竹胶板夹板剪力墙抗侧力性能试验研究

In order to investigate the improvement in the lateral performance of midply shear wall by using plybamboo panels and self-tapping screws, nine midply-bamboo shear wall specimens were tested under monotonic and cyclic loading. Their failure modes, shear stiffness, shear strength, ductile ratio and hold-downs' behavior were evaluated and compared to those of the midply shear walls fabricated with wood-based structural panels and common nails. The results show that using plybamboo panel and self-tapping screw in midply shear walls can effectively avoid the failures of sheathing tearing and fastener's withdrawal, and achieve 11.2%−63.0% and 51.2% − 107.1% increase in shear stiffness and shear strength of the walls, respectively. Increasing screw spacing will reduce the shear stiffness and shear strength of the midply-bamboo shear walls, but contribute to enhancing their ductility. The new designed hold-down connector is beneficial to avoid the fracture of the end studs in midply shear walls, and can provide an uplift stiffness of 6.40−8.76 kN/mm. The midply-bamboo shear wall is quite suitable for being infilled in timber frame, and can be used as the primary lateral components in mid-rise timber frame structures.