scholar ID
iszLFx0AAAAJ
Researcher Id
L-5209-2018

Telephones

Telephone
  • (351) 225081400 Ext.: 1752 (Professional)
  • 225081752 (Professional)

Addresses

  • Universidade do Porto, Faculdade de Engenharia, CONSTRUCT. Rua Roberto Frias, s/n, 4200-465, Porto, Porto, Portugal (Professional)

Websites

Knowledge fields

  • Engineering and Technology - Civil Engineering - Civil Engineering
  • Engineering and Technology - Environmental Engineering - Geotechnics

Languages

Language Speaking Reading Writing Listening Peer-review
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
French Intermediate (B1) Intermediate (B1) Intermediate (B1) Intermediate (B1) Elementary (A2)
Spanish; Castilian Intermediate (B1) Advanced (C1) Intermediate (B1) Advanced (C1) Intermediate (B1)
Education
Degree Classification
2003/02/01 - 2009/07/02
Concluded
 PhD in Civil Engineering (Doutoramento)
Universidade do Porto Faculdade de Engenharia, Portugal

University of Bristol Department of Civil Engineering, United Kingdom
"The Use of Seismic Wave Velocities in the Measurement of Stiffness of a Residual Soil" (THESIS/DISSERTATION)
 Aprovado por unanimidade
2003
Concluded
 MSc in Soil Mechanics and Geotechnical Engineering- MMSEG (Mestrado)
Universidade do Porto Faculdade de Engenharia, Portugal
"Implementation and application of piezoelectric transducers in the determination of seismic wave velocities in soils. Assessment of sampling quality in residual soils (in Portuguese)" (THESIS/DISSERTATION)
 MUITO BOM
2000
Concluded
 Graduation in Civil Engineering (Licenciatura)
Universidade do Porto Faculdade de Engenharia, Portugal
 15 valores
Affiliation

Teaching in Higher Education

Category
Host institution 		Employer
2022/11/17 - Current Assistant Professor (University Teacher) Universidade do Porto Faculdade de Engenharia, Portugal
Projects

Contract

Designation Funders
2019/09/16 - 2025/09/15 AWESOME: Advanced WavE-based characterization of SOil damping. Application to the assessment and Mitigation of Earthquake-induced damage
CEECINST/00049/2018/CP1524/CT0001
Post-doc Fellow
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Ongoing
2022/01/01 - 2023/12/31 InaWAVE: Innovative approach to wave-based experimental determination of soil damping
EXPL/ECI-EGC/1420/2021
Universidade do Porto Faculdade de Engenharia, Portugal

Universidade do Porto Instituto de I e D em Estruturas e Construção, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2019/01/01 - 2019/12/31 Instituto de I&D em Estruturas e Construções
UID/ECI/04708/2019
Universidade do Porto Instituto de I e D em Estruturas e Construção, Portugal

Universidade do Porto Faculdade de Engenharia, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2016/05/01 - 2019/11/30 LIQ2PROEARTH. Liquefaction assessment protocols to protect critical infrastructures against earthquake damage
PTDC/ECM-GEO/1780/2014
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2016/06/01 - 2019/10/31 LIQUEFACT: Assessment and mitigation of liquefaction potential across Europe: a holistic approach to protect structures/ infrastructure for improved resilience to earthquake-induced liquefaction disasters
H2020 GA 700748
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
Concluded
2017/07/01 - 2019/09/15 Tools for risk assessment and mitigation of earthquake-induced liquefaction, based on advanced geotechnical and geophysical site characterisation
SFRH/BPD/120470/2016
 Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2013/12/31 Strategic Project - UI 733 - 2011-2012
PEst-OE/ECI/UI0733/2011
Universidade do Porto Departamento de Engenharia Civil, Portugal

Universidade do Porto Faculdade de Engenharia, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
2011/01/01 - 2013/12/31 Projecto Estratégico - UI 733 - 2011-2012
PEst-OE/ECI/UI0733/2011
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2010/06/01 - 2013/11/30 PTDC/ECM/103220/2008: Ferramentas para dimensionamento baseado no desempenho em maciços susceptíveis à liquefacção
PTDC/ECM/103220/2008
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2010/06/01 - 2013/10/31 PTDC/ECM/099475/2008: Caracterização e modelação de comportamento dinâmico e cíclico de misturas de solo-cimento para infraestruturas de transportes
PTDC/ECM/099475/2008
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2012/04/01 - 2013/03/31 WaveSoil - Ferramentas inovadoras baseadas em ondas sísmicas para a caracterização do amortecimento e anisotropia de solos em ensaios correntes
PTDC/ECM/122751/2010
Principal investigator
Universidade do Minho, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2008/01/01 - 2010/12/31 PTDC/ECM/70505/2006: Estacas de Grande Diâmetro sob Acções Verticais
PTDC/ECM/70505/2006
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2005/07/01 - 2008/08/29 POCI/ECM/55589/2004: Propriedades Dinâmicas de Solos Residuais de Granito: efeitos da velocidade de carregamento, frequência e tempo
POCI/ECM/55589/2004
Researcher
Universidade do Porto Faculdade de Engenharia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2003/02/01 - 2007/01/31 VELOCIDADES DE ONDAS SÍSMICAS PARA O RECONHECIMENTO DOS PARÂMETROS DE ESTADO E PROPRIEDADES DINÂMICAS E ESTÁTICAS DE SOLOS RESIDUAIS
SFRH/BD/11363/2002
University of Bristol, United Kingdom

Universidade do Porto, Portugal
Fundação para a Ciência e a Tecnologia
Concluded
Outputs

