Repair of impact damaged utility poles with fiber reinforced polymers (FRP), phase II.

Details

• Creators:
  Slade, Robert A. ; Brown, Cara I. ; Mohsin, Zainab ; Mackie, Kevin R.
• Corporate Creators:
  University of Central Florida. Dept. of Civil, Environmental and Construction Engineering
• Subject/TRT Terms:
  Fatigue Tests Fiber Reinforced Polymers Flexural Strength Guidelines Installation Mechanical Tests Repairing Utility Poles
• Publication/ Report Number:
  BDV24-977-04
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  Vehicle collisions with steel or aluminum utility poles are common occurrences that yield substantial but often repairable
  
  damage. This project investigates the use of a fiber-reinforced polymer (FRP) composite system for in situ repair that
  
  minimizes potential traffic interruptions. The FRP repair system consists of a filler material to restore a circular cross-section, a primer or adhesive layer, a pre-impregnated or field-impregnated FRP laminate, and a final coating for aesthetics
  
  and UV protection. The objective of this study is to develop a set of repair guidelines that can economically and effectively
  
  restore an impact-damaged utility pole to a safe working condition. The research plan was divided into three stages. The first
  
  stage is a material characterization of the constituents of several likely FRP repair systems, including characterization of the
  
  efficacy for installation on vertical poles. The second stage investigates the component-level responses of the repair systems.
  
  Mechanical testing to failure was performed for a variety of pole and dent geometries in a standard four-point flexural test
  
  setup. The final stage involves verifying the component-level tests using full-scale poles. The poles utilized for testing
  
  included both actual poles removed from service with vehicular impact damage as well as poles with mechanically-imparted
  
  dents. All full-scale tests were performed on poles with integral base plates oriented in a cantilever configuration and
  
  subjected the specimens to flexural monotonic loads to failure, cyclic fatigue loads to failure, and impact loads simulating
  
  vehicular impact using a pendulum. Geometric irregularities in the pole and access ports (hand holes) make design of the
  
  repair systems challenging. Laminates were oriented in the longitudinal direction on the tension and compression faces with
  
  transverse (circumferential) wraps located above and below any obstructions. Results show the repairs to be effective at
  
  restoring capacity, resisting cyclic/fatigue load demands, and not prone to instability when impacted with the equivalent of a
  
  light vehicle at low speed.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5e54d72bf19b5b7f27c90016e8d6f21e2fc6d7db10190a3625ce49f083204680
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29174/dot_29174_DS1.pdf
• File Type:
  [PDF - 77.66 MB ]