巨型钢框架中加强型半球节点试验研究  

Experimental research on enhanced hemisphere node in mege-frame steel structure

作　　者：张季超[1] 易和[2] 李霆 周观根 邱志恒[1] 刘茂龙[1] 

机构地区：[1]广州大学土木工程学院,广州510006 [2]广东科学中心,广州510006 [3]中南建筑设计院,武汉430071 [4]浙江东南网架股份有限公司,杭州311209

出　　处：《建筑结构》2010年第8期38-41,70,共5页Building Structure

基　　金：广东省科技计划项目(2004B10101048);(2005A11601014);(2006B37301009);建设部科技计划项目(2005-K1-48);(2006-K3-01);(2007-K3-09)

摘　　要：结合广东科学中心巨柱与屋面管桁架加强型半球连接节点的设计实际,需要对该节点进行静力足尺试验。该节点试件在平面内为6根弦杆焊接在半球球壁上,在平面外为3根腹杆焊接在半球球壁上。通过重新研制的钢构反力自平衡加载装置对其进行加载,以模拟实际结构的受力状况和性能,并辅以相应的测试系统进行相关构件的位移和应变测试,考察加载到设计值的1.2倍后,该节点的应力状况相对于设计强度的安全余度,继续加载直至破坏以获得其应力及其塑性区分布规律、节点变形、极限承载力、破坏模式等受力性能。利用有限元软件ANSYS对该节点进行非线性分析,并将分析结果与试验结果进行对比分析,为设计提供参考。Combined with the reinforced hemisphere node of pillars and roof truss in Guangdong Science Center,the full scale static test of the node was performed.Six chords were welded on the hemisphere wall in the horizontal plane,and three members were welded on the hemisphere wall in the vertical plane.The steel counterbalancing loading device was developed,and the displacement and strain were measured.The node stress was checked when the load was 1.2 design value.The joint was loaded until the damage in order to obtain the force performance,including the stress and the distribution of plastic zone,the node deformation,ultimate bearing capacity,failure mode and so on.Nonlinear analysis of the nodes was performed using finite element software ANSYS,and the results were compared with the test results.It provides a reference for the design.

关 键 词：巨型钢桁架 半球节点 静力足尺试验 位移测试 应变测试 

分 类 号：TU392.1[建筑科学—结构工程]