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:
  • Utility poles
  • Fiber reinforced polymers
  • Repairing
  • Guidelines
  • Installation
  • Mechanical tests
  • Fatigue tests
  • Flexural strength
• 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.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29174/dot_29174_DS1.pdf
• File Type:
  [PDF - 77.66 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:5e54d72bf19b5b7f27c90016e8d6f21e2fc6d7db10190a3625ce49f083204680