Seismic soil-structure interaction and the nonlinear response of shallow foundations
Event details
| Date | 18.12.2015 |
| Hour | 12:15 › 13:15 |
| Speaker | Dr António A. Correia, Researcher at Earthquake Engineering and Structural Dyanmics, Portuguese National Laboratory for Civil Engineering (LNEC), Lisbon, Portugal |
| Location | |
| Category | Conferences - Seminars |
The interaction between a superstructure, its foundation and the supporting terrain may have a strong influence on the seismic response of structures. An overview of soil-structure interaction (SSI) phenomena and effects in the linear elastic range will pave the way for a presentation of recent research work that contributes to clarify the effects of nonlinear dynamic interaction on the seismic response of soil-foundation-superstructure systems. Such work includes several experimental results of seismically loaded structures on shallow foundations.
Theoretical advancements are also presented, in relation to macro-element numerical modelling of the soil-foundation system. These macro-element models represent the nonlinear soil behaviour at near-field and the ground substratum dynamic characteristics at far-field, as well as the interaction with the seismic response of the structure. All aspects of elastic and inelastic behaviour of the foundation system are thus encompassed into one computational entity and are described by the behaviour of a single point at the centre of the foundation.
These developments are then used for supporting the concept of a controlled share of ductility demand between the superstructure and the foundation as a key ingredient for a rational and integrated approach to seismic design of foundations and structures. This design methodology is briefly introduced and validated. Finally, an application example to an outstanding structure is presented.
Bio : After graduating in Civil Engineering at the Technical Univ. of Lisbon, Portugal, António A. Correia had a challenging experience as a professional engineer in design companies and lecturer at different universities which led him to further specialize in both Structures and Geotechnics. This path eventually resulted in a PhD in Earthquake Engineering on the topic of SSI at the UME School, IUSS Pavia, Italy.
He is currently a Researcher at the Earthquake Engineering and Structural Dynamics Unit of the Portuguese National Laboratory for Civil Engineering (LNEC), where he conducts shake table tests and structural vulnerability and risk studies, alongside a continued activity on the development of advanced numerical models. He also serves as Technical Secretary at Sub-Commission 8 (Eurocode 8) of Technical Committee 250 (Structural Eurocodes) of the European Standardization Committee (CEN/TC250/SC8).
His main expertise research and interests are in the fields of experimental assessment and numerical modelling of the seismic response of structures, as well as on seismic risk, structural vulnerability and design code developments.
Theoretical advancements are also presented, in relation to macro-element numerical modelling of the soil-foundation system. These macro-element models represent the nonlinear soil behaviour at near-field and the ground substratum dynamic characteristics at far-field, as well as the interaction with the seismic response of the structure. All aspects of elastic and inelastic behaviour of the foundation system are thus encompassed into one computational entity and are described by the behaviour of a single point at the centre of the foundation.
These developments are then used for supporting the concept of a controlled share of ductility demand between the superstructure and the foundation as a key ingredient for a rational and integrated approach to seismic design of foundations and structures. This design methodology is briefly introduced and validated. Finally, an application example to an outstanding structure is presented.
Bio : After graduating in Civil Engineering at the Technical Univ. of Lisbon, Portugal, António A. Correia had a challenging experience as a professional engineer in design companies and lecturer at different universities which led him to further specialize in both Structures and Geotechnics. This path eventually resulted in a PhD in Earthquake Engineering on the topic of SSI at the UME School, IUSS Pavia, Italy.
He is currently a Researcher at the Earthquake Engineering and Structural Dynamics Unit of the Portuguese National Laboratory for Civil Engineering (LNEC), where he conducts shake table tests and structural vulnerability and risk studies, alongside a continued activity on the development of advanced numerical models. He also serves as Technical Secretary at Sub-Commission 8 (Eurocode 8) of Technical Committee 250 (Structural Eurocodes) of the European Standardization Committee (CEN/TC250/SC8).
His main expertise research and interests are in the fields of experimental assessment and numerical modelling of the seismic response of structures, as well as on seismic risk, structural vulnerability and design code developments.
Practical information
- General public
- Free
Organizer
- Prof. Dr Brice Lecampion & Katrin Beyer
Contact
- Dr João Almeida (Postdoctoral Researcher at EESD, EPFL)