Publications

Book
  1. Viana da Fonseca, A.; Ferreira, C.. Técnicas de Amostragem em Solos e Rochas Brandas e Controlo de Qualidade. 1. ed. Porto: IC-FEUP, 2004. v. 1. 440 p.. Porto: IC-FEUP. 2004.
    Published
Book chapter
  1. Shahgholian, Rashid; Ferreira, Cristiana; Viana da Fonseca, A.. "Correlation between SPT and CPT tests in liquefiable deposits". In Cone Penetration Testing 2022, 683-689. CRC Press, 2022.
    Published • 10.1201/9781003308829-100
  2. Fausto Molina-Gómez; Cordeiro, Diana; Ferreira, Cristiana; Viana da Fonseca, A.. "Soil stratigraphy from seismic piezocone data and multivariate clustering in alluvial soil deposits: Experience in the Lower Tagus Valley region". In Cone Penetration Testing 2022, 584-590. CRC Press, 2022.
    Published • 10.1201/9781003308829-84
  3. Arroyo, Marcos; Ferreira, Cristiana; Sukolrat, J.. "Dynamic measurements and porosity in saturated triaxial specimens". In Soil Stress-Strain Behavior: Measurement, Modeling and Analysis. 2007.
    Published
  4. Ferreira, C.; Viana da Fonseca, A.; Santos, Jaime. "Comparison of simultaneous bender elements and resonant column tests on porto residual soil". In Soil Stress-Strain Behavior: Measurement, Modeling and Analysis, 523-536. Springer Netherlands, 2007.
    Published
Conference abstract
  1. Fazeres-Ferradosa, T.; Lino Gonçalves; Miranda, Filipe; Ferreira, Cristiana Maria Fonseca; Taveira-Pinto, Francisco. Corresponding author: Fazeres-Ferradosa, T.. "Experimental study on scour around underwater pipelines". Paper presented in Doctoral Congress in Engineering, Porto, 2023.
    Accepted
Conference paper
  1. Fausto Molina-Gómez; António Joaquim Pereira Viana da Fonseca; Ferreira, Cristiana; Bernardo Caicedo. Corresponding author: Fausto Molina-Gómez. "Liquefaction and undrained cyclic behaviour in fully and partially saturated sands.". Paper presented in Geotechnics for Sustainable Infrastructure Development - Geotec Hanoi, Hanoi, 2023.
    Published
  2. Fausto Molina-Gómez; Viana da Fonseca, A.; Ferreira, Cristiana; Camacho-Tauta, Javier. "Small-strain stiffness of liquefiable sands: a comparison between bender elements and resonant-column tests". Paper presented in IS-Porto 2023: 8th International Symposium on Deformation Characteristics of Geomaterials, Porto, 2023.
    Published
  3. Fausto Molina-Gómez; Viana da Fonseca, A.; Ferreira, Cristiana; Catarina Ramos; Cordeiro, Diana. "Novel sampling techniques for collecting high-quality samples: Portuguese experience in liquefiable soils". Paper presented in 6th International Conference on Geotechnical and Geophysical Site Characterization, Budapest, 2021.
    Published
  4. Viana da Fonseca, A.; Fausto Molina-Gómez; Ferreira, Cristiana; Cordeiro, Diana. "An integrated interpretation of SCPTu for liquefaction assessment in intermediate alluvial deposits in Portugal". Paper presented in 6th International Conference on Geotechnical and Geophysical Site Characterization, Budapest, 2021.
    Published
  5. Cordeiro, Diana; Viana da Fonseca, A.; Ferreira, Cristiana; Fausto Molina-Gómez. "LIQUEFACTION ASSESSMENT TROUGH SCPTU AND DMT TESTS: AVEIRO CASE STUDY". Paper presented in 6th International Conference on Geotechnical and Geophysical Site Characterization, Budapest, 2021.
    Published
  6. Catarina Ramos; Ferreira, Cristiana; Fausto Molina-Gómez; Viana da Fonseca, A.. "Enhanced liquefaction susceptibility evaluation of Lisbon sands from SPT and CPTu tests: integration of laboratory-measured fines content". Paper presented in 6th International Conference on Geotechnical and Geophysical Site Characterization, Budapest, 2021.
    Published
  7. Ramos, C.; Ferreira, C.; Molina-Gómez, F.; Viana da Fonseca, A.. "Critical state lines of Portuguese liquefiable sands". 2019.
    10.1051/e3sconf/20199206003
  8. Millen, M.; Ferreira, C.; Gerace, A.; Viana da Fonseca, A.. "Simplified equivalent soil profiles based on liquefaction performance for shallow-founded structures". 2019.
  9. Ferreira, C.; Viana da Fonseca, A.; Díaz-Durán, F.; Cascante, G.. "New developments in bender element testing". 2019.
  10. Da Fonseca, A.V.; Ferreira, C.; Molina-Gómez, F.; Ramos, C.. "Collection of high-quality samples in liquefiable soils using new sampling techniques". 2019.
    10.32075/17ECSMGE-2019-0014
  11. Fausto Molina-Gómez; Catarina Ramos; Viana da Fonseca, António; Ferreira, Cristiana; Javier Camacho-Tauta. "Cyclic liquefaction assessment by the criterion of shear wave velocity in high-quality undisturbed samples". Paper presented in XVI Congreso Colombiano de Geotecnia & IV Seminario Internacional de Ingeniería Sismo-Geotécnica, Paipa, 2018.
    Published
  12. Ferreira, Cristiana. "Numerical simulations of the dynamic soil behaviour in true triaxial conditions". Paper presented in 9th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2018), porto, 2018.
    Published
  13. Ferreira, Cristiana; Viana da Fonseca, A.; Saldanha, Ana Sofia; Ramos, Catarina; Amoroso, Sara; Minarelli, Luca. "Estimated Versus Measured Vs Profiles And Vs30 From Geotechnical And Geophysical Tests At A Pilot Site In The Lower Tagus Valley". Paper presented in 16ECEE: 16th European Conference on Earthquake Engineering, Thessaloniki, 2018.
    Published
  14. Viana da Fonseca, A.; Ferreira, C.; Saldanha, A.S.; Ramos, C.; Rodrigues, C.. "Comparative analysis of liquefaction susceptibility assessment by CPTu and SPT tests". 2018.
