Structural Design in Steel - Bridges.pdf

Structural Behavior of Steel

Chapter 6

National Steel Bridge Alliance
STEEL BRIDGE DESIGN HANDBOOK


Draft prepared for NSBA Review




by

Donald W. White
Professor
Structural Engineering, Mechanics and Materials







Prepared for
HDR Engineering, Inc.





School of Civil and Environmental Engineering
ia Institute of Technology
Atlanta, GA 30332-0355
e-mail: ******@
Phone: 404-894-5839
FAX: 404-894-0278

March 2006
Chapter 6
Structural Behavior of Steel

Table of Contents


1. INTRODUCTION ………………………………………………………………………….. 1

2. BEHAVIOR AND STRUCTURE TYPES ………………………………………………... 2
Rolled I-Section Stringer Systems ……………………………………………………... 2
General I-Section Stringer Systems ……………………………………………………. 3
Overview ………………………………………………………………………… 3
Fundamental Behavior of I-Section Stringer Systems ……………………….. 7
Integral Piers and Abutments ………………………………………………… 13
Temperature Movements ……………………………………………………... 15
Box-Section Stringer Systems ………………………………………………………… 16
Truss Bridges ………………………………………………………………………….. 21
Arch Bridges ………………………………………………………………………….. 24
Cable-Supported Bridges ……………………………………………………………... 28
General ………………………………………………………………………… 28
Suspension Bridges …………………………………………………………… 29
Cable-Stayed Bridges ………………………………………………………… 33
3. ELASTIC SYSTEM ANALYSIS, PONENT RESISTANCES …… 38
4. OVERALL SYSTEM BUCKLING VERSUS INDIVIDUAL MEMBER BUCKLING 42
Key Concepts ………………………………………………………………………….. 42
Lean-On Bracing Systems ……………………………………………………………. 45
General Consideration of System Stability Effects in Design ……………………….. 47
5. MEMBER BEHAVIOR AND DESIGN STRENGTH ………………………………….. 48
Tension Members ……………………………………………………………………… 48
Rolled or Built-Up Tension Members ……………………………………….. 48
Eyebars and P