Development of strength prediction method of RC beams strengthened with prestressed CFRP plates by cross-section analysis

被引：3
|
作者：
Woo, Sang-Kyun [1 ]
Kim, Jang-Ho Jay [2 ]
Byun, Keun-Joo [2 ]
机构：
[1] Korea Elect Power Res Inst, Power Syst Lab, Taejon 305380, South Korea
[2] Yonsei Univ, Sch Civil & Environm Engn, Seoul 120794, South Korea
来源：
KSCE JOURNAL OF CIVIL ENGINEERING | 2012年 / 16卷 / 06期
关键词：
prestressed CFRP plate; RC flexure member; flexure strength; strengthening effectiveness; REINFORCED-CONCRETE BEAMS; FLEXURAL BEHAVIOR; COMPOSITE PLATES;
D O I：
10.1007/s12205-012-1471-2
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The purpose of this study is to evaluate the flexural behavior of Reinforced Concrete (RC) beams strengthened with prestressed Carbon Fiber Reinforced Polymers (CFRP) plates and to suggest the analytic equations of flexural capacity calculation for strengthening design. The evaluation of flexural behavior is carried out by parameter study experiments and the derived design equations are verified by the experimental results. The experimental parameters are concrete compressive strength, tensile reinforcement ratio, and prestressing level. Failure and fracture modes are observed and the efficiency of different CFRP prestressing level is studied. The results show that the non-prestressed specimens fail by spalling of the CFRP plate from the RC beam, while prestressed specimens fail due to CFRP plate failure. The presented equations of flexural capacity for RC beams strengthened with prestressed CFRP plates are shown to be sufficiently accurate in predicting flexural strengthening effectiveness of RC beams.
引用
收藏
页码：1011 / 1022
页数：12
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