Thomas Keller
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Full Professor
thomas.keller@epfl.ch +41 21 693 32 26 http://cclab.epfl.ch/
EPFL ENAC IIC CCLAB
BP 2220 (Bâtiment BP)
Station 16
1015 Lausanne
+41 21 693 32 26
+41 21 693 32 52
Office:
BP 2220
EPFL
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ENAC
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CCLAB
Web site: Web site: https://cclab.epfl.ch/
+41 21 693 32 26
EPFL
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SAR-ENS
Biography
I obtained a Civil Engineering Degree from the Swiss Federal Institute of Technology Zurich, ETH, in 1983. Subsequently, I worked at the architecture and engineering office of Santiago Calatrava, where, in 1987, I developed the structural concept of the (200-m span) Alamillo Bridge in Seville (first cable-stayed bridge without back cables). In 1992, I received my doctoral degree from ETH, under the supervision of Prof. Christian Menn. In 1998, I was appointed as a (part-time) Associate Professor and in 2007 as Full Professor of Structural Engineering at the Swiss Federal Institute of Technology Lausanne, EPFL.
Today, I am the head of the Composite Construction Laboratory, CCLab at EPFL, which I founded in 2000. My research work is focused on the development of material-tailored applications of composites in structural engineering and architecture. I was a founding member of the International Institute for FRP in Construction, IIFC, and a member of the CEN/TC 250 Project Team to establish the European Technical Specification “Design of fibre-polymer composite structuresˮ, CEN/TS 19101, published in 2022.
As a practical engineer, I designed the first composite pedestrian bridge in Switzerland (Pontresina Bridge, 1997), which is also one of the first composite bridges in Europe. Furthermore, I was responsible for the structural design of the five-story Eyecatcher Building (Basel, 1998), which is still the tallest building in the world with a primary composite structure. I also contributed to the design of the free-form multifunctional composite sandwich roof of the Novartis Campus Entrance Building (Basel, 2006) and the hybrid Avançon (vehicular) Bridge with an adhesively bonded composite-balsa sandwich deck (Bex, 2012).
Publications
Infoscience publications
Journal articles
Fire Dynamic Responses of Fiber-Reinforced Polymer Composite Buildings
Journal Of Composites For Construction. 2024-06-01. DOI : 10.1061/JCCOF2.CCENG-4504.Numerical investigation of two-dimensional Mode-II delamination in composite laminates
Composites Part A-Applied Science And Manufacturing. 2024-01-19. DOI : 10.1016/j.compositesa.2024.108012.A novel fatigue life prediction methodology based on energy dissipation in viscoelastic materials, synergistic effects of stress level, stress ratio, and temperature
International Journal of Fatigue. 2024-04-04. DOI : 10.1016/j.ijfatigue.2024.108296.Short-term behavior of glass fiber-polymer composite bending-active elastica beam under service load application
Composite Structures. 2024-04-03. DOI : 10.1016/j.compstruct.2024.118080.Tension-tension fatigue behavior of basalt composite hybrid joints
International Journal of Fatigue. 2024-04-06. DOI : 10.1016/j.ijfatigue.2024.108318.A novel methodology of predicting temperature and rate effects on tensile properties of viscoelastic materials
International Journal Of Non-Linear Mechanics. 2023-12-19. DOI : 10.1016/j.ijnonlinmec.2023.104613.Novel multi-crack damage approach for pultruded fiber-polymer web-flange junctions
Composites Part B-Engineering. 2023-11-18. DOI : 10.1016/j.compositesb.2023.111102.Experimental investigation of rotational behavior of pseudo-ductile adhesive angle joints exhibiting variable strain rate
Composites Part B: Engineering. 2023-10-11. DOI : 10.1016/j.compositesb.2023.111009.Experimental investigation of two-dimensional Mode-II delamination in composite laminates
Composites Part A-Applied Science And Manufacturing. 2023-10-01. DOI : 10.1016/j.compositesa.2023.107666.Mode I and Mode II fracture behavior in pultruded glass fiber-polymer - Experimental and numerical investigation
Composites Part B-Engineering. 2023-09-13. DOI : 10.1016/j.compositesb.2023.110988.Experimental and theoretical study on out-of-plane compression buckling properties of grid beetle elytron plate
