Juan Sagaseta

Dr Juan Sagaseta

Reader in Structural Robustness
+44 (0)1483 686649
31 AA 03



Dr Juan Sagaseta joined University of Surrey as a Lecturer in September 2010. He obtained the degree of Civil Engineering (Ingeniero de Caminos, Canales y Puertos) at the School of Civil Engineering in Santander, University of Cantabria (Spain) in 2003. During his degree, he specialized in the area of structures obtaining a final grade of A (Sobresaliente). After graduation, he worked as a Structural Engineer in a consultancy office in Madrid (Proes) carrying out structural design of buildings and bridges. In 2005, he moved to London to start his PhD at Imperial College London on Shear Design of Reinforced Concrete Structures. His thesis was focused on the influence of aggregate fracture on the shear strength of reinforced concrete beams. This work included testing of large-scale specimens and developing analytical models using the strut-and-tie method, discrete crack approaches and non-linear finite element analysis. The work was summarized in five journal papers and several conference papers. During his PhD he was a Graduate Teaching Assistant at the Department of Civil and Environmental Engineering at Imperial College London in the following courses: Constructionarium project, Creative Design, Reinforced Concrete Design, Structural Mechanics and Autocad Drawing.

From 2008 to 2010, Dr Juan Sagaseta was a Post-doctoral Research Fellow at École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland, where he carried out research on punching shear of flat slabs and slab bridges. His work at EPFL focused on extending existing punching shear models and design methods to non-symmetrical cases, which are commonly found in practice. The findings contributed towards the validation of the new design formulas for punching shear in the first version of the New Model Code 2010 produced by the Fédération Internationale du Béton (fib). In 2011 he was awarded the fib Achievement Award (research category) based on his Doctoral Thesis for the scientific and technical contributions in the area of structural concrete. In 2012 he received the Magazine of Concrete Research Award (ICE publishing) for best paper of the year. In 2013-2014 he was the principal investigator in a EPSRC project on the structural performance of flat slab-column connections under impact and blast loading. He is currently involved in research on structural robustness and the development of innovative forms of construction using steel-concrete solutions.

Research interests

Structural modelling

• Modelling of structural concrete, steel, glass and composite steel/concrete solutions• Non-linear finite element modelling• Compression Field and Stress Field theories• Strut-and-tie method

Development of analytical models for structural concrete design/analysis

• Discrete crack modelling and fracture mechanics• Aggregate interlock action and crack development• High-strength and high-performance concrete• Fibre reinforced concrete

Shear and punching shear in reinforced concrete structures

• Development of improved shear and punching shear design methods• Non-symmetrical punching shear in flat slabs and slab bridges• Shear strengthening techniques using CFRP and composite materials

Structural engineering

• Innovative methods of structural inspections based on digital engineering• Development of design equations for new modular construction systems

Extreme loading

• Development of analytical models for impact and blast loading in RC structures• Testing of structural elements under impact loading• Influence of loading rates on material and structural behaviour• Progressive collapse analysis in RC structures


Module coordinator in• Year 4 (MEng/MSc) - Structural Mechanics and FE (ENGM053)• Year 4 (MEng/MSc) - Concrete Building Design (ENGM041)• Year 4 (MEng/MSc) - Building Information Modelling (ENGM281); lectures delivered by experts from industry• Year 3 - Structural Engineering (ENG3176)• Supervision/co-supervision of MSc and UG final projects• Supervision/co-supervision of PhD projects

Departmental duties

• Coordinator of the University of Surrey/Institution of Civil Engineers Scholarship Scheme (refer to website).• Corporate member of the ICE Thames Valley Branch Committee (South East England).• Academic member of the Civil and Environmental Engineering Industrial Advisory Board at University of Surrey.


