NON-LINEAR DYNAMIC SOIL‐STRUCTURE INTERACTION ANALYSIS OF BUILDINGS

Abdelhacine Gouasmia,Kamel Djeghaba

doi:10.3846/13928619.2007.9637811

Abdelhacine Gouasmia, Kamel Djeghaba

Open Access

https://doi.org/10.3846/13928619.2007.9637811

Copy DOI

Abstract

The objective of this research is to evaluate the effects of soil‐structure interaction (SSI) on the modal characteristics and on the dynamic response of structures. The stress had an impact on the overall behaviour of five storeys reinforced concrete (R/C) buildings typically encountered in Algeria. Sensitivity studies are undertaken in order to study the effects of frequency content of the input motion, frequency of the soil structure system, rigidity and depth of the soil layer on the dynamic response of such structures. This investigation indicated that the rigidity of the soil layer is the predominant factor in soil‐structures interaction and its increases would definitely reduce the deformation of the R/C structures. On the other hand, increasing the period of the underlying soil will cause an increase in the lateral displacements at storey levels and create irregularity in the distribution of storey shears. Possible resonance between the frequency content of the input motion and soil could also play an important role in increasing the structural response.

Highlights

The Algerian earthquake of magnitude Mw6.8 which struck Boumerdes-Algiers on May 21, 2003, is considered among the largest earthquakes to have occurred in the region since the El-Asnam earthquake (Ms7.3 in 1980) [1]
Soil conditions in the Boumerdes region are suspected to have played a role in the amplification of earthquake input motions
In this respect, taking advantage of the new and emerging concept of seismic structural design, the so-called performance-based Design (PBE), a careful consideration of all aspects involved in structural analysis is performed

Summary

Introduction

The Algerian earthquake of magnitude Mw6.8 which struck Boumerdes-Algiers on May 21, 2003, is considered among the largest earthquakes to have occurred in the region since the El-Asnam earthquake (Ms7.3 in 1980) [1]. It caused important damages in the Boumerdes region, where many buildings collapsed totally and many of them have been seriously damaged. Soil conditions in the Boumerdes region are suspected to have played a role in the amplification of earthquake input motions In this respect, taking advantage of the new and emerging concept of seismic structural design, the so-called performance-based Design (PBE), a careful consideration of all aspects involved in structural analysis is performed. Not taking into account these structural response amplifications may lead to an under-designed structure resulting in a premature collapse during an earthquake

Objectives

Methods

Conclusion