Effect of concrete cover thickness and main reinforcement ratio on flexural behavior of RC beams strengthened by NSM-GFRP bars

被引:10
|
作者
El-Emam, Hesham [1 ]
El-Sisi, Alaa [2 ]
Reda, Ramy [3 ]
Seleem, Mohamed [1 ]
Bneni, Mohamed [1 ]
机构
[1] Zagazig Univ, Zagazig, Egypt
[2] Univ Missouri, Columbia, MO 65211 USA
[3] Higher Technol Inst, 10th of Ramadan, Egypt
来源
FRATTURA ED INTEGRITA STRUTTURALE | 2020年 / 14卷 / 52期
关键词
Near Surface Mounted; Flexural Strengthening; Concrete Cover Separation; FE models; SURFACE MOUNTED STEEL; STRIPS; BOND;
D O I
10.3221/IGF-ESIS.52.16
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Experimental and numerical programs were conducted to investigate the effect of concrete cover and area of main steel reinforcement on the flexural behavior of strengthened RC beams by near-surface mounted glass fiber reinforced polymeric (NSM GFRP) bars of different lengths. Nine beams divided into three main groups were tested under four-point bending. The three beams of the first group were strengthened by different lengths of GFRP bars and having a concrete cover of 50 mm, while the three beams in the second group were strengthened in a similar manner as those of the first group but the concrete cover was 30 mm. The main steel reinforcement in the first and second groups was 2empty set10. The three beams of the third group were similar to those of the first and second group but the main steel reinforcement was 2empty set16. The 3-D FE commercial ANSYS program was used for the numerical work. The experimental results showed that decreasing the concrete cover increased the flexural capacity of the strengthened RC beams but this improvement disappeared by decreasing the NSM GFRP bar length. The numerical results showed an agreement with the experimental results.
引用
收藏
页码:197 / 210
页数:14
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