Strengthening of RC T-section beams with low strength concrete using CFRP composites subjected to cyclic load

被引:32
作者
Anil, Oezguer [1 ]
机构
[1] Gazi Univ, Dept Civil Engn, TR-06570 Ankara, Turkey
关键词
reinforced concrete beam; strengthening; shear; epoxy; CFRP; cyclic load; low strength concrete;
D O I
10.1016/j.conbuildmat.2007.10.003
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Various methods are developed for strengthening reinforced concrete beams against shear. Nowadays, external bonding of different composite members to RC beams was very popular and successful technique internationally. This study presents test results on strengthening of shear deficient RC beams by external bonding of carbon fiber reinforced polymer (CFRP) straps. Six RC beams with a T-section were tested under cyclic loading in the experimental program. Width of the CFRP straps, arrangements of straps along the shear span, and anchorage techniques that were applied at the ends of straps were the main parameters that were investigated during experimental study. Shear deficient beams with low strength concrete were strengthened by using CFRP straps for obtaining ductile flexural behavior. The test results confirmed that all CFRP arrangements improved the strength, stiffness and energy dissipation capacity of the specimens significantly. The failure mode and ductility of specimens were proved to differ according to the CFRP strap width and arrangement along the beam. Experimental results were compared with the analytical approaches that were suggested by ACI-440 Committee Report. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2355 / 2368
页数:14
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