On the use of steel-free concrete bridge decks in continuous span bridges

1999 ◽  
Vol 26 (5) ◽  
pp. 667-672 ◽  
Author(s):  
A A Mufti ◽  
J P Newhook
Keyword(s):  
Bridge Deck ◽  
Steel Reinforcement ◽  
Experimental Program ◽  
Concrete Bridge ◽  
Reinforced Polymers ◽  
Bridge Structures ◽  
Negative Moment ◽  
Fibre Reinforced Polymer ◽  
Concrete Bridge Deck ◽  
Negative Bending

This note discusses the use of the steel-free concrete bridge deck technology in continuous span bridge structures. Conventional slab-on-girder design often utilizes the longitudinal steel reinforcement in the deck to resist the negative bending moments created at the internal piers of continuous bridges. The steel-free bridge deck is devoid of all internal steel reinforcement and hence requires an alternate design approach which is presented in this note. A key aspect of this approach is the recommended use of fibre-reinforced polymer reinforcement to control cracking of the deck over the intermediate supports. Limiting these crack widths is essential to the durability performance of the concrete, particularly in freeze-thaw environments. The results of an experimental program are also reviewed. The tensile stresses from the global longitudinal negative moment are shown to have little effect on the punching behaviour of the slab. It is noted that the concepts presented in this note were utilized in the construction of a three-span highway bridge which incorporated the steel-free bridge deck technology.Key words: bridges, design, continuous span, concrete decks, punching-shear, fibre-reinforced polymers.

scholarly journals Detection of Delamination with Various Width-to-depth Ratios in Concrete Bridge Deck Using Passive IRT: Limits and Applicability

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3996 ◽  
Author(s):  
Van Ha Mac ◽  
Quang Huy Tran ◽  
Jungwon Huh ◽  
Nhu Son Doan ◽  
Choonghyun Kang ◽  
...  
Keyword(s):  
Bridge Deck ◽  
Concrete Specimen ◽  
Concrete Bridge ◽  
Bridge Inspection ◽  
Ir Camera ◽  
Structure Surface ◽  
Bridge Structures ◽  
Bridge Deck Inspection ◽  
Concrete Bridge Deck ◽  
Good Agreement

In bridge structures, concrete decks have a higher risk of damage than other components owing to the direct impact of traffic. This study aims to develop a comprehensive system for bridge inspection using passive infrared thermography (IRT). Experiments were conducted on a concrete specimen (assumed as the surface of the bridge deck) embedded artificial delaminations with different width-to-depth ratios (WTDRs). Both professional handheld IR camera (H-IRC) and a UAV mounted with an IR camera (UAV-IRC) were employed simultaneously to capture the surface temperature of the structure. The present work indicates that the passive IRT technique with an H-IRC can be used to detect delaminations located at depths of 4 cm or less from the structure surface if the WTDRs are not lesser than 1.9 for daytime and 2.5 for nighttime when testing on a sunny day. In addition, the larger the WTDR, the higher the temperature difference can be produced, thus delaminations could be observed more clearly. Furthermore, our study suggests that the concrete bridge deck inspection using passive IRT can produce appropriate results if the inspection is performed from 10:00 to 15:00 or from 19:30 to approximately 2:00 on a sunny day. Good agreement between the results obtained from tests using H-IRC and UAV-IRC was observed, which validates the application of UAV-IRC in real structure inspection.

Performance evaluation of innovative concrete bridge deck slabs reinforced with fibre-reinforced-polymer bars

2007 ◽  
Vol 34 (3) ◽  
pp. 298-310 ◽  
Author(s):  
Brahim Benmokrane ◽  
Ehab El-Salakawy ◽  
Amr El-Ragaby ◽  
Sherif El-Gamal
Keyword(s):  
Bridge Deck ◽  
Field Testing ◽  
Concrete Bridge ◽  
Element Analysis ◽  
Reinforced Polymer ◽  
Deck Slabs ◽  
Bridge Deck Slabs ◽  
Fibre Reinforced Polymer ◽  
Concrete Bridge Deck ◽  
Frp Bars

