RC構架以CFRP補強柱之耐震能力研究

• Main Authors: Tsang-Sheng Fang, 方倉盛
• Other Authors: Ching-Churn Chern
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/58038938803203928377

碩士 === 國立臺灣大學 === 土木工程學研究所 === 90 === The object of this paper is to investigate the aseismic capacity of the RC frames with columns strengthened by CFRP. The steps of aseismic analysis start in concrete constitutive law. In order to select the suitable constitutive model of confined concrete, thirty-six concrete cylinders with a dimension of 30×60 cm were designed and tested to verify the effectiveness of some familiar models. The design parameters of the specimens are the different confinement types of the steel reinforcement and the number of layers of CFRP. According to the experimental results, we can conclude that the model proposed by Li and Lin (named modified L-L model) can provide more effective prediction than the model proposed by Mander et al. and Kawashima et al. Firstly, the moment-curvature curve of RC section can be obtained by using the modified L-L model and sectional analysis program. Secondly, the structure will be analyzed linearly by adopting ETABS software, and the member forces are carried out. The nonlinear response can be figured out by using the principle of energy conservation of Pseudo-elastic method from linear analysis. Finally, the yielding lateral force, yielding drift, ultimate lateral force, and ultimate drift, and collapsed ground acceleration can be determined. By observing the results of research, the RC frame strengthened with confined column by CFRP only, will be able to increase its ductility, ultimate lateral capacity, and collapse ground accelerations while the frame is failed in case of shear failure on base story column; on other hand, the increasing of frame ductility or lateral capacity will not be so obviously while the fame is failed in case of mechanism collapse.