Structural Design Issues On GFRP-Reinforced Concrete Bridge Barriers

Glass Fibre Reinforced ◽

Experimental Findings ◽

Deck Slab

In the era of bridge rehabilitation, glass fibre reinforced polymer (GFRP) bars are considered an alternative solution to steel reinforcement to eliminate steel corrosion. In this thesis, a new bridge barrier reinforcement layout was proposed incorporating GFRP bars with anchorage heads. However, it was observed that no design provisions or research data in the literature were found to design the anchorage at barrier-deck slab junction. As such, pullout tests were conducted on GFRP bars embedded in concrete slabs, to determine their pullout strength. Also, testing to-collapse of full-scale bridge barrier under static loading was conducted to determine its load carrying capacity. In addition, finite element analysis of the barrier wall and deck slab portion was performed in order to examine the level of accuracy of the specified factored applied moments due to vehicle impact at the barrier-deck junction. The experimental findings qualified the proposed GFRP-reinforced barrier detailing when subjected to simulated vehicle impact loading.

Ultimate capacity of barrier–deck anchorage in MTQ TL-5 barrier reinforced with headed-end, high-modulus, sand-coated GFRP bars

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2017-0002 ◽

2018 ◽

Vol 45 (4) ◽

pp. 263-278 ◽

Cited By ~ 2

Author(s):

Michael Rostami ◽

Khaled Sennah ◽

Hamdy M. Afefy

Keyword(s):

Highway Bridges ◽

Experimental Program ◽

Embedment Depth ◽

Reinforced Polymer ◽

Vehicle Impact ◽

Glass Fibre Reinforced ◽

Experimental Findings ◽

Deck Slab

This paper presents an experimental program to justify the barrier design at the barrier–deck junction when compared to the factored applied transverse vehicular loading specified in the Canadian Highway Bridge Design Code (CHBDC). Compared to the dimensioning and the glass fibre reinforced polymer (GFRP) bar detailing of a recently crash-tested GFRP-reinforced barrier, the adopted barrier configurations in this paper were similar to those specified by Ministry of Transportation of Québec (MTQ) for TL-5 barrier except that the base of the barrier was 40 mm narrower and the deck slab is of 200 mm thickness, leading to reduction in the GFRP embedment depth into the deck slab. Four full-scale TL-5 barrier specimens were tested to collapse. Correlation between the experimental findings and the factored applied moments from CHBDC equivalent vehicle impact forces resulting from the finite-element modelling of the barrier–deck system was conducted followed by recommendations for use of the proposed design in highway bridges in Québec.

Bond characteristics of glass fibre reinforced polymer bars embedded in high performance and ultra-high performance concrete

10.32920/ryerson.14656974 ◽

2021 ◽

Author(s):

Dave Ametrano

Keyword(s):

High Performance ◽

High Performance Concrete ◽

Ultra High Performance Concrete ◽

Bond Behaviour ◽

Gfrp Bars ◽

Reinforced Polymer ◽

Glass Fibre Reinforced ◽

Bond Characteristics

The use of fibre reinforced polymer (FRP) bars is increasing in construction as an alternative to conventional steel rebars. This thesis investigates the bond behaviour of glass fibre reinforced polymer (GFRP) bars embedded in high performance concrete (HPC) and ultra-high performance concrete (UHPC). In this study, the bond characteristics of sand coated GFRP bars embedded in 70-175 MPa concrete were explored. Beam and pullout tests were performed to determine the effects of the concrete strength, bar diameter, embedment length, and concrete cover on the bond behaviour of GFRP bars. Based on the analysis, the development lengths for the GFRP bars were determined and then compared to requirements provided by design codes. It was concluded that the design code lengths could be reduced by 20% while still maintaining a factor of safety of two over the development lengths determined through this study. This reduction can be applied when the GFRP bar is surrounded by sufficient transverse reinforcement, such that adding additional reinforcement would not affect the bond strength. Reducing the amount of GFRP reinforcing material needed, results in a lower overall cost of construction.

Long-term durability of basalt- and glass-fibre reinforced polymer (BFRP/GFRP) bars in seawater and sea sand concrete environment

Construction and Building Materials ◽

10.1016/j.conbuildmat.2017.02.038 ◽

2017 ◽

Vol 139 ◽

pp. 467-489 ◽

Cited By ~ 106

Author(s):

Zike Wang ◽

Xiao-Ling Zhao ◽

Guijun Xian ◽

Gang Wu ◽

R.K. Singh Raman ◽

...

