钢筋混凝土带暗柱等肢T形柱轴压比限值调整系数的研究  

Study on adjustment coefficient of limit values of axial compression ratios of RC equilimb T-shaped columns with concealed column

作　　者：岳利红[1] 张新培[1] 蒋智勇[1] 

机构地区：[1]四川大学建筑与环境学院,四川成都610065

出　　处：《世界地震工程》2010年第3期191-198,共8页World Earthquake Engineering

摘　　要：若干研究已表明设置暗柱能有效提高T形柱的延性,但迄今为止带暗柱T形柱轴压比限值的研究尚为空白,这影响了带暗柱T形柱的工程应用。文中采用非线性全过程数值计算方法,计算了不同肢长、不同抗震等级下带暗柱与不带暗柱钢筋混凝土等肢T形柱在不同纵向受力钢筋配筋率和不同体积配箍率时的截面曲率延性比;根据《混凝土异形柱结构技术规程》(JGJ149-2006)给出的各抗震等级下对异形柱截面曲率延性比的要求,确定了带暗柱与不带暗柱的等肢T形柱的轴压比限值,进而求出两者同一肢长下轴压比限值的比值;最后通过回归分析得到了带暗柱等肢T形柱轴压比限值的调整系数公式。利用此公式并根据《规程》JGJ149-2006中规定的不带暗柱T形柱的轴压比限值即可求出带暗柱等肢T形柱的轴压比限值。Lots of studies show that the concealed column can improve the ductility of T-shaped column,but study on the limit values of axial compression ratios of the T-shaped column with concealed column hasn＇t mentioned.Based on the nonlinear analysis method of complete response process,cross-section curvature ductility ratios of the equilimb T-shaped columns with and without concealed column under different conditions are calculated,according to curvature ductility ratio of each anti-seismic grade by ＂Technical Specification for Concrete Structures with Specially Shaped Column＂（JGJ 149-2006）,the limit-value ratios of the axial pressure ratios of the both T-shaped columns are calculated,then the equation of adjustment coefficient through regression analysis is gained.According to the limit values of the axial compression ratios of equilmb T-shaped column without concealed column from Specification JGJ-149-2006,the limit values of axial compression ratios of equiaxial T-shaped column with concealed column can be obtained by using the equation.

关 键 词：等肢T形柱 暗柱 轴压比限值 调整系数 

分 类 号：TU375.3[建筑科学—结构工程] TU202