Flexural Behaviors of Damaged Full-Scale Highway Bridge Girder Strengthened by External Post Tension

A large percentage of bridges in Canada were constructed over thirty years ago and their condition steadily declining. A product of deterioration and corrosive environments, many structures have been rendered unfit as per design codes and [are] structurally unsound. Constructing new structures and conventional repair methods are financially costly. A solution lies in fibre reinforced polymers (FRP). This thesis summarizes experimental projects regarding FRP usage in field applications. An actual damaged bridge girder was removed and rehabilitated with the FRP system. It was loaded incrementally and statically, nearing failure, investigating the reliability of the rehabilitation technique proposed to revive strength capacity to an acceptable level. A finite element computer simulation was created, modeling the load-history of the rehabilitated girder, as well as three full-scale damaged duble-tee girders, recently rehabilitated and loaded to collapse. This full-scale testing program and computer replication shall provide engineers with confidence in using FRP technology in girder strengthening.

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Ambient vibration testing of Berta Highway Bridge with post-tension tendons

Steel and Composite Structures ◽

10.12989/scs.2014.16.1.021 ◽

2014 ◽

Vol 16 (1) ◽

pp. 21-44 ◽

Cited By ~ 1

Author(s):

Fatma Nur Kudu ◽

Alemdar Bayraktar ◽

Pelin Gundes Bakir ◽

Temel Turker ◽

Ahmet Can Altunisik

Keyword(s):

Ambient Vibration ◽

Highway Bridge ◽

Vibration Testing ◽

Ambient Vibration Testing ◽

Post Tension

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Full-scale test of concrete-steel hybrid bridge girders

Canadian Journal of Civil Engineering ◽

10.1139/l97-055 ◽

1998 ◽

Vol 25 (1) ◽

pp. 96-103 ◽

Cited By ~ 1

Author(s):

Joost van Leeuwen ◽

Perry Adebar

Keyword(s):

Reinforced Concrete ◽

Precast Concrete ◽

Companion Paper ◽

Full Scale ◽

Dead Weight ◽

Deck Panels ◽

Hybrid Bridge ◽

Service Load ◽

Bridge Girder ◽

Maximum Crack

A full-scale laboratory test was conducted on a unique hybrid bridge girder with a reinforced concrete web and steel flanges. Half-width precast concrete deck panels were compositely attached to the top steel flange of a 17.1 m long hybrid girder to construct a "half-bridge" that was tested to study the service load behaviour and the behaviour under increasing load until failure. It was observed that the concrete web of the hybrid girder cracked because of the combination of dead weight and restrained shrinkage. Under the service loads, the concrete web had numerous closely spaced cracks that were reasonably well controlled - the maximum crack width was 0.20 mm. Although there was significant diagonal cracking in the web of the girder, the ultimate behaviour was dominated by flexure. This paper presents the methods used to construct and test the half-bridge, and a summary of the important results. A companion paper presents a detailed analysis and discussion of the test results. Key words: bridges, composite, cracking, girder, hybrid, reinforced concrete, structural design, tests.

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40-Year-old full-scale concrete bridge girder strengthened with prestressed CFRP plates anchored using gradient method

Composites Part B Engineering ◽

10.1016/j.compositesb.2006.11.003 ◽

2007 ◽

Vol 38 (7-8) ◽

pp. 878-886 ◽

Cited By ~ 55

Author(s):

Christoph Czaderski ◽

Masoud Motavalli

Keyword(s):

Gradient Method ◽

Full Scale ◽

Concrete Bridge ◽

Bridge Girder

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Analyzing pre-stressed steel arch beams

Challenge Journal of Structural Mechanics ◽

10.20528/cjsmec.2018.03.003 ◽

2018 ◽

Vol 4 (3) ◽

pp. 95

Author(s):

Erkan Polat ◽

Barlas Özden Çağlayan

Keyword(s):

Full Scale ◽

Structural Behavior ◽

Element Analysis ◽

Load Carrying ◽

Analysis Computer ◽

Post Tension ◽

Pass Through ◽

Full Scale Tests ◽

Analysis Computer Program ◽

Day By Day

Techniques are being developed day-by-day to make it possible to pass through larger openings using smaller beam-column sections. Parallel to this trend, there is another necessity to produce not only smaller but also more economical and architecturally attractive beams. The aim of this study is to explain the structural behavior of steel arch beams reinforced using post-tension cables. Due to the effect of these, the arch beam load carrying capacity increases and a smaller sized optimized section can be obtained with a better architectural view. Moreover, it also allows better mechanical and applicable solutions for buildings. For a better understanding of the behavior of the reinforced beam, a steel beam and a steel arch beam with post-tensioned cables were modeled and analyzed using the SAP2000 finite element analysis computer program and compared with each other. In addition, full-scale specimens were prepared for testing to determine the structural behavior and compare the results with those from the computer modeling, the outcome of which was very promising. The similarity between the results inferred that no extra engineering knowledge and effort are needed to design such beams. The predicted (and proved by the testing) beam bearing capacity was 35% higher than that of the unreinforced beam. With just three full-scale tests completed, it was evident that the ratio (35%) could be increased by adjusting the cable post-tension force on much smaller sized beams.

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