Reinforced concrete deck girder bridge

This is just an overview about the Reinforced Concrete Deck Girder Bridge
(RCDG Bridge)
the Presentation includes:
Materials for Construction,
Parts of a typical RCDG bridge,
The Forces Acting on the bridge, etc.

1. Reinforced Concrete Deck Girder Bridge (RCDG Bridge)

2. Materials for Construction

3. Girder / Beam Bridge The most common and basic type. Consists of a horizontal beam supported at each end by piers. The weight of the beam pushes straight down on the piers.

4. Typical Beam / Girder Bridge

5. Girder / Beam Bridge The farther apart its piers, the weaker the beam becomes. This is why beam bridges rarely span more than 250 feet .

6. Forces : When something pushes down on the beam, the beam bends. Its top edge is pushed together, and its bottom edge is pulled apart .

7. Bridge Deck The principal function of a bridge deck is to provide support to local vertical loads (from highway traffic, railway or pedestrians) and transmit these loads to the primary superstructure of the bridge .

8. Bridge Deck As a result of its function, the deck will be continuous along the bridge span and (apart from some railway bridges) continuous across the span. As a result of this continuity, it will act as a plate (isotropic or orthotropic depending on construction) to support local patch loads.

9. Link for short video presentation: https ://youtu.be/lBP7739C83s?t=39s

10. Now let us discuss the Five major parts of a Reinforced Concrete B ridge Beam/Girder Bearing Pier Cap/ Headstock Pier Pile cap and Piles

11. Beam / Girder Beam or girder is that part of superstructure structure which is under bending along the span. it is the  load bearing member which supports the deck. Span is the distance between points of support ( eg piers, abutment). Deck is bridge floor directly carrying traffic loads

12. Prestressed I Girder

13. Steel Bridge Beam Girders

14. Bearing Bearing transfers loads from the girders to the pier caps. Bearing is a component which supports part of the bridge and which transmits forces from that part to another part of the structure whilst permitting angular and/or linear movement between parts.

15. Laminated Elastomeric Bearings

16. Pier Cap / Headstock Pier Cap / Headstock is the component which transfers loads from the superstructure to the piers. Pier cap provide sufficient seating for the Bridge girders and disperse the loads from the bearings to the Piers.

17. RC Pier Cap

18. Pier Pier is that part of a part of the substructure which supports the superstructure at the end of the span and which transfers loads on the superstructure to the foundations . Depending up on aesthetics, site, space and economic constraints various shapes of piers are adopted to suit to the requirement. Mostly Reinforced Concrete or Prestressed concrete are adopted for the construction of piers. Piers are compression members. Depending on the loading and bearing articulations, piers may be subjected to bending as well.

19. Bridge Pier Substructure

20. Pile cap and Piles Pile foundation is the most commonly used foundation system for bridges. Pile is a slender compression member driven into or formed in the ground to resist loads. A reinforced concrete mass cast around the head of a group of piles to ensure they act together and distribute the load among them it is known as pile cap.

21. Completed pile cap rebar framing

22. General Span Types

23. Comparison Between Concrete Bridges

24. RC Slab Bridge

25. RCDG Bridge

26. PCDG Bridge

27. No. of Bridge Girders – No. of Lanes