Evaluation of seismic reliability of gravity dam-reservoir-inhomogeneous foundation coupled system

Abstract

The seismic performance of gravity dam-reservoir-foundation coupled system is investigated utilizing probabilistic approach. In this research, the uncertainties associated with modeling parameters are incorporated in nonlinear response history simulations to realistically quantify their effects on the seismic performance of the system. The methodology is applied to Pine Flat gravity dam and the foundation is considered to be inhomogeneous assuming a constant spatial geometry but with various rock material properties. The sources of uncertainty are taken into account in the reliability analysis using Latin Hypercube Sampling procedure. The effects of the deconvolution process, number of samples, and foundation inhomogeneity are investigated.

Keywords

gravity dams / dam-reservoir-foundation interaction / seismic reliability / inhomogeneous foundation / earthquake deconvolution

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