| 约束钢梁高温下大变形状态分析 |
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| 引用本文： | 李国强,郭士雄. 约束钢梁高温下大变形状态分析[J]. 同济大学学报(自然科学版), 2006, 34(7): 853-858 |
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| 作者姓名： | 李国强 郭士雄 |
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| 作者单位： | 同济大学,土木工程学院,上海,200092 |
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| 摘 要： | 根据约束钢梁高温下大变形状态下的内力平衡方程，从理论上推导了约束钢梁随温度变化的过程，推荐了一种高温下处于大变形状态的约束钢梁的分析方法，并通过有限元法进行了验证．根据提出的理论方法，研究了梁端轴向约束刚度、转动约束型式、荷载作用大小等因素对约束钢梁受力及变形的影响．
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| 关 键 词： | 钢框架 抗火设计 大变形 悬链线效应 |
| 文章编号： | 0253-374X（2006）07-0853-06 |
| 收稿时间： | 2004-12-09 |
| 修稿时间： | 2004-12-09 |
Analysis of Restrained Stell Girders with Large Deflection Subjected to Elevated Temperature |
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| LI Guoqiang,GUO Shixiong. Analysis of Restrained Stell Girders with Large Deflection Subjected to Elevated Temperature[J]. Journal of Tongji University(Natural Science), 2006, 34(7): 853-858 |
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| Authors: | LI Guoqiang GUO Shixiong |
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| Affiliation: | School of Civil Engineering, Tongii University, Shanghai 200092 ,China |
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| Abstract: | Based on the equilibrium equation of restrained steel beams with large deflection in fire condition, the changing behaviour of restrained steel beams with temperature increasing is studied. A simplified method of investigating restrained steel beams in the state is proposed and verified by finite element method. With the proposed method, the effects of the stiffness of axial restraints, types of rotational end restraints, and load ratio on the behaviour of restrained steel beams are analyzed. |
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| Keywords: | steel frame fire resistant design large deflection catenary action |
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