Transcription of Chapter 5 Concrete Structures Contents
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Chapter 5 Concrete Structures Contents
WSDOT Bridge Design Manual M Page 5-i June General .. Materials .. Concrete .. Reinforcing Steel .. Prestressing Steel .. Prestress Losses .. Prestressing Anchorage Systems .. Post-Tensioning Ducts .. Design Considerations .. Service and Fatigue Limit States .. Strength-Limit State .. Strut-and-Tie Model .. Deflection and Camber .. Construction Joints .. Inspection Access and Lighting .. Reinforced Concrete Box Girder Bridges .. Box Girder Basic Geometries .. Reinforcement .. Crossbeam .. End Diaphragm .. Dead Load Deflection and Camber .. Thermal Effects .. Hinges .. Drain Holes .. Hinges and Inverted T-Beam Pier Caps .. Bridge Widenings .. Review of Existing Structures .. Analysis and Design Criteria .. Removing Portions of the Existing structure .. Attachment of Widening to Existing structure .. Expansion Joints.
2. Prestressed Concrete Girders. The nominal 28-day concrete compressive strength (ƒ' c) is 7.0 ksi. Where higher strengths would eliminate a line of girders, a maximum of 10.0 ksi can be specified. Slab girders should be limited to 8.0 ksi. The nominal concrete compressive strength at release (ƒ' ci) is 6.0 ksi. Where
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