穿斗式木结构榫卯节点加固的抗震性能研究

Study on Seismic Performance of Mortise-tenon Reinforcement Joints in Chuandou Style Timber Structure

选取西南民居常见穿斗式木结构典型的直榫型边节点,采用穿木销和穿钢销加固方案,通过单调和低周往复加载足尺试验,对比加固方法对直榫边节点抗震性能的影响。结果表明:相比未加固节点,两种加固节点的破坏程度均有所降低,且有效抑制拔榫现象;穿木销和穿钢销加固节点的初始刚度分别提高了50%和75%,屈服弯矩分别提高了45%和73%,极限弯矩分别提高了27%和69%,耗能能力分别提高了200%和69%。两种方法均有效提高了穿斗式木结构直榫边节点的抗震性能。

In this study,the straight tenon-type edge joint was selected,which was the common typical joint in chuan-dou style timber structure of southwestern residential buildings in China.The reinforcement schemes were adopted,which including wood-pin and steel-pin.And the influence of two reinforcement methods on the seismic resistance of straight joints was compared,through the monotonic loading and lowcycle reversed loading full-scale tests.The results showed that the damage degree of the two reinforced joints were reduced,and could effectively inhibit the tenon pulling occurrences,compared with the unreinforced joints.Using wood-pin and steel-pin reinforcement,the initial stiffness of the joints was increased by 50%and 75%,the yield bending moment was increased by 45%and 73%,the moment-resisting capacity was increased by 27%and 69%,and the dissipated energy was increased by 200%and 69%,respectively.In conclusion,both methods effectively improved the seismic performance of mortise-tenon joints in chuandou style timber structure.