土木工程与管理学报2012，Vol.29Issue(1)：10-14,5.
Y型圆钢管节点耐火性能的有限元分析
Finite Element Analysis on Fire Resistance of Circular Tube Y-joints
摘要
Abstract
The fire resistance of circular tube Y-joints was investigated by using finite element software ABAQUS under the rising temperature. Based on existing experimental research results, accuracy and reliability of the modeling method were validated by building verification models and comparing with the experimental data. Analytical models with different parameters were established according to the description of relevant properties of steel in Eurocode 3. The effect of geometrical parameters θ,β,γ and load ratio n on the fire resistance of circular tube Y-joint was investigated. The fire resistance of the joints significantly reduces with increase of the load ratio n. In the condition of the same load ratio, the bigger β results in the better the performance of fire resistance. When the load ratio is small, the bigger θ, the better the performance of fire resistance is obtained and the fire resistance of joint decreases with the increase of the load ratio.γ has little effect on the fire resistance of the joints. An increasing load ratio n seriously affects the fire resistance of circular tube Y-joint, resulting from that the decreasing constraint reaction force generated by expansion of steel, which is greatly bigger than the reaction force caused by the applied load.关键词
钢结构/Y型圆钢管节点/有限元分析/耐火性能/ABAQUSKey words
steel structure/ circular tube Y-joint/ finite element analysis/ fire resistance/ ABAQUS分类
建筑与水利引用本文复制引用
高飞,关兴泉,吴志高,陆恩旭..Y型圆钢管节点耐火性能的有限元分析[J].土木工程与管理学报,2012,29(1):10-14,5.基金项目
教育部博士点基金(20090142120074) （20090142120074）
华中科技大学校自主创新基金(2011QN177) （2011QN177）
