焊接空心球节点恒温加载试验  

Experimental Study on Welded Hollow Spherical Joints Under Loading and Constant Temperature

作　　者：薛素铎[1] 冯淼[1] 邱林波[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《北京工业大学学报》2010年第9期1222-1227,共6页Journal of Beijing University of Technology

基　　金：北京市自然科学基金资助项目(8082004)

摘　　要：基于火灾高温下网格结构的性能和受力特征,根据欧洲规范的钢材高温性能对焊接空心球节点的极限承载力进行了高温加载试验,分别在500℃、600℃、700℃三种温度下对节点进行加载,直至节点破坏,得到了在恒定温度下,节点的温度场分布和荷载位移曲线,并确定了高温下节点的破坏模式,为今后球节点的抗火设计提供理论依据.Based on the properties and stress characteristcs of space frame structure under fire, according to the high temperature propevties ruled in Eurocode the load-carrying capacity of the welded hollow spherical joint under constant high temperature are tested experimentally, the three joints are step loaded under three different temperatures-500℃ ,600℃ and 700℃ until they are failed. The temperature field and the load-displacement curves under the high temperature are got. The failure mode of welded hollow spherical joint under high temperature are also decided. The results could be the theory basis for the joint design in future.

关 键 词：火灾试验 恒温加载 极限承载力 

分 类 号：TU393.3[建筑科学—结构工程]