摘要
为了解木结构建筑不同节点形式抗震性能与受力特性,通过ABAQUS有限元软件建立了透榫和燕尾榫两种榫卯节点,柱脚节点分别为柱脚固接、柱脚带销节点(管脚榫)以及柱脚平置浮搁的木构架模型。在不同单柱轴力的情况下对其进行低周往复荷载模拟,研究木构架循环受力过程的柱脚应力分布特征以及抗震性能,探讨不同轴力、不同柱脚节点、不同榫卯节点对木构架的影响,并基于骨架曲线提出了柱脚平置浮搁木构架的水平荷载-水平位移简化双折线模型。结果表明:在往复荷载下,当柱脚节点为管脚榫和柱脚平置浮搁时,木构架会类似于摇摆柱,表现为柱脚翘起,反复抬升。相对于柱脚固接与透榫木构架,管脚榫、柱脚平置浮搁与燕尾榫木构架的滞回曲线更加饱满,耗能能力更强。柱脚固接木构架有更强的刚度与水平承载力。随着轴力的上升,木构架的刚度与水平承载力也随之上升。研究成果可为传统木结构建筑的保护与状态评估提供基础。
In order to understand the seismic performance and mechanical characteristics of different joint forms of wood structure buildings,two tenon and tenon joints types including through tenon and dovetail tenon based on abaqus finite element software were established.The column foot joints were the column foot fixed connection,the column foot with pin joint(pin and tenon),and a model of a wooden frame with the pedestal resting flat.The low-cycle reciprocating load simulation was carried out on the single column under the condition of different axial forces,and the stress distribution characteristics and seismic performance of the column foot during the cyclic force process of the timber frame were studied.The results showed that under the reciprocating load,when the joints of the column feet was tenon and the column feet was flat and floating,the wooden frame was similar to a rocking column.The column feet were lifted up and repeatedly lifted.Compared with the fixed column foot and the through tenon wood frame,the hysteresis curve of the foot tenon,the column foot flat floating shelf and the dovetail tenon wood frame was fuller,and the energy consumption capacity was stronger.Column foot fixed wood frame showed stronger rigidity and horizontal bearing capacity.With the increase of the axial force,the stiffness and horizontal bearing capacity of the wooden frame also increased.
作者
刘伟
陈波
黄勇
车方涛
周志鹏
LIU Wei;CHEN Bo;HUANG Yong;CHE Fang-tao;ZHOU Zhi-peng(College of Architecture and Urban Planning,Guizhou University,Guiyang 550023,Guizhou,P.R.China;Guizhou University Institute of Investgation&Design Co.,Ltd.,Guiyang 550025,Guizhou,P.R.China)
出处
《林产工业》
北大核心
2023年第5期59-67,共9页
China Forest Products Industry
基金
国家自然科学基金项目(52068009)。
关键词
木构架
有限元
抗震性能
榫卯
柱脚节点
Timber frame
Finite element
Seismic performance
Tenon and mortise
Column foot
