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采用高强度螺栓和连接钢框连接上下层预制钢筋混凝土(RC)墙板,形成一字形全装配式剪力墙。为了研究该全装配式剪力墙的基本力学性能及水平接缝的工作机制,以连接钢框的翼板厚度及高强度螺栓的公称直径及预拉力为参数,制作3个试件,进行了单调加载试验,对试件的水平荷载-侧移曲线及其特征点、钢筋应变、连接钢框与内嵌边框之间的相对滑移以及连接钢框的应变分布进行了分析。试验结果表明:采用螺栓连接的全装配式剪力墙具有较好的延性性能;减小高强度的螺栓直径及预拉力会使水平接缝内的相对滑移增大;减小连接钢框的翼板厚度会使连接钢框中的应力增加;连接钢框受压区的正应力远大于受拉区,受拉区与受压区分界点的位置与预制墙板基本一致。在试验的基础上,分析了水平接缝的工作机制。分析表明:摩擦作用、销栓作用是受拉区水平接缝传递荷载的主要方式;受压区水平接缝的工作机制与连接件之间的初始空隙有关,摩擦作用、销栓作用以及顶紧挤压作用是受压区水平接缝传递荷载的主要方式。
The use of high strength bolts and connecting steel frame to connect the upper and lower prefabricated reinforced concrete (RC) wall panels, the formation of a full-shaped cross-shaped shear wall. In order to study the basic mechanical properties of the fully assembled shear wall and the working mechanism of the horizontal joint, three specimens were made by taking the thickness of the flanges connected with the steel frame and the nominal diameter and pre-tension of the high-strength bolts as parameters The monotonic loading test was carried out to analyze the horizontal load-lateral displacement curve and its characteristic points, the strain of steel bar, the relative slip between the connected steel frame and the embedded frame and the strain distribution of the connected steel frame. The test results show that the fully assembled shear wall with bolted joints has better ductility; the reduction of the bolt diameter and the pre-tension of high strength will increase the relative slip in the horizontal joint; The thickness of the flange will increase the stress in the connecting steel frame. The normal stress in the compression zone of the connecting steel frame is much larger than that in the tension zone. The position of the boundary point between the tension zone and the compression zone is basically the same as the prefabricated wall panel. Based on the experiment, the working mechanism of horizontal seam is analyzed. The analysis shows that the friction and pinning are the main ways to transmit the load through the horizontal seams in the tension zone. The working mechanism of horizontal seams in the compression zone is related to the initial clearance between the connectors. The friction, the pinning and the top tightness Extrusion is the main method of transmitting the load at the horizontal joint of the compression zone.