Non-Linear Dynamic Soil‐structure Interaction Analysis of Buildings

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.

Influence of Soil-Structure Interaction on the Seismic Response of the Structure on Mat Foundation

“…The numerical methods of direct approach like finite element method (FEM), spectral element method (SEM) and boundary element method (BEM) is currently used methods for SSI analysis. Hessam et al and Gouasmia et al showed the importance of considering nonlinear SSI effects in finite element (FE) approach of SSI [8,9]. Omar et al showed FE method for better response than experimental methods and the numerical methods are best suitable for dynamic problems [10].…”

Seismic Soil-Structure Interaction of a Masonry Structure: Sungurbey Mosque

“…It will change free-field ground motion. Studies on soil-structure interaction were conducted by several researchers [21][22][23][24][25][26][27]. Ivanovic [23] performed 3D finite element analysis of a seven-story reinforced concrete building supported by the piled foundation on loose soil.…”

“…A set of factors depending on the structural abrasion of masonry foundations were proposed utilizing 2D FEM models [26]. Gouasmia et al [27] developed analytical models of a 5 story reinforced concrete building to investigate soil-structure interaction. Allowing the structure to slide or uplift has not changed on measured acceleration or displacement whereas the base shear and overturning moments reduced 74%.…”

Direct Approach to Seismic Soil – Structure–Interaction Analysis – Building Group Case

“…One of the most important aspects of structural analysis is soil-structure interaction (SSI). Such interaction may alter the dynamic characteristics of structures and consequently may be beneficial or detrimental to the performance of structures (Gouasmia, Djeghaba 2007).…”

“…The main idea behind this investigation is motivated by the fact that there is still great uncertainty as to the significance of seismic soil-structure interaction (SSI) for ordinary structures typically encountered in Algeria (Gouasmia, Djeghaba 2005). There may be both beneficial and adverse effects of SSI.…”