圆木柱组装式钢托换节点受力性能试验研究  

Experimental study on bearing performance of round timber column assembled steel underpinning joints

作　　者：贾留东[1] 王庆文 岳明凯 张华梁 JIA Liudong;WANG Qingwen;YUE Mingkai;ZHANG Hualiang(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Sports Trainning Center,Jinan 250002,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东省体育训练中心,山东济南250002

出　　处：《山东建筑大学学报》2023年第3期22-28,共7页Journal of Shandong Jianzhu University

基　　金：国家自然科学基金项目(51278287)。

摘　　要：圆木柱组装式钢托换是木结构古建筑整体移位托换的关键技术。为研究托换节点的承载能力,设计了8个圆木柱组装式钢托换节点,考虑不同螺栓预紧力和结合面处理方式对托换节点抗剪承载力的影响,研究了不同工况下托换节点的受力特性、相对位移变化规律及极限承载力。结果表明:圆木柱组装式钢托换节点在轴向荷载作用下呈滑移破坏,增大其螺栓预紧力,圆木柱组装式钢托换节点极限承载力基本成线性增长;在圆木柱外表面刷漆处理导致结合面摩擦系数降低了约2.5%~17.2%,从而使托换节点承载能力降低了约5%~14.3%,该装置具有足够的安全储备和可重复使用性。据此提出了圆木柱组装式钢托换节点的托换承载力计算式,为木结构建筑移位工程中圆木柱的托换设计提供了一定参考。The round timber column assembled steel underpinning is the key technology of the overall displacement underpinning of ancient timber buildings.In order to study the bearing capacity of the underpinning joints,this paper designs 8 round timber column assembled steel underpinning joints to consider the the influence of different bolt pretightening forces and joint surface treatment methods on the shear capacity of underpinning joints.In addition,the bearing characteristics,relative displacement variation law and ultimate bearing capacity of underpinning joints under different working conditions are studied.The results show that the ultimate bearing capacity of the round timber column assembled steel underpinning joints increase linearly with the increase of bolt preload due to sliding failure under axial load.The painting treatment on the outer surface of the round timber column resulted in a reduction of the friction coefficient of the joint surface by about 2.5%~17.2%,thus reducing the bearing capacity of the underpinning joints by about 5%~14.3%.It is confirmed that the device have sufficient safety reserve and reusability.Based on the test results,a formula for calculating the underpinning capacity of round timber column assembled steel underpinning joints is proposed,which provides reference for the underpinning design of round timber columns in timber structure building displacement projects.

关 键 词：木结构 组装式钢托换节点 预紧力 结合面处理方式 托换承载力 

分 类 号：TU375.3[建筑科学—结构工程] TU366.2