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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。
According to the design of the strengthened hemispherical connecting node between the huge pillar and the roof trusses of Guangdong Science Center, it is necessary to carry out the static full-scale test for the node. The specimen of this node was welded to the hemisphere ball wall in the plane of 6 chords, and 3 webs outside the plane were welded to the hemispherical ball wall. Through the redesigned steel self-balancing reaction load device to load it to simulate the actual structure of the force conditions and performance, supplemented by the corresponding test system for the displacement and strain of the relevant components tested to examine the value loaded into the design After 1.2 times, the stress state of the node is relative to the safety margin of design strength, and continues to be loaded until it is destroyed to get the stress, the distribution of its plastic zone, the node deformation, the ultimate bearing capacity and the failure mode. The finite element software ANSYS is used for nonlinear analysis of the node, and the analysis results are compared with the test results to provide reference for the design.