  15. Rios, Sara; Ferreira, Cristiana; Viana da Fonseca, A.. "Melhoramento de um solo arenoso por ativação alcalina para mitigação da liquefação". Paper presented in 16º Congresso Nacional de Geotecnia, Ponta Delgada, 2018.
    Published
  16. António Topa Gomes; MIRANDA, TIAGO; Ferreira, Cristiana; Sousa, Luis Ribeiro. "Geomechanical characterization of volcanic rocks in mountainous islands". Paper presented in NATURAL HAZARDS - NatHaz16, Ponta Delgada (Azores), 2016.
    Published
  17. Pereira, C.; Granja, J.; Gomes Correia, A.; Ferreira, C.; Azenha, M.; Nazarian, S.. "Combined bender elements and accelerometers system: Measurement and interpretation". 2016.
  18. Pereira, C.; Correia, A.G.; Ferreira, C.; Araújo, N.. "The importance of coupling and sample geometry in bender element testing". 2015.
  19. Santos, J.A.; Santos, J.N.; Ferreira, C.; Pereira, C.. "Assessment of shear modulus by different seismic wave-based techniques". Paper presented in 6th International Symposium on deformation characteristics of Geomaterials, 2015.
  20. Pereira, C.; Gomes Correia, A.; Ferreira, C.; Santos, J.A.; Santos, J.N.. "Measurement of shear modulus using bender elements and resonant-column". Paper presented in XV Panamerican Conference on Soil Mechanics and Geotechnical Engineering, 2015.
  21. Jacinto Silva; Miguel Azenha; António Gomes Correia; Ferreira, Cristiana. "Monitorização contínua da rigidez de areia estabilizada com cimento através da frequência de ressonância". Paper presented in 13º Congresso Nacional de Geotecnia, Lisboa, 2012.
    Published
  22. Ferreira, Cristiana; João Paulo Martins; António Gomes Correia. "Determination of the small-strain stiffness of hard soils by means of bender elements and accelerometers". Paper presented in XV European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE 2011), 12-15 September 2011, Athens, Greece, Atenas, 2011.
    Published
  23. De Mio, G.; Heraldo Giacheti; António Viana da Fonseca; Ferreira, Cristiana. "CPTU data interpretation for stratigraphic logging: differences between sedimentary and residual soils". Paper presented in CPT'10 - 2nd International Symposium on Cone Penetration Testing, Huntington Beach, California, 2010.
    Published
  24. Ferreira, Cristiana; António Gomes Correia; João Paulo Martins. "Implementação de bender-extender elements e acelerómetros numa câmara triaxial stress-path". Paper presented in 12º Congresso Nacional de Geotecnia, Guimarães, 2010.
    Published
  25. Ferreira, Cristiana; António Viana da Fonseca. "Caracterização do comportamento de um solo residual de granito através de ensaios triaxiais verdadeiros". Paper presented in 12º Congresso Nacional de Geotecnia, Guimarães, 2010.
    Published
  26. Araújo, Nuno Miguel Faria; Miranda, Tiago F. S.; Sena-Cruz, José; Ferreira, Cristiana; Correia, A. Gomes. "Previsão geotécnica do comportamento mecânico de uma fundação superficial em modelo físico". 2010.
  27. Carlos, Karina Gonçalves; Sena-Cruz, José; Barros, Joaquim A. O.; Miranda, Tiago F. S.; Ferreira, Cristiana; Azenha, Miguel. "Sistemas de solo compósito-betão : caracterização da interface geocompósito-solo". 2010.
  28. Ferreira, Cristiana. "Bender element tests on reconstituted and undisturbed specimens of a residual soil under true triaxial conditions". Paper presented in 4iYGEC'09 – 4th International Young Geotechnical Engineers Conference, Alexandria, 2009.
    Published
  29. Cristiana Maria da Fonseca Ferreira; António Viana da Fonseca; Martin Fahey. "Seismic wave measurements in true triaxial tests on residual soil from granite". Paper presented in IS Atlanta'08, Atlanta, 2008.
    Published
  30. Javier Camacho-Tauta; Cristiana Maria da Fonseca Ferreira; Jaime Santos; António Viana da Fonseca. "Moving Windows Algorithm to Reduce Uncertaintities in Bender Element Testing". Paper presented in 11º Congresso Nacional de Geotecnia, Coimbra, 2008.
    Published
  31. Carlos Costa; Cristiana Maria da Fonseca Ferreira; António Viana da Fonseca; Joaquim Mendes. "Ensaios Triaxiais Verdadeiros em Provetes de Solo Residual de Granito do Porto: Concepção e Implementação do Sistema de Aquisição e Controlo Automático". Paper presented in 11º Congresso Nacional de Geotecnia, Coimbra, 2008.
    Published
  32. Ferreira, C.; Viana da Fonseca, A.; Fahey, M.. "Seismic wave measurements in true triaxial tests on natural and reconstituted samples of residual soil from granite". Paper presented in 4th International Symposium (IS-Atlanta 2008), Atlanta, 2008.
    Published
  33. Jaime Santos; Javier Camacho-Tauta; Michela Parodi; António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira. "Use of random vibrations to measure stiffness of soils". Paper presented in EVACES'07: International Conference on Experimental vibration analysis for civil engineering structures, Porto, 2007.
    Published
  34. Cristiana Maria da Fonseca Ferreira; António Viana da Fonseca; Jaime Santos; Marcos Arroyo; Jiraroth Sukolrat. "Comparison of simultaneous bender elements and resonant column tests on Porto residual soil". Paper presented in Geotechnical Symposium in Rome, Roma, 2006.
    Published
  35. António Viana da Fonseca; Elisabete Costa; Cristiana Maria da Fonseca Ferreira. "Aplicabilidade de Formulações Convencionais na Classificação de Solos Residuais do Granito do Porto com Base em Ensaios CPT(U), SPT e DMT e Novas Tendências". Paper presented in 10º Congresso Nacional de Geotecnia, Lisboa, 2006.
