东南大学学报（自然科学版）2012，Vol.42Issue(3)：536-541,6.DOI:10.3969/j.issn.1001-0505.2012.03.028
一种新型自复位防屈曲支撑的拟静力试验
Cyclic tests of novel self-centering buckling-restrained brace
摘要
Abstract
An innovative self-centering energy dissipation device called self-centering buckling-re-strained brace ( SCBRB) is put forward to control maximum and residual drift of steel frame structures subjected to severe earthquakes. The configuration and mechanics of this new system are explained. The design method of primary factors including prestressing force and deformation demands of prestressing tendons is outlined, and one realization of the system, which combines the merits of both self-centering devices and buckling restrained braces ( BRBs), is presented. From the cyclic test, it is found that the implementation and maintaining of the prestressing force in the prestressing tendons dominates the re-centering capacity of SCBRB. Too much loss of prestressing force weakens the self-centering capacity. The ratio between the total pretension force of the tendons and the total yield force of energy dissipation bars should be larger than 1. 3 to ensure fully self-centering. Results from the cyclic tests of SCBRBs and BRBs confirm the expected re-centering capacity of SCBRBs which eliminates main residual deformations.关键词
自复位/防屈曲支撑/残余变形/预应力/拟静力试验Key words
self-centering/ buckling restrained brace/ residual deformation/ prestressing force/ cyclic test分类
建筑与水利引用本文复制引用
刘璐,吴斌,李伟,赵俊贤..一种新型自复位防屈曲支撑的拟静力试验[J].东南大学学报（自然科学版）,2012,42(3):536-541,6.基金项目
国家自然科学基金资助项目(51161120360,90715036)、中央高校基本科研业务费专项资金资助项目(HIT.ICRST.2010016,HIT.BRET2.2010009). （51161120360,90715036）
