组装式防屈曲支撑整体稳定性研究  

RESEARCH ON OVERALL STABILITY OF ASSEMBLED BUCKLING-RESTRAINED BRACES

作　　者：丁玉坤[1,2] 鲍宗辉 李文文[1,2] 张文元[1,2] 张耀春[1,2] 宋罕宇 李达明 DING Yukun;BAO Zonghui;LI Wenwen;ZHANG Wenyuan;ZHANG Yaochun;SONG Hanyu;LI Daming(Key Lab of Structures Dynamic Behavior and Control of Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China;China Shanghai Architectural Design&Research Institute Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]哈尔滨工业大学,结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学,土木工程智能防灾减灾工业和信息化部重点实验室,哈尔滨150090 [3]中国建筑上海设计研究院有限公司,上海200063

出　　处：《工业建筑》2021年第2期66-70,105,共6页Industrial Construction

基　　金：国家自然科学基金(51878217);黑龙江省自然科学基金(E2017037);中建股份科技研发课题(CSCEC-2017-Z-(44))。

摘　　要：组装式防屈曲支撑通过内置钢板支撑承受轴向荷载,外部组装的约束构件为钢板支撑提供侧向约束,该种支撑可用于有抗震要求的中心支撑钢框架结构中。轴向受压的组装式防屈曲支撑的屈曲分析表明,可结合整个支撑的屈曲临界力、支撑长度和约束构件的抗弯刚度等,得到支撑的计算长度系数。非线性分析表明,约束构件的钢管外边缘屈服时的支撑轴向承载力与支撑发生极值点失稳时的极限承载力很接近。因此,可采用外部约束钢管边缘屈服来判断防屈曲支撑轴向受压整体失稳。为此,给出了综合考虑防屈曲支撑初弯曲、支撑屈服后承载力增大、约束构件抗弯刚度和强度以及间隙的相关算式,可用于验算支撑的整体稳定性。The assembled buckling-restrained brace,which resists axial loads by an inner plate brace while using outer assembled parts to provide the plate brace with lateral restraint,can be used in concentrically braced steel frames.Buckling analysis on the buckling-restrained brace in axial compression revealed that the effective length factors of brace could be obtain by considering critical load,length of brace,flexural rigidity of the restraining parts,etc.Nonlinear analysis revealed that the overall buckling of an assembled buckling-restrained brace had a peak load on the load-deformation curves,and the peak load was close to the load corresponding to the edge yielding of steel tube in outer assembled parts.Therefore,the overall buckling of brace under axial compression could be well evaluated by the edge yielding of restraining parts,and a correlation formula,which took into account initial crookedness,overstrength of the plate brace,flexural rigidity and strength of the restraining parts and clearance,could be provided to check the overall stability of brace.

关 键 词：防屈曲支撑 屈曲分析 相关算式 非线性分析 边缘屈服准则 

分 类 号：TU352.1[建筑科学—结构工程]