    Published
  36. Viana da Fonseca, A.; Ferreira, C.; Santos, J. A.. "Comparison of simultaneous bender elements and resonant-column tests on Porto residual soil and Toyoura sand. In: Geotechnical Symposium to Celebrate Prof. Tatsuoka s 60th Birthday, 2006, La Sapienza. Celebrate Prof. Tatsuoka s 60th Birthday, 2006. p. 523-535.". Paper presented in Geotechnical Symposium to Celebrate Prof. Tatsuoka s 60th Birthday, La Sapienza, 2006.
    Published
  37. António Viana da Fonseca; Jorge Carvalho; Cristiana Maria da Fonseca Ferreira; Jaime Santos; Fernando Almeida; Helder Hermosilha; Viana Da Fonseca, A.; et al. "Combining geophysical and mechanical testing techniques for the investigation and characterization of ISC’2 residual soil profile". Paper presented in 16th International Conference on Soil Mechanics and Geotechnical Engineering, Osaka, 2005.
    Published
  38. Mostafa Ismail; Cristiana Maria da Fonseca Ferreira; Martin Fahey. "Influence of Cement Type on Gmax of a Carbonate Sand". Paper presented in A. W. Skempton Memorial Conference, London, 2004.
    Published
  39. António Viana da Fonseca; Jorge Carvalho; Cristiana Maria da Fonseca Ferreira; Elisabete Costa; Catarina Tuna; Jaime Santos. "Geotechnical characterization of a residual soil profile: the ISC’2 experimental site, FEUP". Paper presented in ISC'2 - 2nd International Site Characterization Conference, Porto, 2004.
    Published
  40. António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira; Jorge Carvalho. "Tentative evaluation of K0 from shear waves velocities determined in Down-Hole (Vs vh) and Cross-Hole (Vs hv) tests on a residual soil". Paper presented in ISC'2 - 2nd International Site Characterization Conference, Porto, 2004.
    Published
  41. Cristiana Maria da Fonseca Ferreira; António Ananias de Mendonça; António Viana da Fonseca. "Avaliação da Qualidade de Amostragem em Campos Experimentais de Solos Residuais de Granito do Porto". Paper presented in 9º Congresso Nacional de Geotecnia – 2º Congresso Luso-Brasileiro de Geotecnia, Aveiro, 2004.
    Published
  42. Ismail, M.; Ferreira, C.; Fahey, M.. "Influence of Cement Type on Go of a Carbonate Sand". 2004.
  43. Viana da Fonseca, A.; Carvalho, J.; Ferreira, C.; Tuna, C.; Costa Santos, E.; Santos, J.A.. "Geotechnical characterization of a residual soil profile: the experimental site of the University of Porto". Paper presented in Geotechnical & Geophysical Site Characterization - ISC'2, 2004.
  44. António Viana da Fonseca; José Fernando Vieira de Sousa; Cristiana Maria da Fonseca Ferreira. "Deriving Stiffness Parameters from “Simple” in Situ Tests and Relating them with Reference Values on Saprolitic Soils from Granite.". Paper presented in 12th Panamerican Conference on Soil Mechanics and Geotechnical Engineering – SoilRock America 2003, Cambridge, Massachusetts, 2003.
    Published
  45. Paul D. Greening; David F. T. Nash; Nadia Benahmed; Cristiana Maria da Fonseca Ferreira; António Viana da Fonseca. "Comparison Of Shear Wave Velocity Measurements In Different Materials Using Time And Frequency Domain Techniques". Paper presented in 3rd International Symposium on Deformation Characteristics of Geomaterials, IS-Lyon’03, Lyon, 2003.
    Published
  46. Viana da Fonseca, A.; Sousa Vieira, J. F.; Ferreira, C.. "Deriving stiffness parameters from simple in situ tests and relating tehm with reference values on saprolitic soils from granite". Paper presented in 12th Panamerican Conference on Soil Mechanics and Geotechnical Engineering, Cambridge, 2003.
    Published
  47. António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira. "Aplicação da técnica de bender elements para avaliação da qualidade de amostragem em solos residuais". Paper presented in XII COBRAMSEG, São Paulo, 2002.
    Published
  48. António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira. "Bender elements como técnicas laboratoriais excelentes para avaliação de parâmetros geotécnicos referenciais". Paper presented in 8º Congresso Nacional de Geotecnia, Lisboa, 2002.
    Published
  49. António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira. "Gestão da qualidade de amostragem em solos residuais e em solos argilosos moles, por análise comparativa de velocidades de ondas sísmicas in situ e em laboratório". Paper presented in Workshop sobre Técnicas de Amostragem em Solos e Rochas Brandas e Controlo de Qualidade, Porto, 2001.
    Published
Edited book
  1. António Gomes Correia; Tiago Miranda; Francisco Martins; Ferreira, Cristiana; Joaquim Tinoco; Carlos Alves; Jorge Almeida e Sousa; António José Roque. Geotecnia e Desenvolvimento Sustentável. Actas do 12º Congresso Nacional de Geotecnia. Coimbra, Portugal: Almedina. 2010.
  2. António Viana da Fonseca; Ferreira, Cristiana. Técnicas de Amostragem em Solos e Rochas Brandas e Controlo de Qualidade. Porto, Portugal: FEUP. 2004.
Journal article
  1. Soares, Marisa; Viana da Fonseca, António; Ferreira, Cristiana; Rios, Sara. "Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading". Applied Sciences 13 15 (2023): 8580. http://dx.doi.org/10.3390/app13158580.
    10.3390/app13158580
  2. Fausto Molina-Gómez; António Viana da Fonseca; Cristiana Ferreira; Bernardo Caicedo. "Improvement of cyclic liquefaction resistance induced by partial saturation: An interpretation using wave-based approaches". Soil Dynamics and Earthquake Engineering (2023): https://doi.org/10.1016/j.soildyn.2023.107819.
