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Podium Presentation at the Conference, with Full Paper in Conference Proceedings

Accelerated Pavement Testing and Instrumentation

Session: AIRFIELDS - Accelerated Pavement Testing & Instrumentation

1372045 - Assessment of Dynamic Interaction Between In-Pavement Light Fixtures and Aircraft Wheel Load Through Accelerated Pavement Testing

Friday, June 16, 2023
11:30 AM – 11:45 AM CST
Room: 400
TRACK: I

    Primary Author(s)

  • Hasan A. Kazmee

    Staff Civil Engineer 2
    Applied Research Associates, Inc.
    Egg Harbor Township, NJ, United States

    • Presenter(s)

  • Hasan A. Kazmee

    Staff Civil Engineer 2
    Applied Research Associates, Inc.
    Egg Harbor Township, NJ, United States

    • Co-Author(s)

  • Murphy Flynn, B.S. Engineering

    Manager Airport Pavements R&D
    Federal Aviation Administration
    Atlantic City Airport, New Jersey, United States

  • TP

    Timothy A. Parsons, PE

    Principal Engineer
    Applied Research Associates
    EHT, NJ, United States

  • Leigh E. Ayers

    Civil Engineer
    Applied Research Associates, Inc. (ARA
    Chatsworth, New Jersey, United States

Failure of in-pavement light fixtures prompted the Port Authority of New York and New Jersey (PANYNJ) to conduct an in-depth evaluation of the in-service light fixtures in their jurisdiction followed by an instrumentation study. For the study, the L-868B light fixture bases were instrumented with four horizontal and four vertical strain gauges. The Federal Aviation Administration (FAA) embarked on a study in 2019 to investigate four different configurations of L-850 light fixtures and corresponding bases with the same instrumentation configuration. Total eight fixtures with varying combinations of spacer rings, studs, and extension were embedded and instrumented in a conventional flexible pavement test bed. The installed fixtures were subjected to impulse, static, and dynamic loading conditions. This paper summarizes the interaction between light fixtures and slow-rolling aircraft wheel load in terms of observed strains. Following a pre-defined lateral wander, the test items were trafficked at five different incremental load levels using a 3D-gear traversing bidirectionally at a consistent speed of 4 km/h (2.5 mph). Variations in strains along the two axial directions were examined against the nine different wander tracks. The transition of polarity in base strains with loading distance indicated a larger zone of influence than that from the direct impact of the moving wheel loads on the fixtures.

Learning Objectives:

Attendees can expect to learn the following from this session:
  • The participants will know about incidents of failure in light fixtures at Port Authority of New York and New Jersey (PANYNJ) that prompted the current study.
  • The participants will know about the accelerated pavement testing setup used to study the behavior of light fixture bases constructed according to the FAA specifications.
  • The participants will learn about the strain responses inside the light fixture bases due to slow-rolling aircraft replicated by a 3D-gear.