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研究的节点类型在对钢节点梁翼缘削弱的同时,又利用盖板加强梁端,使节点在实现塑性铰外移的同时仍能保持较强的承载力与滞回性能。利用有限元分析软件ABAQUS,对该种新型节点--盖板加强型狗骨式节点的力学性能进行了分析,并将其与盖板加强型、狗骨式以及普通节点进行了对比。研究结果表明:盖板加强型狗骨式节点的极限承载力低于盖板加强型节点,但高于普通节点以及狗骨式节点;盖板加强型狗骨式节点的节点域的应力以及剪切变形均较小,可以有效避免节点域焊缝的脆性破坏;盖板加强型狗骨式节点的延性系数仅次于狗骨式节点,等效粘滞系数与狗骨式节点相仿,且都明显高于普通节点和盖板加强型节点,表现出良好的延性与耗能性能。
The node type of the study weakens the flange of the steel joint beam and at the same time, reinforces the beam end by the cover plate so that the node can maintain the strong bearing capacity and hysteretic performance while achieving the plastic hinge outward. The finite element analysis software ABAQUS was used to analyze the mechanical properties of the new type of node-cover-reinforced dog bone node, and compared with the reinforced, dog bone and common nodes. The results show that the ultimate bearing capacity of reinforced dog-bone joints is lower than that of the reinforced joints, but higher than that of common nodes and dog-bone joints. The stress of the node domain of the reinforced dog- Shear deformation is small, which can effectively avoid the brittle failure of joint welds. The ductility coefficient of the reinforced-type dog-bone joints is second only to the dog-bone joints, the equivalent viscosity coefficient is similar to that of dog-bone joints, and both Which is obviously higher than that of common node and cover reinforced node, showing good ductility and energy dissipation performance.