    10.1016/j.soildyn.2023.107819
  3. A. Colaço; P. Alves Costa; C. Ferreira; C. Parente; A. Silva Cardoso. "Prediction of ground-borne vibrations induced by impact pile driving: experimental validation of an equivalent linear approach". Canadian Geotechnical Journal (2023): https://doi.org/10.1139/cgj-2021-0684.
    10.1139/cgj-2021-0684
  4. António Viana da Fonseca; Fausto Molina-Gómez; Cristiana Ferreira. "Liquefaction resistance of TP-Lisbon sand: a critical state interpretation using in situ and laboratory testing". Bulletin of Earthquake Engineering (2023): https://doi.org/10.1007/s10518-022-01577-8.
    10.1007/s10518-022-01577-8
  5. Molina-Gómez, F.; da Fonseca, A.V.; Ferreira, C.; Caicedo, B.. "Experimental Wave-Based Assessment of Liquefaction Resistance for Different Degrees of Saturation". Geotechnical Testing Journal 46 6 (2023): 1-18. http://www.scopus.com/inward/record.url?eid=2-s2.0-85175488218&partnerID=MN8TOARS.
    10.1520/GTJ20230299
  6. da Fonseca, A.V.; Molina-Gómez, F.; Ferreira, C.; Quintero, J.. "Modelling the critical state behaviour of granular soils: Application of NorSand constitutive law to TP-Lisbon sand". Geomechanics and Engineering 34 3 (2023): 317-328. http://www.scopus.com/inward/record.url?eid=2-s2.0-85175325271&partnerID=MN8TOARS.
    10.12989/gae.2023.34.3.317
  7. António Viana da Fonseca; Diana Cordeiro; Fausto Molina-Gómez; Davide Besenzon; António Fonseca; Cristiana Ferreira. "The mechanics of iron tailings from laboratory tests on reconstituted samples collected in post-mortem Dam I in Brumadinho". Soils and Rocks 45 2 (2022): 1-20. https://doi.org/10.28927/SR.2022.001122.
    10.28927/SR.2022.001122
  8. Diana Cordeiro; Fausto Molina-Gómez; Cristiana Ferreira; Sara Rios; António Viana da Fonseca. "Cyclic Liquefaction Resistance of an Alluvial Natural Sand: A Comparison between Fully and Partially Saturated Conditions". Geotechnics (2022): https://doi.org/10.3390/geotechnics2010001.
    10.3390/geotechnics2010001
  9. Catarina Ramos; Fausto Molina-Gómez; Cristiana Ferreira; António Viana da Fonseca. "Qualidade de amostras “indeformadas” em solos não coesivos recolhidas com procedimentos avançados". Geotecnia (2021): https://doi.org/10.14195/2184-8394_153_3.
    10.14195/2184-8394_153_3
  10. Catarina Ramos; António Fonseca; Cristiana Ferreira. "CPTu-based approaches for cyclic liquefaction assessment of alluvial soil profiles". Soils and Rocks (2021): https://doi.org/10.28927/SR.2021.070121.
    10.28927/SR.2021.070121
  11. Ferreira, C.; Rios, S.; Cristelo, N.; Viana Da Fonseca, A.. "Evolution of the optimum ultrasonic testing frequency of alkali-activated soil-ash". Geotechnique Letters 11 3 (2021): 158-163. http://www.scopus.com/inward/record.url?eid=2-s2.0-85116431912&partnerID=MN8TOARS.
    10.1680/jgele.21.00041
  12. Molina-Gómez, F.; Viana da Fonseca, A.; Ferreira, C.; Sousa, F.; Bulla-Cruz, L.A.. "Defining the soil stratigraphy from seismic piezocone data: A clustering approach". Engineering Geology 287 (2021): http://www.scopus.com/inward/record.url?eid=2-s2.0-85105001565&partnerID=MN8TOARS.
    10.1016/j.enggeo.2021.106111
  13. Ferreira, Cristiana; Diaz-Duran, Fredy; da Fonseca, Antonio Viana; Cascante, Giovanni. "New Approach to Concurrent V-s and V-p Measurements Using Bender Elements". Geotechnical Testing Journal (2021): https://publons.com/publon/49929790/.
    10.1520/GTJ20200207
  14. Ferreira, C.; Rios, S.; Cristelo, N.; da Fonseca, A. Viana. "Evolution of the optimum ultrasonic testing frequency of alkali-activated soil-ash". Geotechnique Letters (2021): https://publons.com/publon/49929784/.
    10.1680/JGELE.21.00041
  15. Molina-Gomez, Fausto; da Fonseca, Antonio Viana; Ferreira, Cristiana; Sousa, Fernanda; Alexander Bulla-Cruz, Lenin. "Defining the soil stratigraphy from seismic piezocone data: A clustering approach". Engineering Geology (2021): https://publons.com/publon/47151452/.
    10.1016/J.ENGGEO.2021.106111
  16. Molina-Gómez, F.; Ferreira, C.; Ramos, C.; Viana da Fonseca, A.. "Performance of Gel-Push sampling in liquefiable soils". Géotechnique Letters 10 2 (2020): 1-20. http://dx.doi.org/10.1680/jgele.19.00073.
    10.1680/jgele.19.00073
  17. Molina-Gómez, Fausto; Viana da Fonseca, António; Ferreira, Cristiana; Camacho-Tauta, Javier. "Dynamic properties of two historically liquefiable sands in the Lisbon area". Soil Dynamics and Earthquake Engineering 132 (2020): 106101. http://dx.doi.org/10.1016/j.soildyn.2020.106101.
    10.1016/j.soildyn.2020.106101
  18. Cristiana Ferreira; António Viana da Fonseca; Catarina Ramos; Ana Sofia Saldanha; Sara Amoroso; Carlos Rodrigues. "Comparative analysis of liquefaction susceptibility assessment methods based on the investigation on a pilot site in the greater Lisbon area". Bulletin of Earthquake Engineering 18 1 (2020): 109-138. https://doi.org/10.1007/s10518-019-00721-1.
    10.1007/s10518-019-00721-1
  19. Millen, M.; Viana da Fonseca, A.; Quintero, J.; Ferreira, C.; Oztoprak, S.; Oser, C.; Bozbey, I.; et al. "Site classification using equivalent soil profiles for building-liquefaction interaction". Bulletin of Earthquake Engineering (2020): http://www.scopus.com/inward/record.url?eid=2-s2.0-85095698243&partnerID=MN8TOARS.
    10.1007/s10518-020-00967-0
