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对1个符合规范要求(无缺陷)和3个不符合规范要求(含缺陷)的门式刚架外伸式端板连接节点进行了承载力试验及相应的有限元分析,以了解实际工程中存在的含缺陷节点的力学性能,并对该类节点在正负弯矩作用下的性能进行了有限元分析。研究结果表明:在节点域屈曲起控制的节点中,节点域设置加劲肋对提高节点的承载力作用相当显著;相对于梁端板和柱翼缘同时加厚的无缺陷节点,含缺陷节点的极限承载力基本接近,但其弹性抗弯能力下降、初始转动刚度有所下降,其性能分析适合采用半刚性理论。所采用的有限元分析方法结果可靠,可为含缺陷节点的门式刚架结构的整体受力分析或后续加固提供依据。
The bearing capacity test and the corresponding finite element analysis of a gantry rigid frame outrigger end-plate connection node meeting the specification (no defect) and three non-conforming requirements (including defects) were carried out to understand the actual engineering The existence of defects containing nodes mechanical properties, and this node in the positive and negative moment under the action of the finite element analysis. The results show that in the joints with controlled buckling, the stiffeners in the node domain have a significant effect on improving the bearing capacity of the joints. Compared with the non-defective joints with thickening of the end plates and the flanges of the beam, The ultimate bearing capacity is basically close, but the elastic bending resistance decreases and the initial rotation stiffness decreases. Its performance analysis is suitable for the semi-rigid theory. The finite element analysis method used is reliable and can provide the basis for the overall stress analysis or subsequent reinforcement of the portal frame structure with defective nodes.