地震工程学报2017，Vol.39Issue(6)：1142-1149,8.DOI:10.3969/j.issn.1000-0844.2017.06.1142
端部加强型双重钢管屈曲约束支撑影响因素研究
Influencing Factors on End-enhanced Double-steel Tube Buckling Restrained Braces
摘要
Abstract
The influence of factors such as constraint ratio,gap-thickness ratio,and diameter-thickness ratio on the ultimate bearing capacity of end-enhanced double-steel tube buckling re-strained brace (BRB)is studied using ANSYS software to simulate monotonic loading.Through the secondary development of APDL,the critical constraint ratio value range,critical gap-thick-ness ratio,and critical diameter-thickness ratio are analyzed.The results show that the constraint ratio is an important factor affecting the stability of BRBs and should not be less than 1.5 without considering initial imperfections.When the constraint ratio meets this requirement,the upper limit of the critical gap-thickness ratio decreases with an increase in the diameter-thickness ratio of the core tube,and the change trend is close to a straight line.The critical gap-thickness ratio should not be more than 0.18.When the constraint ratio meets this requirement,the critical di-ameter-thickness ratio decreases with an increase in the gap-thickness ratio,and the critical diam-eter-thickness ratio should not be more than 29.When the diameter-thickness ratio is too large (more than 29),it is prone to high order buckling and failure,resulting in full-section yielding.关键词
双重钢管/屈曲约束支撑/构造参数/极限承载力Key words
double-steel tube/buckling restrained brace/structural parameters/ultimate bearing capacity分类
建筑与水利引用本文复制引用
王永贵,宋红弟..端部加强型双重钢管屈曲约束支撑影响因素研究[J].地震工程学报,2017,39(6):1142-1149,8.基金项目
河南省科学技术重点项目(14A560001) （14A560001）
河南省教育厅自然科学基金(2011B560007) （2011B560007）
河南理工大学博士基金(B2015-69). （B2015-69）