  20. Lai, C.G.; Bozzoni, F.; Conca, D.; Famà, A.; Özcebe, A.G.; Zuccolo, E.; Meisina, C.; et al. "Technical guidelines for the assessment of earthquake induced liquefaction hazard at urban scale". Bulletin of Earthquake Engineering (2020): http://www.scopus.com/inward/record.url?eid=2-s2.0-85090997962&partnerID=MN8TOARS.
    10.1007/s10518-020-00951-8
  21. Viana da Fonseca, António; Ferreira, Cristiana; Ramos, Catarina; Molina-Gómez, Fausto. "The geotechnical test site in the greater Lisbon area for liquefaction characterisation and sample quality control of cohesionless soils". AIMS Geosciences 5 2 (2019): 325-343. http://dx.doi.org/10.3934/geosci.2019.2.325.
    10.3934/geosci.2019.2.325
  22. Millen, M.; Ferreira, C.; Gerace, A.; Viana da Fonseca, A.. "Simplified equivalent soil profiles based on liquefaction performance for shallow-founded structures". Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions (2019): https://publons.com/publon/49929749/.
  23. Ferreira, C.; da Fonseca, A. Viana; Diaz-Duran, F.; Cascante, G.. "New developments in bender element testing". Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions (2019): https://publons.com/publon/49929748/.
  24. Saldanha, Ana Sofia; Viana da Fonseca, António; Ferreira, Cristiana. "Microzonation of the liquefaction susceptibility: case study in the lower Tagus valley". Geotecnia 142 (2018): 07-34. http://dx.doi.org/10.24849/j.geot.2018.142.01.
    10.24849/j.geot.2018.142.01
  25. Miranda, T.; Sousa, L.R.; Gomes, A.T.; Tinoco, J.; Ferreira, C.. "Geomechanical characterization of volcanic rocks using empirical systems and data mining techniques". Journal of Rock Mechanics and Geotechnical Engineering 10 1 (2018): 138-150. http://www.scopus.com/inward/record.url?eid=2-s2.0-85041523864&partnerID=MN8TOARS.
    10.1016/j.jrmge.2017.11.003
  26. Viana da Fonseca, A.; Ferreira, C.; Saldanha, A. S.; Ramos, C.; Rodrigues, C.. "Comparative analysis of liquefaction susceptibility assessment by CPTu and SPT tests". Cone Penetration Testing (2018): https://publons.com/publon/49929750/.
  27. Rios, S.; Cristelo, N.; da Fonseca, A.V.; Ferreira, C.. "Stiffness behavior of soil stabilized with alkali-activated fly ash from small to large strains". International Journal of Geomechanics 17 3 (2017): http://www.scopus.com/inward/record.url?eid=2-s2.0-85012986064&partnerID=MN8TOARS.
    10.1061/(ASCE)GM.1943-5622.0000783
  28. Rios, Sara; Cristelo, Nuno; Viana da Fonseca, António; Ferreira, Cristiana. "Structural Performance of Alkali-Activated Soil Ash versus Soil Cement". Journal of Materials in Civil Engineering 28 2 (2016): 04015125-04015125.
    Published • 10.1061/(ASCE)MT.1943-5533.0001398
  29. Pereira, Cláudio; António Gomes Correia; Ferreira, Cristiana; Araújo, Nuno. "Determinação da rigidez de uma areia com recurso a bender elements e acelerómetros: princípio de medição e aplicações". Mecânica Experimental 24 (2015): 41-48. http://www-ext.lnec.pt/APAET/pdf/Rev_24_A5.pdf.
    Open access • Published
  30. Pereira, Claudio; Gomes Correia, Antonio; Ferreira, Cristiana; Santos, Jaime; Santos, Joao. "Measurement of shear modulus using bender elements and resonant-column". From Fundamentals to Applications in Geotechnics (2015): https://publons.com/publon/11546921/.
    10.3233/978-1-61499-603-3-120
  31. Santos, Jaime; Santos, Joao; Ferreira, Cristiana; Pereira, Claudio; Gomes Correia, Antonio. "Assessment of shear modulus by different seismic wave-based techniques". Deformation Characteristics of Geomaterials (2015): https://publons.com/publon/11546919/.
    10.3233/978-1-61499-601-9-374
  32. "Improved laboratory techniques for advanced geotechnical characterization towards matching in situ properties". Deformation Characteristics of Geomaterials (2015): https://publons.com/publon/18254686/.
    10.3233/978-1-61499-601-9-231
  33. Granja, José L.; Miguel Azenha; Sousa, Christoph de; Cristiana Maria da Fonseca Ferreira; Granja, J.L.; Azenha, M.; De Sousa, C.; Ferreira, C.. "Comparison Between Different Experimental Techniques for Stiffness Monitoring of Cement Pastes". Journal of Advanced Concrete Technology 12 2 (2014): 46-61. https://www.jstage.jst.go.jp/article/jact/12/2/12_46/_article.
    Published • 10.3151/jact.12.46
  34. Ferreira, Cristiana; Martins, João P.; Gomes Correia, António. "Determination of the Small-Strain Stiffness of Hard Soils by Means of Bender Elements and Accelerometers". Geotechnical and Geological Engineering July 2013 (2013): 1-7. http://link.springer.com/article/10.1007%2Fs10706-013-9678-7#.
    Published • 10.1007/s10706-013-9678-7
  35. Jacinto Silva; Miguel Azenha; António Gomes Correia; Cristiana Maria da Fonseca Ferreira. "Continuous stiffness assessment of cement-stabilised soils from early age". Géotechnique 63 16 (2013): 1419-1432.
    Published • 10.1680/geot.13.P.021
  36. Miguel Azenha; Ferreira, Cristiana; Jacinto Silva; António Gomes Correia; Rafael Aguilar; Luís Ramos; Azenha, M.; et al. "Continuous stiffness monitoring of cemented sand through resonant frequency". American Society of Civil Engineers - Geotechnical Special Publication (ASCE-GSP) Series (EI Indexed) --- (2011): 1-10.
    Published • 10.1061/47629(408)22
  37. Ferreira, C.; Da Fonseca, A.V.; Nash, D.F.T.. "Shear wave velocities for sample quality assessment on a residual soil". Soils and Foundations 51 4 (2011): 683-692. http://www.scopus.com/inward/record.url?eid=2-s2.0-84866896583&partnerID=MN8TOARS.
    10.3208/sandf.51.683
