轻型木桁架结构加固与静力承载性能分析研究  

EXPERIMENTAL ANALYSIS OF STRENGTHENING AND STATIC LOADING OF A TIMBER TRUSS STRUCTURE

作　　者：李刚 易鑫 潘志成 刘敏 胡刚强 Li Gang;Yi Xin;Pan Zhi-cheng;Liu Min;Hu Gang-qiang

机构地区：[1]湖南华城检测技术有限公司,长沙410017 [2]湖南中腾土木工程技术有限公司,长沙410017 [3]中国水利水电第八工程局有限公司,长沙410004 [4]中电建池州长智建工有限公司,安徽池州247100 [5]岳阳市规划勘测设计院有限公司,湖南岳阳414000 [6]中国建筑第五工程局有限公司,长沙410000

出　　处：《建筑技术开发》2024年第5期18-21,共4页Building Technology Development

基　　金：池州市贵池区科技计划项目(GCKJ202210);安徽省重点研发计划项目(2022o07020003);安徽省住房城乡建设科学技术计划项目(2023-YF-112)。

摘　　要：研究通过SPA 2000软件对轻型木桁架结构进行了有限元受力分析,根据计算结果提出了相应的加固处理措施,并对加固后的木桁架进行荷载试验,以验证加固后的木桁架挠度、变形及应变值。结论总结如下:1)模拟分析表明该木桁架端部节点抗弯及抗剪承载力、木桁架下弦杆件抗拉承载力均不满足规范要求;2)对抗弯及抗剪承载力不足的桁架端部节点采取钢板封闭法进行加固,对抗拉承载力不足的下弦采用增设槽钢拉杆的加固方法;3)对加固后木桁架的各下弦杆中点,木桁架节点的变形(挠度)、木桁架各上弦、下弦杆件的应变等进行荷载试验检测,结果表明各参数指标均符合现行规范要求。A finite element stress analysis was conducted on a lightweight wooden truss structure using SPA 2000 software.Based on the calculation results,corresponding reinforcement measures were proposed,and load tests were conducted on the reinforced wooden truss to verify its deflection,deformation,and strain values.The conclusion is summarized as follows:1)simulation analysis shows that the bending and shear bearing capacity of the end nodes of the wooden truss,as well as the tensile bearing capacity of the lower chord members of the wooden truss,do not meet the requirements of the specifications;2)the end nodes of the truss with insufficient bending and shear bearing capacity are reinforced with steel plate closure method,while the lower chord with insufficient tensile bearing capacity is reinforced with channel steel tie rods;3)load tests were conducted on the midpoint of the lower chord members of the reinforced wooden truss,the deformation(deflection)of the wooden truss nodes,and the strain of the upper and lower chord members of the wooden truss.The results showed that all parameter indicators met the requirements of the current specifications.

关 键 词：轻型木桁架 有限元计算 受力分析 

分 类 号：TU366.2[建筑科学—结构工程]