Types of bridge(concept)

Types of Bridge are briefly explained in the presentations

1. Types of Bridge
(Concept)
Data Collected by:
Kushal Patel

2. DEFINITION: Bridge
•A structure made for carrying road traffic or other moving load
over a obstruction such as river, road or railway is said to be as
bridge.

3. Uses of Bridges
•Walkways
•Highways/Roads
•Railways
•Pipelines
•Connecting lands
•Crossing rivers and
canyons

4. Site Selection for Bridge
1. A straight reach of the river.
2. Steady river flow without cross currents:
3. A narrow channel with firm banks
4. Suitable high banks above high flood level on each side.

6. Site Selection for Bridge
5. Rock or other hard in erodible strata close to the river bed level.
6. Economical approaches which should not be very high or long or
liable to flank attacks of the river during floods, the approaches
Should be free from obstacles such as hills, frequent drainage
crossings, scared places, graveyards or built up areas or
troublesome land acquisition

7. Site Selection for Bridge
7. Absence of sharp curves in the approaches.
8. Absence of expensive river training works.
9. Avoidance of excessive underwater construction.

8. ECONOMIC SPAN
•THE SPAN OF THE BRIDGE WHICH REDUCES OVERALL COST OF
BRIDGE TO BE MINIMUM.
•THE OVER ALL COST OF BRIDGE DEPENDS ON FOLLOWING FACTOR:
•COST OF MATERIAL
•AVALIABLITY OF SKILLED LABOUR
•SPAN LENGTH
•CLIMATIC CONDITION

9. AFFLUX
•WHEN BRIDGE IS CONSTRUCTED THE STRUCTURES SUCH AS
ABUTMENT, WING WALL, PIERS CAUSE REDUCTION IN NATURAL
WATER WAY AREA. THIS CONTRACTION IS SAID TO BE AS AFFLUX.

10. FREEBOARD
•THE VERTICAL DISTANCE BETWEEN DESIGNED HFL AND THE MAIN
CARRYING ELEMENT

11. Types of Bridges
•Arch
•Truss
•Cantilever
•Cable-Stayed
•Suspension

12. What makes a bridge stay up?
•Forces
•Compression – a pushing
or squeezing force
•Tension – a pulling or
stretching force

13. Arch Bridges
•Keystone – the wedge-
shaped stone of an arch
that locks its parts
together
•Abutments – the
structures that support the
ends of the bridge

14. Arch Bridges
•Works by
Compression

15. Arch Bridges

16. Cold Spring Arch Bridge, Santa Barbara, CA

17. Marsh Rainbow Arch, Riverton, KS

18. Pont du Gard, Nimes, France

19. Cable-Stayed Bridges
•Piers – the vertical supporting structures
•Cables – thick steel ropes from which the decking is
suspended
•Decking – the supported roadway on a bridge

20. Cable-Stayed Bridges
•Works by Tension AND Compression

21. Cable-Stayed Bridges

22. Zakim Bridge, Boston, MA

23. Sunshine Skyway Bridge, Tampa, FL

24. Sundial Bridge, Redding, CA

25. Suspension Bridges
•Similar to Cable-Stayed
•Different construction method

26. Suspension Bridges
•Works by Tension and Compression

27. Suspension Bridges

28. Golden Gate Bridge, San Francisco, CA

29. Brooklyn Bridge, Brooklyn, NY

30. Verrazano-Narrows Bridge, New York, NY

31. Truss
Southern Pacific Railroad Bridge,
Tempe, AZ

32. Questions?