  38. Da Fonseca, A.V.; Ferreira, C.; Fahey, M.. "A framework interpreting bender element tests, combining time-domain and frequency-domain methods". Geotechnical Testing Journal 32 2 (2009): 91-107. http://www.scopus.com/inward/record.url?eid=2-s2.0-73449094543&partnerID=MN8TOARS.
  39. "A Framework Interpreting Bender Element Tests, Combining Time-Domain and Frequency-Domain Methods". Geotechnical Testing Journal (2009): https://publons.com/publon/10732546/.
    10.1520/GTJ100974
  40. "Seismic wave measurements on residual soil from granite in a new true triaxial apparatus". DEFORMATION CHARACTERISTICS OF GEOMATERIALS, VOLS 1 AND 2 (2008): https://publons.com/publon/18254687/.
  41. Consoli, N.C.; Heineck, K.S.; Coop, M.R.; Da Fonseca, A.V.; Ferreira, C.. "Coal bottom ash as a geomaterial: Influence of particle morphology on the behavior of granular materials". Soils and Foundations 47 2 (2007): 361-373. http://www.scopus.com/inward/record.url?eid=2-s2.0-42749090378&partnerID=MN8TOARS.
    10.3208/sandf.47.361
  42. Arroyo, Marcos; Ferreira, Cristiana; Sukolrat, Jiraroth. "Dynamic measurements and porosity in saturated triaxial specimens". Solid Mechanics and its Applications (2007): https://publons.com/publon/6475248/.
    10.1007/978-1-4020-6146-2_35
  43. Ferreira, Cristiana; da Fonseca, Antonio Viana; Santos, Jaime A.. "Comparison of simultaneous bender elements and resonant column tests on Porto residual soil". Solid Mechanics and its Applications (2007): https://publons.com/publon/10732571/.
    10.1007/978-1-4020-6146-2_34
  44. António Viana da Fonseca; José Fernando Vieira de Sousa; Cristiana Maria da Fonseca Ferreira. "Parâmetros de deformabilidade definidos de ensaios in situ “simples e robustos” e sua relação com valores “nobres” de referência em solos saprolíticos de granito.". Geotecnia 106 (2006): 5-22.
    Published
  45. António Viana da Fonseca; Jorge Carvalho; Cristiana Maria da Fonseca Ferreira; Jaime Santos; Fernando Almeida. "Combinação de métodos geofísicos e mecânicos para a caracterização do perfil de solo residual do ISC’2 na FEUP". Geotecnia 107 (2006): 91-108.
    Published
  46. Fonseca, A.V.D.; Carvalho, J.; Ferreira, C.; Santos, J.A.; Almeida, F.; Pereira, E.; Feliciano, J.; Grade, J.; Oliveira, A.. "Characterization of a profile of residual soil from granite combining geological, geophysical and mechanical testing techniques". Geotechnical and Geological Engineering 24 5 (2006): 1307-1348. http://www.scopus.com/inward/record.url?eid=2-s2.0-33748314470&partnerID=MN8TOARS.
    10.1007/s10706-005-2023-z
  47. Viana da Fonseca, A.; Vieira, N.; Ferreira, C.. "Processo de saturacíon de ensayos triaxiales". Geotecnia 104 (2006): 33-48. www.spgeotecnia.pt/.
    Published
  48. António Viana da Fonseca; Ferreira, Cristiana Maria da Fonseca; Jorge Carvalho. "The use of shear wave velocities determined in Down-Hole (Vsvh) and Cross-Hole (Vshv) tests for the evaluation of K0.". Soils and Rocks 28 3 (2005): 271-281.
    Published
  49. Nelly Faria; António Viana da Fonseca; Cristiana Maria da Fonseca Ferreira. "Proceso de saturación de ensayos triaxiales". Geotecnia 107 (2005): 31-42.
    Published
  50. Viana da Fonseca, A.; Ferreira, C.; Carvalho, J.M.. "The use of shear wave velocities determined in down-hole (Vsvh) and cross-hole (Vshv) tests for the evaluation of K0 in soils". Solos e Rochas 28 3 (2005): 271-281. http://www.scopus.com/inward/record.url?eid=2-s2.0-31944441190&partnerID=MN8TOARS.
  51. Viana da Fonseca, A.; Carvalho, J.; Ferreira, C.. "The use of shear wave velocities determined in Down-Hole (Vsvh) and Cross-Hole (Vshv) tests for the evaluation of K0. Solos e Rochas (Cessou em 2006. Cont. ISSN 1980-9743 Soils & Rocks)". Solos e Rochas (Cessou em 2006. Cont. ISSN 1980-9743 Soils & Rocks) 28 V28 (2005): 271-281.
    Published
  52. "Geotechnical characterization of a residual soil profile: the ISC'2 experimental site, FEUP". Geotechnical and Geophysical Site Characterization Vols 1 and 2 (2004): https://publons.com/publon/18254688/.
  53. da Fonseca, A. Viana.; Ferreira, C.; Carvalho, J. M.. "Tentative evaluation of K-0 from shear waves velocities determined in downhole (V-s(vh)) and crosshole (V-s(hv)) tests on a residual soil". Geotechnical and Geophysical Site Characterization Vols 1 and 2 (2004): https://publons.com/publon/18254689/.
Preprint
  1. Marisa Soares; António Viana da Fonseca; Cristiana Ferreira; Sara Rios. "Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading". 2023. https://doi.org/10.20944/preprints202307.0223.v1.
    10.20944/preprints202307.0223.v1
Report
  1. Viana da Fonseca, A.; Millen, M.; Romão, X.; Quintero, J.; Rios, S.; Ferreira, C.; Panico, F.; et al. 2018. Deliverable Report D3.2 - Methodology for the liquefaction fragility analysis of critical structures and infrastructures: description and case studies..
  2. Ferreira, Cristiana; António Viana da Fonseca; André Pinheiro. 2008. Relatórios de actividades no âmbito do protocolo IC-TD sobre o tema “Estudos de avaliação das condições que conduziram à liquefacção da areia "Sable de Les Dunes” aquando do sismo de Boumerdes, Argélia, 2003”.
  3. Ferreira, Cristiana Maria da Fonseca; António Viana da Fonseca. 2005. International Parallel Tests on Bender Elements at the University of Porto, Portugal. Relatório para o Comité Técnico TC29 da ISSMGE.. https://www.fe.up.pt/si/publs_pesquisa.formview?p_id=14204.

