钢框架梁柱节点在结构连续倒塌中的性能分析

Analysis of Performance of Beam-Column Connections of Steel Frame in the Progressive Collapse of Structures

自英国Ronan Point公寓楼发生连续倒塌以来,各国学者开始对结构的连续倒塌进行研究,但新型抗震节点对结构抗连续倒塌性能的作用尚缺乏研究.利用非线性有限元方法,对3种型式的梁柱节点在结构的某一柱子失效后的性能进行了弹塑性分析.结果表明:在未考虑节点焊接缺陷的条件下,新型节点的延性较好,可以在结构发生局部破坏时不发生脆性破坏.

Many researchers began investigations on the structure progressive collapse since the progressive collapse of Ronan Point apartment building occurred.However,there are still few researches on the performances of new connections to the resistance of progressive collapse.In this paper the elastic-plastic performances of 3 beam-column connections are investigated in the scenario that a column fails by means of nonlinear FEA.The analyses indicate that new seismic connection has better ductility and would not cause brittle failure when local failure of structures have occurred with the situation that welding defect is not considered.