地震荷载作用下水电站厂房结构的振动应力分析  

Vibration Stress Analysis of Powerhouse Subjected to Earthquake Motion

作　　者：张存慧[1] 马震岳[1] 张运良[1] 贠杰 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116023 [2]内蒙古自治区水利水电勘测设计院,内蒙古呼和浩特010020

出　　处：《水电能源科学》2009年第5期94-96,共3页Water Resources and Power

基　　金：国家自然科学基金资助项目(50679009;50809013);大连理工大学青年教师培养基金资助项目(893219)

摘　　要：结合三峡右岸电站某机组段建立了三维数值计算模型,采用有限元与无限元耦合系统模拟水电站厂房结构无限域地基问题并应用时间历程分析法进行地震荷载作用下的动力响应计算。在蜗壳结构外围混凝土发生塑性损伤的基础上,分析了电站厂房在地震动荷载激励下各部位混凝土结构、流道系统金属结构的振动应力峰值。结果表明,地震荷载作用下混凝土结构的振动应力水平较低,对混凝土动力强度复核影响不明显,流道系统金属结构的振动应力水平较低,不会发生因强度不足而引起的破坏。3-D FE-IE model （3-D finite element and infinite element coupling model） for the hydropowerhouse in the Three Gorges Hydropower Project is set up in utilizing infinite element to model the characteristic of unbounded media. The seismic response of the hydropowerhouse is studied by time-history analyzed method. On the basis that plasticity damage may take place in the concrete surrounding the spiral case, the vibration stresses of concrete and metal parts of the combined structure under earthquake loads were studied numerically. Results show that the maximum vibration stress of concrete and metal parts was low. The destruction will not take place because the intensity is insufficient.

关 键 词：水工结构 振动应力 时间历程分析法 电站厂房 地震荷载 

分 类 号：TV713[水利工程—水利水电工程] TV311