Affiliations to professional bodies

2011 - Institution of Civil Engineers (MICE), UK2011 - European Federation of National Engineering Associations (FEANI)2011 - Asociación de Ingenieros de Caminos, Canales y Puertos (AICCP), Spain2003 - CICCP (Spanish professional body of Civil Engineers), Spain

Contribution to scientific and technical working groups

fib Working Party 2.2.1 Shear in beamsfib Working Party 2.2.3 Punching and shear in flat slabsConcrete Industry Eurocode 2 Group (CIEGmkII), UK

Editorial boards

Member of the Editorial Board for Magazine of Concrete Research (ICE publishing)Guest editor for special publications on robustness (Elsevier, fib, Hindawi)Acts as reviewer in international technical journals (e.g. ACI Structural Journal, Engineering structures, Proceedings of the ICE, Hormigon y Acero)

Affiliation to scientific and technical societies

fib (Fédération Internationale du Béton)British Precast Concrete Federation (University of Surrey associate member)ACHE (Scientific Association of Structural Concrete), SpainMember of the International Masonry Society

Awards and Honours

2012 - Magazine of Concrete Research Award (ICE publishing) for best paper of the year2011 - fib Achievement Award (research category)2006 - Scholarship for international postgraduate studies (Fundación Caja Madrid)2002 - Nomination for The National Society of Collegiate Scholars (USA)2002 - Outstanding Service Award from ASCE for the UNCC concrete canoe team


Peer reviewed journal papers

Garzón-Roca J, Sagaseta J, Micallef K, (2023) 'Sudden column removal in tall buildings with flat slabs supported on core and perimeter columns'. Structures, 56, p.104919 (doi: 10.1016/j.istruc.2023.104919)

Caredda G, Makoond N, Buitrago M, Sagaseta J, Chryssanthopoulos M, Adam JM, (2023) 'Learning from the progressive collapse of buildings'. Developments in the built environment, 15, p.100194 (doi: 10.1016/j.dibe.2023.100194)

Buitrago M, Makoond N, Moragues JJ, Sagaseta J, Adam JM, (2023) 'Robustness of a full-scale precast building structure subjected to corner-column failure'. Structures, 52, pp. 824-841 (doi: 10.1016/j.istruc.2023.03.146)

Ulaeto NW, Sagaseta J, Chryssanthopoulos J, (2021) 'Horizontal collapse propagation of concrete flat slabs supported on columns'. ASCE Journal of Structural Engineering, 148(2), pp.  (doi: 10.1061/(ASCE)ST.1943-541X.0003245)

Ulaeto NW, Sagaseta J, (2021) 'A post-punching shear model for column-slab connections for progressive collapse analyses'. Magazine of Concrete Research, 74(6), pp. 284-302 (doi: 10.1680/jmacr.19.00486)

Garzón-Roca J, Sagaseta J, Buitrago M, Adam JM, (2021) 'Dynamic punching assessment of edge columns after sudden corner column removal'. ACI Structural Journal, 118(2), pp. 299-311 (doi: 10.14359/51728195, Full text available at epubs.surrey.ac.uk/853819/).

Buitrago M, Bertolesi E, Sagaseta J, Calderón PA, Adam JM, (2021) 'Robustness of RC building structures with infill masonry walls: Tests on a purpose-built structure'. Engineering Structures, 226 (doi: 10.1016/j.engstruct.2020.111384)

Adam JM, Buitrago M, Bertolesi E, Sagaseta J, Moragues JJ, (2020) 'Dynamic performance of a real-scale reinforced concrete building test under a corner-column failure scenario'. Engineering Structures, 210, pp. 1-14 (doi: 10.1016/j.engstruct.2020.110414) (Full text available at epubs.surrey.ac.uk/853819/)

Buitrago M, Sagaseta J, Adam JM, (2020) 'Avoiding failures during building construction using structural fuses as load limiters on temporary shoring structures'. Engineering Structures, 204, pp. 1-16 (doi: 10.1016/j.engstruct.2019.109906) (Full text available at epubs.surrey.ac.uk/853153/)

