古建筑榫卯节点抗震加固数值模拟研究

古建筑木结构榫卯节点的抗震加固方法研究,是保护古建筑工作中一项非常重要的内容。该文以遭受汶川地震的四川省剑阁县觉苑寺大雄宝殿为例,根据宝殿的典型震害症状,采用铁件加固榫卯节点的思路,用数值模拟方法,对结构加固前后的动力特性及地震反应状况进行了对比分析。结果表明:在地震作用下,节点在x、y向的位移及加速度反应均有所减小,结构的变形响应明显减小,数值模拟的结果与结构震害症状基本吻合。采用该方法进行古建筑木结构榫卯节点加固,结构具有更稳定的振动形式。

Numerical Simulation on Strengthening for Earthquake Resistance of Tenon-mortise Joints of Ancient Building

In order to protect Chinese ancient buildings,Da-xiong Palace in Jueyuan Temple is taken as an example to study its damages by Wenchuan earthquake as well as the strengthening methods on tenon-mortise joints.According to typical damage symptoms by the earthquake,it is considered to strengthen the tenon-moritse joints by iron hooks,and through the numerical simulation,the dynamic characters and earthquake responses of the structure before and after strengthening are compared and studied.The results show that after strengthening,the structure's vibration is more stable and its responses are less under earthquake,so as to be able to resist strong earthquakes.Therefore,the simulation results could accord with the actual damage symptoms of the structure,and also prove in theory that it is feasible to strengthen the tenon-mortise joints by iron hooks for Chinese ancient buildings.