CFRP布加固古建筑木构架抗震试验

为保护古建筑，采用试验方法，研究了CFRP布加固榫卯节点后木构架的抗震性能。基于故宫太和殿某开间的实际尺寸，制作了1：8比例的4梁4柱榫卯连接木结构空间框架模型。采用人工加载方式，进行了低周反复加载试验，其中加固前构架试验做了3组，加固后构架试验做了2组。通过试验，获得了构架的力一侧移滞回曲线，分析了构架的骨架曲线、耗能能力、刚度退化及变形能力。结果表明：CFRP布加固榫卯节点后，虽然构架耗能能力略有下降，但节点拔榫尺寸减小，构架的侧移刚度和承载力提高，刚度退化不明显，且构架具有较好的变形能力，因此具有较好的加固效果。

Experimental study on aseismic behaviors of Chinese ancient structure strengthened by CFRP sheets

To protect Chinese ancient building, aseismic behaviors are studied by experiments of Chi- nese ancient wooden structure strengthened by CFRP sheets. Based on actual sizes of some part of TaiHe Palace in the Forbidden City, wooden frame models with a scale of 1：8 of the prototype structure are built considering tenon-mortise connections. By manual loading means low cyclic reversed loading tests are carried out with 3 unstrengtbened models and 2 CFRP strengthened models. In the experiments,load-displacement hysteretie curves as well as skeleton curves of the models are obtained, and the energy dissipation capability, stiffness degradation as well as deformation performance of each mod- el are studied. Results show that although the structural energy dissipation capacity decreased slightly after the model is strengthened by CFRP sheets on tenon-mortise location, the node pull tenon size reduces, its lateral stiffness and beating capacity improve, its stiffness degradation is not obvious, and it still has good deformation performance. Therefore , CFRP has a better reinforcement effect.