东南大学学报（自然科学版）2017，Vol.47Issue(4)：743-750,8.DOI:10.3969/j.issn.1001-0505.2017.04.019
角钢拼接十字形无焊核心的高性能屈曲约束支撑试验研究
Experimental study on high-performance welding-free cruciform-shaped buckling-restrained braces with angle steel splicing core
摘要
Abstract
To avoid the reduction of low cycle fatigue performance due to welding in the steel core of cruciform cross-section of conventional buckling-restrained braces (BRBs), a new type of welding-free cruciform-shaped BRB with angle steel splicing core was developed.Uniaxial quasi-static cyclic tests for three BRB specimens were carried out to investigate the hysteretic behavior.The steel core of BRB consists of four combined angle steels with equal sides to form a welding-free cruciform cross-section using structure glue, to avoid uncontrollable defects from welding or directly casting.The test results indicate that this type of BRB specimens has stable hysteretic performance.Before the fracture of the first angle steel, the cumulative plastic deformation capacity of the specimens is much higher than that of the casting cruciform cross-section BRB and better than that of the rectangle cross-section BRB with end welding stiffening rib.After the fracture of the first angle steel, the rest sections of angle steel still have energy dissipation capacity.The tension and compression coefficients of the three specimens are all below 1.1, so the limit value of AISC 1.3 is satisfied.关键词
屈曲约束支撑/无焊十字形截面/低周疲劳/滞回性能Key words
buckling-restrained brace/welding-free cruciform-shaped core/low cycle fatigue/hysteretic behavior分类
建筑与水利引用本文复制引用
吴京,洪曼,郭立行..角钢拼接十字形无焊核心的高性能屈曲约束支撑试验研究[J].东南大学学报（自然科学版）,2017,47(4):743-750,8.基金项目
国家重点研发计划资助项目(2016YFC0701400)、国家自然科学基金资助项目(51278105). （2016YFC0701400）