Archive Of Applied Mechanics. 2023-08-22. DOI : 10.1007/s00419-023-02486-1.Effects of prestress implementation on self-stress state in large-scale tensegrity structure
Engineering Structures. 2023-05-04. DOI : 10.1016/j.engstruct.2023.116222.Mechanical behavior and failure of carbon fiber-reinforced composite sandwich structure inspired by curved-crease origami
Composite Structures. 2023-04-18. DOI : 10.1016/j.compstruct.2023.117033.Effect of fiber architecture on tension-tension fatigue behavior of bolted basalt composite joints
Engineering Structures. 2023-04-17. DOI : 10.1016/j.engstruct.2023.116089.Effects of core air gaps and steel inserts on thermomechanical response of GFRP-balsa sandwich panels subjected to fire
Composite Structures. 2023-03-20. DOI : 10.1016/j.compstruct.2023.116924.Prefabricated thermally-activated fiber-polymer composite building slab P-TACS: Toward the multifunctional and pre-fabricated structural elements in buildings
Journal Of Building Physics. 2023-01-26. DOI : 10.1177/17442591221150257.Mechanical properties of FRP materials at elevated temperature-Definition of a temperature conversion factor for design in service conditions
Construction And Building Materials. 2023-01-09. DOI : 10.1016/j.conbuildmat.2023.130298.Effects of core air gaps and steel inserts on thermal response of GFRP-balsa sandwich panels subjected to fire
Fire Safety Journal. 2022-12-01. DOI : 10.1016/j.firesaf.2022.103703.Viscoelastic adhesive modeling of ductile adhesive-composite joints during cyclic loading
International Journal of Adhesion and Adhesives. 2022-12. DOI : 10.1016/j.ijadhadh.2022.103241.Fiber-polymer composites for permanent large-scale bending-active elastica beams
Composite Structures. 2022-08-15. DOI : 10.1016/j.compstruct.2022.115809.Thermophysical and thermomechanical properties of basalt-phenolic FRP rebars under high temperature
Construction And Building Materials. 2022-08-01. DOI : 10.1016/j.conbuildmat.2022.127983.Thermal and mechanical performances of GFRP sandwich structures with integrated amorphous silicon photovoltaic cells
Composite Structures. 2022-06-15. DOI : 10.1016/j.compstruct.2022.115524.A novel fatigue life prediction methodology based on energy dissipation in viscoelastic materials (vol 152, 106457, 2021)
International Journal Of Fatigue. 2022-05-01. DOI : 10.1016/j.ijfatigue.2022.106742.Thermophysical properties of balsa wood used as core of sandwich composite bridge decks exposed to external fire
Construction And Building Materials. 2022-04-25. DOI : 10.1016/j.conbuildmat.2022.127164.A novel fatigue life prediction methodology based on energy dissipation in viscoelastic materials
International Journal Of Fatigue. 2021-11-01. DOI : 10.1016/j.ijfatigue.2021.106457.Experimental investigation on the moment-rotation performance of pultruded FRP web-flange junctions
Composites Part B-Engineering. 2021-10-01. DOI : 10.1016/j.compositesb.2021.109087.Static and dynamic mechanical properties of nanosilica and multiwalled carbon nanotube reinforced acrylonitrile butadiene styrene composites: theoretical mechanism of nanofiller reinforcement
Iranian Polymer Journal. 2021-07-24. DOI : 10.1007/s13726-021-00962-5.Numerical modeling of two-dimensional delamination growth in composite laminates with in-plane isotropy
Engineering Fracture Mechanics. 2021-05-13. DOI : 10.1016/j.engfracmech.2021.107787.Tension-tension fatigue behavior of ductile adhesively-bonded FRP joints
Composite Structures. 2021-03-31. DOI : 10.1016/j.compstruct.2021.113925.Origami-inspired carbon fiber-reinforced composite sandwich materials - Fabrication and mechanical behavior
Composites Science And Technology. 2021-03-22. DOI : 10.1016/j.compscitech.2021.108667.Design and foldability of Miura-based cylindrical origami structures
Thin-Walled Structures. 2021-02-01. DOI : 10.1016/j.tws.2020.107311.Mechanical properties of a balsa wood veneer structural sandwich core material
Construction and Building Materials. 2020-09-28. DOI : 10.1016/j.conbuildmat.2020.120193.Resistance and ductility of FRP composite hybrid joints
Composite Structures. 2020-09-24. DOI : 10.1016/j.compstruct.2020.113001.Optimization of multi-directional fiber architecture for resistance and ductility of bolted FRP profile joints
Composite Structures. 2020-09-15. DOI : 10.1016/j.compstruct.2020.112535.Energy dissipation in adhesive and bolted pultruded GFRP double-lap joints under cyclic loading
