通过对3个按照《营造法式》制作的二等材殿堂式木构架的缩尺模型,以及3个碳纤维布和2个扁钢加固榫卯节点的构架模型在水平低周反复荷载作用下的试验研究,得到了未加固构架、碳纤维布加固构架及扁钢加固构架的破坏特征、滞回曲线、骨架曲线、强度和刚度退化规律、变形及耗能等性能。试验结果表明:所有构架的梁、柱构件完好无损,破坏均发生在榫卯节点;未加固构架、碳纤维布加固构架及扁钢加固构架的滞回曲线有明显的不同;碳纤维布和扁钢加固后构架强度和刚度增加,而耗能能力却有所降低;木构架具有非常好的变形能力。扁钢加固适合于强度或刚度明显不足且较隐蔽的榫卯节点,而碳纤维布加固适合于破损程度较小的榫卯节点。
Low-cyclic reversed loading tests were conducted on eight wooden frame models, including three non- reinforced models made in accordance with the requirements of the Fabrication Methods of A.D.) , three models strengthened with carbon fiber reinforced polymer (CFRP) Song Dynasty sheet, and (960-1270, two models strengthened with flat steel. Their behaviors, such as the failure characteristics, hysteretic curve and skeleton curve, degeneration of strength and rigidity, deformation and energy dissipation capacity, are analyzed. The results indicate that the destructions occur at the mortise-tenon joints rather than in the beams and columns for all of those tested frames. The hysteretic hoop of non-reinforced wooden frame models is apparently different from that of strengthened frame models. The strength and rigidity of the strengthened models are higher than those of the non-reinforced models, whereas their energy dissipation capacities are lower. Wooden frame structures exhibit good deformation performance. Flat steel is suitable for the strengthening of hidden mortise-tenon joints, the strength or rigidity of which is not that large, whereas CFRP sheet is suitable for mortise-tenon joints with minor damages.