关键词: 非均质场地, EPR核电厂, 循环水泵房, 静动力分析, 地基安全性, 捕虏岩体

Abstract: EPR nuclear power plant circulation water pump house(HPX) which is the seismic 1 item supplies water for circulating cooling water (CRF) system. So the influence of heterogeneity is particularly important in the site foundation. Based on the actual conditions of a domestic nuclear power plant site, a three dimensional finite element model of the pump house foundation is established by ANSYS platform. And the mechanical properties and spatial distribution pattern of xenoliths are simulated in detail. The static and dynamic time history analysis method is proposed based on Newmark method. This method can be used to comprehensively evaluate the vertical deformation of the foundation, bearing capacity, the base of the bottom surface rate, anti-sliding and anti-overturning stability, etc. The results of analysis show that, in the distribution of the site under practical, the existence of xenoliths has a little influence on the safety of pumping house foundation. Part compressive stress out of specification has no influence on overall stability. The foundation does not need to be processed because the index of the evaluation can meet the requirements of the specification. At the same time, the calculated results also verify reliability and good engineering applicability of the Static-Dynamic coupling analysis model. The model has the potential to solve the nonlinear dynamic problem of the complex nuclear power structure, with the combination of the ANSYS which has rich unit model and the capacity of nonlinear analysis.

Key words: heterogeneous site, epr nuclear power plant, circulation water pump house, static-dynamic coupling analysis, foundation safety, xenolith