建筑钢结构进展2025，Vol.27Issue(6)：53-64,12.DOI:10.13969/j.jzgjgjz.20240203001
新型喷头式节点抗弯性能及其幂函数模型研究
Study on Bending Performance and Power Function Model of a New Sprayer Joint
摘要
Abstract
As a typical prefabricated joint,the traditional socket joint is used in large-span spatial grid structures.However,due to its small bending stiffness,its application range is limited.Based on this,the traditional socket is improved,and a sprayer joint with better bending performance is proposed.Firstly,the new sprayer joint is designed,and the finite element simulation of the sprayer joint and the socket joint under pure bending is carried out to compare their bending performance.Then,the influence of the radius of the surrounding bolt,the axial compression and the axial tension on the bending performance of the sprayer joint is studied.Finally,the power function model of moment-rotation curve of the sprayer joint is established,and the curvature coefficient of the model is obtained by simulated annealing algorithm.The relevant model parameters are determined by multivariate nonlinear fitting method,and the power function model is evaluated.The results show that the initial stiffness of the new sprayer joint is increased by 21.71 times,the ultimate bending moment is increased by 5.42 times,and the steel consumption is only increased by 15%compared with the traditional socket joint.With the increase of the radius of the surrounding bolt,the initial stiffness of the joint increases slowly and the ultimate bending moment increases significantly.With the increase of axial compression,the initial stiffness and ultimate bending moment of the joint also increase gradually.Increasing the axial tension will significantly reduce the initial stiffness and ultimate bending moment of the joint.When the axial tension reaches a certain value,the joint will appear obvious bolt necking in advance.The axial force has a great influence on the failure mode of the joint.The power function model can well fit the actual moment-rotation curve of the joint,and the characteristic parameters and their influence coefficients of the power function model are well fitted.The conclusions can provide references for the actual engineering design and calculation of the joint.关键词
传统碗式节点/新型喷头式节点/抗弯性能/失效模式/幂函数模型/模拟退火算法Key words
traditional socket joint/new sprayer joint/bending performance/failure mode/power function model/simulated annealing algorithm分类
建筑与水利引用本文复制引用
李韧,肖志成,李会军,李宝辉..新型喷头式节点抗弯性能及其幂函数模型研究[J].建筑钢结构进展,2025,27(6):53-64,12.基金项目
国家自然科学基金(51408490),陕西省自然科学基础研究计划(2022JM-234,2023-JC-YB-363),国家级大学生创新创业训练计划(202310712067) （51408490）
