Highway Bridge Superstructure Engineering: LRFD Approaches to Design and Analysis (Hardcover)

Introduction

Structural Design Philosophies

General Design Concepts

Fundamentals of Structural Design Philosophies

Limit States Design Philosophies

LRFD Specifications for Highway Bridges

Differences between Various Design Methods: Summary

Historical Review of AASHTO Specifications for Highway Bridges

AASHTO LRFD Highway Bridge Design Specifications and Design Philosophies

AASHTO Interim Specifications

Scope of the AASHTO LRFD Bridge Design Specifications

Commentary to AASHTO LRFD Specifications

General Comments

Appendix

References

Introduction

AASHTO LRFD Spec-Specific Highway Bridge Superstructures

Description and Design Characteristics of Superstructure Systems in Table 2.1

Diaphragms

Bridge Site and Geometry

Deflections

Consideration of Future Widening

Constructability

Bridge Esthetics

References

Introduction

AASHTO LRFD Highway Bridge Design Philosophy

Load Factors and Load Combinations for Construction Loads

Components of a Highway Bridge Structure

Dead Loads on a Highway Bridge Superstructure

Construction Loads

Live Loads on Highway Bridge Superstructures

Dynamic Effects of Vehicular Live Load

Fatigue Loading

Pedestrian Loads

Application of Design Live Loads on a Bridge Superstructure

Design Live Loads in Longitudinal Girders Supporting Bridge Decks

Envelopes for Moment and Shear Values

Tire Contact Area

Rail Transit Loads

Centrifugal Force (CE)

Braking Force (BR)

Vehicular Collision Force (CT)

Ice and Snow Loads

Wind Loads (WL and WS)

Earthquake Forces (EQ)

Earth Pressure (EH, ES, LS, and DD)

Force Effects Due to Superimposed Deformations: TU, TG, SH, CR, SE, and PS

Miscellaneous Forces for Design Considerations

Friction Forces (FR)

Appendix

References

Introduction

Load Path in Bridge Structures

Analysis for Dead Load on Bridge Superstructures

Methods of Structural Analysis for Live Load on Bridge Superstructures

Approximate Analysis Methods for Live Loads: The Distribution Factor Concept

Considerations for Live Load Distribution Factors for Common Types of Bridge Superstructures

Calculations of Distribution Factors for Beams/Girders of Typical Superstructures

Special Analysis for Distribution Factors for Bending Moments and Shears in Exterior Girders

Correction Factors for Bridge Skew

Distribution Factors for Fatigue Limit State

Distribution Factors for Deflection Limit State

Illustrative Examples: Distribution Factors for Bending Moment and Shear

Application of Live Distribution Factors for Design Purposes

Distribution Factors for Special Loads with Other Traffic Loads

Live Load Distribution Factors for Bending Moments and Shear in Transverse Floor Beams

Methods of Refined Analysis

Distribution of Lateral Loads in Multibeam Bridges

Analysis of Concrete Slabs and Slab-Type Bridges for LRFD Live Loads

Appendix

References

Introduction

Concrete Bridges and Aesthetics

Corrosion of Concrete Bridges

Material Properties

Design Procedures for Flexure in Section 5 of LRFD Specifications

Limits of Reinforcement: Art 5.7.3.3.

Control of Cracking by Distribution of Reinforcement: Art 5.7.3.4.

Service Limit State

Fatigue Limit State

Shear

Estimating the Area of Required Nonprestressed Tensile Reinforcement in Concrete Sections

Slab-Type Concrete Bridges and Concrete Decks

Concrete Decks

Design Examples

Design of Reinforced Concrete T-Beam Superstructures

Design of Deck Overhang and Barrier Walls

Slab-Precast, Prestressed Concrete Bridges

Appendix

References

Introduction

Structural Forms and Characteristics of Steel Bridges

Corrosion of Steel Bridges

Construction Considerations

Mechanical Properties of Steel for Highway Bridges

Hybrid Steel Girders

Noncomposite and Composite Sections

Shored and Unshored Construction

Resistance Factors

Design Provisions for I-Section Flexural Members

Fatigue and Fracture Considerations

Design of Noncomposite Slab?Steel Girder Superstructures

Composite Slab?Steel Beam Superstructures

Design of Composite Slab-Girder Superstructures

Appendix

References

Index