高强连续螺旋箍筋约束混凝土柱的地震损伤试验分析  

Experimental Study on Seismic Damage Process of High Strength Continuous Spiral Stirrups Concrete Columns

作　　者：宋扬[1] 郑先超[1] 李青宁[2] 李桅[3] 

机构地区：[1]安阳工学院土木与建筑工程学院,河南安阳455000 [2]西安建筑科技大学土木工程学院,西安710055 [3]温州大学建筑学院,浙江温州325035

出　　处：《河南大学学报（自然科学版）》2015年第5期612-616,共5页Journal of Henan University:Natural Science

基　　金：国家自然科学基金(51308419);安阳工学院基金(YJJ2014016)

摘　　要：通过分析6根高强连续螺旋箍筋约束混凝土柱在低周反复荷载作用下的滞回性能,获得了各构件破坏时的累积滞回耗能.运用修正Park-Ang模型计算高强连续螺旋箍筋约束混凝土构件在不同位移角下的损伤指数,对柱全过程损伤趋势进行研究,发现:修正Park-Ang模型的计算结果能合理地反映不同参数的高强连续螺旋箍筋约束混凝土构件的损伤发展过程,并与试验结果一致;在高轴压下,无论高强连续螺旋箍筋约束混凝土装配式柱还是现浇式柱在模型中的耗能因子都大于0.037,在1/50位移角下的损伤指数计算值都小于0.7.由于具有很好的延性,高强连续螺旋箍筋约束混凝土柱的轴压比限制可以进一步放松.The cumulative dissipated hysteretic energy of six high-strength continuous spiral stirrups constraints concrete columns through pseudo static test was utilized. The damage index of six high-strength continuous spiral stirrups constraints concrete columns under different story drifts was calculated using the modified Park-Ang model. The results show that the comparison between the calculated damage indices using the modified Park-Ang model and test results shows a good agreement. The energy weighted coefficient of columns damage model should be more than 0. 037 whether fabricated columns or cast-in-place columns. The calculated damage index value under 1/50 story drifts is less than 0.7. Therefore, both fabricated columns and cast-in-place columns have the very good ductility. The axial compression ration limits of high-strength continuous spiral stirrups constraints concrete columns at different seismic levels were proposed, which can be further relax restrictions.

关 键 词：高强连续螺旋箍筋 累积滞回耗能 轴压比 损伤指数 装配整体式 

分 类 号：TU375.303[建筑科学—结构工程]