Soil structure interaction

About: Soil structure interaction is a research topic. Over the lifetime, 3653 publications have been published within this topic receiving 48890 citations.

Damage Analysis of Structures on Elastic Foundation

Abstract: A performance-based design methodology is aimed at controlling the structural damage based on precise estimations of the seismic response of the whole building–foundation system. This work presents a simplified procedure for practical damage analysis of structures considering the soil–structure interaction effects, with potential application to performance-based design of new buildings as well as to performance-based evaluation of existing buildings. A damage model based on maximum displacement and dissipated energy under monotonic loading is proposed, with the effects of cyclic load reversals being estimated by using a modified Park–Ang index. To simplify the consideration of the soil–structure interaction effects, an equivalent fixed-base oscillator with the same yield strength and energy dissipation capacity as the actual flexible-base structure is applied. Selected numerical results are presented in terms of dimensionless parameters for their general application, using a set of appropriate earthquake ...

Dynamic soil-structure interaction

Abstract: THE EFFECT OF SOIL-STRUCTURE INTERACTION ON THE STRUCTURAL RESPONSE TO EARTHQUAKE MOTION IS ANALYZED. THE STRUCTURE IS MODELED BY A ONE DEGREE-OF-FREEDOM SYSTEM RESTING ON AN ELASTIC HALF SPACE. THE SOIL IS THEN APPROXIMATED BY SIMPLE MASS-SPRING DASHPOT SYSTEMS USING THE SOLUTIONS OBTAINED BY BYCROFT FOR THE SOIL COMPLIANCES. THE RESULTING DYNAMIC MODEL IS EXPRESSED BY NONDIMENSIONAL PARAMETERS. EMPHASIS IS PUT ON THE PHYSICAL MEANING OF THESE PARAMETERS IN ORDER TO OBTAIN RESULTS THAT CAN BE APPLIED TO PRACTICAL DESIGN. A PROBABILISTIC, RATHER THAN A DETERMINISTIC APPROACH IS USED. THE INPUT MOTION IS FIRST ASSUMED A WHITE NOISE PROCESS, AND THE MAXIMUM RESPONSE IS REPLACED BY THE RMS RESPONSE. SUBSEQUENTLY A SET OF ARTIFICIAL RECORDS IS USED AND THE AVERAGE MAXIMUM RESPONSE IS OBTAINED. THE CONCLUSIONS ARE THAT THE PHENOMENON USUALLY HELPS OR IS NEGLIGIBLE IN ACTUAL CASES. FOR SOME SPECIAL CONDITIONS, HOWEVER, THERE CAN BE AN AMPLIFICATION IN THE STRUCTURAL RESPONSE. THIS AMPLIFICATION IS NEVER LARGER THAN ABOUT 20 PERCENT.

Modelling of acoustic and elastic wave propagation from underground structures using a 2.5D BEM-FEM approach

Abstract: This paper presents a numerical method based on a two-and-a-half dimensional (2.5D) boundary element-finite element (BEM-FEM) coupled formulation to study noise and vibration from underground structures. The proposed model properly represents the soil-structure interaction problem and the radiated noise and vibration. The soil is modelled with the boundary element method, and the Green's function for a fluid-solid formation is taken as the fundamental solution to represent a solid half-space flattened by a fluid medium, which represents the soil and the air above the ground surface. The finite element method is used to represent structures and enclosed air volumes. The problem representation is limited to a soil-structure interface and the ground surface does not need to be discretised. Radiated noise and vibration are determined after the soil-structure interaction problem has been solved. We verify the proposed method by comparing the solution with an analytical solution for the wave propagation in a fluid-solid medium. Three examples are given to illustrate the noise and vibration radiated by tunnels. The results show that the soil-structure interaction influences the sound pressure field above the ground surface.