X型节点单层柱面胶合木网壳结构稳定性研究  

Study on the Stability of Single-layer Cylindrical Glued Timber Reticulated Shell with X-shaped Joints

作　　者：徐铭溪 张俊苹 钟杰 XU Mingxi;ZHANG Junping;ZHONG Jie(College of Architecture and Environment,Sichuan University,Chengdu,Sichuan610065,China;Southwest Branch of China Construction Eighth Engineering Division Co.,Ltd.,Chengdu,Sichuan610041,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]中国建筑第八工程局有限公司西南分公司,四川成都610041

出　　处：《施工技术（中英文）》2024年第3期83-93,109,共12页Construction Technology

基　　金：国家自然科学基金(52008274);中国地震局工程力学研究所基本科研业务费专项资助项目(2021D23)。

摘　　要：对使用X型节点的单层柱面胶合木网壳结构静力稳定性进行研究,通过有限元模拟研究节点内部接触面摩擦系数、螺栓预紧力和节点轴力对节点初始抗弯刚度的影响,并分析节点初始抗弯刚度、节点刚度比、初始几何缺陷系数、荷载布置方式和支座形式对单层柱面胶合木网壳稳定性的影响。研究结果表明,节点轴力对节点初始抗弯刚度和极限弯矩的影响较明显,节点初始抗弯刚度和节点刚度比对网壳极限承载力和失稳模态均有较大影响,节点初始抗弯刚度和荷载分布形式对无檩条和有檩条网壳极限承载力的影响较大,有檩式网壳稳定性对初始几何缺陷更敏感。This paper focused on the static stability of single-layer cylindrical glued timber reticulated shells with X-shaped joints.The effect of friction coefficient of contact surfaces,bolt pretension and axial force of the X-shaped joints on the bending performance is analyzed via finite element simulations.Subsequently,stability analysis is performed on the single-layer cylindrical glued timber reticulated shell,considering the influences of joint bending stiffness,joint stiffness ratio,initial imperfections,load distributions and support forms on shell stability.The results are as follows,the influence of axial force on the initial bending stiffness and the ultimate bending moment of the joint is obvious.The initial bending stiffness and joint stiffness ratio have a great influence on the ultimate bearing capacity and buckling modes of the reticulated shells.The initial bending stiffness and load distribution form of the joint have a great influence on the ultimate bearing capacity of the reticulated shell without purlin and with purlin.The shells with purlins are more sensitive to the initial imperfections.

关 键 词：柱面网壳 胶合木 半刚性节点 弯矩 转角 荷载 位移 

分 类 号：TU366[建筑科学—结构工程]