平面非对称钢框架结构在水平荷载下的极限承载力估计  

Estimation of Ultimate Resistant Capacity of Non-Symmetric Planar Steel Frame Structures under Horizontal Load

作　　者：王翼[1] 李国强[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2009年第1期26-29,共4页Structural Engineers

摘　　要：平面不规则框架结构由于外力作用中心和刚度中心的不重合,会产生扭转,使得部分框架的承载力不能充分发挥。提出了一种塑性设计中对于钢框架结构整体水平极限承载力的简化估计方法,给出了完整的计算过程、公式和示意图,应用有限元分析软件ANSYS对9个框架进行了分析,给出这种框架水平承载力以及相应的结构层间变形的有限元分析和简化估计结果,并进行比较,证明此简化估计方法能给出较好和偏于安全的结果。The force center and the stiffness center of the plane irregular frame are not coincidence, it will cause torsion which will limit the exertion of resistant capacity of frames. A simplified method to estimate the overall ultimate resistant capacity of steel frame structures under horizontal load in plastic design is given with complete calculation process and formulas, and nine frame models are calculated by using finite element analysis software ANSYS. Comparing the results of the resistant capacity of steel frame structures under horizontal load between finite element simplified method is tended to give an analysis and simplified estimation method, it is proved that this kind of acceptable and safe result.

关 键 词：平面不规则框架 整体水平极限承载力 塑性设计 有限元分析 

分 类 号：TU391[建筑科学—结构工程] TU375