Anti-progressive collapse analysis for plane steel frame under impact load

被引：0
|
作者：
Qiao H. [1 ,2 ]
Guo Z. [1 ]
Chen Y. [2 ]
Zhang M. [3 ]
Qiu H. [4 ]
Wang Z. [5 ]
机构：
[1] College of Civil Engineering, Fujian University of Technology, Fuzhou
[2] College of Civil Engineering, Fuzhou University, Fuzhou
[3] Zhongmei Engineering Group Ltd., Nanchang
[4] China Construction Fourth Engineering Division Corp., Ltd., Guangzhou
[5] Fujian Xiexing Construction Co., Ltd., Fuzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 04期
关键词：
Direct column removal method; Impact column removal method; Impact load; Multi-story frame structure; Progressive collapse;
D O I：
10.13465/j.cnki.jvs.2022.04.023
中图分类号：
学科分类号：
摘要：
Many natural disasters and man-made factors may cause the progressive collapse of structures. The research on anti-progressive collapse usually puts aside the causes of collapse and directly demolishes the key columns to study the anti-collapse performance of the remaining structure. In this paper, the plane steel frame subjected to impact load was taken as an example to analyze the specific anti-collapse performance of the frame structure. A simplified impact force model was proposed to analyze the excitation response of the structural system to the impact force. The simulation results of the impact column removal method were compared with those of the traditional direct column removal method, and the influences of the two methods on the failure mode and dynamic performance were analyzed and then the impact responses of the impact blocks with different mass, velocity and energy to the frame structure were studied. The results show that the impact column removal method makes the joint stress distribution complex, causes damage to adjacent joints and components, and changes the stress and failure mode, while the traditional direct column removal method underestimates the dynamic response of the remaining structure; in addition, the dynamic characteristics of frame structure are closely related to the impact energy, especially the impact velocity. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：176 / 184
页数：8
相关论文
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