摘要
目的分析汶川大地震中大量遭受破坏的变电站电气设备的地震易损性和震害机理.方法通过建立软母线连接的变电站开关设备耦联体系的有限元分析模型,采用非线性的索单元模拟软母线的作用.在实际记录的汶川地震波输入下,对耦联体系有限元模型进行了地震时程分析,对比了结构地震响应计算结果.结果隔离开关有母线连接瓷柱和无母线连接瓷柱的响应差别很大,母线对设备的响应影响是比较大的,它是导致设备发生破坏的重要原因.由于母线的存在,母线连接设备体系的结构响应呈现非线性的特点.结论变电站电气设备是典型的地震易损结构,在设备的抗震分析中需要考虑母线的耦联作用.
Many substation equipments were damaged during Wenchuan Earthquake, May 12th, 2008. In order to analyze seismic vulnerability and failure mechanism, finite element model of substation switch equipments interconnected by flexible bus was established, in which the cable element was used to simulate the flexible bus. Under the input of recorded Wenchuan Earthquake ground motions, time history analysis was made and the seismic responses were compared using the FEM model. The results show that the structural responses of the bus connected equipments are different from that of the independent equipments, which indicates that the influence of flexible bus on equipments cannot be ignored. Tension transmission through the flexible bus is one of the main reasons to cause seismic failure of some equipment and it should be considered in the seismic design of substation equipments interconnected by flexible bus.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2009年第6期1050-1057,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
教育部霍英东教育基金会优选资助课题(114021)
国家电网公司科技项目(SGKJJSKF2008-508)
关键词
变电站设备
汶川地震
破坏机理
有限元分析
substation equipments
Wenchuan Earthquake
failure mechanism
finite element analysis