Buitrago M, Sagaseta J, Adam JM, (2020) 'A Parametric Computational Study of RC Building Structures under Corner-Column Removal Situations'. Applied Sciences, 10(24), 8911 (open access, doi: 10.3390/app10248911)

Collings D, Sagaseta J, (2019) 'Modern concrete bridge deck analysis considering the effects of cracking'. Proceedings of the ICE - Structures and Buildings (doi: 10.1680/jstbu.16.00184) (Full text available at epubs.surrey.ac.uk/849633/)

Meléndez C, Sagaseta J, Miguel Sosa PF, Pallarés Rubio L., (2019) 'Refined 3D strut-and-tie model for analysis and design of four-pile caps'. ACI Structural Journal, 116 (4), pp. 15-29 (doi: 10.14359/51714485) (Full text available at epubs.surrey.ac.uk/849633/) ACI Mete A. Sozen Award.

Russell JM, Sagaseta J, Cormie D, Jones AEK., (2019) 'Historical review of prescriptive design rules for robustness after the collapse of Ronan Point'. Structures, 20, pp. 365-373 (doi.org/10.1016/j.istruc.2019.04.011)

Stochino F, Bedon C, Sagaseta J, Honfi D., (2019) 'Robustness and resilience of structures under extreme loads'. Advances in Civil Engineering, special issue on Advances in Design of Protective Structures, Volume 2019, ID 4291703, 14 pp. (Open access link)

Kafina R, Sagaseta J, (2018) 'Analysis of outrigger-braced reinforced concrete supertall buildings: Core-supported and tube-in-tube lateral systems'. Structural Design of Tall and Special Buildings, 28:e1567, pp. 1-22 (doi: 10.1002/tal.1567) (Full text is available at epubs.surrey.ac.uk/849572)

Buitrago M, Sagaseta J, Adam JM., (2018) 'Effects of sudden failure of shoring elements in concrete building structures under construction'. Engineering Structures, 117, pp. 508-522 (doi: 10.1016/j.engstruct.2018.06.052)

Adam JM, Parisi F, Sagaseta J, Xinzheng L. (2018) 'Research and practice on progressive collapse and robustness of building structures in the 21st century'. Engineering Structures, 117, pp. 122-149 (Open access link)

Sagaseta J, Ulaeto NW. (2018) 'Discussion of paper Behaviour of reinforced concrete slabs under low-velocity impact by Y. Xiao, B. Li and K. Fujikake'. ACI Structural Journal, 115 (2), pp. 559-562 (Full text is available at epubs.surrey.ac.uk/844924)

Sagaseta J, Francis P. (2018) 'Out-of-plane shear strength of steel-concrete sandwich panels'. fib Bulletin no. 85, pp. 225-238 (Full text is available at epubs.surrey.ac.uk/844921/)

Sagaseta J, Olmati P, Micallef K, Cormie D. (2017) 'Punching shear failure in blast-loaded RC slabs and panels'. Engineering Structures, 147, pp. 177-194. (doi: 10.1016/j.engstruct.2017.04.051) (Open access link)

Hicks M, Sagaseta J. (2017) 'Structural appraisal of existing masonry quadripartite vaults'. Proceedings of the ICE - Structures and Buildings, pp. 1-13. (doi: 10.1680/jstbu.16.00184). ICE Frederick Palmer Prize.

Olmati P, Sagaseta J,Cormie D, Jones AEK. (2017) 'Simplified reliability analysis of punching in reinforced concrete flat slab buildings under accidental actions'. Engineering Structures, 130, pp. 83-98. (doi: 10.1016/j.engstruct.2016.09.061 ) (Open access link)

Sagaseta J, Ulaeto N, Russell J. (2017) 'Structural robustness of concrete flat slab structures'. fib Bulletin No. 81/ACI SP-315, pp. 273-298. (Full text is available at epubs.surrey.ac.uk/812170/)

