摘要
脊瓜柱-脊檩复合榫卯节点是一种普遍用于清式大木作建筑中的承重构件,对于建筑物整体的抗震性能有着不可忽视的影响。基于沈阳故宫文溯阁古建筑,以其中的脊瓜柱-脊檩节点为原型,通过对一足尺模型的拟静力试验,测得了对应的弯矩-转角滞回曲线,提取了骨架曲线和刚度变化曲线,分析了节点的受力变形特点和破坏模式,建立了相应的恢复力模型。试验结果表明节点的破坏形式为低周反复荷载作用下榫卯发生脱离以及垫板的面外偏斜,此时构件的各组成部分并未发生明显的弯曲和剪切破坏。最终的结论可以为文溯阁古建筑的有限元模拟提供必要的理论依据,也可为清式大木作古建筑的保护和修缮提供参考。
The composite mortise-tenon joint of king post and ridge purlin is a kind of load-bearing member widely used in large-scale timber buildings of Qing Dynasty, which has a significant impact on the seismic performance of the whole building. Based on the ancient building of Wensuge in Shenyang Imperial Palace, the pseudo static test was conducted on a full-scale model of the joint composed of king post and ridge purlin to measure the moment-rotation hysteretic curve, extract the skeleton curve and stiffness change curve, analyze stress deformation characteristics and failure mode of the joint, and establish the corresponding restoring force model. The test results show that the failure modes of the joint are the mortise-tenon separation and the out of plane deflection of the base plate under the action of low cycle cyclic loading, and there is no obvious bending and shear failure for each component of the component. The final conclusion can provide the necessary theoretical basis for the finite element simulation of Wensuge ancient building, and also provide reference for the protection and repair of Qing Dynasty ancient timber buildings.
作者
孙国军
赵益峰
薛素铎
李江
SUN Guojun;ZHAO Yifeng;XUE Suduo;LI Jiang(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;College of Fangongxiu Honors,Beijing University of Technology,Beijing 100124,China;College of Architecture and Urban Planning,Beijing University of Technology,Beijing 100124,China)
出处
《建筑结构》
CSCD
北大核心
2020年第16期82-86,共5页
Building Structure
基金
国家自然科学基金项目(51408011)
北京市教委科技一般项目(KM201710005018)。
关键词
古建筑
木结构
中国清式大木作梁架结构
脊瓜柱
脊檩
复合榫卯节点
ancient building
timber structure
Chinese timber beam frame structure of Qing Dynasty
king post
ridge purlin
composite mortise-tenon joint
