EXPERIMENTAL STUDY OF ACTIVELY AND PASSIVELY CONFINED CONCRETE SUBJECTED TO CYCLIC AXIAL COMPRESSION
Monotonic stress-strain relationship of actively-confined concrete has been used as the base model to establish analysis-oriented stress-strain model of fiber reinforced polymer(FRP)confined concrete.This approach is based on the assumption that the axial stress and strain of FRP-confined concrete are the same as those of actively confined concrete under the same confinement pressure and lateral strain.In this study,an experiment was conducted to verify this assumption for concrete subjected to cyclic loading.A total of 31 actively confined and FRP-confined concrete cylinders were tested.The results indicate that this assumption is not applicable to concrete under cyclic loading; a gap was found between the envelope curves of the two types of confined concrete.In addition,the test results also reveal that confinement pressure significantly affects both reloading modulus and plastic strain which are the main factors controlling the cyclic behavior of confined concrete.
Concrete Active confinement Passive confinement FRP Cyclic loading
Pengda Li Yufei Wu Cheng Jiang Yingwu Zhou Feng Xing
Department of Architecture and Civil Engineering,City University of Hong Kong Shenzhen Institute,She School of Engineering,RMIT Universiy,Melbourne,Australia Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering,Shenzhen University,S
国际会议
新加坡
英文
1-4
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）