Fernández Ruiz M, Muttoni A, Sagaseta J. (2015) 'Shear strength of concrete members without transverse reinforcement: A mechanical approach to consistently account for size and strain effects'. Engineering Structures, 99, pp. 360-372. (doi: 10.1016/j.engstruct.2015.05.007 )

Collings D,Sagaseta J. (2015) 'A review of arching and compressive membrane action in concrete bridges'. Proceedings of the Institution of Civil Engineers - Bridge Engineering, 169 (4), pp. 271-284. (doi: 10.1680/bren.14.00039 )

Sagaseta J, Tassinari L, Fernández Ruiz M, Muttoni M. (2014) 'Punching of flat slabs supported on rectangular columns'. Engineering Structures, 77, pp. 17-33. (doi: 10.1016/j.engstruct.2014.07.007)

Micallef K, Sagaseta J, Fernández Ruiz M, Muttoni A. (2014) 'Assessing punching shear failure in reinforced concrete flat slabs subjected to localized impact loading'. International Journal of Impact Engineering, 71, pp. 17-33. (doi: 10.1016/j.ijimpeng.2014.04.003) (Open access link)

Sagaseta J. (2013) 'The influence of aggregate fracture of the shear strength of reinforced concrete beams: an experimental and analytical research'. Structural Concrete, 14 (4), pp. 401-414. (doi: 10.1002/suco.201200015)

Fernández Ruiz M, Sagaseta J, Muttoni A. (2011) 'The critical shear crack theory as a physical model for punching shear design and its implementation into new Model Code 2010'. Hormigón y Acero, Madrid, Spain (in Spanish), 63 (263), pp. 49-63. (Free access at Hormigon y Acero, ACHE)

Bukhari IA, Vollum RL, Ahmad S, Sagaseta J. (2013) 'Shear strengthening of short span reinforced concrete beams with CFRP sheets'. The Arabian Journal for Science and Engineering (AJSE), Saudi Arabia, 38 (3), pp. 523-536. (doi: 10.1007/s13369-012-0333-z)

Sagaseta J, Muttoni A, Fernández Ruiz M, Tassinari L. (2011) 'Non-axis-symmetrical punching shear around internal columns of RC slabs without transverse reinforcement'. Magazine of Concrete Research, 63 (6), pp. 441-457. (doi: 10.1680/macr.10.00098) (Free access ICE virtual library). Magazine of Concrete Research Award.

Sagaseta J, Vollum RL. (2011) 'Influence of aggregate fracture on shear transfer through cracks in reinforced concrete'. Magazine of Concrete Research, 63 (2), pp. 119-137. (doi: 10.1680/macr.9.00191) (Full text is available at epubs.surrey.ac.uk/713657/)

Sagaseta J, Vollum RL. (2011) 'Influence of beam cross-section, loading arrangement and aggregate type on shear strength'. Magazine of Concrete Research, 63 (2), pp. 139-155. (doi: 10.1680/macr.9.00192) (Full text is available at epubs.surrey.ac.uk/713658/)

Sagaseta J, Vollum RL. (2010) 'Shear design of short span beams'. Magazine of Concrete Research, 62 (4), pp. 267-282. (doi: 10.1680/macr.10.00098) (Full text is available at epubs.surrey.ac.uk/713660/)

Bukhari IA, Vollum RL, Ahmad S, Sagaseta J. (2010) 'Shear strengthening of reinforced concrete beams with CFRP'. Magazine of Concrete Research, 62 (1), pp. 65-77. (doi: 10.1680/macr.2010.62.4.267) (Full text is available at epubs.surrey.ac.uk/713661/)

Sagaseta J, Vollum RL. (2009) 'Non-linear finite element analysis of shear critical high-strength concrete beams'. Architecture Civil Engineering Environment (ACEE), 2 (4), The Silesian University of Technology, pp. 95-106. (Open access link)

Peer reviewed conference papers

Garzón-Roca J, Sagaseta J, Buitrago M, Adam JM. (2020) 'Validation of dynamic punching shear assessment after sudden column removal'. fib Sympoium 2020, Concrete Structures for Resilient Society, Online, Shanghai, China, pp. 828-839.

