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梁柱节点是框架结构的关键连接部位,其连接性能决定着整体框架的抗震性能。为了研究薄柔H形钢部分包裹混凝土梁柱节点的应力分布、位移反应及承载力,分析节点各部件塑性渐变的全过程以及破坏模式,针对端板半刚性连接的梁柱节点形式,对部分包裹混凝土柱与型钢梁连接组合体在低周反复水平荷载作用下的受力性能进行了试验研究。试验共设计了4个构造不同的梁柱组合体,研究各连接组件板域的应变分布,试件各控制点的屈服次序为:梁翼缘处的横向系杆,梁端部受拉翼缘,柱翼缘,与梁受拉翼缘焊接的端板。分析了端板厚度、加劲板、背垫板对梁柱组合体承载力、刚度及延性性能的影响,结果表明,随端板厚度的增加及设置背垫板,组合体的承载力提高,端板厚度及设置背垫板对组合体的刚度影响很大,部分包裹混凝土柱与型钢梁外伸端板连接组合体的延性满足规范要求。
Beam-column joints are the key connecting parts of the frame structure, and their connection performance determines the seismic performance of the whole frame. In order to study the stress distribution, displacement response and bearing capacity of thin flexible H-beam partially wrapped concrete beam-column joints, the whole process of plastic deformation and failure mode of each component of the joint were analyzed. For the semi- Experimental study on the mechanical behavior of concrete-filled concrete column and steel-framed beam combination subjected to low-level repeated horizontal loading was carried out. A total of four beams and columns with different configurations were designed to study the strain distribution in the plate domain of each connecting component. The order of yield of each control point of the specimen was: the transverse tie rod at the flange of the beam, Flange, welded to the flange of the beam. The effects of thickness of end plate, stiffener plate and backing plate on the bearing capacity, stiffness and ductility of beam-column assembly are analyzed. The results show that with the increase of end plate thickness and the backing plate, The thickness of the slab and the backing plate have a great influence on the stiffness of the assembly, and the ductility of the partially wrapped concrete column and the profiled steel beam outrigger end plate meets the specifications.