Horizontal impedance of square foundation in layered soil |
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Authors: | S Ahmad A K Rupani |
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Institution: | Department of Civil Engineering, 239 Ketter Hall, State University of New York at Buffalo, Amherst, 14260 NY, USA |
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Abstract: | This paper presents an extensive investigation into the influence of key mechanical and geometrical parameters on horizontal impedance of square foundations resting on or embedded in a two-layer soil deposit. The parameters investigated are the ratio of shear-wave velocities, the thickness of the top layer, the depth of embedment and the degree of contact between the footing-sidewall with backfill-soil. The results are presented in the form of simple and versatile dimensionless graphs, which should prove to be useful in understanding the steady-state harmonic response of square foundations in layered soils due to horizontal excitation. The investigation was conducted using a rigorous boundary element algorithm incorporating isoparametric boundary elements. Higher order quadratic elements were used since they can model the wavy nature of the dynamic problem investigated more accurately. |
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Keywords: | square foundation dynamic response horizontal impedance foundation vibration dynamic BEM layered soil soil– structure interaction |
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