(1 机械工业勘察设计研究院有限公司, 西安 710043; 2 西安建筑科技大学土木工程学院,西安 710055)

摘要: 木柱直接立于柱础石上是传统木结构中柱脚节点最常见的连接样式. 在水平反复荷载作用下,由于木柱与础石之间一般不存在任何的连接,木柱会以柱脚与柱础石相接触的边缘点为转动支点发生转动,进而产生摇摆,其在摇摆状态下的受力性能对整个结构的稳定发挥了积极的作用. 为研究传统木结构柱脚节点在地震作用下的转动性能,以浮搁柱础连接为研究对象,首先分析了木柱在水平反复荷载作用下的受力机理,建立了柱脚节点理论计算公式;随后依据柱脚滞回曲线的特点,提出了含有柱脚弹簧单元的木柱杆系有限元分析模型. 结果表明:柱脚节点力学模型的计算结果与试验曲线吻合良好;木柱杆系有限元分析模型有效地反映了木柱在摇摆状态下的滞回特点.

关键词: 传统木结构; 柱脚节点; 力学模型; 转动性能; 试验验证

中图分类号:TU366. 2 文献标志码:A 文章编号:1002-848X(2023)08-0132-05

DOI:10. 19701 / j. jzjg. 20210386

Study on mechanical model and finite element model of column base joint in traditional timber structure

WANG Long1,2, QIAN Chunyu1, LI Junlian1, ZHANG Kai1, XIE Qifang2

(1 China Jikan Research Institute of Engineering Investigation and Design Co. , Ltd. , Xi’ an 710043, China;2 School of Civil Engineering, Xi’ an University of Architecture and Technology, Xi’ an 710055, China)

Abstract: Timber column is directly placed on the stone base in traditional timber structure, which is the most commonform of column base joints. Timber column can rotate around the edge of column foot in contact with stone base underhorizontal cyclic loads due to no connections between the timber column and the stone base, which produce the swing. Themechanical behavior of the timber column in the rocking state plays an active role in the stability of the whole structure. Thefoundation column directly above was selected to study the rotation performance of column base joint in traditional timberstructure under earthquakes. Firstly, based on the analysis of the force mechanism of the timber column under horizontalcyclic loads, the theoretical calculation formula of column foot joint was established. Subsequently, according to thecharacteristics of its hysteretic curve of column foot, beam-spring finite element model, including spring element on columnbase joint, was established. The results show that the calculated results from the proposed model of column base joint werein good agreement with experimental results. The beam-spring finite element model effectively reflects the hystereticcharacteristics of the timber column in the swaying state.

Keywords:traditional timber structure; column base joint; mechanical model; rotational performance; test verification

∗国家自然科学基金项目(51878550),西部绿色建筑国家重点实验室自主研究课题(LSZZ202116),机勘院科技研发基金项目(11740901120200048).

第一作者:王龙,博士,工程师,主要从事古建筑抗震与结构振动控制研究,Email:wangyglg@ 163. com.

[引用本文] 王龙,钱春宇,李俊连,等. 传统木结构柱脚节点力学模型及有限元模型研究[J]. 建筑结构,2023,53(8):132-136. WANG Long,QIAN Chunyu,LI Junlian,et al. Study on mechanical model and finite element model ofcolumn base joint in traditional timber structure[J]. Building Structure,2023,53(8):132-136.