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针对传统刚性节点延性较差,且容易发生脆性断裂等问题,提出了一种新的节点形式,即狗骨式节点。本文采用几何、材料和接触等不同的非线性的ANYSYS有限元软件对弱轴连接的梁柱狗骨式节点进行研究,分别分析其在单向和循环荷载作用下的受力特征以及抗震性能。研究得出,狗骨式节点的延性得到有效提升,使地震作用下塑性铰偏离脆弱的节点焊缝,发生在具有较大延性的梁端,从而有效发挥钢材的塑性性能。
Aiming at the problems of poor ductility and brittle fracture of traditional rigid joints, a new node form is proposed, namely dog bone nodes. In this paper, the non-linear ANSYS finite element software such as geometry, material and contact is used to study the beam-column dog-bone joints with weak shaft connection. The mechanical characteristics and the anti-seismic performance under unidirectional and cyclic loading are analyzed respectively. The results show that the ductility of dog bone joints can be effectively improved, so that the plastic hinge away from the weak joint welds caused by the earthquake, occurs on the beam ends with greater ductility, so that the ductility of the steel can be effectively exerted.