基于重要杆件失效网架结构连续倒塌动力试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (23) : 106-114.

论文

丁北斗1,2, 吕恒林1,2，李贤1,2 周列武1

作者信息 +

Experimental Study on Dynamical Progressive Collapse of Grid Structure Triggered by Key Member Failure

DING Bei-dou1,2 ，LV Heng-lin 1,2, ，LI Xian1,2 ZHOU Lie-wu1,2

Author information +

文章历史 +

摘要

在网架结构模型中，基于杆件轴力与应变能变化响应的杆件重要性评估方法确定初始破坏杆件并引入失效装置，进行了基于杆件失效的结构连续性倒塌试验。在试验过程中，利用动态应变仪、拉线式位移和加速度传感器，获取网架结构模型因初始破坏引发的动态过程总的应变、位移和加速度时程曲线，揭示网架结构连续性倒塌的破坏过程及破坏机制。仿真分析和试验结果表明，支座之间及其相邻腹杆是网架结构关键杆件，其初始破坏失效后，会造成网架结构的连续性倒塌，在实际设计过程中要加强其构件承载力。

Abstract

In the test model of grid structure, experiment on progressive collapse of structure on account of the member failure has been carried out, in which member importance evaluation method based on member axial force and the response to strain energy change has been adopted to determine the initial failure member and a manually controlled failure apparatus has been installed. During the model test, by using dynamic strain meter, guyed displacement and acceleration sensor, the response on the whole in the dynamic process triggered by the initial failure, the time history curves of the displacement and acceleration could be obtained, which would reveal the collapse process and mechanism. The numerical simulation analysis and test results show that some members between bearings and adjacent members of grid structure are key ones which will cause the progressive collapse of the grid structure after their initial failure so in the actual design, it is necessary to strengthen their bearing capacities.

导出引用

丁北斗1,2, 吕恒林1,2，李贤1,2 周列武1. 基于重要杆件失效网架结构连续倒塌动力试验研究[J]. 振动与冲击, 2015, 34(23): 106-114

DING Bei-dou1,2,LV Heng-lin 1,2,,LI Xian1,2 ZHOU Lie-wu1,2. Experimental Study on Dynamical Progressive Collapse of Grid Structure Triggered by Key Member Failure[J]. Journal of Vibration and Shock, 2015, 34(23): 106-114

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