东南大学学报（自然科学版）Issue(3)：544-549,6.DOI:10.3969/j.issn.1001-0505.2015.03.023
单层屈曲约束支撑框架的抗震参数
Seismic parameters of single-layer buckling-restrained braced frame
摘要
Abstract
To provide the design reference for the frame structure with buckling-restrained brace ( BRB) , the seismic parameters of the single-layer buckling-restrained braced frame ( BRBF) struc-ture are studied.By lateral displacement analysis, three key parameters characterizing the structural force and deformation, the BRB-to-frame stiffness ratio, the BRB-to-frame yield strength ratio and the beam-to-column line stiffness ratio, are derived.By taking the maximum displacement and the residual displacement under the specific ground motion as the evaluation indexes, parametric analyses are carried out.The analysis results show that when the BRB-to-frame stiffness ratio and the beam-to-column line stiffness ratio are small, both kinds of displacements decrease with the increase of the ratios.The BRB-to-frame yield strength ratio influences greatly on the structural yield displacement and mechanism.The reasonable values of the BRB-to-frame stiffness ratio, the BRB-to-frame yield strength ratio and the beam-to-column line stiffness ratio are 2, 0.7 and 0.45~5.00, respectively. Base on these reasonable values, two examples are designed and the corresponding seismic perform-ance is analyzed.The results show that the BRB-beam-column yield mechanism is formed in the structures.After the BRB yields, the ratio of the shear forces of the frame increases gradually.The layout principle of BRB has almost no obvious influence on the roof displacement response, but af-fects significantly the axial force of the adjacent columns.关键词
单层屈曲约束支撑框架/抗震参数/合理参数值/布置方式Key words
single-layer buckling-restrained braced frame/seismic parameters/reasonable parameter values/layout principle分类
建筑与水利引用本文复制引用
冯玉龙,吴京,孟少平,付康..单层屈曲约束支撑框架的抗震参数[J].东南大学学报（自然科学版）,2015,(3):544-549,6.基金项目
国家自然科学基金资助项目（51278105）、中央高校基本科研业务费专项资金资助项目、江苏省普通高校研究生科研创新计划资助项目（KYLX＿0153）． （）
