嵌入式毂节点刚度及其单层球面网壳承载力研究  

RESEARCH ON STIFFNESS OF HUB-SHAPE INLAY JOINT AND BEARING CAPACITY OF SINGLE-LAYER SPHERICAL RETICULATED SHELL

作　　者：张晓磊 李会军[1] 陈旭 朱志强 喻晓晨 ZHANG Xiao-lei;LI Hui-jun;CHEN Xu;ZHU Zhi-qiang;YU Xiao-chen(College of Water Resources and Architectural Engineering,Northwest A&F University,Shaanxi,Yangling 712100,China;Shennan Industry Development Co.,Ltd,Shaanxi,Yulin 719300,China)

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]陕煤集团神南产业发展有限公司,陕西榆林719300

出　　处：《工程力学》2022年第9期179-190,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51408490);陕西省自然科学基础研究计划项目(2022JM-234);中央高校基本科研业务费专项资金项目(2452020168);教育部产学合作协同育人项目(202002116001);国家级大学生创新创业训练计划项目(S202010712197)。

摘　　要：嵌入式毂节点是我国自行设计研制出来的一种新型装配式节点,具有施工方便、外形流畅、定位精度高等优点,属于典型的半刚性节点。但目前对此类节点的研究尚不够深入,现有规范尚未涉及此类半刚接单层球面网壳的相关理论计算公式和设计要求。基于此,采用ANSYS软件建立了嵌入式毂节点的精细化模型,基于幂函数模型拟合了节点的弯矩-转角公式,同时,探讨了不同跨度和矢跨比下节点刚度对单层球面网壳稳定承载能力的影响。研究表明:嵌入式毂节点在平面外弯曲时的弯矩-转角曲线以及在扭转作用时的扭矩-转角曲线均与幂函数模型吻合良好;网壳结构承载力对节点弯曲刚度的敏感程度要大于节点轴向刚度,且极限承载力对节点刚度的敏感程度会随着结构跨度或矢跨比的增大均呈现减弱的趋势。The hub-shape inlay joint is a new type of assembled joint designed and developed in China,and has the advantages of convenient construction,smooth shape and high positioning accuracy,and it belongs to a typical semi-rigid joint.However,the research on this kind of joints is limited,and existing codes do not contain the relevant theoretical calculation formulas and design requirements for the semi-rigid single-layer spherical reticulated shell.Recognizing the aforementioned issues,a refined model of the hub-shape inlay joint is established by ANSYS package,and the moment-rotation curve of the joint is fitted based on the power function model.Meanwhile,the influence of joint stiffness on ultimate bearing capacity of the semi-rigid shell with different spans and rise-to-span ratios is discussed in detail.The results show that the moment-rotation curves of the hub-shape inlay joints in out-of-plane bending and torsional bending are in good agreement with the power function model.The sensitivity of the ultimate bearing capacity of shell to the bending stiffness of the joints is greater than the axial stiffness of the joints,and the sensitivity of the ultimate bearing capacity to the stiffness of the joints will get weaker with the increase of the span or rise-to-span ratio of the shell.

关 键 词：嵌入式毂节点 节点刚度 幂函数模型 半刚接单层球面网壳 极限承载力 

分 类 号：TU393.3[建筑科学—结构工程]