Keyword(s):

Glass Fibre ◽

Gfrp Bars ◽

Reinforced Polymer ◽

Sea Sand ◽

Evaluation of the flexural strength and serviceability of geopolymer concrete beams reinforced with glass-fibre-reinforced polymer (GFRP) bars

Engineering Structures ◽

10.1016/j.engstruct.2015.08.003 ◽

2015 ◽

Vol 101 ◽

pp. 529-541 ◽

Cited By ~ 60

Author(s):

G.B. Maranan ◽

A.C. Manalo ◽

B. Benmokrane ◽

W. Karunasena ◽

P. Mendis

Keyword(s):

Flexural Strength ◽

Glass Fibre ◽

Concrete Beams ◽

Geopolymer Concrete ◽

Gfrp Bars ◽

Reinforced Polymer ◽

Concrete bridge barriers reinforced with glass fibre-reinforced polymer: static tests and pendulum impacts

Canadian Journal of Civil Engineering ◽

10.1139/cjce-2013-0019 ◽

2013 ◽

Vol 40 (11) ◽

pp. 1050-1059 ◽

Cited By ~ 9

Author(s):

Ehab A. Ahmed ◽

Christian Dulude ◽

Brahim Benmokrane

Keyword(s):

Phase I ◽

Concrete Bridge ◽

Static Tests ◽

Gfrp Bars ◽

Reinforced Polymer ◽

Steel Bars ◽

Glass Fibre Reinforced ◽

Pendulum Impact

The behaviour of concrete bridge barriers reinforced with glass fibre-reinforced polymer (GFRP) bars has been investigated at the University of Sherbrooke in collaboration with the Ministry of Transportation of Quebec (MTQ) through a two-phase research project. This paper presents the test results of MTQ Type 311 barrier prototypes under static (Phase I) and pendulum impact (Phase II) loading conditions. The test program included two full-scale 2.6 m long barrier prototypes for laboratory testing under static loads (Phase I) and four full-scale 11 m long barrier prototypes for field impact tests (Phase II). The laboratory static tests included one prototype totally reinforced with GFRP bars and one totally reinforced with steel bars for comparison, whereas the pendulum impact tests included two replicas totally reinforced with GFRP bars and another two totally reinforced with conventional steel bars. The barrier walls of the six prototypes were provided with the same reinforcement amount of GFRP and steel bars (No. 20 GFRP @ 200 mm and 20M steel bars @ 200 mm). The performance of the GFRP-reinforced concrete (GFRP-RC) barriers was evaluated and compared with that of their steel-RC counterparts. The results of this investigation revealed that the behaviour of the GFRP-RC concrete bridge barriers of MTQ Type 311 is similar to their steel-RC counterparts.

Effect of sustained load and seawater and sea sand concrete environment on durability of basalt- and glass-fibre reinforced polymer (B/GFRP) bars

Corrosion Science ◽

10.1016/j.corsci.2018.04.002 ◽

2018 ◽

Vol 138 ◽

pp. 200-218 ◽

Cited By ~ 62

Author(s):

Zike Wang ◽

Xiao-Ling Zhao ◽

Guijun Xian ◽

Gang Wu ◽

R.K. Singh Raman ◽

...

Keyword(s):

Glass Fibre ◽

Sustained Load ◽

Gfrp Bars ◽

Reinforced Polymer ◽

Sea Sand ◽

Pendulum impacts into concrete bridge barriers reinforced with glass fibre reinforced polymer composite bars

Canadian Journal of Civil Engineering ◽

10.1139/l04-006 ◽

2004 ◽

Vol 31 (4) ◽

pp. 539-552 ◽

Cited By ~ 13

Author(s):

Ehab El-Salakawy ◽

Radhouane Masmoudi ◽

Brahim Benmokrane ◽

Frédéric Brière ◽

Gérard Desgagné

Keyword(s):

Glass Fibre ◽

Impact Test ◽

Full Scale ◽

Concrete Bridge ◽

Conventional Steel ◽

Gfrp Bars ◽

Reinforced Polymer ◽

This paper presents the results of a pendulum impact test that was carried out on full-scale types PL-2 and PL-3 concrete bridge barriers reinforced with glass fibre reinforced polymer (GFRP) bars. A new corrosion-free connection between the barrier wall and the slab using GFRP bent bars was investigated. For comparison purposes, the impact test was also performed on identical concrete barriers reinforced with conventional steel. A total of eight full-scale 10-m-long barrier prototypes were constructed and tested. The tests included four PL-2 and four PL-3 prototypes. For each type of barrier, two prototypes were reinforced with GFRP sand-coated bars and the other two were reinforced with steel bars. Pendulum crash tests using a 3.0-t pear-shaped iron ball were performed under the same conditions for each type of barrier. The behaviour of the barriers was evaluated in terms of cracking pattern, crack width, and strains in reinforcing bars. The results of this investigation led to the conclusion that the behaviour of PL-2 and PL-3 concrete bridge barriers reinforced with GFRP bars is very similar to that of their counterparts reinforced with conventional steel in terms of cracking, energy absorption, and strength.Key words: concrete bridges, bridge barriers, glass FRP bars, impact, pendulum crash test.