火灾与爆炸荷载作用下轻钢柱的破坏过程及破坏模式数值模拟分析

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• 英文论文题名：Analysis on Numerical Simulation of Failure Process and Modes of Lightweight Steel Column under Fire and Blast Loading
• 论文作者：齐宝欣 ; 阎石 ; 钱辉 ; 武行 ; 毕加亮
• 英文论文作者：Qi Baoxin ; Yan Shi ; Qian Hui ; Wu Xing ; Bi Jialiang ; Shenyang Jianzhu University ; Jianhsu Key Laboratory of Environmental Impact and Structural Safety in Engineering ; University of Houston ; Zhengzhou University
• 年：2016
• 作者机构：沈阳建筑大学;江苏省土木工程环境灾变与结构可靠性重点实验室;休斯顿大学;郑州大学;
• 论文关键词：火灾与爆炸荷载 ; 轻钢柱 ; 破坏模式
• 英文论文关键词：fire and blast loading ; lightweight steel column ; failure modes
• 会议召开时间：2016-10-27
• 会议录名称：第九届全国防震减灾工程学术研讨会论文集
• 语种：中文
• 分类号：TU352;TU392.1
• 学会代码：OGTY
• 会议名称：第九届全国防震减灾工程学术研讨会
• 会议地点：中国安徽合肥
• 主办单位：中国土木工程学会、中国工程院土木、水利与建筑工程学部、中国土木工程学会防震减灾工程技术推广委员会、合肥工业大学、安徽省住房和城乡建设厅
• 学会名称：中国土木工程学会
• 页数：11
• 文件大小：1096k
• 原文格式：O
• 会议级别：全国

摘要

本文将火灾爆炸作用下轻钢柱的破坏过程及破坏模式分成3种情况进行研究:单独考虑爆炸作用情况;综合考虑火灾和爆炸联合作用情况;火灾爆炸发生后继续升温情况。采用数值模拟分析方法,以铰接—固接、铰接—铰接、固接—固接支座约束条件下的轻钢柱为研究对象,获得各阶段轻钢柱的破坏模式。研究表明,轻钢柱破坏模式主要分为剪切破坏、弯剪破坏、弯曲破坏三种;破坏模式主要受支座约束条件的影响;火灾爆炸作用下轻钢柱跨中挠度随着温度的升高而增大;提出了单独考虑爆炸荷载作用和不同温度场下爆炸荷载作用轻钢柱变形简图。
In this paper,the failure process for the light steel column under the combined effects of fire and explosion were analyzed by three cases,including the case of considering the blast loading only,the combination of fire and explosion and the blast loading subjected to continuous heating.During the numerical simulation,the light steel column was constrained using pinned-fixed,pinned-pinned and fixed-fixed conditions,respectively,in order to obtain the failure modes of different stages.The results showed that the dominant failure modes were shear failure,combined shear and flexural failure,and flexural failure.The failure modes were dependent on the constraint conditions.The deflection at the mid-span of the column increases as the temperature increase.In addition,deformation diagrams were proposed for the cases of blast loading only and the blast loading with varying temperature.

引文

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