Seismic Behavior and Shear Strength of Tubed RC Short Columns
Reinforced concrete (RC) short columns are vulnerable to brittle shear failure during an earthquake. RC short columns are widely used in bridges,high rise buildings and large factories,therefore it is important to investigate the approaches to improve the ductility of RC short columns. The objective of this research evaluate the performance enhancement of RC short columns tubed by circular or square tubes. Eight short columns were tested under combined constant axial load and cyclic lateral load. The tested tubed RC short columns included three circular tubed RC (CTRC) columns and three square tubed RC (STRC) columns. Two common RC short columns including one circular RC column and one square RC column were also tested as control specimen. The test results indicated that common RC short columns suffered brittle shear failure with little ductility,while the ductility of tubed RC short columns was excellent due to the effective confinement of the outer thin tube to the core concrete. The lateral load strength of CTRC short columns increases with an increment in axial load ratio,while the axial load ratio affects little on the ductility of CTRC short columns. The nominal shear strength increases with an increment in axial load ratio,while the ductility decreases with an increment in axial load ratio for STRC short columns. A circular tube prevents the core concrete from shear failure more effectively than a square tube for the tubed RC short columns.
Tubed RC short column Shear failure Axial load ratio Ductility
Jiepeng Liu Sumei Zhang Ali Abdnilah Jasim
School of Civil Engineering,Harbin Institute of Technology,Harbin,150090 China
国际会议
哈尔滨
英文
228-240
2008-10-11（万方平台首次上网日期，不代表论文的发表时间）