网架组合杆件屈曲后性能研究  

RESEARCH ON POST-BUCKLING PERFORMANCE OF COMPOSITE MEMBERS OF SPACE TRUSS

作　　者：李超 王孟鸿 曹笑楠 张硕 LI Chao;WANG Menghong;CAO Xiaonan;ZHANG Shuo(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;The Quality Inspection Station of Housing Construction Bureau,Wangdu County,Baoding 072450,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]望都县住建局质监站,河北保定072450

出　　处：《钢结构（中英文）》2019年第10期10-15,共6页Steel Construction（Chinese & English）

基　　金：国家自然科学基金项目(51578038)

摘　　要：目前,大跨度空间网架组合杆件的设计与计算都是依据单根杆件的简化模型进行的,未考虑构件与构件之间的组合效应,计算长度系数通常取1,与实际受力情况有所不同。利用数值模拟与试验相结合的方法对组合杆件的屈曲后性能进行研究,考虑初始缺陷以及构件与构件之间组合效应的影响,运用ABAQUS有限元软件对组合杆件的滞回性能进行模拟分析,并通过试验验证了模拟结果的正确性,最终得到组合杆件的计算长度系数以及滞回模型。At present,the design and calculation of composite members of long-span space truss are based on the simplified model of single member.In this way,the combined effect between members and members is not considered,and the effective length coefficient of composite members is usually 1,which is different from the condition of practical structure.In the paper,the post-buckling behavior of composite members was studied by combining simulation with experiment.Considering the initial defects of composite members and the combined effect between members and members,the hysteretic behavior of composite members was simulated and analyzed by ABAQUS finite element software,and the results of finite element simulation were verified by experiments.Finally,the effective length coefficient of composite members and the elastic-plastic hysteretic model of composite members were obtained.

关 键 词：组合杆件 初始缺陷 计算长度系数 滞回模型 

分 类 号：TF[冶金工程]