摘要
以某500 k V变电站中典型的钢结构变电构架为基础,建立符合实际的单侧支撑双跨人字形变电构架模型,采用ANSYS软件对构架进行了动力特性分析和弹塑性动力时程分析,了解了构架在不同损伤程度下的抗震承载力特点。研究表明:变电构架支柱对于损伤非常敏感,支柱的损伤会严重削弱变电构架的侧向刚度,在实际工程中可以通过检测构架动力特性改变的程度来定性判断其损伤程度。与无损变电构架相比,受损构架在不同地震动作用下,应力水平均有所增加,而且随着损伤程度的增加,杆件应力水平增加愈多,说明损伤加剧了构架发生地震破坏的危险,在实际工程中应加强监测和维护。
Based on a 500 kV steel substation framework as an example, the models of unilateral support substation framework were established. Using ANSYS software to establish the finite element model, the nonlinear time - histo- ry analysis was carried out to evaluate the seismic performance of damaged steel substation framework. The results show that the substation frame pillars are stiffness of the substation frame. It detect Compared with the undamaged substation age degree. Pillar damages increased the ened in practice. very sensitive to damage. Pillar damages will seriously weaken the lateral the dynamic characteristics of the frame to determine its damage degree. framework, the damaged risk of structural failure. member stress increase with the increase of dam- Monitoring and maintenance should be strength-
出处
《世界地震工程》
CSCD
北大核心
2016年第2期31-37,共7页
World Earthquake Engineering
关键词
钢结构变电构架
损伤
动力特性
时程分析
steel substation framework
damage
dynamic characteristics
time - history analysis
