1. IIT Madras, SERC Madras, Anna Univ., INSDAG
STEEL BRIDGES
INTRODUCTION
CLASSIFICATION
LOADS & LOAD COMBINATIONS
ANALYSIS
PLATE GIRDER BRIDGES TRUSS BRIDGES SUMMARY
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

2. IIT Madras, SERC Madras, Anna Univ., INSDAG
INTRODUCTION
Advantages of Steel Bridges
Dead Load to Live Load Ratio is Lower
Longer spans, Lesser pier and foundation cost
Lesser Construction Depth
Lesser cost of embankment
Rapid Construction
Lower cost of money, Lesser disruption of traffic
Less Disruption to Traffic in Urban Environment
Lesser economic loss to community
Better Performance
Under fatigue, seismic load, impact load, blast load
Longer Life
Lower Life Cycle Cost
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

3. IIT Madras, SERC Madras, Anna Univ., INSDAG
CLASSIFICATION
Type of Traffic
Railway, Highway, Rail cum Roadway
Type of Main Structural System
Beam, Girder, Truss, Arch, Stayed, Suspended
Position of Carriage way
Deck type, Through type, Sem-through type
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

4. TYPES OF BRIDGES AND SPAN RANGES
Type of Bridge
Cable suspended bridge
Cable stayed bridge
Arch Bridge
Rigid Frame Bridge
Girder Bridges
Span Ranges (meters)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

5. MAIN STRUCTURAL SYSTEM
Girder Bridge
Plate Girder Orthotropic Deck
Box Girder
Truss Girder Composite Deck
Rigid Frame Bridges
Arch Bridges
Cable Stayed Bridges
Cable Suspended Bridges
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

6. IIT Madras, SERC Madras, Anna Univ., INSDAG
PLATE GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

7. IIT Madras, SERC Madras, Anna Univ., INSDAG
PLATE GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

8. IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

9. IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

10. IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

11. IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

12. BOX GIRDER BRIDGE (Composite Deck)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

13. BOX GIRDER BRIDGE (Orthotropic Deck)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

14. TRUSS BRIDGE (suspended central span)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

15. TRUSS BRIDGE (continuous span)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

16. TRUSS BRIDGE (sloping chord)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

17. TRUSS BRIDGE (Bailey Bridge)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

18. IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

19. TRUSS BRIDGE (connection gusset)
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

20. IIT Madras, SERC Madras, Anna Univ., INSDAG
ARCH BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

21. CABLE SUSPENDED BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

22. CABLE SUSPENDED BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

23. CABLE SUSPENDED BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

24. IIT Madras, SERC Madras, Anna Univ., INSDAG
CABLE STAYED BRIDGE
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG

25. IIT Madras, SERC Madras, Anna Univ., INSDAG
SUMMARY
Different types of Bridge systems are economical over different span lengths
Details of common bridge systems were discussed
An example of truss type bridge was presented
Construction details of a suspension bridge was presented.
STEEL BRIDGES Teaching Resource in Design of Steel Structures
IIT Madras, SERC Madras, Anna Univ., INSDAG