随机地震作用下特高压换流站阀厅非线性动力可靠度研究  

Nonlinear dynamic reliability study of valve hall of UHV converter station under random earthquake actions

作　　者：邓夕胜[1] 牟淼 唐煜[1] DENG Xisheng;MOU Miao;TANG Yu(School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu,610500,China;State Grid Chengdu Power Supply Company,Chengdu 610041,China)

机构地区：[1]西南石油大学土木工程与测绘学院,四川成都610500 [2]国网成都供电公司,四川成都610041

出　　处：《世界地震工程》2021年第2期173-182,共10页World Earthquake Engineering

基　　金：国家自然科学基金青年基金项目(51808470)。

摘　　要：通过模态分析研究了抗震设防烈度为8度(0.3g)的混合结构与全钢结构两种阀厅结构方案的动力特性,基于地震动的地震学模型与概率密度演化法分析了全钢阀厅的非线性随机动力可靠度,根据阀厅角柱柱顶位移响应得到了全钢阀厅动力影响的概率密度曲面及典型时刻的概率密度曲线。研究结果表明:阀塔对结构整体刚度影响较小,工程中可采用无阀模型进行简化计算;高烈度设防地区,推荐采用结构布置相对规则的钢结构方案;随机动力分析相比于确定性分析更能反应地震作用下阀厅动力响应的客观规律;阀厅钢结构方案在罕遇地震作用下可靠度较高,结构安全可靠。The dynamic characteristics of the composite structure and steel structure with seismic fortification intensity of 8 degrees(0.3g)are studied through modal analysis,and then the nonlinear random dynamic reliability of steel valve hall is analyzed based on the ground motion model and probability density evolution method,and according to the displacement response of the corner column top of steel valve hall,the probability density surface and the probability density curve of typical time are obtained.The research shows that the valve tower has little influence on the overall stiffness of the structure,and the model without valves can be used to simplify the calculation in the analysis of the main structure in practical engineering.The steel structure scheme with relatively regular structure layout is recommended in high seismic intensity area.Compared with deterministic analysis,stochastic dynamic analysis can better reflect the objective law of dynamic response of valve hall under earthquake action.The steel structure scheme of valve hall has high reliability and safety under the action of rare earthquake.

关 键 词：阀厅 动力特性 概率密度演化法 可靠度 

分 类 号：TU311.3[建筑科学—结构工程]