防灾减灾工程学报2026，Vol.46Issue(1)：56-64,121,10.DOI:10.13409/j.cnki.jdpme.20250916001
古建木结构"松动+虫蛀"燕尾榫力学性能试验
Experimental Study on Mechanical Behavior of"Loosening and Insect Infestation"Dovetail Joints in Chinese Historic Timber Structures
摘要
Abstract
To investigate the degradation pattern of the mechanical properties of mortise-tenon joints in Chinese historic timber structures under the combined effects of different damage types,the typical damage form of"loosening+insect infestation"was selected.A total of four dovetail joint specimens with a scale ratio of 1:3.2 were designed and fabricated,including one intact specimen and three specimens with different degrees of"loosening+insect infestation"damage.Low-cycle reversed load-ing tests were conducted on these specimens.Based on the test observations and measured data,the mechanical properties of the specimens were analyzed,including failure characteristics,hysteretic be-havior,bearing capacity,deformation performance,and stiffness and strength degradation.The re-sults showed that the mechanical properties of the dovetail joints exhibited more pronounced degrada-tion with an increased degree of damage.All specimens exhibited a"pinching"effect in their hysteretic curves,with the shape gradually transitioning from an inverted-S shape to a Z shape.As the degree of damage increased,the deformation performance and bearing capacity of the damaged joints decreased to varying degrees.Compared with the intact joint,the bearing capacity of the damaged joints de-creased by 18.70％to 39.72％,and the displacement ductility coefficient decreased by 16.26％to 31.62％.When the rotation angle was less than 0.025 rad,the stiffness of each specimen degraded rap-idly;when the rotation angle was greater than 0.03 rad,the strength of each specimen degraded rapid-ly.It is recommended that necessary strengthening measures be implemented for loosening-damaged mortise-tenon joints in engineering practice to prevent instability-induced collapse.关键词
古建木结构/残损性能/松动+虫蛀/燕尾榫节点/性能退化/拟静力试验Key words
Chinese historic timber structure/damage behavior/loosening and insect infestation/dove-tail joint/performance degradation/pseudo-static loading test分类
建筑与水利引用本文复制引用
杜鲁一,刘海鹏,李想,谢朋,董金爽..古建木结构"松动+虫蛀"燕尾榫力学性能试验[J].防灾减灾工程学报,2026,46(1):56-64,121,10.基金项目
国家重大科技计划项目(2019YFD1101003)、企业委托横向课题(JG-ZH-A-202411-003)、海南省自然科学基金项目(519QN190)资助 （2019YFD1101003）
