不同边界条件下抽水蓄能电站地下厂房地震动响应分析  

Seismic Response Analysis of Pumped Storage Plant Underground Powerhouse Based on Different Boundary Conditions

作　　者：陶永霞[1] 职保平[2] 蒋莉 李强 张程 TAO Yong-xia;ZHI Bao-ping;JIANG Li;LI Qiang;ZHANG Cheng(a. Department of International Education;lb. School of Water Conservancy and Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475004, Chin;2. School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, Chin;3. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]黄河水利职业技术学院国际教育学院,河南开封475004 [2]黄河水利职业技术学院水利工程学院,河南开封475004 [3]华北水利水电大学水利学院,河南郑州450045 [4]大连理工大学建设工程学部,辽宁大连116024

出　　处：《水电能源科学》2018年第7期79-82,共4页Water Resources and Power

基　　金：河南省基础与前沿技术研究项目(142300410176;162300410053);河南省高等学校青年骨干教师资助计划项目(2015GGJS-102);河南省科技攻关计划项目(162102210074);河南省高等学校重点科研项目资助计划(17A570006);华北水利水电大学青年创新人才计划(70421)

摘　　要：随着抽水蓄能电站运行水头和转速的不断提高,边界条件对厂房结构震动影响问题日益突出。为此,以某抽水蓄能电站地下厂房为例,通过建立其有限元三维模型,利用振型分解反应谱分析方法分析了不同边界条件下厂房的抗震性能,研究了地震情况下四种不同边界条件下厂房主要结构的反应特性。结果表明,是否考虑围岩对地下厂房稳定性并无很大影响,顺河向地震荷载对厂房作用影响很小;考虑粘弹性边界条件对顺河向地震波有一定放大作用,不可忽略,而叠加后的总位移值相对无质量边界条件有一定比例下降,下部结构有一定比例上升。研究结果为厂房抗震结构设计与安全分析提供了依据。With the increasing of operation head and rotating speed of the pumped storage power station, the influence of boundary condition on the vibration of powerhouse structure becomes increasingly prominent. Therefore, taking under ground powerhouse of a pumped-storage power station as an example, a three-dimensional model was established and the mode-superposition response spectrum analysis method was used to analyze the seismic performance of the powerhouse under different boundary conditions. The response characteristics of the main powerhouse structures of the four different boundary conditions under earthquake conditions were analyzed. The results show that whether or not considering sur- rounding rock does not have a great influence on the stability of the underground powerhouse. The downstream directional seismic load has little impact on the powerhouse. Considering the viscous-spring boundary conditions has a certain ampli- fication effect on the downstream directional seismic waves and it can not be ignored. However, the total displacement after the superposition of the viscous-spring boundary condition is smaller than the non-mass boundary condition, but it is larger on the substructure. The research provide scientific basis for the powerhouse＇s anti-earthquake design and safety analysis.

关 键 词：不同边界 抽水蓄能电站 粘弹性边界 地下厂房 地震动响应 

分 类 号：TV312[水利工程—水工结构工程]