Composite Structures. 2020-09-15. DOI : 10.1016/j.compstruct.2020.112496.Thermomechanical characterization of a balsa-wood-veneer structural sandwich core material at elevated temperatures
Construction And Building Materials. 2020-01-10. DOI : 10.1016/j.conbuildmat.2019.117037.Experimental investigation of mesoscale variability of clear spruce mechanical properties in the radial direction
Construction and Building Materials. 2020. DOI : 10.1016/j.conbuildmat.2020.121401.Stress mitigation for adhesively bonded photovoltaics with fibre reinforced polymer composites in load carrying applications
Composites Part B-Engineering. 2019-11-15. DOI : 10.1016/j.compositesb.2019.107420.Influence of curved delamination front on R-curve of DCB specimen
Composite Structures. 2019-11-01. DOI : 10.1016/j.compstruct.2019.111311.Modeling of fatigue behavior based on interaction between time- and cyclic-dependent mechanical properties
Composites Part A-Applied Science And Manufacturing. 2019-09-01. DOI : 10.1016/j.compositesa.2019.05.037.Stress ratio effect on tension-tension fatigue behavior of angle-ply GFRP laminates
International Journal Of Fatigue. 2019-09-01. DOI : 10.1016/j.ijfatigue.2019.04.037.Two-dimensional fatigue debonding in GFRP/balsa sandwich panels
International Journal Of Fatigue. 2019-08-01. DOI : 10.1016/j.ijfatigue.2019.03.032.Creep effects on tension-tension fatigue behavior of angle-ply GFRP composite laminates
International Journal of Fatigue. 2019-06-01. DOI : 10.1016/j.ijfatigue.2019.02.010.Two-dimensional quasi-static debonding in GFRP/balsa sandwich panels
Composite Structures. 2019-05-01. DOI : 10.1016/j.compstruct.2019.02.077.Numerically-based method for fracture characterization of Mode I-dominated two-dimensional delamination in FRP laminates
Composite Structures. 2019-04-15. DOI : 10.1016/j.compstruct.2019.02.014.Durability of adhesively bonded joints between pultruded GFRP adherends under hygrothermal and natural ageing
Composites Part B-Engineering. 2019-02-01. DOI : 10.1016/j.compositesb.2018.09.060.Temperature effect on fatigue behavior of basalt fiber-reinforced polymer composites
Polymer Composites. 2019. DOI : 10.1002/pc.25035.Experimental investigation of two-dimensional delamination in GFRP laminates
Engineering Fracture Mechanics. 2018-11-01. DOI : 10.1016/j.engfracmech.2018.05.015.Finite element analysis of initial imperfection effects on kinking failure of unidirectional glass fiber-reinforced polymer composites
Composite Structures. 2018-11-01. DOI : 10.1016/j.compstruct.2018.07.010.Numerical simulation of two-dimensional in-plane crack propagation in FRP laminates
Composite Structures. 2018. DOI : 10.1016/j.compstruct.2018.05.136.Numerical modelling of the thermal response of pultruded GFRP tubular profiles subjected to fire
COMPOSITES PART B-ENGINEERING. 2018. DOI : 10.1016/j.compositesb.2017.11.009.Numerical and analytical investigation of tensile behavior of non-laminated and laminated CFRP straps
COMPOSITE STRUCTURES. 2018. DOI : 10.1016/j.compstruct.2018.05.055.Interrupted tension-tension fatigue behavior of angle-ply GFRP composite laminates
INTERNATIONAL JOURNAL OF FATIGUE. 2018. DOI : 10.1016/j.ijfatigue.2018.05.001.Fatigue damage in angle-ply GFRP laminates under tension-tension fatigue
INTERNATIONAL JOURNAL OF FATIGUE. 2018. DOI : 10.1016/j.ijfatigue.2017.12.015.Effect of stress ratios on tension-tension fatigue behavior and micro-damage evolution of basalt fiber-reinforced epoxy polymer composites
JOURNAL OF MATERIALS SCIENCE. 2018. DOI : 10.1007/s10853-018-2260-1.Ductile adhesively-bonded timber joints - Part 2: Strain rate effect
CONSTRUCTION AND BUILDING MATERIALS. 2018. DOI : 10.1016/j.conbuildmat.2018.05.213.Ductile adhesively-bonded timber joints - Part 1: Experimental investigation
CONSTRUCTION AND BUILDING MATERIALS. 2018. DOI : 10.1016/j.conbuildmat.2018.05.214.Load transfer mechanisms in CFRP ground anchors with multi-strap ends
Composite Structures. 2018. DOI : 10.1016/j.compstruct.2017.09.111.Pull-out behavior of CFRP ground anchors with two-strap ends
Composite Structures. 2017. DOI : 10.1016/j.compstruct.2016.10.048.Fracture mechanics-based progressive damage modelling of adhesively bonded fibre-reinforced polymer joints
Fatigue & Fracture of Engineering Materials & Structures. 2017. DOI : 10.1111/ffe.12647.Displacement rate and structural effects on Poisson ratio of a ductile structural adhesive in tension and compression
