【摘要】 采用扒钉、CFRP布(碳纤维增强塑料布)和钢箍3种材料加固古建筑木构架榫卯节点.通过人工加载方式,进行低周反复加载试验,分析3种材料加固后榫卯节点M-θ(弯矩-转角)滞回曲线、M-θ均值骨架曲线、耗能能力、刚度退化和延性的变化,对比了3种材料加固榫卯节点的抗震效果,并对3种材料在木构架加固工程中的应用提出建议.结果表明:榫卯节点加固前后均有良好的变形能力;CFRP布加固节点承载力>钢箍加固节点承载力>扒钉加固节点承载力;CFRP布加固节点耗能能力>钢箍加固节点耗能能力>扒钉加固节点耗能能力;CFRP布加固节点刚度退化>扒钉加固节点刚度退化>钢箍加固节点刚度退化;CFRP布加固节点延性>扒钉加固节点延性>钢箍加固节点延性.建议扒钉用于小型木构架加固;CFRP布用于中小型木构架加固;钢箍用于中大型木构架加固.更多还原

【Abstract】 The tenon-mortise joints in wooden frame in Chinese ancient building were strengthened by iron hook,CFRP sheets(carbon fiber reinforced plastic sheets)and steel bands.The changes of M-θ(momentrotation angle)hysteretic curve,average M-θskeleton curve,energy dissipation capability,stiffness degradation and ductility of tenon-mortise joints after strengthened by three materials were analyzed by low-reversed cyclic manual loading experiment.The aseismic behaviors of tenon-mortise joints strengthened by three materials were compared.The engineering application range for three materials in strengthening wooden frame were proposed.Results show that the tenon-mortise joints have good deformation performance both before and after strengthened.For three strengthening materials,CFRP sheets>steel bands> iron hook in bearing capability of tenon-mortise joint;CFRP sheets>steel bands>iron hook in energy dissipation capability of joint;CFRP sheets>iron hook>steel bands in stiffness degradation of joint;CFRP sheets>iron hook>steel bands in ductility of joint.Thus engineering application suggestions for three strengthening materials are as follows:Iron hook may be used for small wooden frame;CFRP sheets for medium and small wooden frame;steel bands for medium and large wooden frame.更多还原