| 受火侵袭简支钢梁的冲击动力响应 |
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| 引用本文： | 郑春梅,席丰. 受火侵袭简支钢梁的冲击动力响应[J]. 山东建筑工程学院学报, 2006, 0(5) |
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| 作者姓名： | 郑春梅 席丰 |
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| 作者单位： | 山东建筑大学工程力学研究所 山东济南250101 |
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| 基金项目： | 教育部科学技术研究重点项目基金(02084)，教育部留学回国人员科研启动基金资助 |
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| 摘 要： | 利用有限差分离散控制方程进行数值分析,研究了火侵袭时简支钢梁在阶跃载荷作用下的弹塑性动力响应。通过对不同应变率下和不同温度下的挠度曲线的分析,阐明了塑性应变率和温度对冲击载荷作用下梁挠度的影响,还给出了极限温度与载荷和应变率的定量关系。研究表明,塑性位移随应变率的增大而逐渐减小,却随温度的升高而逐渐增大。
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| 关 键 词： | 钢梁 火 冲击 应变率 动力响应 极限温度 |
The impact dynamic response of a simply-supported steel beam in fire |
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| ZHENG Chun-mei,XI Feng. The impact dynamic response of a simply-supported steel beam in fire[J]. Journal of Shandong Institute of Architecture and Engineering, 2006, 0(5) |
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| Authors: | ZHENG Chun-mei XI Feng |
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| Abstract: | Using the method of finite difference to discrete the governing equation,the elastic-plastic dynamic response of a simply-supported steel beam subjected to stepped loading and fire loading was investigated.The influence of plastic strain rate and temperature on the deflection of the beam was discussed through analyzing the deflection curves of the beam at different strain rates and different temperature.And the relations among limit temperature,load and strain rate are also given.The analysis presents that plastic displacement decreases with plastic strain rate increasing,and increases with temperature elevating. |
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| Keywords: | steel beam fire impact strain rate dynamic response limit temperature |
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