Study on the Seismic Performance Curves of Reinforced Concrete Short Columns Failed in Shear

• Main Authors: Yi-Tang Huang, 黃益堂
• Other Authors: Shyh-Jiann Hwang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/79749946347971810088

碩士 === 國立臺灣大學 === 土木工程學研究所 === 96 === During the 921 Chi-Chi Earthquake, a lot of reinforced concrete buildings failed in shear. Shear failure is brittle and therefore should be avoided. In order to provide ventilation, mounting of air conditioner, door frame, etc., most often extreme-short columns are encountered. These columns will be the weakest elements due to its small lateral displacement. Thus, this research is aimed to study the seismic resistant behavior of extreme-short column under constant axial force through observation in laboratory experiments and analysis. There are several important variables which can affect the strength and behaviour of extreme-short columns, such as aspect ratio, axial load, and hoop detailing. Totally, eight specimens were tested under double curvature and constant axial load by reverse loading test to observe the behaviour of the shear and axial failures. Test results show that under different magnitude of axial load, the collapse behaviour is different in sense that higher axial load can accelerate the failure process. Columns with transverse reinforcement using ductile detailing can resist higher lateral force and lateral displacement capability.