Effect of fiber parameters and concrete strength on shear behavior of strengthened RC beams

被引：27

作者：

Al-Tersawy, Sherif H. ^{[1
]}

机构：

[1] Higher Technol Inst, Civil Eng Dept, 10Th Of Ramadan City, Egypt

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2013年 / 44卷

关键词：

Strengthening; Fiber reinforced polymers (FRPs); RC beams; Shear strength; Fiber parameters; Concrete strength; REINFORCED POLYMER; DESIGN; CAPACITY;

D O I：

10.1016/j.conbuildmat.2013.03.007

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents the performance of reinforced concrete (RC) beams strengthened in shear. Both experimental investigation and analytical models were presented. Experimental investigation was carried out on nine RC beams of three different sets, as-built beams (unstrengthened), beams strengthened with vertical carbon fiber-reinforced polymer (CFRP) wraps, and beams strengthened with inclined CFRP wraps. The main parameters investigated were concrete strength, CFRP thickness and wraps orientations (90,45). The results of the experimental work indicated that externally bonded CFRP wraps enhanced the shear strength of beams significantly and that inclined CFRP configuration is more effective than vertical ones. Also, it was shown that concrete strength affects the contribution of CFRP regarding shear resistance. Experimental results were compared to analytical models, ACI 440.2R-08 and ECP 208-05. The results showed that the design approaches of both codes are almost similar. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：15 / 24

页数：10

共 18 条

[1]

ACI committees 440, 2008, 4402R08 ACI COMM 440

[2]

American Concrete Institute (AO), 2005, 31805 ACI

[3] Peeling and diagonal tension failures in steel plated R/C beams [J].

Ashrafuddin, M ;

Baluch, MH ;

Sharif, A ;

Al-Sulaimani, GJ ;

Azad, AK ;

Khan, AR .

CONSTRUCTION AND BUILDING MATERIALS, 1999, 13 (08) :459-467

[4] Behavior of full-scale RC T-beams strengthened in shear with externally bonded FRP sheets [J].

Belarbi, Abdeldjelil ;

Bae, Sang-Wook ;

Brancaccio, Antonio .

CONSTRUCTION AND BUILDING MATERIALS, 2012, 32 :27-40

[5]

Bousselham A, 2004, ACI STRUCT J, V101, P219

[6]

CSA, 2002, CSAS80602

[7]

ECOP, 2082005 ECOP ECP

[8]

Hutchinson R.L., 1999, ACI Special Publications, V188, P945, DOI 10.14359/5692

[9]

JSCE, 2001, Recommendations for upgrading of concrete structures with use of continuous fiber sheets

[10] Improving shear capacity of existing RC T-section beams using CFRP composites [J].

Khalifa, A ;

Nanni, A .

CEMENT & CONCRETE COMPOSITES, 2000, 22 (03) :165-174

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