Research for AASHTO Standing Committee on Highways. Task 355. Guidelines for Reliable Fit-Up of Steel I-Girder Bridges

Steel I-girder bridges are much-used options for utilization on complex curved and/or skewed alignments. However, current practices for detailing the fit-up of cross-frames combined with challenging attributes of the framing arrangements and erection procedures often result in problems during and after construction. For example: (1) Girders and cross frames that are difficult to fit-up during erection and require unplanned contractor operations such as force fitting of connections, field drilling or field welding; (2) Erected girders with webs that are significantly out of plumb which render their performance uncertain without further evaluation; (3) Locked in stresses (in cross frames and/or girders) that were not appropriately accounted for in design; and (4) Bearings rotated beyond tolerable design limits. In certain instances, these problems have resulted in construction delays, unnecessary rework, cost and schedule overruns, and disputes and litigation. These problems can be avoided by developing a better understanding of the ways in which the framing arrangements, cross-frame detailing practices and erection procedures affect fit-up during steel erection. The objective of this research is to propose design and detailing guidelines to ensure reliable fit-up of curved and/or skewed steel I-girder bridges. These guidelines will provide a clear understanding of the implications of various framing arrangements, fit-up conditions for detailing, and erection procedures on the resulting constructed geometry, ease of fit-up during erection, and locked-in stresses in the cross-frames and/or girders.

Language

  • English

Project

  • Status: Completed
  • Funding: $100000.00
  • Contract Numbers:

    Project 20-07, Task

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Dekelbab, Waseem

  • Performing Organizations:

    Georgia Institute of Technology, Atlanta

    North Avenue NW
    Atlanta, GA  United States  30332
  • Principal Investigators:

    White, Donald

  • Start Date: 20140520
  • Expected Completion Date: 0
  • Actual Completion Date: 20150519
  • Source Data: RiP Project 38174

Subject/Index Terms

Filing Info

  • Accession Number: 01547352
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-07, Task
  • Files: TRB, RiP
  • Created Date: Dec 6 2014 1:01AM