LRFD Bridge Design

Fundamentals and Applications

Tim Huff

• Publisher: CRC Press
• Year: 2022
• Print ISBN:
  9781032208374
  9781032208367
• Edition: 1
• eBook ISBN:
  9781000543384
• Topic: Technology & Engineering
• Subtopic: Civil Engineering
• Index: Technology & Engineering

This book examines and explains material from the 9th edition of the AASHTO LRFD Bridge Design Specifications, including deck and parapet design, load calculations, limit states and load combinations, concrete and steel I-girder design, bearing design, and more. With increased focus on earthquake resiliency, two separate chapters– one on conventional seismic design and the other on seismic isolation applied to bridges– will fully address this vital topic. The primary focus is on steel and concrete I-girder bridges, with regard to both superstructure and substructure design.

Features:

• Includes several worked examples for a project bridge as well as actual bridges designed by the author
• Examines seismic design concepts and design details for bridges
• Presents the latest material based on the 9th edition of the LRFD Bridge Design Specifications
• Covers fatigue, strength, service, and extreme event limit states
• Includes numerous solved problems and exercises at the end of each chapter to illustrate the concepts presented

LRFD Bridge Design: Fundamentals and Applications will serve as a useful text for graduate and upper-level undergraduate civil engineering students as well as practicing structural engineers.

1 Introduction

DOI: 10.1201/9781003265467-1

This course is intended for senior level undergraduate civil engineering majors with an emphasis on structural engineering, and graduate level structural engineering students. Practitioners may also find the material to be a valuable reference. After this introductory chapter (Chapter 1) on preliminary design considerations and construction stages in the life of a bridge, subsequent topics covered include the following:

• load calculations and limit states: Chapters 2 and 3
• bridge deck design: Chapter 4
• live load distribution: Chapter 5
• steel welded plate girders: Chapter 6
• prestressed concrete girder bridges: Chapter 7
• bridge girder bearings: Chapter 8
• reinforced concrete substructures and foundation design: Chapter 9
• seismic design concepts for bridges: Chapter 10
• seismic isolation applied to bridges: Chapter 11

Load and resistance factor design (LRFD) of I-girder-type bridges is the basis of the superstructure-related content in Chapters 5 through 8. Primary references for bridge design include specifications from the American Association of State Highway and Transportation Officials (AASHTO). These documents, along with the shorthand notation used for each in this book, are summarized below.

• AASHTO LRFD Bridge Design Specifications, 9^th edition (AASHTO, 2020). Hereafter referred to as the LRFD BDS.
• AASHTO Guide Specification for LRFD Seismic Bridge Design, 2^nd edition (AASHTO, 2011). Hereafter referred to as the LRFD GS.
• AASHTO Guide Specification for Seismic Isolation Design, 4^th edition (AASHTO, 2014). Hereafter referred to as the GS ISO.
• AASHTO LRFD Bridge Construction Specifications, 4^th edition (AASHTO, 2017). Hereafter referred to as the LRFD BCS.

1.1 The Project Bridge

The Project Bridge, defined by Figures 1.1 through 1.7, provides the basis for much of the discussion on the design of the various elements of a typical I-girder bridge. Some of the examples in each chapter are ...

Table of contents

• Cover
• Half-Title
• Title
• Copyright
• Contents
• Preface
• Acknowledgements
• Author biography
• Chapter 1 Introduction
• Chapter 2 Loads on Bridges
• Chapter 3 Load Combinations and Limit States
• Chapter 4 Deck and Parapet Design
• Chapter 5 Distribution of Live Load
• Chapter 6 Steel Welded Plate I-Girders
• Chapter 7 Precast Prestressed Concrete Girders
• Chapter 8 Bridge Girder Bearings
• Chapter 9 Reinforced Concrete Substructures
• Chapter 10 Seismic Design of Bridges
• Chapter 11 Seismic Isolation of Bridges
• Bibliography
• Index