Research for AASHTO Standing Committee on Highways. Task 388. Guidelines for Design and Construction of Temporary Bridges

Temporary bridges are often desired to maintain traffic during bridge reconstruction projects and are also utilized on an emergency basis to accommodate structures that are taken out of service by unforeseen circumstances such as nature or vehicular collisions. From a national perspective, the design and construction criteria for temporary bridges are an inconsistent practice among agencies. Some agencies have special provisions covering this work, while other agencies have no such provisions. Design of temporary bridges in accordance with the current AASHTO LRFD Bridge Design Specification or alternative specifications may result in potential over/under design for the following areas: Satisfying the Fatigue Limit State, and specifying details with infinite fatigue life, or a specified number of cycles; Satisfying the Extreme Event Limit State for seismic, wind, stream, and vessel impacts, where the bridge is not anticipated to be in service for a particular event recurrence interval; Satisfying exterior beam, deck overhang, and parapet loading criteria; Satisfying bridge width, striping, and end treatment criteria; Long term creep or prestressing losses in concrete elements; Design of foundations for contraction scour, local scour and long term scour, and required hydraulic opening for a given design flood event; Live Load requirements, including special and routinely permitted vehicle classes; Inspection frequency and coding requirements subject to NBI compliance; Load rating requirements; and Limited traffic for temporary bridges where certain vehicles are restricted from use. It is also desirable to provide definitions and requirements to address the anticipated service durations for “temporary” and “interim” bridges - given that these durations may vary considerably, and may require the need for different structural and safety performance. The need to define requirements regarding single-use temporary bridges/components versus multiple deployment temporary bridges/components also exists. Obtaining a national perspective of the current design and construction requirements used by agencies for the procurement of temporary bridges may lead to the development of a more consistent and unified set of performance based criteria. To achieve this goal, focused analytical studies of existing temporary bridge specifications along with comparisons to AASHTO LRFD Bridge Design Specifications, 17th Edition Standard Specifications, and the AASHTO Guide Design Specifications for Bridge Temporary Works will need to be performed. The objective of this research was to develop proposed AASHTO guidelines for design and construction of temporary bridges. The proposed guidelines should provide more consistency in the reliability and performance of temporary bridges, and offer agencies with economically feasible options that will eliminate the concerns of under/over designed temporary structures

Language

  • English

Project

  • Status: Completed
  • Funding: $100000
  • Contract Numbers:

    Project 20-07, Task 388

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Dekelbab, Waseem

  • Performing Organizations:

    AECOM Technical Services, Inc.

    Minneapolis,   United States 
  • Principal Investigators:

    Wassef, Wagdy

  • Start Date: 20160330
  • Expected Completion Date: 0
  • Actual Completion Date: 20171231
  • Source Data: RiP Project 40336

Subject/Index Terms

Filing Info

  • Accession Number: 01575811
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-07, Task 388
  • Files: TRB, RiP
  • Created Date: Sep 11 2015 1:00AM