Flexural strengthening of RC beams using externally bonded FRP sheets through flexible adhesive bonding

被引：0

作者：

Dai, JG ^{[1
]}

Ueda, T ^{[1
]}

Sato, Y ^{[1
]}

Ito, T ^{[1
]}

机构：

[1] Hokkaido Univ, Div Built Environm, Sch Fac Engn, Sapporo, Hokkaido 060, Japan

来源：

BOND BEHAVIOUR OF FRP IN STRUCTURES: PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM BBFS 2005 | 2005年

关键词：

FRP; RC beams; flexural strengthening; interface; flexible bonding;

D O I：

暂无

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper reports summarily a flexible FRP/concrete bonding system for flexural strengthening of RC members. The bonding adhesive used in this system has very low elastic modulus but large elongation up to tensile fracture. Therefore, bonding line between FRP and concrete can bear large shear deforination to delay or prevent the occurrence of local interface debonding. Results from pullout tests of FRP sheet/concrete interfaces, laboratory tests on static and fatigue performance of RC members strengthened with FRP sheets, and a full-scale test on a T-beam of 15m span are reported in this paper. Failure mechanisms of strengthened members in cases of normal bonding and flexible bonding systems are clarified comparatively. Compared to the normal adhesive bonding system, the flexible one has proven its promising validity in strengthening RC beams in terms of their ultimate strength and deformability. However, this technique is favored for the ultimate limit state strengthening purpose only since it contributes less stiffness enhancement under the serviceability limit state.

引用

页码：213 / 221

页数：9

共 17 条

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[5] Local bond stress slip relations for FRP sheets-concrete interfaces
Dai, JG
Ueda, T
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[6] DAI JG, 2005, P CONM 05 VANC CAN
[7] DAI JG, 2001, P 7 JAP INT SAMPE S, P379
[8] LAMANNA AJ, 2002, THESIS U WISCONSINMA
[9] MAEDA T, 2003, P JAPAN CONCRETE I, V25, P1885
[10] MAEDA T, 2001, P JAPAN CONCRETE I, V23, P817

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