河床式水电站厂房结构的地震响应分析方法研究

以某河床式水电站工程为例,在分析厂房整体结构特点的基础上,建立了三维有限元模型,并应用《水工建筑物抗震设计规范》(DL 5037-2000)和《欧洲结构抗震设计规范》(Eurocode 8)中三种不同的反应谱,进行了河床式水电站厂房结构的地震响应分析。将设计反应谱转换成20s的人造地震波,通过时程分析,对反应谱分析得到的结构应力和位移状况进行验证对比,讨论在规范规定的不同反应谱分析方法下河床式水电站厂房结构地震响应的异同。期待研究成果可以为我国抗震规范的修订提供部分借鉴。

Research on Seismic Response Analysis Method of the Run-of-river Hydropower Station

Based on the analysis of structural characteristics of a run-of-river hydropower station, the finite element analysis software Ansys was used to build a three-dimensional structural model to analyze the seismic response of the run-of-river hydropower station. Three different response spectrums from both the European code, Eurocode 8, and the Chinese Code, Specifications for Seismic Design of Hydraulic Structures (DL 5037-2000) were applied. The dynamic behaviors of the structure under earthquake loads were investigated using the time history analysis during the 20-seconds artificial seismic wave which was extracted from the elastic response spectrum. After analyzing and comparing the stresses and displacements of the powerhouse structure which were achieved from different calculation theories under the seismic loading condition, the main characteristics of the run-of-river hydropower stations during earthquake activities were illustrated and some suitable suggestions for seismic analysis were provided.