新型全装配式剪力墙结构水平缝节点的机理分析

提出一种采用内嵌边框、高强螺栓以及连接钢框连接相邻层预制墙板的新型干式连接方式.为研究该连接方案的可行性及连接件的传力机理,进行了试验研究及有限元模拟;然后对节点的传力路径进行了分析,并讨论了连接件的制作误差对传力路径的影响;最后对弹性阶段及弹塑性阶段时连接件的应力分布与重分布进行了分析,得到了连接钢框应力分布的计算模型以及高强螺栓传递剪力的计算公式.试验研究及有限元分析表明,该新型连接方案可行,传力路径明确.机理分析表明:连接钢框受压区的应力大于受拉区的应力;受压区高强螺栓传递的剪力大于受拉区高强螺栓传递的剪力,受压区的高强螺栓率先发生滑移.

Mechanism Analysis on Horizontal Joints in an Innovative Precast Shear Wall System

This paper proposed an innovative dry joint utilizing embedded steel frame (ELSF), high strength bolt (HSB), and connecting steel frame (CSF) as connecting components to connect the upper and lower precast shear wall panels properly. In order to investigate the feasibility of this novel joint and the load-transferring mechanism of the connectors, experimental study and finite element analysis were conducted firstly; and then the load-transferring route of the joint was analyzed in consideration of the manufacture error of the connectors; eventually the distribution and redistribution of the stress in the connectors from elastic stage to elastic-plastic stage were studied, and the calculation model of the stress in CSF and the calculation formulas of the shear forces transferred by HSBs were deduced. The experimental investigation and finite element analysis show the innovative joint is feasible and its load-transferring route is concise. The mechanism analysis shows the stress in the compressive zone of CSF is larger than that in its tensile zone; and the shear forces transferred by the HSBs at the compressive zone are larger than those transferred by the HSBs at the tensile zone, so the HSBs at the compressive zone slipped firstly.