建筑结构学报2024，Vol.45Issue(8)：168-179,12.DOI:10.14006/j.jzjgxb.2023.0358
考虑变形损伤的足尺燕尾榫节点抗震性能试验及恢复力模型研究
Seismic performance test and resilience model of full size dovetail joint considering deformation damage
摘要
Abstract
In order to study the effect of internal deformation damage on the seismic performance of dovetail joint,three groups of full-size larch dovetail joints,with 0％,15％and 30％tenon reduction,were fabricated.Vertical quasi-static test and acoustic emission test were carried out to analyze the hysteresis and skeleton curves of each joint and the pulled out amount of each joint.According to the measured AE parameters,the deformation damage mode and damage evolution equation of each stage of the joints were analyzed.And the influence of deformation damage on the restoring model of joints was also studied.The results show that with the increase of the rotation,the bending moment of the joint first increases and then decreases,the bearing capacity decreases,the amount of tenon pulling increases and the stiffness of the joint gradually decreases.The loading process can be divided into slight damage stage,medium damage stage and severe damage stage according to the hysteretic curve characteristics.At the stage of slight damage,tensile damage dominates,and when entering the stage of moderate damage and severe damage,shear damage of specimens increased obviously,and the damage level of each joint increases with the increase of the relative stress ratio.The restoring model of the joint in mild and moderate damage stages is elastic-yield model.The restoring model of the joint in severe damage stage is slip-restoring model.The yield stiffness of the joints with different weakening degrees is 52.76％,35.36％and 69.79％of the elastic stiffness,and the recovery stiffness is 41.42％,62.14％and 34.58％of the elastic stiffness,respectively.With the increase of the degree of loosening,the angle ductility coefficient increases,the shear damage appears earlier,and the joint stiffness decreases obviously under the same damage level.关键词
古建筑木结构/足尺燕尾榫节点/拟静力试验/滞回性能/恢复力模型/变形损伤Key words
ancient timber structures/full-size dovetail-tenon joint/quasi-static test/hysteretic behavior/resilience model/deformation damage分类
建筑与水利引用本文复制引用
白福玉,范则楷,薛建阳,胡成明,吴晨伟,李加旭..考虑变形损伤的足尺燕尾榫节点抗震性能试验及恢复力模型研究[J].建筑结构学报,2024,45(8):168-179,12.基金项目
国家自然科学基金青年科学基金项目(51908454). （51908454）
