Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets

Jian-Guo Dai; Keisuke Sumiyoshi; Tamon Ueda; Hiroshi Yokota; Yasuhiko Sato

Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets

Jian-Guo Dai, Keisuke Sumiyoshi, Tamon Ueda, Hiroshi Yokota, Yasuhiko Sato

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

This paper investigates experimentally how various bond configurations influence the flexural response of FRP-strengthened RC beams. A total of seven beams(200×200×2200mm) were tested. One was the reference without strengthening. Two were strengthened with CFRP sheets using hard and soft adhesive bonding, respectively, along the whole test span. The remaining four were applied a combination of hard and soft adhesives but in two different ways. One way is to use the soft adhesive at the flexure-dominating zone only and another is to use it for the shear-dominating zone only. Pair tests were conducted for these four specimens under both normal and low temperature (-10C). It is revealed that a sole use of soft adhesive improves the ultimate member strength and ductility but leads to a loss of stiffness. Using the soft adhesive at the flexure-dominating zone can not improve the member strength but improve the member ductility only. However, use of hard adhesive at the flexure-dominating zone and the soft one for the remaining parts can improve the member strength and ductility while avoiding loss of member stiffness. This test program provides an in-depth understanding of the debonding mechanisms in the FRP-strengthened RC beams. In addition, it is verified that that a low temperature of -10C does not influence the global flexural response of FRP strengthened beams using the combined bonding system.

Original language	English
Title of host publication	Composites in Civil Engineering-CICE2006
Editors	Amir Mirmiran, Antonio Nanni
Publisher	Florida International University
Pages	39-43
Number of pages	4
ISBN (Print)	0-615-13586-2
Publication status	Published - 2006
Externally published	Yes
Event	The Third International Conference on Composites in Civil Engineering - Miami, United States Duration: 14 Dec 2006 → 15 Dec 2006

Conference

Conference	The Third International Conference on Composites in Civil Engineering
Abbreviated title	CICE-2006
Country/Territory	United States
City	Miami
Period	14/12/06 → 15/12/06

Cite this

@inproceedings{e9a397c3c5274568946f62c7c62fad06,

title = "Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets",

abstract = "This paper investigates experimentally how various bond configurations influence the flexural response of FRP-strengthened RC beams. A total of seven beams(200×200×2200mm) were tested. One was the reference without strengthening. Two were strengthened with CFRP sheets using hard and soft adhesive bonding, respectively, along the whole test span. The remaining four were applied a combination of hard and soft adhesives but in two different ways. One way is to use the soft adhesive at the flexure-dominating zone only and another is to use it for the shear-dominating zone only. Pair tests were conducted for these four specimens under both normal and low temperature (-10C). It is revealed that a sole use of soft adhesive improves the ultimate member strength and ductility but leads to a loss of stiffness. Using the soft adhesive at the flexure-dominating zone can not improve the member strength but improve the member ductility only. However, use of hard adhesive at the flexure-dominating zone and the soft one for the remaining parts can improve the member strength and ductility while avoiding loss of member stiffness. This test program provides an in-depth understanding of the debonding mechanisms in the FRP-strengthened RC beams. In addition, it is verified that that a low temperature of -10C does not influence the global flexural response of FRP strengthened beams using the combined bonding system. ",

author = "Jian-Guo Dai and Keisuke Sumiyoshi and Tamon Ueda and Hiroshi Yokota and Yasuhiko Sato",

year = "2006",

language = "English",

isbn = "0-615-13586-2",

pages = "39--43",

editor = "Amir Mirmiran and Antonio Nanni",

booktitle = "Composites in Civil Engineering-CICE2006",

publisher = "Florida International University",

note = "The Third International Conference on Composites in Civil Engineering, CICE-2006 ; Conference date: 14-12-2006 Through 15-12-2006",

}

Dai, J-G, Sumiyoshi, K, Ueda, T, Yokota, H & Sato, Y 2006, Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets. in A Mirmiran & A Nanni (eds), Composites in Civil Engineering-CICE2006. Florida International University, pp. 39-43, The Third International Conference on Composites in Civil Engineering, Miami, United States, 14/12/06.

Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets. / Dai, Jian-Guo; Sumiyoshi, Keisuke; Ueda, Tamon et al.
Composites in Civil Engineering-CICE2006. ed. / Amir Mirmiran; Antonio Nanni. Florida International University, 2006. p. 39-43.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

T1 - Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets

AU - Dai, Jian-Guo

AU - Sumiyoshi, Keisuke

AU - Ueda, Tamon

AU - Yokota, Hiroshi

AU - Sato, Yasuhiko

PY - 2006

Y1 - 2006

N2 - This paper investigates experimentally how various bond configurations influence the flexural response of FRP-strengthened RC beams. A total of seven beams(200×200×2200mm) were tested. One was the reference without strengthening. Two were strengthened with CFRP sheets using hard and soft adhesive bonding, respectively, along the whole test span. The remaining four were applied a combination of hard and soft adhesives but in two different ways. One way is to use the soft adhesive at the flexure-dominating zone only and another is to use it for the shear-dominating zone only. Pair tests were conducted for these four specimens under both normal and low temperature (-10C). It is revealed that a sole use of soft adhesive improves the ultimate member strength and ductility but leads to a loss of stiffness. Using the soft adhesive at the flexure-dominating zone can not improve the member strength but improve the member ductility only. However, use of hard adhesive at the flexure-dominating zone and the soft one for the remaining parts can improve the member strength and ductility while avoiding loss of member stiffness. This test program provides an in-depth understanding of the debonding mechanisms in the FRP-strengthened RC beams. In addition, it is verified that that a low temperature of -10C does not influence the global flexural response of FRP strengthened beams using the combined bonding system.

AB - This paper investigates experimentally how various bond configurations influence the flexural response of FRP-strengthened RC beams. A total of seven beams(200×200×2200mm) were tested. One was the reference without strengthening. Two were strengthened with CFRP sheets using hard and soft adhesive bonding, respectively, along the whole test span. The remaining four were applied a combination of hard and soft adhesives but in two different ways. One way is to use the soft adhesive at the flexure-dominating zone only and another is to use it for the shear-dominating zone only. Pair tests were conducted for these four specimens under both normal and low temperature (-10C). It is revealed that a sole use of soft adhesive improves the ultimate member strength and ductility but leads to a loss of stiffness. Using the soft adhesive at the flexure-dominating zone can not improve the member strength but improve the member ductility only. However, use of hard adhesive at the flexure-dominating zone and the soft one for the remaining parts can improve the member strength and ductility while avoiding loss of member stiffness. This test program provides an in-depth understanding of the debonding mechanisms in the FRP-strengthened RC beams. In addition, it is verified that that a low temperature of -10C does not influence the global flexural response of FRP strengthened beams using the combined bonding system.

M3 - Conference article published in proceeding or book

SN - 0-615-13586-2

SP - 39

EP - 43

BT - Composites in Civil Engineering-CICE2006

A2 - Mirmiran, Amir

A2 - Nanni, Antonio

PB - Florida International University

T2 - The Third International Conference on Composites in Civil Engineering

Y2 - 14 December 2006 through 15 December 2006

ER -

Effects of Bond Configurations on Flexural Response of RC Beams Externally Strengthened with CFRP Sheets

Abstract

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