Shear strengthening of RC beams using near-surface mounted carbon fibre-reinforced polymers

被引：22
作者：
Al Rjoub, Yousef S. [1 ]
Ashteyat, Ahmed M. [2 ]
Obaidat, Yasmeen T. [1 ]
Bani-Youniss, Saleh [1 ]
机构：
[1] Jordan Univ Sci & Technol, Civil Engn Dept, POB 3030, Irbid 22110, Jordan
[2] Univ Jordan, Civil Engn Dept, Amman 11942, Jordan
来源：
AUSTRALIAN JOURNAL OF STRUCTURAL ENGINEERING | 2019年 / 20卷 / 01期
关键词：
Near-surface mounted; carbon fibre-reinforced polymers; reinforced concrete beams; shear strengthening; CONCRETE BEAMS; NSM SYSTEMS; BOND; PERFORMANCE; BEHAVIOR; BARS;
D O I：
10.1080/13287982.2019.1565617
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper summarises the results of experimental work on reinforced concrete beams strengthened in shear using near-surface mounted carbon fibre-reinforced polymers (NSM-CFRP). Fourteen beams (150 x 200 x 1200 mm) in dimension, with insufficient shear reinforcement, were tested under four-point bending. The effects of side concrete cover depth, NSM-CFRP strip inclination angle and NSM-CFRP strip length on the behaviour of RC beams were studied. Six of the beams were cast with three different side concrete cover depths, 20, 30 and 40 mm, and strengthened in shear by NSM-CFRP, with inclination angles of 0 degrees and 45 degrees. Other beams with a side concrete cover depth of 30 mm were strengthened in shear by NSM-CFRP with different strip lengths, measured in terms of beam depth (full, 2/3, and 1/3) and inclinations of 0 degrees and 45 degrees. The results show that the concrete side cover depth enhances the behaviour of NSM-CFRP-strengthened beams. Beams with inclined NSM-CFRP strips experienced higher ultimate strengths than those with vertical NSM-CFRP. It was found that ultimate strength increases with longer strip length.
引用
收藏
页码：54 / 62
页数：9
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