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为了研究梁端加强型长焊接孔节点的滞回性能,对7个不同细部构造的节点用ABAQUS软件进行有限元模拟分析。首先,对长焊接孔节点在循环荷载作用下的受力性能进行有限元模拟并与试验对比验证;然后,对长焊接孔节点进行扩翼加强并对该新型节点进行循环荷载作用下的有限元变参数分析,研究焊接孔长度的变化对该节点滞回性能的影响,最后对发现的问题进一步改进。研究结果表明:扩翼式长焊接孔节点的滞回曲线呈饱满的梭形,随着焊接孔长度的增大,焊接孔末端的应力逐渐增大,但梁端的应力也增大且基本大于焊接孔末端的应力,说明扩翼式长焊接孔节点并不能明显改善节点的受力状态;对长焊接孔节点进行梁端盖板加强后,应力水平明显降低,且焊接孔末端的应力水平始终高于梁端焊缝处的应力,说明盖板型长焊接孔节点可以有效地保护节点焊缝。
In order to study the hysteretic behavior of reinforced joints with long welded ends, seven nodes with different details were analyzed by ABAQUS software. First of all, the mechanical behaviors of long welded joints under cyclic loading are simulated by FEM and compared with the experimental ones. Then, the finite element method of finite element Variable parameter analysis to study the impact of weld hole length changes on the hysteresis performance of the node, and finally to further improve the problems found. The results show that the hysteresis curve of the joints with long holes is full and fusiform. With the increase of the welding hole length, the stress at the welding hole gradually increases, but the stress at the beam end also increases and is basically greater than the welding The stress at the end of the hole indicates that the joints with long welding holes can not obviously improve the stress state of the joints. The stress level of the long welded joints is obviously reduced and the stress level at the welding hole ends is always high The stress at the beam end weld shows that the cover type long welding hole node can effectively protect the joint weld.