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| 火灾下轴心受压H型截面约束钢柱整体稳定设计 | |
| 引用本文： | 王培军,李国强,Wang Yong Chng.火灾下轴心受压H型截面约束钢柱整体稳定设计[J].土木与环境工程学报,2009,31(4):31-36. |
| 作者姓名： | 王培军 李国强 Wang Yong Chng |
| 作者单位： | 1. 山东大学,土建与水利学院土木工程系,济南,250061;土木工程防灾国家重点试验室,上海,200092 2. 土木工程防灾国家重点试验室,上海,200092;同济大学,土木工程学院建筑工程系,上海,200092 3. School of Mechanical,Aerospace and Civil Engineering,University of Manchester,PO Box88,Manchester,M60 1QD |
| 基金项目： | 国家自然科学基金重点项目，土木工程防灾国家重点试验室开放课题基金 |
| 摘 要： | 利用验证的有限元模型分析了轴向约束刚度比、轴力荷载比和钢柱长细比对火灾下轴心受压H形截面约束钢柱屈曲温度和破坏温度的影响，给出了其屈曲温度和破坏温度的计算方法。轴向约束刚度比对约束钢柱屈曲温度和破坏温度的影响可用指数函数表示，轴力荷载比和钢柱长细比对约束钢柱屈曲温度和破坏温度的影响可用多项式表示。采用有限元方法对计算公式进行了验证，设计公式计算结果与有限元分析结果吻合较好，且设计公式给出偏于安全的结果。 |
| 关 键 词： | 约束钢柱 屈曲温度 破坏温度 设计方法 抗火 |
Overall Stability Design of Restrained H Section Steel Columns under Axial Load in Fire |
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| WANG Pei jun,LI Guo qiang and WANG Yong chang.Overall Stability Design of Restrained H Section Steel Columns under Axial Load in Fire[J].Journal of Civil and Environmental Engineering,2009,31(4):31-36. | |
| Authors: | WANG Pei jun LI Guo qiang and WANG Yong chang |
| Affiliation: | WANG Pei-jun, LI Guo-qiang , WANG Yong-chang (1. School of Civil Engineering, Shandong University, Ji＇ nan 250061, P. R. China; 2. State Key Laboratory for Disaster Reduction in Civil Engineering, Shanghai 200092, P. R. China; 3. College of Civil Engineering, Tongji University, Shanghai 200092, P. R. China; 4. School of Mechanical, Aerospace and Civil Engineering, University of Manchester, PO Box88, Manchester, M60 1QD) |
| Abstract: | The effects of the restraint stiffness ratio, the axial load ratio and the column slenderness on the buckling temperature and failure temperature of a restrained H-section steel column under axial load in fire were studied with a calibrated finite element method （FEM） model. And the calculation methods of buckling temperature and failure temperature were proposed. The effect of the restraint stiffness ratio on the buckling temperature and failure temperatures could be expressed with an exponent curve while polynomial functions was appropriate for the effects of the axial load ratio and the column slenderness. The results of the proposed method were in good agreement with those by FEM method and on the safe side. |
| Keywords: | restrained steel column buckling temperature failure temperature design method fire resistance |
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