方钢管梯形屋架次应力分析  

ANALYSIS OF THE SECONDARY STRESS OF SQUARE STEEL TUBE TRAPEZOID ROOF TRUSS

作　　者：房鹏鹏[1] 冯东[1] 

机构地区：[1]北京交通大学,北京100044

出　　处：《钢结构》2007年第1期31-33,共3页Steel Construction

摘　　要：运用有限元软件ANSYS,对在编制《方钢管屋架国家标准图集》过程中遇到的次应力问题进行分析。对其中21m和30m两种跨度中的1、4、6三个荷载等级的屋架进行建模计算,得出其次应力的大小、所占比例以及随跨度、荷载等级等因素变化的趋势,并给出次应力的处理方法。For solving the problem of the secondary stress of square steel tube trapezoid roof truss when compiling national standards drawings, the finite element analysis program ANSYS is used to calculate and analyze. The roof trusses with load grade-1 ,load grade-4 and load grade-6 of the 21-metre span and the 30-metre span are calculated by modeling, then the secondary stress level and proportion are given and the variable trend with the span and load grade is also obtained, moreover the method to deal with secondary stress is provided.

关 键 词：方钢管屋架 次应力 刚性节点 

分 类 号：TU392.3[建筑科学—结构工程]