Numerical investigation of potential foundation intervention as a means for mitigating seismic risk

E. Kirtas*, E. Rovithis, K. Pitilakis, A. Sextos

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

Interventions at the foundation and the surrounding soil of existing buildings are commonly employed as a means to increase the foundation-soil system resistance and/or reduce excessive ground deformations under strong ground shaking. However, current research has highlighted the potential to improve the seismic performance of buildings by mitigating the imposed earthquake loading that is transmitted through the foundation. The scope of the present paper therefore, is to investigate whether such a potential modification of the soil-structure system dynamic characteristics could result to the upgrade of seismic safety while investigating the physical mechanisms that describe the behavior of the coupled SSI system. The examined foundation intervention methods include both commonly applied construction techniques, such as diaphragm walls and soil stiffening, as well as more innovative methods implementing low shear strength materials that are injected within the soil mass. All these solutions are studied with the use of advanced numerical tools through extensive experimental validation and parametric analyses that aim at investigating a specific beneficial or detrimental trend for various combinations of earthquake scenarios, soil conditions and SDOF and MDOF structural characteristics. The numerical analysis results derived reveal that, notwithstanding the significant complexity of the problem, particular interventions could potentially mitigate the imposed earthquake input, thus improving the anticipating building seismic performance under certain conditions.

Original languageEnglish
Title of host publication8th US National Conference on Earthquake Engineering 2006
Pages6376-6385
Number of pages10
Volume11
Publication statusPublished - 2006
Event8th US National Conference on Earthquake Engineering 2006 - San Francisco, CA, United States
Duration: 18 Apr 200622 Apr 2006

Conference

Conference8th US National Conference on Earthquake Engineering 2006
CountryUnited States
CitySan Francisco, CA
Period18/04/0622/04/06

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