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（1 上海交通大學(xué)海洋工程國家重點(diǎn)實(shí)驗(yàn)室，上海 200240；2 上海交通大學(xué)船舶海洋與建筑工程學(xué)院，上海 200240）

［摘要］連續(xù)倒塌是由局部關(guān)鍵承載構(gòu)件的破壞經(jīng)不斷累積引起結(jié)構(gòu)整體倒塌的破壞形式，會(huì)給人員和財(cái)產(chǎn)帶來巨大的損失。鋼框架梁柱連接節(jié)點(diǎn)形式會(huì)影響結(jié)構(gòu)整體抗連續(xù)倒塌性能?？偨Y(jié)了多種典型梁柱連接節(jié)點(diǎn)在鋼框架連續(xù)倒塌全過程中的抗力機(jī)制及破壞模式，探究了節(jié)點(diǎn)關(guān)鍵參數(shù)對(duì)結(jié)構(gòu)抗連續(xù)倒塌性能的影響。研究表明經(jīng)改進(jìn)的剛性連接節(jié)點(diǎn)可有效提升結(jié)構(gòu)抗倒塌性能，而半剛性連接節(jié)點(diǎn)在大變形下的力學(xué)性能受其構(gòu)造影響極大。同時(shí)對(duì)后續(xù)研究分析進(jìn)行了展望。

［關(guān)鍵詞］鋼框架；連續(xù)倒塌；梁柱節(jié)點(diǎn)；懸鏈線機(jī)制

中圖分類號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*國家重點(diǎn)專項(xiàng)(2016YFC0701400)。

作者簡(jiǎn)介：潘珠峰，博士研究生，Email: panzhufeng@sjtu.edu.cn；通信作者：楊健，博士，教授，博士生導(dǎo)師，Email: j.yang.1@sjtu.edu.cn。