基于构件性能的钢管混凝土减震框架性能指标研究

Research on Component-based Performance Index of CFST Frame with BRBs

基于国内外68个圆形和82个方形钢管混凝土柱的抗震性能试验数据,根据损伤程度确定了钢管混凝土柱不同性能水准下的水平位移角限值,并结合钢梁和防屈曲支撑的性能指标,对具有不同设计参数的72个设置了防屈曲支撑的钢管混凝土减震框架进行静力弹塑性数值分析,确立了不同性能水准下钢管混凝土减震框架的性能指标限值,为建立基于性能的钢管混凝土减震框架抗震设计方法提供依据。

Based on the data of seismic test including 68 concrete filled circular steel tube（CFST） columns and 82 concrete filled square steel tube（CFSST） columns,the limits of horizontal drift ratio is determined under different five performance levels.Combined with the performance indexes of steel beam and buckling-restrained brace（BRB）.Push-over analysis of 72 CFST frames with BRBs,which are designed using different structural parameters,are carried out.At last the structure performance index limit of each performance level is obtained,which provides the basis for the performance-based seismic design method of CFST frame with BRBs.