摘要
研究了双线性和三线性两种不同的材料模型对火灾下梁极限温度、梁中的轴力、端点及中点的弯矩的数值分析结果的影响,发现由等向强化的双线性材料模型和考虑屈服平台的三线性材料模型所得到的钢结构火灾下响应的规律基本相同,但对极限温度和最大轴力及弯矩值却有较大的影响,直接关系到钢结构的耐火极限及耐火设计的可靠性和安全性.
Bilinear and trilinear material models were applied to the numerical analysis of fire test of axially restraint steel beams. The effect of material models on critical temperature, axial force, bending moment at beam end and mid-span was investigated and numerical analysis result showed that the material models had great effect on the analysis result of fire resistance of the beams and it will affect the safety and reliableness of fire resistance design and limit
出处
《天津理工大学学报》
2005年第2期4-7,共4页
Journal of Tianjin University of Technology
基金
天津市自然科学基金资助项目(023607211)
天津市高校科技发展基金资助项目(20040505).
关键词
钢结构
抗火性能
应力应变关系
材料模型
steel structure
fire resistance
stress-strain relationship
material model
