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为保护古建筑,采用试验方法,研究了不同方法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梁柱节点的具体尺寸,制作了1:8比例的4梁4柱木结构空间框架模型,其中梁和柱考虑为燕尾榫形式连接。采用人工加载方式,进行了低周反复加载试验,研究了马口铁、CFRP布和钢构件加固榫卯节点后对木构架抗震性能的影响。基于试验结果,获得了加固前后构架的力-侧移滞回曲线和骨架曲线,分析了构架耗能能力、刚度退化规律及变形能力,对不同方法加固木构架的抗震效果进行了对比,对其工程应用提出了建议。
In order to protect the ancient buildings, the test method was used to study the seismic behavior of the timber frame after the tenon joints were strengthened by different methods. Based on the specific dimensions of the beam-column joints of Taihang Temple in the Forbidden City, a 1: 8 ratio 4-beam-4-column wood structure space frame model was constructed, in which beams and columns were considered as dovetail joints. The low-cycle repeated loading test was carried out by artificial loading method, and the influence of the tenon-mortise joints of tinplate, CFRP sheet and steel member on the seismic performance of the timber frame was studied. Based on the test results, the force-displacement hysteretic curves and skeleton curves of the frame before and after reinforcement are obtained. The energy dissipation capacity, stiffness degradation and deformation capacity of the frame are analyzed. The seismic effects of different methods of wood frame reinforcement are compared. Engineering application made recommendations.