建筑结构学报2026，Vol.47Issue(8)：224-235,12.DOI:10.14006/j.jzjgxb.2025.0541
木楔和木质摩擦阻尼器协同增强松动榫卯节点抗震韧性提升研究
Study on seismic resilience improvement of loose mortise-tenon joints reinforced by timber wedges and wooden friction damper
摘要
Abstract
Looseness damage will significantly decrease the seismic behavior of the mortise-tenon(M-T)joints or timber frames,threatening the safety of ancient timber buildings.To improve the load-bearing and energy dissipation capacities of the loose M-T joints,a Que-ti shaped wooden friction damper,which conformed to the principles of conservation and restoration for the ancient building,was developed.An intact joint,one loose joint,and two joints reinforced by the timber wedge and damper were designed and subjected to cyclic loading tests.The failure modes,moment-rotation hysteretic and envelope curves,stiffness and load-carrying capacity degradation curves,and equivalent viscous damping coefficient were obtained.The effects of the synergistic reinforcement with the timber wedge and damper on the failure mechanism,the load-carrying and energy dissipation behaviors,tenon pull-out,and deformation capacity were examined.The test results indicate that the dampers provide moment-resisting and dissipate seismic energy through frictional sliding of wooden friction pads under the bolt preloads.Compared with the intact joint,the loose joint displays more severe tenon pull-out and mortise indentation but less tenon compression deformation,while the failure modes of the reinforced joints are characterized by minor tenon pull-out,localized crushing at the mortise edges,wear and plastic deformation around the bolt holes of wooden friction pads,and partial embedded compressive deformation of timber wedges.The hysteresis curves of the strengthened joints display no slip segments and are fuller compared with those of the loose joint.With identical tightness of timber wedges,increasing the damper's bolt preload not only effectively mitigate the degradation level of rotational stiffness and load-carrying capacity of the loose joint,but also significantly enhance their moment resistance.Compared with the loose joints,the reinforced joints' moment resistance,initial rotational stiffness,ductility,and energy dissipation capacity increase by 31％,46％,150％,and 86％,respectively.The rotation of the joint after reinforcement is up to 1/6.25,showing good rotational deformation capacity.The synergistic reinforcement strategy combining the timber wedge and damper can also significantly decrease the tenon pull-out of the loose M-T joint.关键词
古建筑木结构/松动榫卯节点/木质摩擦阻尼器/木楔嵌补/滞回性能/韧性提升Key words
ancient timber structure/loose mortise-tenon joint/wooden friction damper/timber wedge filling/hysteretic behavior/resilience enhancement分类
建筑与水利引用本文复制引用
张保壮,宋晓滨,方昉,汪伟,江海..木楔和木质摩擦阻尼器协同增强松动榫卯节点抗震韧性提升研究[J].建筑结构学报,2026,47(8):224-235,12.基金项目
安徽省建筑抗震减灾与绿色运维重点实验室(安徽省建筑科学研究设计院)资助课题(2024-JKYL-005),中国博士后科学基金面上项目(2024M762410). （安徽省建筑科学研究设计院）
