AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms

AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms

AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms

AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms This document contains comprehensive specifications for the design of bridges vulnerable to coastal storms.

This guideline embodies new concepts not included in previous design provisions. The methods for calculating wave forces on superstructures are based primarily on numerical simulation of the state of pressure, velocity, and acceleration within the water as a wave passes under or over bridge cross sections.

AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms Coefficients needed for the numerical simulation process, known as the Physics Based Method (PBM), were developed through physical wave tank tests. Bridge failures due to storm surge and wave loading in Gulf Coast states during recent years provided limited field data that was used to further verify these methods. Also included are current-induced forces guidelines that were the results of recent research conducted at the Turner-Fairbank Highway Research Center.

AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms
SECTION 1—SCOPE
1.1—GENERAL
SECTION 2—DEFINITIONS
SECTION 3—NOTATION
SECTION 4—GENERAL
4.1—GENERAL
4.2—CLEARANCE REQUIRED TO AVOID WAVE FORCES ON SUPERSTRUCTURE
4.3—FORCE MITIGATION
4.4—FORCE ACCOMMODATION
4.4.1—General
4.4.2—Design for the Full Wave Loads
4.4.3—Fusing for Partial Loads
4.4.4—Submersible Superstructures
SECTION 5—LIMIT STATES, LOAD COMBINATIONS, AND DESIGN FORCES
5.1—LIMIT STATES AND PERFORMANCE OBJECTIVES FOR BRIDGES, OR SPANS OF BRIDGES, THAT CANNOT
BE RAISED ABOVE THE WAVE ZONE
5.2—LOAD COMBINATIONS
5.3—MINIMUM LOADS
SECTION 6—FORCES ASSOCIATED WITH COASTAL STORMS
6.1—HYDRODYNAMIC LOADS AND DESIGN PARAMETERS
6.1.1—General
6.1.2—Hydrostatic and Hydrodynamic Forces and Moments on Superstructure
6.1.2.1—General
6.1.2.2—Maximum Quasi-Static Vertical Force and Associated Forces and Moment
6.1.2.2.1—Maximum Quasi-Static Vertical Force
6.1.2.2.1a—Girder Spans
6.1.2.2.1b—Slab Spans
6.1.2.2.2—Associated Vertical Slamming Force
6.1.2.2.3—Associated Horizontal Quasi-Static Wave Force
6.1.2.2.4—Associated Moment about the Trailing Edge Due to the Quasi-static and
Slamming Forces
6.1.2.3—Maximum Horizontal Wave Force and Associated Forces and Moments
6.1.2.3.1—Maximum Horizontal Wave Force
6.1.2.3.2—Associated Quasi-Static Vertical Force
6.1.2.3.3—Associated Vertical Slamming Force
6.1.2.3.4—Associated Moment about Trailing Edge
6.1.2.4—Current Loads on Superstructure
6.1.3—Hydrodynamic Loads on Substructure
6.1.3.1—General
6.1.3.2—Forces on Exposed Piles and Columns
6.1.3.3—Forces on Exposed Pier Shafts and Walls
6.2—LEVELS OF ANALYSIS OF FORCES FROM COASTAL STORMS
6.2.1—General
6.2.2—Level I Analysis of Design Parameters
6.2.2.1—Required Information
6.2.2.2—Base Design Wind Velocity
6.2.2.3—Design Water Level
6.2.2.4—Design Wave Parameters
6.2.2.5—Maximum Water Elevation
6.2.2.6—Design Current Velocity
6.2.3—Level II Analysis of Design Parameters
6.2.3.1—General
6.2.3.2—Design Wind Velocity
6.2.3.3—Design Water Level
6.2.3.4—Reduction in Wind Velocity and Water Elevation
6.2.3.5—Design Wave Parameters
6.2.3.6—Maximum Water Elevation
6.2.3.7—Design Current Velocities
6.2.4—Level III Analysis of Design Parameters
6.2.4.1—General
6.2.4.2—Design Wind Velocity Storm Water Level, Current Velocity, and Wave Parameters

ISBN Number  : 1-56051-429-9
Item Format  : Pdf file
Item Pages  : 64
AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms


File Type : PDF File AASHTO Guide Specifications for Bridges Vulnerable to Coastal Storms



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