不同拔榫程度的古建筑燕尾榫节点受力性能分析  

Mechanical behavior on dovetail mortise-tenon joints with different pulling-out in ancient buildings

作　　者：李义柱 曹双寅[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《四川建筑科学研究》2017年第3期1-4,共4页Sichuan Building Science

基　　金："十二五"国家科技支撑计划课题(2012BAJ14B02)

摘　　要：现存的古建筑燕尾榫节点中容易出现拔榫现象,为研究拔榫对燕尾榫节点受力性能的影响,利用ABAQUS软件对拔榫节点进行了有限元分析,得到了燕尾榫节点的弯矩-转角曲线和节点的应力分布状态,并针对拔榫程度对节点转动刚度和承载力的影响进行了分析。结果表明:燕尾榫节点的受力可分为弹性段和强化段;榫头和卯口在顺纹方向均未达到屈服,而在横纹方向上已进入强化段;随着节点拔榫程度的增大,节点的弹性刚度、强化段刚度及承载力均减小,且随着节点拔榫程度的增加,其减小的幅度在降低。研究可为燕尾榫节点的加固提供一定的参考。The pulling-out of dovetail mortise-tenon joint is familiar in existing ancient buildings. To study the influence of pulling-out on the seismic behavior of dovetail mortise-tenon joints, the finite element analysis using the software ABAQUS for dovetail joints were conducted. The moment-rotation curves and stress distribution of dovetail joints were obtained. The results showed that moment-rotation curves could be divided into elastic stage and strengthening stage. The stress parallel to grain was less than the tensile strength along the grain, while the stress perpendicular to grain was far larger than the compressive strength perpendicular to grain. With the increase of the pulling-out of tenon, the elastic stiffness, strengthening stiffness and bearing capacity decreased obviously. And the reduction of them decreased as the increase of pulling-out of tenon. The research can be used as reference for the reinforcement of dovetail mortise-tenon joints.

关 键 词：古建筑 燕尾榫节点 拔榫 转动刚度 

分 类 号：TU366.2[建筑科学—结构工程]