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Ppt bridges & types
This document discusses different types of bridge structures and their characteristics. It covers common bridge substructures like piers, abutments, and foundations. It then examines various superstructure types including slab bridges, plate girders, trusses, arches, cable-stayed, suspension, and movable bridges. For each type it provides details on their advantages, disadvantages, common span lengths, construction considerations, and limitations. It also discusses bridge inspection and protection methods.
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Ppt bridges & types
- 3. Substructure: • Piersand Abutments • Wing walls and Returns • Foundation Bearings Superstructure or Decking
- 8. Type of superstructures •Slab (9m)
- 9. • Minimum depthfor short spans • Ease of design and detail • Aesthetic for small stream crossings • Not the most economical solution • Requires formwork structure • Limited span length
- 11. ADVANTAGES & DISADANTAGES •Helpful for short spans. • Long distances are normally covered by placing the beams on piers • Costly even for rather short spans, since expensive steel is required as a construction material • Sagging tendency is increased when the bridge span or load is increased.
- 13. • Fairly simple •Easy to install and maintain • Extremely rugged • Small deflections • low strength to weight ratio • Plate girders have limited spans • Limited visibility through the structure
- 14. • Simply supported(30 to 375m) • Cantilevered combination (550m)
- 15. • Economical ToBuild • Very Strong • Road Placement • Built In Difficult Places • Complicated Design • Maintenance • Waste of Materials • Very Heavy
- 16. • Small Spans(3 To 15m) • Steel Arch (519m) • Concrete Arches (305m)
- 17. • Provide HigherLevels Of Resistance • Made From Virtually Anything • Stronger The More They Work • Spans Of The Bridge Are Limited • Require Extra Maintenance • Take A Long Time To Build
- 19. • Span ofGreat Lengths • Flexibility • Simple Construction • Soft Ground Issues • Too Flexible • Cannot Support High Traffic
- 21. • Good formedium spans • Greater stiffness • Can be constructed by cantilevering out from the tower • Cables won't break under extreme temperature • Typically more expensive than other types of bridge • Wind is a big factor. It can rock the bridge side to side, causing the cables to become lose
- 22. Flexibility ofsuperstructure • Fixed span superstructure • Movable span bridges
- 23. • Deck bridges •Through bridges • Semi through bridges
- 24. • Simply supported •Continuous • Cantilever
- 25. Method of clearancefor navigation
- 26. • Temporary bridges •Military (pontoon, bailey) • Permanent bridges
- 27. • Causeway • High-level •Submersible
- 28. • Locating voidsand delamination's in bridge pavements and scour around bridge support columns. • Determining location and types of reinforcing steel in concrete Ensuring quality control on new concrete installations
- 29. • Protective Coatings •Barrier Coatings • Metallizing
- 30. • Security fencing •Bridge mounted • Roof mounted