Fatigue Resistance and Reliability of High Mast Illumination Poles (HMIPs) with Pre-Existing Cracks (CTR)

High Mast Illumination Poles (HMlPs) are used throughout Texas and the United States (US) to provide lighting along highways and at interchanges. Texas currently has about 5000 HMlPs, varying in height from 100 to 175 ft. In recent years, a number of HMlP collapses have been reported in other states. These collapses have been attributed to fatigue failures at the HMIP shaft-to-base plate connection. This project will generate data and information to support a probabilistic-based assessment of the remaining life of pre-cracked HMIPs. Laboratory fatigue tests will be conducted on pie-cracked galvanized HMIPs. In addition, field data will be collected and additional analyses will be conducted to characterize wind response of Texas HMIPs. Field and laboratory studies will be supplemented by finite element studies simulating the global and local response of pie-cracked HMIPs. The results of the laboratory data, field studies, and analytical studies will be combined in a reliability-based framework to provide a probabilistic assessment of the fatigue life of in-service pre-cracked HMIPs. Finally, additional information will be developed in this project on options for mitigating risk associated with cracked HMIPs, such as increased inspection and monitoring, repair techniques, and methods to reduce vortex shedding.


  • English


  • Status: Active
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Odell, Wade

  • Performing Organizations:

    University of Texas, Austin

    Center for Transportation Research
    Austin, TX  United States 
  • Principal Investigators:

    Englehardt, Michael

  • Start Date: 20140822
  • Expected Completion Date: 20180331
  • Actual Completion Date: 0
  • Source Data: RiP Project 39940

Subject/Index Terms

Filing Info

  • Accession Number: 01568394
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6829
  • Files: RiP, STATEDOT
  • Created Date: Jun 27 2015 1:00AM