Torsional Safety of Highway Traffic Signal and Signage Support Structures

The goal of this research is to study the load transfer of axially loaded drilled shafts in torsion and to evaluate existing methods used to design drilled shaft under torsional loading. This work will provide necessary data for tuning the design methods as the torsional capacity of these shafts will be evaluated, including torsional load transfer. Existing design procedures will be investigated, as will some of the newer approaches that have been developed but not yet validated. The research results will be compared to existing methods obtained from the literature review. Recommendations will be proposed regarding the appropriate use of either existing design formulas or for new formulations developed to best estimate torsional safety (resistance and rotation displacement behavior) based on the test results to support increased loading that traffic structures have been subjected to. The project focuses on traffic structures such as signal and sign poles. These structures, combined with longer arm lengths, have seen an increase in the torsional to bending moment forces that they support. This has led to torsion loading controlling the foundation design for some of these structures, which had not been the case before for these types of structures. This focus means that our research is particularly relevant to Pacific Northwest Transportation Consortium (PacTrans) theme #3: Technological Impacts of Safety.

Language

  • English

Project

  • Status: Completed
  • Funding: $20971
  • Contract Numbers:

    DTRT13-G-UTC40

  • Sponsor Organizations:

    Pacific Northwest Transportation Consortium

    University of Washington
    More Hall Room 112
    Seattle, WA  United States  98195-2700
  • Managing Organizations:

    Oregon State University, Corvallis

    Department of Civil Engineering
    202 Apperson Hall
    Corvallis, OR  United States  97331-2302
  • Project Managers:

    Barbosa, Andre

  • Performing Organizations:

    Oregon State University, Corvallis

    Department of Civil Engineering
    202 Apperson Hall
    Corvallis, OR  United States  97331-2302
  • Principal Investigators:

    Barbosa, Andre

  • Start Date: 20151216
  • Expected Completion Date: 20161215
  • Actual Completion Date: 20160915
  • USDOT Program: University Transportation Centers
  • Subprogram: Research
  • Source Data: http://depts.washington.edu/pactrans/research/projects/torsional-safety-of-highway-traffic-signal-and-signage-support-structures-year-4-2015-2016/

Subject/Index Terms

Filing Info

  • Accession Number: 01629719
  • Record Type: Research project
  • Source Agency: Pacific Northwest Transportation Consortium
  • Contract Numbers: DTRT13-G-UTC40
  • Files: UTC, RiP
  • Created Date: Mar 22 2017 1:42PM