THE EFFECTIVENESS OF FRP TO CONFINE CIRCULAR CONCRETE COLUMNS UNDER SIMULATED SEISMIC LOADING
Fiber reinforced polymer (FRP) have great efficiency to retrofit circular reinforced concrete (RC) columns under simulated seismic loading. In this paper,the results of a research program that evaluated the confinement effectiveness of the amount of FRP used to retrofit circular concrete columns are presented. The test results of fourteen circular concrete columns are presented,which were tested under combined lateral cyclic displacement excursions and constant axial load. The impact of the FRP amount to the deformation capacity of the retrofitted columns was studied. The test results demonstrate that the ultimate drift ratio does not always increase with an increase of the amount of FPR. The peak of the ultimate drift ratio is attained at a critical value of the amount of FPR,after which the ultimate drift ratio can be decreased with an increase in the amount of FPR. The test results show that the plastic hinge length of retrofitted columns can also be influenced by the amount of FRP. Analytical studies were performed to investigate the deformation capacity of retrofitted columns. The sectional curvature is calculated with numerical analysis method. It is found the FRP amount has very limited influence to sectional yield curvature,however,the ultimate curvature can be significantly influenced. The ultimate curvature can be significantly increased with an increase of the amount of FRP.
FRP confinement Seismic retrofitting Fracture strain
Dong-Sheng Gu Gang Wu Yang Wei
Key laboratory of bridge-structure engineering,Chongqing Jiaotong University,Chongqing 400074,P.R. C Key laboratory of concrete and pre-stressed concrete structures of the Ministry of Education,Southea Key aboratory of bridge-structure engineering,Chongqing Jiaotong University,Chongqing 400074,P.R. Ch
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
688-694
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）