轻型木结构剪力墙新型面板钉节点试验研究

Experimental Study on a New Type of Panel Nailing Joint for Light Wood-framed Shear Walls

面板钉节点是影响木剪力墙抗侧力性能的重要因素,为提高面板钉节点的工作性能,提出一种黏结硅胶条的新型面板钉节点。并对新型面板钉节点进行了单调加载试验,分析了不同类型钉节点的承载能力、变形能力和破坏模式。试验结果表明:新型面板钉节点较常规钉节点承载力明显提升,当硅胶条与结构胶协同工作良好时,新型面板钉节点的延性、极限位移会得到进一步提升;同时发现顺纹方向加载试件承载能力和初始刚度等均优于横纹方向加载试件。最后对延性较好的新型面板钉节点的荷载-位移曲线进行了拟合,为该新型面板钉节点在轻型木结构剪力墙的有限元研究中提供了合理的恢复力模型。综上,相较于常规钉节点,新型面板钉节点各方面性能显著提升,可用于工程实践推广。

In order to improve the performance of the panel nail joints,a new type of panel nail joints bonded by silica gel strip was proposed.The monotonic loading test was carried out on the new type of panel nail joints,and the bearing capacity,deformation capacity and failure modes of different types of nail joints were analyzed.The test results show that the bearing capacity of the new type of panel nail joints is significantly improved compared with that of the conventional one.When the silica gel bar and the structural adhesive work well together,the ductility and limit displacement of the new type of panel nail joints is to be further improved.At the same time,it is found that the load capacity and initial stiffness are better than those in the transverse direction.Finally,the load-displacement curve of the new type of panel nail joints with good ductility was fitted,which provided a reasonable restoring force model for the finite element study of the new type of panel nail joints in the light timber structure shear walls.In conclusion,compared with conventional nail joints,the new type of panel nail joints significantly improves performance in all aspects and can be used for engineering practice promotion.