3D Valley Site Effect on the Nonlinear Seismic Response of Earth Dam

Yong Qiang Li; Li Ping Jing; Hai An Liang; Yan Zou; Wei Feng Sun

doi:10.4028/www.scientific.net/AMM.353-356.1806

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 353-3563D Valley Site Effect on the Nonlinear Seismic...

3D Valley Site Effect on the Nonlinear Seismic Response of Earth Dam

Abstract:

A three dimensional numerical model for a typical earth dam and its valley site was established and the nonlinear seismic response of this model was performed. Experimental data of cyclic triaxial tests were adopted to determine the curves of modulus ratio and damping ratio that vary with dynamic strain amplitude. Free-field artificial boundary and viscous artificial boundary were employed and the input waves were the revised ground motions obtained from the station near the dam. Distributions of the PGA, displacement, residual deformation, shear strain increment and element failure state were presented. Results demonstrate that the 3D local valley site effect has a significant influence on the seismic response of earth dam.