BEHAVIOR OF REINFORCED CONCRETE COLUMNS UNDER DIFFERENT LOADING HISTORIES
Three reinforced concrete (RC) circular columns were tested under different reversed cyclic loading programs to investigate the seismic behavior of the columns in near-fault earthquakes.The ultimate capacity,ductility ratio,hysteretic curve and hoop strain in plastic hinge region were obtained through experimental study of the columns.The influence of displacement history sequence upon the hysteretic characteristics,stiffness and strength degradation,ability of energy dissipation and hoop strain distribution were analyzed.It is shown that the ductility of RC columns designed by Chinese design code is inadequate in near-fault earthquake region,and the sequence of maximum displacement in the loading history could lead to an earlier buckling of the longitudinal bars.The ultimate capacity and displacement of columns failed in flexural mode are controlled by fatigue fracture or compressive buckling of the longitudinal bars,concrete in plastic hinge region can be effectively confined by the steel hoops.
Reinforced concrete column seismic test displacement history sequence near-fault ground motion
Weijian Yi Yi Liu Yun Zhou
College of Civil Engineering, Hunan University, Changsha, 410082, P.R.China Hunan Provincial Planning and Design Institute, Changsha, 410011, P.R.China
国际会议
The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)
武汉
英文
1024-1030
2012-11-17（万方平台首次上网日期，不代表论文的发表时间）