摘要
绵竹体育中心体育馆屋盖是一支撑在下部混凝土框架结构上的大跨度空间管桁架结构,并在下弦管内张拉预应力索。利用SAP 2000对屋盖结构进行承载力计算、动力特性分析、线性屈曲分析、非线性极限承载力分析,对关键节点进行有限元分析,并与不采用预应力的模型进行横向对比。分析表明:采用下弦管内张拉预应力的管桁架能很好地解决水平推力及竖向挠度较大的问题,同时满足结构设计及建筑外观要求。
Steel roof of Mianzhu sport center Gymnasium is a long span spatial pipe truss steel structure supported on the bottom concrete frame structure,with prestressed in the truss＇ s bottom chord pipe.SAP 2000is used for analyzing the bearing capacity,dynamic performance,buckling performance and nonlinear ultimate bearing capacity.Key joint is also analyzed.A comparison is given between the model with and without prestress.The analysis shows that with prestress in bottom chord pipe,the roof can works with small horizontal push force and vertical deformation,which can match structure design and architecture outlook requirement.
出处
《钢结构》
2013年第9期31-34,38,共5页
Steel Construction
关键词
钢屋盖
管桁架
预应力
屈曲分析
节点分析
steel roof
pipe truss
prestress
buckling analysis
joint analysis
