【摘要】 为探究中国古代大木作结构抗震加固的有效方法,分别采用马口铁和CFRP加固榫卯节点,研究了节点加固前后构架的抗震性能。制作了1∶8缩尺比例的木结构空间模型,通过进行低周反复加载试验,获得了构架加固前后的力-侧移曲线,并对比分析了相应的骨架曲线、耗能能力、刚度退化、变形能力等抗震指标。结果表明:马口铁和CFRP均可提高构架的刚度和承载力,且加固后的构架仍有很好的变形性能,但是耗能能力则不如加固前;另一方面,CFRP加固榫卯节点的效果优于马口铁。更多还原

【Abstract】 To get effective strengthening method for Chinese ancient wooden structures,both iron hook and CFRP are considered to strengthen tenon-mortise joints of Chinese ancient structures,and aseismic behaviors of them after strengthened are studied.Models with a scale of 1:8 of the prototype structure are built considering tenon-mortise connections.By low cyclic reversed loading tests,load-displacement hysteretic curves of the structures are obtained;By analysis their skeleton curves,energy dissipation capability,stiffiness degradation as well as deformation performance are also studied.Results show that both iron hook and CFRP can enhance strength and stiffness of the structure,which remains good deformation performance after strengthened,but energy dissipation capability decreases;On the other hand,CFPR performs better than iron hook in strengthening tenon-mortise joint.更多还原