钢框架梁柱节点子结构抗冲击力学性能有限元仿真研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (18) : 51-56.

论文

王宁，陈英，霍静思

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FE-based Analysis of Dynamic behavior of Beam-Column Connection of Steel Frame

WANG Ning, CHEN Ying, HUO Jingsi

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摘要

基于有限元软件ABAQUS对钢框架节点（全焊节点和栓焊节点）进行了非线性动态响应数值仿真模拟分析，模型合理考虑了螺栓预紧力、接触、非线性大变形及应变率效应等因素。采用该模型模拟梁柱节点子结构抗冲击试验，分析结果表明，采用显示求解器可获得较好精度和稳定性，有限元模拟的破坏模态、冲击力和位移时程曲线等结果与试验结果吻合良好。在大变形下过焊孔趾部是节点应力集中最显著的部位，是整个构件破坏的起始点。通过仿真分析，可获得梁柱节点子结构在冲击荷载作用下的动态响应和内力发展过程，该数值分析方法为深入研究钢结构抗倒塌工作机理并为合理评估其抗倒塌变形和耗能能力提供依据。

Abstract

Two kinds of widely used steel moment connections (Welded Unreinforced Flange-Welded Web and Welded Unreinforced Flange-Bolted Web) were modeled according to finite element software ABAQUS, taking bolt pretention force, contact, nonlinear large deformation and strain rate effect into consideration. This model was used to simulate beam-column substructures under impact load, and it shows that ABAQUS/explicit solver presents high precision and good stability, as a result, the finite element results of failure mode and time histories of impact load and deformation agree fairly well with experimental results. Under large deformation the most significant stress concentration located at the weld access hole, where is the initiation of the whole component. The dynamic response and internal force development of beam-column substructures are obtained by simulation analyses, this numerical analysis method hence provides the basis for studying working mechanism of progressive collapse of steel structures and for rationally accessing the ability of resisting collapse deformation and energy dissipation.

导出引用

王宁，陈英，霍静思. 钢框架梁柱节点子结构抗冲击力学性能有限元仿真研究[J]. 振动与冲击, 2015, 34(18): 51-56

WANG Ning, CHEN Ying, HUO Jingsi. FE-based Analysis of Dynamic behavior of Beam-Column Connection of Steel Frame[J]. Journal of Vibration and Shock, 2015, 34(18): 51-56

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