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امثلة تطبيقية لتصميم الجسور Bridge Design Examples
يناير 27, 2021
الرئيسية > Bridge Design Examples

امثلة تطبيقية لتصميم الجسور Bridge Design Examples


Reference:
U.S.Department of Transportation
Federal Highway Administration
مزود بفهرس ممتاز للانتقال الى الى تصميم عنصر ما

Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge With Commentary

1. Introduction
2. Example bridge

2.1 Bridge geometry and materials
2.2 Girder geometry and section properties
2.3 Effective flange width

3. Flowcharts
4. Design of Deck
5. Design of Superstructure

5.1 Live load distribution factors
5.2 Dead load calculations
5.3 Unfactored and factored load effects
5.4 Loss of prestress
5.5 Stress in prestressing strands
5.6 Design for flexure

5.6.1 Flexural stress at transfer
5.6.2 Final flexural stress under Service I limit state
5.6.3 Longitudinal steel at top of girder
5.6.4 Flexural resistance at the strength limit state in positive moment region
5.6.5 Continuity correction at intermediate support
5.6.6 Fatigue in prestressed steel
5.6.7 Camber
5.6.8 Optional live load deflection check

5.7 Design for shear

5.7.1 Critical section for shear near the end support
5.7.2 Shear analysis for a section in the positive moment region
5.7.3 Shear analysis for sections in the negative moment region
5.7.4 Factored bursting resistance
5.7.5 Confinement reinforcement
5.7.6 Force in the longitudinal reinforcement including the effect of the applied shear

6. Design of Bearings
7. Design of Substructure

7.1. Design of Integral Abutments

7.1.1 Gravity loads
7.1.2 Pile cap design
7.1.3 Piles
7.1.4 Backwall design
7.1.5 Wingwall design
7.1.6 Design of approach slab
7.1.7 Sleeper slab

7.2. Design of Intermediate Pier

7.2.1 Substructure loads and application
7.2.2 Pier cap design
7.2.3 Column design
7.2.4 Footing design

Appendix A - Comparisons of Computer Program Results (QConBridge and Opis)

Section A1 - QConBridge Input
Section A2 - QConBridge Output
Section A3 - Opis Input
Section A4 - Opis Output
Section A5 - Comparison Between the Hand Calculations and the Two Computer Programs
Section A6 - Flexural Resistance Sample Calculation from Opis to Compare with Hand Calculations

Appendix B - General Guidelines for Refined Analysis of Deck Slabs
Appendix C - Example of Creep and Shrinkage Calculations














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Structure
Design span L := 120⋅ft
Roadway width BW := 43⋅ft barrier face to barrier face
Girder spacing S := 9⋅ft
Skew angle θ := 0⋅deg
No. of girder Nb := 5
Curb width on deck, cw := 10.5⋅in
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Load and Resistance Factor Design (LRFD) for Highway Bridge Superstructures

https://www.fhwa.dot.gov/bridge/pubs/nhi15058.pdf

Concrete Deck Design Example

Prestressed Concrete Bridge Design Example

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