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1STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
STEEL BRIDGES
INTRODUCTION
CLASSIFICATION
LOADS & LOAD COMBINATIONS
ANALYSIS
PLATE GIRDER BRIDGESTRUSS BRIDGESSUMMARY
2STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
INTRODUCTIONAdvantages of Steel Bridges
Dead Load to Live Load Ratio is LowerLonger spans, Lesser pier and foundation cost
Lesser Construction DepthLesser cost of embankment
Rapid ConstructionLower cost of money, Lesser disruption of traffic
Less Disruption to Traffic in Urban EnvironmentLesser economic loss to community
Better PerformanceUnder fatigue, seismic load, impact load, blast load
Longer Life
Lower Life Cycle Cost
3STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
CLASSIFICATION
Type of TrafficRailway, Highway, Rail cum Roadway
Type of Main Structural SystemBeam, Girder, Truss, Arch, Stayed, Suspended
Position of Carriage wayDeck type, Through type, Sem-through type
4STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TYPES OF BRIDGES AND SPAN RANGESType of Bridge
Cable suspended
bridge
Cable stayed bridge
Arch Bridge
Rigid Frame Bridge
Girder Bridges
0 200 400 600 800 1000 1200 1400 1600 1800
Span Ranges (meters)
5STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
MAIN STRUCTURAL SYSTEMGirder Bridge
Plate Girder Orthotropic Deck
Box Girder
Truss Girder Composite Deck
Rigid Frame Bridges
Arch Bridges
Cable Stayed Bridges
Cable Suspended Bridges
6STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
PLATE GIRDER BRIDGE
7STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
PLATE GIRDER BRIDGE
8STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
9STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
10STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
11STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE
12STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE (Composite Deck)
13STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
BOX GIRDER BRIDGE (Orthotropic Deck)
14STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE (suspended central span)
15STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE (continuous span)
16STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE (sloping chord)
17STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE (Bailey Bridge)
18STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE
19STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
TRUSS BRIDGE (connection gusset)
20STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
ARCH BRIDGE
21STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
CABLE SUSPENDED BRIDGE
22STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
CABLE SUSPENDED BRIDGE
23STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
CABLE SUSPENDED BRIDGE
24STEEL BRIDGES Teaching Resource in Design of Steel Structures IIT Madras, SERC Madras, Anna Univ., INSDAG
CABLE STAYED BRIDGE
25STEEL BRIDGES Teaching Resource in Design of Steel Structures 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.