摘要
火力发电厂作为生命线工程,地震时要求其使用功能不可中断或需尽快恢复,从而为抗震救灾和灾后重建提供有力的支持和保障。因此,火力发电厂结构的抗震性能及经济性一直备受关注。在传统钢结构电力主厂房中引入防屈曲支撑以提高抗震性能,同时采用高强钢以减少钢材用量。采用SAP2000有限元分析软件对某钢结构火力发电厂置换防屈曲支撑及高强钢柱前后进行多遇地震下弹性分析及罕遇地震作用下弹塑性动力时程分析,从结构自振周期、底部剪力、用钢量、层间位移角、塑性铰分布等角度,探讨防屈曲支撑及高强钢在钢结构火力发电厂中应用的优势。
Due to vital importance in providing sufficient electricity,thermal power plant is supposed to be functional even in an earthquake,for rescue and reconstruction.Therefore,the seismic behavior of power plants is always a concern.In this paper,Buckling Restrained Brace(BRB)and high strength steel columns are applied in the design of a traditional steel frame structure of thermal power plant.In order to evaluate seismic behavior and economical efficiency of this design,both elastic analyses under frequently occurred earthquake and elasto-plastic time-history analyses under rarely occurred earthquake are performed using finite element analysis(FEA)software SAP 2000.The advantages of BRB and high strength steel are demonstrated through a comparison of natural period,base shear force,inter-story drift,steel usage and distribution of plastic hinges.
出处
《建筑钢结构进展》
北大核心
2013年第5期41-47,53,共8页
Progress in Steel Building Structures
关键词
防屈曲支撑
高强钢
电力厂房
弹塑性时程分析
BRB
high strength steel
thermal power plant
elasto-plastic time-history analysis
