直榫节点的可拆卸式加固方法的试验研究  

Experimental study on the disassembling reinforcement method of the straight tenon joint

作　　者：王文波 邱洪兴[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《苏州科技大学学报（工程技术版）》2017年第A01期153-157,共5页Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）

基　　金：国家十二五科技支撑项目（2012BAJ14B02）

摘　　要：我国许多现存的古建木结构使用年限已久,榫卯节点是古建筑木结构中的关键部分,脱榫是该类型结构的 主要破坏形式.了解榫卯节点加固后的力学性能是研究古建木结构整体性能的基础.文章在总结现有研究成果的基 础上,对榫卯节点扁钢加固后的抗弯性能进行了试验研究.论文进行了 3个扁钢加固的直榫节点的单调荷载试验. 试验结果表明：节点均发生榫头屈服破坏,枋端、柱端完好无损且应力较小,试验得到的节点弯矩与转角（M-0）曲线 呈现“上升-平缓-下降”三个阶段,随着荷载增加刚度逐步下降.钢箍加固后节点承载力的提升幅度大于刚度的提 升幅度,挤压变形较大,总体呈现半刚性模式,拔榫量与转角成线性关系.Large numbers of exiting ancient timber structures have been in services for lots of years and most of them have been greatly damaged. The typical damage mode of straight tenon was tenons pulled out for mortises, while the beams and columns were intact.Therefore understanding the mechanicalproperties of the reinforced mortise-tenon joint is the basis of studies on tenon-mortise joints. The flexural behavior of the tenon joints rein-forced by steel plat was studied in this paper after summarize and analyze the existing achievements. In this pa-per, 3 joints strengthened by steel hoop were tested by monotonic loading. The results of joints tests showed that： the typical damage mode of straight tenon was tenons get yield, while the beams and columns were intact, on the basis of the tests results. The curve performed as three sections of broken lines, which is divided into ＂rising, horizontal, descent＂ three section. With the increase of load, the stiffness decline gradually. The bearing capacity of joints increases greater than the stiffness after reinforced with steel hoop, tenon and mortise extruded deforma-tion obviously, such as the semi-rigid model.,and the relationship between the tenon-pulling-out length and rota-tion was linear.

关 键 词：古建木结构 直榫节点 单调加载试验 扁钢加固 受弯性能 

分 类 号：TU366[建筑科学—结构工程]