（1 上海交通大学海洋工程国家重点实验室，上海 200240；2 上海交通大学船舶海洋与建筑工程学院，上海 200240）

［摘要］连续倒塌是由局部关键承载构件的破坏经不断累积引起结构整体倒塌的破坏形式，会给人员和财产带来巨大的损失。钢框架梁柱连接节点形式会影响结构整体抗连续倒塌性能。总结了多种典型梁柱连接节点在钢框架连续倒塌全过程中的抗力机制及破坏模式，探究了节点关键参数对结构抗连续倒塌性能的影响。研究表明经改进的刚性连接节点可有效提升结构抗倒塌性能，而半刚性连接节点在大变形下的力学性能受其构造影响极大。同时对后续研究分析进行了展望。

［关键词］钢框架；连续倒塌；梁柱节点；悬链线机制

中图分类号：TU391文献标识码：A文章编号：1002-848X(2020)24-0011-08

Research progress on the effect of typical beam-column joints on progressive collapse resistance of steel  frames

PAN Zhufeng1,2, YANG Jian1,2, WANG Feiliang1,2, LU Yihui1,2, ZHANG Jingbo1,2

(1 State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China；2 School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract:The propagation of failure due to the loss of the critical members leads to the progressive collapse of the entire structure and will impose huge threats to building users or properties. Different forms of beam-column joints in steel frame will render differing mechanism for resisting such type of failure. The structural behaviors and the failure modes of typical beam-column joints in the whole process of progressive collapse were documented, and the influence trends of key parameters on the  progressive collapse resistance was investigated. Researches show that modified rigid joint can effectively improve the behavior of structure in progressive collapse resistance. Mechanical performance of semi-rigid joint under large deformation is significantly influenced by the joint details. The future work on this subject was also proposed.

Keywords:steel frame; progressive collapse; beam-column joint; catenary mechanism

*国家重点专项(2016YFC0701400)。

作者简介：潘珠峰，博士研究生，Email: panzhufeng@sjtu.edu.cn；通信作者：杨健，博士，教授，博士生导师，Email: j.yang.1@sjtu.edu.cn。