International Journal of Adhesion and Adhesives. 2017. DOI : 10.1016/j.ijadhadh.2017.06.008.Two-dimensional analytical stress distribution model for unbalanced FRP composite single-lap joints
European Journal of Mechanics A-Solids. 2017. DOI : 10.1016/j.euromechsol.2017.07.011.Long-term design of FRP-PUR web-core sandwich structures in building construction
Composite Structures. 2017. DOI : 10.1016/j.compstruct.2017.08.089.Mixed mode fracture properties of GFRP-adhesive interfaces based on video gauge and acoustic emission measurements from specimens with adherend fibres normal to the interfaces
Composites Part B. 2017. DOI : 10.1016/j.compositesb.2017.05.001.Fatigue performance of a cold-curing structural epoxy adhesive subjected to moist environments
International Journal of Fatigue. 2017. DOI : 10.1016/j.ijfatigue.2017.06.022.Development of physical and mechanical properties of a cold-curing structural adhesive in a wet bridge environment
Construction and Building Materials. 2017. DOI : 10.1016/j.conbuildmat.2017.03.145.Evaluation of grout materials for CFRP ground anchors with strap ends
Construction and Building Materials. 2017. DOI : 10.1016/j.conbuildmat.2017.04.002.Rotational stiffness of web-flange junctions of pultruded GFRP decks
Engineering Structures. 2017. DOI : 10.1016/j.engstruct.2017.03.003.Effects of aging in dry environment on physical and mechanical properties of a cold-curing structural epoxy adhesive for bridge construction
Construction and Building Materials. 2017. DOI : 10.1016/j.conbuildmat.2017.02.063.Ductility, recovery and strain rate dependency of an acrylic structural adhesive
Construction and Building Materials. 2017. DOI : 10.1016/j.conbuildmat.2017.02.101.Pull-Out Behavior of CFRP Single-Strap Ground Anchors
Journal of Composites for Construction. 2017. DOI : 10.1061/(Asce)Cc.1943-5614.0000760.Integration of dye solar cells in load- bearing translucent glass fiber- reinforced polymer laminates
Journal of Composite Materials. 2017. DOI : 10.1177/0021998316656393.Creep of Sandwich Panels with Longitudinal Reinforcement Ribs for Civil Engineering Applications: Experiments and Composite Creep Modeling
Journal of Composites for Construction. 2017. DOI : 10.1061/(Asce)Cc.1943-5614.0000735.Aramid/glass fiber-reinforced thermal break - Structural system performance
Composite Structures. 2016. DOI : 10.1016/j.compstruct.2016.05.038.Energy dissipation and recovery in web-flange junctions of pultruded GFRP decks
Composite Structures. 2016. DOI : 10.1016/j.compstruct.2016.03.042.Effect of service temperature on the shear creep response of rigid polyurethane foam used in composite sandwich floor panels
Construction and Building Materials. 2016. DOI : 10.1016/j.conbuildmat.2016.05.074.Effect of service temperature on the flexural creep of vacuum infused GFRP laminates used in sandwich floor panels
Composites Part B. 2016. DOI : 10.1016/j.compositesb.2015.12.027.Experimental and numerical investigation of tensile behavior of non-laminated CFRP straps
Composites Part B. 2016. DOI : 10.1016/j.compositesb.2016.01.049.Experimental characterization of longitudinal mechanical properties of clear timber: Random spatial variability and size effects
Construction and Building Materials. 2016. DOI : 10.1016/j.conbuildmat.2016.05.109.Effect of Natural Weathering on Durability of Pultruded Glass Fiber-Reinforced Bridge and Building Structures
Journal of Composites for Construction. 2016. DOI : 10.1061/(Asce)Cc.1943-5614.0000589.Aramid/glass fiber-reinforced thermal break - thermal and structural performance
Composite Structures. 2016. DOI : 10.1016/j.compstruct.2015.10.001.Post-wrinkling behavior of webs in GFRP cell-core sandwich structures
Composite Structures. 2016. DOI : 10.1016/j.compstruct.2015.11.025.Random field-based modeling of size effect on the longitudinal tensile strength of clear timber
Structural Safety. 2016. DOI : 10.1016/j.strusafe.2015.09.002.Connection systems between composite sandwich floor panels and load-bearing walls for building rehabilitation
Engineering Structures. 2016. DOI : 10.1016/j.engstruct.2015.10.036.System transverse in-plane shear stiffness of pultruded GFRP bridge decks
Engineering Structures. 2016. DOI : 10.1016/j.engstruct.2015.11.003.Teaching & PhD
Teaching
Architecture