| 两种不同的恒载升温方式下的钢材破坏机理分析 |
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| 引用本文： | 李焕群,屈立军.两种不同的恒载升温方式下的钢材破坏机理分析[J].防灾减灾工程学报,2012(Z1):50-54. |
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| 作者姓名： | 李焕群 屈立军 |
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| 作者单位： | 武警学院灭火救援技术公安部重点实验室 |
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| 基金项目： | 公安部应用创新计划研究项目(2008YYCXWJXY117)资助 |
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| 摘 要： | 通过对我国建筑结构用钢在拉伸和压缩两种方式下的恒载升温试验,进行了5次受拉试件和2次受压试件的对比研究,根据试验中材料的各自变形规律,对其破坏机理进行了理论分析;从材料屈服的定义出发,给出了恒载升温拉伸试验中的参数(对应温度下的临界荷载水平),并与恒载升温压缩试验中的参数项进行了对比,指出受压构件和受拉构件的高温屈服强度是不同的,因此在钢结构建筑的耐火设计中应分别取不同的安全系数。
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| 关 键 词： | 恒载升温 破坏机理 高温屈服强度 |
Analysis of The Yield-mechanism of The Steel Component by Two Kinds of Transient Tests |
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| LI Huan-qun,QU Li-jun.Analysis of The Yield-mechanism of The Steel Component by Two Kinds of Transient Tests[J].Journal of Disaster Prevent and Mitigation Eng,2012(Z1):50-54. |
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| Authors: | LI Huan-qun QU Li-jun |
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| Institution: | (The Ministry of Public Security Key Laboratory of Fire Fighting and Rescuing Technology,Langfang 065000,China) |
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| Abstract: | In This paper,experiments on compression and tension of structuralsteel were carried out by transient tests.The experiments include five tension tests and two compression tests.According to the deformation rule of the tested steel,the mechanism of yielding was analyzed.Based on the definition of yield for steel material,the strength parameters of the steel in tension tests were obtained via transient tests.The results were then compared with those in compression tests.It was found that the high temperature strengths of tension and compression components were different.Thus,different safety factors must be selected for these two components during fire resistance designing. |
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| Keywords: | transient test failure mechanism high temperature yield strength |
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