Dynamic response of a group of flexible foundations to incident seismic waves |
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| Authors: | LG Tham J Qian YK Cheung |
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| Institution: | aDepartment of Civil and Structural Engineering, University of Hong Kong, Hong Kong;bInstitute of Engineering Structures, Tongji University, Shanghai, China |
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| Abstract: | The dynamic response of a finite number of flexible surface foundations subjected to harmonic incident Rayleigh or SH waves is presented. The foundations are assumed to be resting on an elastic half-space. The results show that the foundation stiffness has a marked effect on the vertical response, while there is only a minor effect on the horizontal displacements. In general, the dynamic response decreases with increasing foundation stiffness. In cases of Rayleigh wave incidence, the existence of an adjacent foundation generates a certain amount of horizontal response in the direction perpendicular to the incident wave and subsequently causes the system to undergo a torsional motion; while in cases of horizontally incident SH waves, a vertical response has been observed and its magnitude is comparable to the response in the direction of the incident wave. |
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| Keywords: | flexible surface foundation dynamic soil-foundation interaction harmonic seismic waves boundary elements finite elements |
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