Adam JM, Buitrago M, Calderón P, Bertolesi E, Sagaseta J, Moragues JJ. (2020) 'Testing of full-size concrete building structures under sudden column removal'. fib Sympoium 2020, Concrete Structures for Resilient Society, Online, Shanghai, China, pp. 840-847.

Farrugia J, Sagaseta J. (2020) 'Dynamic analysis of diaphragm action of spherically voided concrete slabs for seismic design'. fib Sympoium 2020, Concrete Structures for Resilient Society, Online, Shanghai, China, pp. 941-948.

Parisi F, Adam JM, Sagaseta J, Lu X. (2017) 'Review of experimental research on progressive collapse of RC structures'. In IF CRASC'17: IV Convegno di Ingegneria Forense, Rome, Italy, Vol. 2.

Ulaeto N, Sagaseta J. (2017) 'Numerical modelling of symmetric and asymmetric punching and post-punching shear responses of RC '. In 11th European LS-DYNA Conference 2017, Salzburg, Austria. (Full text is available at epubs.surrey.ac.uk/841274/)

Collings D, Sagaseta J. (2015) 'Analysis of test database for RC structures and compressive membrane action '. ACI European Bridge Conference & Exhibition 2015, Edinburgh, Scotland.

Sagaseta J, Muttoni A, Fernández Ruiz M. (2013) 'Towards developing mechanical punching shear models for flat slabs subjected to impact and blast loading'. Proceedings of fib International Symposium 2013, Tel-Aviv, Israel, pp. 581-584.

Clement T, Muttoni A, Sagaseta J. (2013) 'Punching shear strength of PC slabs'. Proceedings of fib International Symposium 2013, Tel-Aviv, Israel, pp. 289-292.

Sagaseta J, Tassinari L, Fernández Ruiz M, Muttoni A. (2011) 'New provisions for punching shear in Model Code 2010 based on the critical shear crack theory'. Proceedings of fib International Symposium 2011, Prague, Czech Republic, Vol. 1, pp. 155-158.

Sagaseta J, Fernández Ruiz M, Muttoni A. (2009) 'Non-symmetrical punching of flat slabs and slab bridges without transverse reinforcement'. Proceedings of fib International Symposium 2009, London.Sagaseta J, Vollum RL. (2009) 'Relative crack displacements in high strength concrete beams failing in shear'. Proceedings of fib International Symposium 2009, London.

Sagaseta J, Vollum RL. (2008) 'Non-linear finite element analysis of shear critical high-strength concrete beams'. Proceedings of AMCM 6th International Conference, Lodz, Poland, pp. 9-11.

Sagaseta J, Vollum RL. (2008) 'Strut-and-tie modelling of short span beams'. Proceedings of fib International Symposium 2008, Tailor Made Concrete Structures, Amsterdam, pp. 19-22.

Sagaseta J, Vollum RL. (2007) 'Influence of aggregate fracture in shear design of HS concrete structures'. Concrete Communication Symposium (The Concrete Centre), Sheffield, UK, pp. 29-30.

Other publications

Ulaeto N, Sagaseta J. (2017) 'Numerical and analytical modelling of localized impact load in RC panels and slabs'. Fire and blast information group (FABIG), 70, pp. 56-63. (Full text is available at epubs.surrey.ac.uk/813516/)

Sagaseta J. (2015) 'Why buildings collapse'. EPSRC Impact Acceleration Account Review University of Surrey 2014-15, pp. 17. (link)

Sagaseta J. (2008) 'The influence of aggregate fracture on the shear strength of reinforced concrete beams'. PhD Thesis, Department of Civil and Environmental Engineering Imperial College London.

Vollum RL, Sagaseta J. (2008) 'Investigation into influence of Ductility Class on shear strength of reinforced concrete beams'. Technical Report for BAR, Imperial College London.