直榫节点木结构模型振动台抗震性能试验研究

Experimental study on seismic performance of wooden structure model with straight tenon joints on shaking table

采用振动台试验方法,以广州古建筑陈家祠厅堂型结构作为研究对象,制作了缩尺比1∶5的单间木结构模型,探索了直榫节点木结构建筑抗震能力,并分析了搁放柱脚、榫卯节点与屋顶3种不同构造做法的抗震机理。结果表明:直榫节点木结构建筑能抵抗9度地震作用;榫卯节点、搁放柱脚等构造具有良好的减震耗能作用,其中榫卯节点的减震性能较好,动力放大系数能降到0.236;搁放柱脚与柱顶石之间摩擦耗能较弱,动力放大系数在0.9附近波动;厅堂型结构屋顶层具有动力放大效应,其动力放大系数大于1。

In this paper,the shaking table test method is used to make a 1∶5 scale single-room timber structure model of the Chen Clan Academy Hall structure of Guangzhou Ancient Architecture.The anti-seismic capability of the wooden structure with straight tenon joints is explored,and the aseismic mechanism of three different structural methods of placing column foot,tenon-and-mortise joint and roof is analyzed.The results show that the wooden structure with straight tenon joints can resist 9-degree earthquake.The structures such as tenon and mortise joints and column footings have good shock absorption and energy dissipation and the vibration absorption performance of mortise-tenon joints is better,and the dynamic magnification coefficient can be reduced to 0.236,and the dynamic magnification factor of the roof of the hall structure is greater than 1.