半刚性连接钢结构的二阶非弹性时程分析

钢结构框架节点分为铰接连接、半刚性连接、刚性连接．其中焊接节点按刚性连接计算，然而这种节点在地震作用下容易破坏而失效，失去承载力；半刚性连接多以高强度螺栓连接为主，在地震作用下表现出延性的特点，节点区域有一定的耗能作用，在强震作用下，节点进入塑性，对结构有一定的消能保护作用．通过对半刚性节点的二阶非弹性分析，对比了刚性节点和半刚性节点的弯矩一转角关系，节点．位移关系，比较了地震作用下结构顶层处的的单元弯矩数值，认为半刚性节点在地震作用下的性能较刚性节点优越，对钢结构设计及计算提供了一定的参考依据．

Analysis the Second-order Inelastic Time History of Semi-rigid Steel Connections

Hinged steel frame can be divided into connected nodes, semi-rigid connection, rigid connection. Among them, weld node can be regarded as rigid connection, but this kind of node is easy to be destroyed under earthquake and lose capacity for load ; most of semi-rigid connections is based on bolt connection, which can exhibit characteristics of ductility under earthquake, and there is energy consumption in node region, which can help node enter into plasticity and protect node under earthquake by consuming energy. Based on the inelastic a- nalysis in semi-rigid nodes, comparison of moment-rotation and node-displacement relationship between rigid and semi-rigid nodes and comparison of value of moment under earthquake at the top of the structure are all made, so we can conclude that the performance of semi-rigid nodes is better than rigid nodes under earthquake, and this kind of comparison can provide reference for structure design.