高强连续螺旋箍筋约束混凝土装配式柱恢复力模型的试验  

Experimental study on restoring force model of assembled high-strength continuous spiral stirrup concrete columns

作　　者：郑先超[1] 赵青[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]温州大学建筑工程学院,浙江温州325035

出　　处：《中国科技论文》2015年第13期1599-1604,共6页China Sciencepaper

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

摘　　要：根据5个外包钢板箍+栓筋连接的装配整体式柱和3个整体现浇柱高强连续螺旋箍筋约束混凝土柱拟静力试验结果,通过理论分析和试验数据拟合,给出钢板箍+栓筋连接的装配式柱恢复力模型特征参数的计算方法,提出"定点指向"三折线恢复力模型。研究结果表明:高强箍筋对混凝土的约束作用、钢板箍的厚度和高度,以及轴压比大小对构件的极限荷载与屈服荷载比值影响较小;极限荷载随着轴压比的增大而增大,延性随着轴压比的增大而降低,随着钢板箍的高度的增大而提高;通过试验骨架曲线和计算骨架曲线的对比,两者比较吻合,能够比较全面地反映构件的实际受力性能,所提恢复力模型较为合理。Based on the quasi-static test results of 8 high-strength continuous spiral stirrup concrete columns,the method of calcu-lating the characteristic parameters was presented and the “designated point”broken tri-linear restoring force model for high-strength continuous spiral stirrup concrete columns was also proposed by the theoretical analysis and experimental data fitting. The results show that the constraints of high-strength continuous spiral stirrup on concrete,height and thickness of steel hoop and axial compression ratio,have little influence on the ratio of ultimate load to yield load.The ultimate load increases with the increase of axial compression ratio.However,the ductility decreases with the increase of the axial compression ratio,yet it in-creases as the steel hoop height increasing.Through the comparison between the test results and the calculated results,it is seen that the restoring force model can reflect the mechanical performance of high-strength continuous spiral stirrup columns and the results agree well with the test results,indicating that the restoring force mode can be used for high-strength continuous spiral stirrup components.

关 键 词：高强螺旋箍筋 外包钢板箍 轴压比 恢复力模型 

分 类 号：TU398.9[建筑科学—结构工程]