Other

Other output
  1. Sistemas de solo compósito-betão : caracterização da interface geocompósito-betão. 2010. Carlos, Karina Gonçalves; Sena-Cruz, José; Barros, Joaquim A. O.; Miranda, Tiago F. S.; Ferreira, Cristiana; Azenha, Miguel.
Activities

Supervision

Thesis Title
Role 		Degree Subject (Type)
Institution / Organization
2015/02/15 - 2015/09/30 Avaliação da influência da anisotropia da rigidez de solos estabilizados com misturas geopoliméricas.
Supervisor
Universidade do Porto Faculdade de Engenharia, Portugal
2014 - 2014 Numerical modelling of the dynamic behaviour of a soil in true triaxial tests with bender elements
Supervisor
 Engenharia Civil (Master)
Universidade do Porto, Portugal
2014 - 2014 Abordagem à problemática da amostragem em solos granulares com envelhecimento natural através de ondas sísmicas
Supervisor
 Engenharia Civil (Master)
Universidade do Porto, Portugal
2010 - 2010 Avaliação do Comportamento de uma Fundação Superficial através de Ensaios num Modelo a Escala Reduzida
Supervisor
 Engenharia Civil (Master)
Universidade do Minho, Portugal
2009 - 2009 Derivação em Triaxial Cíclico de Parâmetros de Estado e de Acção Sísmica que Induziram Liquefacção de Areias Dunares num Sismo em Argel. Sensibilidade das Velocidades de Ondas de Corte como Índice de Risco.
Co-supervisor
 Engenharia Civil (Master)
Universidade do Porto, Portugal

Event organisation

Event name
Type of event (Role) 		Institution / Organization
2020/09/03 - 2023/09/06 IS-Porto 2023: 8th International Symposium on Deformation Characteristics of Geomaterials, 3-6 September 2023, FEUP, Porto, Portugal.(https://fe.up.pt/~is-porto2023/) (2023/09/03 - 2023/09/06)
Symposium (Co-organisor)
2010 - 2010 12º Congresso Nacional de Geotecnia “Geotecnia e Desenvolvimento Sustentável”
Congress (Other)

Association member

Society Organization name Role
2009/04 - Current ISSMGE - International Society of Soil Mechanics and Geotechnical Engineering
2000/04 - Current SPG - Sociedade Portuguesa de Geotecnia

Course / Discipline taught

Academic session Degree Subject (Type) Institution / Organization
2014/02 - Current Mecânica dos Solos 2 (Mestrado integrado) Universidade do Porto Faculdade de Engenharia, Portugal
2014 - Current Geologia de Engenharia Universidade do Porto Faculdade de Engenharia, Portugal
2013/09 - Current Mecânica dos Solos 1 (Mestrado integrado) Universidade do Porto Faculdade de Engenharia, Portugal
2010/09 - 2011/08 Análise Dinâmica e Engenharia Sísmica Engenharia Civil (Mestrado) Universidade do Minho, Portugal
2010/09 - 2011/08 Geotecnia II Engenharia Civil (Mestrado) Universidade do Minho, Portugal
2010/09 - 2011/08 Geotecnia I Engenharia Civil (Mestrado) Universidade do Minho, Portugal

Journal scientific committee

Journal title (ISSN) Publisher
2018 - Current Geotechnique Letters
2013 - Current Geotecnia
2013 - Current Geotechnical and Geological Engineering
2012 - Current Geotechnical Testing Journal
2012 - Current Soils and Foundations
2009 - Current Rivista Italiana di Geotecnica
2006 - Current Geomechanics & Geoengineering
Distinctions

Award

2021 Prémio Revista Geotecnia - Úlpio Nascimento para o biénio 2018-2019
Sociedade Portuguesa de Geotecnia, Portugal
2016 Prémio Eng. Cruz Azevedo
Associação Portuguesa de Análise Experimental de Tensões (APAET), Portugal
2009 SPG Award for participation in the 4th International Young Geotechnical Engineers Conference (4iYGEC)
SPG - Sociedade Portuguesa de Geotecnia, Portugal
2006 Honours SPG Award for Master Thesis in Geotechnics / Menção Honrosa do Prémio SPG para Teses de Mestrado em Geotecnia
SPG - Sociedade Portuguesa de Geotecnia, Portugal