榫卯式毂节点半刚性单层球面网壳稳定性及地震响应分析  

Stability and dynamic performance analysis of semi⁃rigid single⁃layer spherical reticulated shell with triodetic joints

作　　者：王星 张献 Wang Xing;Zhang Xian(Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学,广州510006

出　　处：《土木工程学报》2024年第10期1-10,共10页China Civil Engineering Journal

基　　金：国家自然科学基金(51678313);广东省高校重点科研项目(2019KZDXM050);广州市科技计划项目(202102010457)。

摘　　要：近年来,国家大力推广工厂化建筑,而节点作为单层球面网壳的关键性构件,其受力性能直接影响网壳的稳定性和抗震性能,探索一种受力性能良好的装配式节点成为趋势。该文在一种新型装配式节点-榫卯式毂节点简化模型的基础上,进行实际整体模型的分析,并把起拱角度也作为参数代入到刚度公式中进行修正,得到榫卯式毂节点考虑起拱角度的整体模型的刚度计算公式。通过ANSYS自编命令流程序建立单层球面网壳模型,采用combin39单元来模拟榫卯式毂节点的面外和面内刚度,对其进行稳定性和地震响应分析,考虑不同起拱角度引起的不同节点刚度及常用网壳跨度和矢跨比对网壳稳定性和地震响应的影响。通过大量的算例分析,较为全面的掌握了采用榫卯式毂节点这类半刚性节点的K8型单层球面网壳的稳定性能和动力性能。In recent years,the country has vigorously promoted factory buildings.As the key components of single⁃layer spherical reticulated shells,the mechanical properties of nodes directly affect the stability and seismic performance of reticulated shells.In this work,based on a simplified model of a new prefabricated triodetic joint,the analysis of the actual entire model is carried out,and the arching angle is also substituted into the stiffness formu⁃la as a parameter for correction,and the formula of calculating the stiffness of the entire model considering the arching angle for the triodetic joint is obtained.The single⁃layer spherical reticulated shell model is established through the self⁃developed command stream program in ANSYS,and the element of combin39 is utilized to simulate the out⁃of⁃plane and in⁃plane stiffnesses of the triodetic joints,and the stability and dynamic performance of the reticulated shell model are analyzed,with the effects of different joint stiffnesses caused by different arching angles,common spans and rise⁃span ratios of reticulated shells being con⁃sidered.Through the analysis on a large number of examples,the stability and dynamic per⁃formance of the K8 single⁃layer spherical reticulated shell with semi⁃rigid joints such as trio⁃detic joints are comprehensively investigated.

关 键 词：榫卯式毂节点 半刚性节点 稳定性分析 自振特性 时程分析 

分 类 号：TU393.3[建筑科学—结构工程]