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Parallel computation of seismic analysis of high arch dam
Chen Houqun (³ÂºñȺ)¹, Ma Huaifa (Âí»³·¢)¹, Tu Jin (Í¿¾¢)¹,Cheng Guangqing (³É¹ãÇì)² and Tang Juzhen (ÌƾÕÕä)²

1. China Institute of Water Resources and Hydropower Research (IWHR), Beijing 100044, China
2. Beijing FEGEN Software Co., Ltd., Beijing 100086, China

Abstract:  Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams (ADs), based on the Parallel Finite Element Program Generator (PFEPG). The computational algorithms of the numerical simulation of the meso-structure of concrete specimens were studied. Taking into account damage evolution, static preload, strain rate effect, and the heterogeneity of the meso-structure of dam concrete, the fracture processes of damage evolution and configuration of the cracks can be directly simulated. In the seismic response analysis of ADs, all the following factors are involved, such as the nonlinear contact due to the opening and slipping of the contraction joints, energy dispersion of the far-field foundation, dynamic interactions of the dam-foundation-reservoir system, and the combining effects of seismic action with all static loads. The correctness, reliability and efficiency of the two parallel computational programs are verified with practical illustrations.

Keywords:   high arch dam; contraction joints; random aggregate model; nonlinear seismic response; parallel computation