摘要
进行了2个足尺钢管桁架的抗火试验,建立了桁架的有限元模型,经比较,有限元与试验结果吻合良好。火灾试验和有限元分析结果表明:火灾作用下平面圆钢管桁架的破坏主要是由于腹杆管壁局部屈服引起的;并且随着荷载比的增加,平面圆钢管桁架的耐火极限温度逐渐降低。
Experimental research has been conducted to study the mechanical behavior of two full-scale steel planar circular tubular trusses without fire-proof coating under fire conditions.The finite element model of the truss is established.The results of finite element method and test agree very well by comparision.The experimental and finite element method results demonstrate that the failure of the specimens was caused by local buckling of the brace members,and the bigger the load ratio,the lower the critical temperature.
出处
《低温建筑技术》
2012年第2期27-29,共3页
Low Temperature Architecture Technology
基金
中国高技术研究发展(863)计划(2007AA09Z322)
关键词
平面圆钢管桁架
极限温度
有限元
抗火性能
steel planar circular tubular truss
critical temperature
finite element
anti-fire performance
