Early-age restrained shrinkage cracking of GFRP-RC bridge deck slabs: Effect of environmental conditions

被引：13

作者：

Ghatefar, Amir ^{[1
]}

El-Salakawy, Ehab ^{[1
]}

Bassuoni, M. T. ^{[1
]}

机构：

[1] Univ Manitoba, Dept Civil Engn, Winnipeg, MB R3T 5V6, Canada

来源：

CEMENT & CONCRETE COMPOSITES | 2015年 / 64卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

GFRP; Deck slabs; Early-age cracking; Wetting-drying cycles; Freezing-thawing cycles; Serviceability;

D O I：

10.1016/j.cemconcomp.2015.07.010

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Most of codes and guidelines for glass fiber reinforced polymers (GFRP) - Reinforced Concrete (RC) are based on modifying corresponding formulas, originally developed for steel bars, taking into account the differences in properties and behavior between FRP and steel. The main objective of this research is to investigate the effect of cyclic environments on early-age cracking of GFRP-RC bridge deck slabs experimentally. Two full-scale (measuring 2500-mm long x 765-mm wide x 180-mm thick) cast-in-place slabs reinforced with similar amounts of reinforcement ratio of 0.7% with GFRP and steel bars, respectively, were tested in adiabatic laboratory conditions as control specimens. In comparison, two other GFRP-RC deck slabs were tested under freezing thawing and wetting drying conditions. The test results are presented in terms of materials degradation, cracking pattern, crack width, and spacing, and strains in reinforcement and concrete. Test results indicate that the minimum reinforcement ratio (0.7%) recommended by the Canadian Highway Bridge Design Code 2006 (CHBDC 2006) for bridge deck slabs reinforced with GFRP bars satisfied the serviceability requirements after being subjected to the simulated cyclic exposures. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：62 / 73

页数：12

共 26 条

[11] Effects of temperature on the behaviour of fiber reinforced polymer reinforced concrete members: experimental studies [J].

Elbadry, MM ;

Abdalla, H ;

Ghali, A .

CANADIAN JOURNAL OF CIVIL ENGINEERING, 2000, 27 (05) :993-1004

[12]

Frosch R. J., 2003, FHWAINJTRP200225 PUR

[13]

Ghatefar A., 2015, J COMPOS CONSTR, V19

[14] Effect of Reinforcement Ratio on Transverse Early-Age Cracking of GFRP-RC Bridge Deck Slabs [J].

Ghatefar, Amir ;

El-Salakawy, Ehab ;

Bassuoni, M. T. .

JOURNAL OF COMPOSITES FOR CONSTRUCTION, 2014, 18 (06)

[15]

GILBERT RI, 1992, ACI STRUCT J, V89, P141

[16] Transverse Cracking of Concrete Bridge Decks: State-of-the-Art [J].

Hadidi, Rambod ;

Saadeghvaziri, M. Ala .

JOURNAL OF BRIDGE ENGINEERING, 2005, 10 (05) :503-510

[17]

Holland TerenceC., 2005, SILICA FUME USERS MA

[18]

ISIS Canada, 2006, DUR MON ISIS CAN RES

[19]

Koenigsfeld D., 2003, SECONDARY REINFORCEM

[20] Creep and durability of sand-coated glass FRP bars in concrete elements under freeze/thaw cycling and sustained loads [J].

Laoubi, Kader ;

EI-Salakawy, Ehab ;

Benmokrane, Brahim .

CEMENT & CONCRETE COMPOSITES, 2006, 28 (10) :869-878

← 1 2 3 →