骨架膜装配式节点设计与承载力分析  

Design and bearing capacity analysis of skeleton membrane assembly joint

作　　者：李延民[1] 黄瑞 赵树森 王景玉 LI Yanmin;HUANG Rui;ZHAO Shusen;WANG Jingyu(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001

出　　处：《建筑结构》2024年第3期111-117,94,共8页Building Structure

基　　金：浙江省科技计划项目(2019C05008)。

摘　　要：提出的骨架膜结构装配式节点具有构造简单、预制程度高、便于现场装配、可以调节消减加工误差、适应各种形状的骨架膜结构、传力清晰等特点。基于Hertz接触理论分析了该节点的关键承载结构——销轴连接的应力分布形式并与有限元分析相互印证。基于有限元分析得出了该节点中杆件与耳板最佳的连接方式,对该节点的三维模型进行简化并建立有限元模型,计算了该节点的极限承载能力,得到其破坏形式并与同规格的空间相贯焊接钢管节点进行对比。结果表明:该装配式节点的失效由下弦杆控制,满足“强节点,弱杆件”的设计要求;该装配式节点的极限承载能力为设计荷载的2.95倍,与同规格的空间相贯焊接钢管节点几乎相同,有充足的安全余量,可以更加灵活地应用于各种建筑结构中。The proposed assembly joint with skeleton membrane structure has the characteristics of simple structure,high degree of prefabrication,easy on⁃site assembly,adjustable reduction of processing errors,adaptability to various shapes of skeleton membrane structures and clear force transmission.Based on Hertz contact theory,the stress distribution form of the key load⁃bearing structure of the joint—the pin axis connection was analyzed and verified by finite element analysis.Based on the finite element analysis,the best connection mode between the bar and the trunnion plate in the joint was obtained,the three⁃dimensional model of the joint was simplified and the finite element analysis model was established.The ultimate bearing capacity of the joint was calculated,and its failure mode was obtained,which is compared with that of the spatially penetrated welded steel pipe joint of the same specification.The results show that the failure of the assembly joint is controlled by the lower chord and meets the design requirements of“strong joint,weak member”.The ultimate bearing capacity of the assembly joint is 2.95 times of the design load and almost the same as that of the spatially penetrated welded steel pipe joint of the same size,it has sufficient safety margin and can be more flexibly applied in various building structures.

关 键 词：装配式节点 骨架膜结构 销轴连接 HERTZ接触理论 有限元分析 承载能力 

分 类 号：TU392.73[建筑科学—结构工程] TU318.1TU312.1