This paper presents the construction details, field testing, and analytical results of six innovative concrete bridges reinforced with fibre-reinforced-polymer (FRP) bars recently constructed in North America, namely Wotton, Magog, Cookshire-Eaton, Val-Alain, and Melbourne bridges in Quebec, Canada, and Morristown bridge in Vermont, USA. All six bridges are girder type, with main girders made of either steel or prestressed concrete. The main girders are supported over spans ranging from 26.2 to 50.0 m. The deck is a 200–230 mm thick concrete slab continuous over spans of 2.30–3.15 m. Different types of glass- and carbon-FRP reinforcing bars and conventional steel were used as reinforcement for the concrete deck slab. The six bridges are located on different highway categories, which means different traffic volume and environmental conditions. The bridges are well instrumented at critical locations for internal temperature and strain data collection using fibre optic sensors. These sensors are used to monitor the deck behaviour from the time of construction to several years after the completion of construction. The bridges were tested for service performance using calibrated truckloads. In parallel, a finite element analysis (FEA) was conducted and verified against the results of the field load tests. The FEA was then used to run parametric studies to investigate the effect of several important parameters such as FRP reinforcement type and ratio on the service and ultimate behaviour of these bridge decks. The analytical and field results under real service conditions, in terms of deflections, cracking, and strains in reinforcement and concrete, were comparable to those of concrete bridge deck slabs reinforced with steel.Key words: bridges deck slabs, fibre-reinforced-polymer (FRP) bars, field testing, finite element analysis.

Use of fibre reinforced polymer reinforcement integrated with fibre optic sensors for concrete bridge deck slab construction

2000 ◽  
Vol 27 (5) ◽  
pp. 928-940 ◽  
Author(s):  
Brahim Benmokrane ◽  
Habib Rahman ◽  
Phalguni Mukhopadhyaya ◽  
Radhouane Masmoudi ◽  
Mohammed Chekired ◽  
...  
Keyword(s):  
Bridge Deck ◽  
Field Application ◽  
Concrete Bridge ◽  
Fibre Optic ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Frp Reinforcement ◽  
Concrete Bridge Deck ◽  
Concrete Deck ◽  
Deck Slab

The use of corrosion free fibre reinforced polymer (FRP) composites as reinforcement to concrete is currently being seen as a promising option to generate durable concrete structures. However, there exists very little credible information about its field application and performance. This paper describes the Joffre Bridge project, in Sherbrooke (Québec, Canada), over the St-François River, where Carbon Fibre Reinforced Polymer (CFRP) was used as reinforcement for a portion of the concrete deck slab. The bridge consists of five longitudinal spans with lengths varying from 26 to 37 m. Each span has a concrete deck supported by five steel girders at 3.7 m. A part of the concrete deck slab (7.3 × 11.5 m) and a portion of the traffic barrier and the sidewalk were reinforced with Carbon (CFRP) and Glass Fibre Reinforced Polymer (GFRP) reinforcement. The bridge was extensively instrumented with many different types of gauges, including integrated fibre optic sensors (FOS) into FRP reinforcement. The performance of the bridge had been assessed under static and dynamic loading using calibrated heavy trucks. Moreover, structural design and construction details of the bridge and instrumentation were performed. The results from calibrated field tests on the bridge are presented in this paper.Key words: concrete bridge deck, FRP reinforcement, fibre optic sensors (FOS), field calibrated tests, performance monitoring.

Composite behavior of precast concrete bridge deck-panel systems

PCI Journal ◽  
2011 ◽  
Vol 56 (3) ◽  
pp. 43-59 ◽  
Author(s):  
Sean R. Sullivan ◽  
Carin L. Roberts-Wollmann ◽  
Matthew K. Swenty
Keyword(s):  
Bridge Deck ◽  
Precast Concrete ◽  
Concrete Bridge ◽  
Concrete Bridge Deck

Full Depth Precast and Precast, Prestressed Concrete Bridge Deck Panels

PCI Journal ◽  
1995 ◽  
Vol 40 (1) ◽  
pp. 59-80 ◽  
Author(s):  
Mohsen A. lssa ◽  
Ahmad-Talalldriss ◽  
lraj I. Kaspar ◽  
Salah Y. Khayyat
Keyword(s):  
Prestressed Concrete ◽  
Bridge Deck ◽  
Concrete Bridge ◽  
Deck Panels ◽  
Concrete Bridge Deck ◽  
Prestressed Concrete Bridge ◽  
Precast Prestressed Concrete
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