| 火灾下钢梁弯扭屈曲临界温度的计算方法 |
| |
| 引用本文： | 王慧青,张大山,李艳艳. 火灾下钢梁弯扭屈曲临界温度的计算方法[J]. 低温建筑技术, 2017, 39(8): 32-35. DOI: 10.13905/j.cnki.dwjz.2017.08.010 |
| |
| 作者姓名： | 王慧青 张大山 李艳艳 |
| |
| 作者单位： | 1. 厦门工学院土木工程系,福建厦门,361021;2. 华侨大学土木工程学院,福建厦门,361021 |
| |
| 基金项目： | 国家自然科学基金，福建省自然科学基金，华桥大学校级课题资助，泉州市科技计划项目 |
| |
| 摘 要： | 基于考虑横向荷载影响推导的钢梁整体失稳发生弯扭屈曲时临界弯矩的计算公式,引入高温下钢材的弹性模量随温度的折减系数,给出了火灾下钢梁整体失稳时临界温度的计算方法。研究表明,该方法计算结果与试验值吻合较好,满足结构抗火设计的精度要求。
|
| 关 键 词： | 钢梁 整体失稳 弯扭屈曲 临界温度 火灾 |
CALCULATION METHOD OF CRITICAL TEMPERATURE FOR FLEXURAL-TORSIONAL BUCKLING OF STEEL BEAMS IN FIRE |
| |
| WANG Huiqing,ZHANG Dashan,LI Yanyan. CALCULATION METHOD OF CRITICAL TEMPERATURE FOR FLEXURAL-TORSIONAL BUCKLING OF STEEL BEAMS IN FIRE[J]. Low Temperature Architecture Technology, 2017, 39(8): 32-35. DOI: 10.13905/j.cnki.dwjz.2017.08.010 |
| |
| Authors: | WANG Huiqing ZHANG Dashan LI Yanyan |
| |
| Abstract: | Based on the calculation formulas of critical moment for global flexural-torsional buckling of steel beams considering the effect of transverse load,a new method is proposed to calculate the critical temperature for flexural-torsional buckling of steel beams in fire,through incorporating the reduction factor for steel elasticity modulus at elevated temperatures.It is shown that the theoretical values are quite close to the experimental data and meet the requirement of structural fire resistance design. |
| |
| Keywords: | steel beam global instability flexural-torsional buckling critical temperature fire |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
