摘要
以传统民居穿斗式木结构直榫边节点为研究对象,分析节点承载机制,并设计制作3套杉木结构直榫边节点足尺试件(对照组1套、扒钉加固1套、角钢加固1套),进行低周往复加载试验。研究结果表明:直榫边节点破坏模式主要表现为节点木材横纹压屈变形和节点拔榫,滞回曲线轮廓均呈反“Z”形状,且呈现较明显的捏缩现象。与未加固节点相比,加固节点的承载性能均有所提高;扒钉加固节点在扒钉脱落失效前提高了节点刚度、累积耗能及变形能力,角钢加固节点在穿枋断裂前显著提高了节点刚度、累积耗能及变形能力。
The Chuan-dou joints of traditional residential timber structures were studied in this research project.The bearing mechanism of joints were analyzed.Three sets of full-scale test specimens of the straight tenon-type joints of the Chuan-dou style timber structure were designed and produced:one set was as the control group,the second set was reinforced with nails,and the third set was reinforced with angle steels.Cyclic loading tests were conducted.The results showed that the failure mode of the straight tenon-type joint was mainly caused by the partial compressive plastic deformation perpendicular to the grain and the pull-out of tenon.All of the hysteretic curves were in the reverse"Z"shape,and showed distinct pinch phenomena.Compared with the control group,the load-bearing performance of reinforced joints were improved.The nail-reinforced joints improved the stiffness,energy dissipation,and the deformation capacity before the nails fell off.The angle-steel reinforced joints significantly improved the stiffness,energy dissipation,and the deformation capacity before the girder fractured.
作者
王双永
郭婷
邓昊
周海宾
WANG Shuang-yong;GUO Ting;DENG Hao;ZHOU Hai-bin(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《木材科学与技术》
北大核心
2022年第1期57-62,共6页
Chinese Journal of Wood Science and Technology
基金
“十三五”国家重点研发计划“结构用木质材料制造及其在传统民居中的应用示范”(2018YFD0600303)
山西省重点研发计划(社会发展)项目“晋系早期木构古建筑保护与修复关键技术研究”(201803D31048)。
关键词
穿斗式木结构
直榫边节点
加固
承载性能
Chuan-dou style timber structure
straight tenon-type joints
reinforcement
seismic performance
作者简介
王双永(1988-),男,助理研究员。Email:tzlswsy@163.com;通讯作者:周海宾,男,研究员。Email:dvchow@126.com。
