江南地区抬梁木构建筑馒头榫节点受力性能研究  

Research on Mechanical Properties of Mantou Mortise-tenon Joints in the Post-and-lintel Constructions of the Traditional Timber Buildings in the South Yangtze River Regions

作　　者：淳庆[1,2] 潘建伍[3] 

机构地区：[1]东南大学建筑学院,江苏南京210096 [2]东南大学城市与建筑遗产保护教育部重点实验室,江苏南京210096 [3]南京航空航天大学土木工程系,江苏南京210016

出　　处：《四川大学学报（工程科学版）》2015年第5期23-29,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金重点资助项目(51138002);中央高校基本科研业务费专项资金资助(2242013R30001)

摘　　要：为研究江南地区抬梁式木构建筑馒头榫节点的受力性能,通过节点试验获取该种榫卯节点在低周反复荷载作用下的破坏模式、滞回曲线、骨架曲线、转角刚度;综合考虑馒头榫节点的接触非线性和木材材料的非线性,采用ANSYS非线性有限元方法对其受力性能进行理论分析。结果表明:该种榫卯节点的滞回曲线基本都呈"Z"形,具有明显的捏拢特性;该种榫卯试件均经历了弹性阶段、屈服阶段和破坏阶段;此外,ANSYS有限元分析结果和试验结果较为吻合,通过分析,获取了馒头榫节点的平面内(竖向)转角刚度K1、平面外(水平)转角刚度K2和扭转刚度K3的相互关系,可近似归纳为12∶1∶2。研究结果可为江南地区抬梁式木构建筑的计算分析及保护修缮提供理论基础。In order to study the mechanical properties of the Mantou mortise-tenon joints in the post-and-lintel constructions of the ancient traditional timber buildings in the South Yangtze River Regions, the failure modes, hysteretic curves, skeleton curves, and rota- tion rigidities of the Mantou mortise-tenon joints under low cyclic loading were studied experimentally. Furthermore,with the considera- tion of the nonlinear contact influence of the mortise-tenon joint and the nonlinear stress-strain behavior of the timber material, the me- chanical properties of the Mantou mortise-tenon joints were analyzed by ANSYS software. The results showed that the hysteretic curves of the Mantou mortise-tenon joints appear to be Z shape and have obvious pinch effects. During the process of the test,these mortise-tenon joints orderly pass through the elastic stage, yieid stage and failure stage. The theoretical results agree well with the experimental re- sults. The relationship among the in-plane rotational rigidity K1 , out-of-plane rotational rigidity K2 and tortional rigidity K3 of the Mantou mortise-tenon joint is achieved and the ratio of them is about 12： 1： 2. The results could provide the theoretical base for computing analy- sis and repair design of the traditional timber buildings in the South Yangtze River Regions.

关 键 词：传统建筑 抬梁式木构建筑 馒头榫 受力性能 非线性有限元 

分 类 号：TU366.2[建筑科学—结构工程]