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Mid-America Transportation Center

Reducing Impact of Heavy Truck Traffics on Service Life of Bridge Structures


Researchers

  • Principal Investigator: Atorod Azizinamini (aazizinamini1@unl.edu 402-472-5106)
  • Graduate Students
  • Luke Glaser
  • Ashwani Goel
  • Project Status
    In Progress
    About this Project
    Brief Project Description & Background
    Heavy truck traffics pounds on expansion joints armors, daily and pushes the debris into joints, causing many damages. An innovative system is envisioned that will eliminate expansion joints anywhere.
    Research Objective
    The main objective of the proposed research work is to take a first step in developing a completely jointless bridge system for the type of pavements used in the region.
    Potential Benefits
    The proposed system will eliminate the safety risk associated with road closure for taking maintenance actions and result in significant saving over long period of time.
    Abstract
    The number one issue causing high maintenance costs of bridges is having expansion joints in bridge structures. The number one problem causing the deterioration of the expansion joints are combination of heavy truck traffic, temperature movements and de-icing salts. Heavy truck traffic pounds on expansion joints armors and pushes the debris into joints. This action causes the rupture of glens, such as present in strip seal or compression seal joint type. Heavy truck traffic causes fatigue of steel elements in expansion. For instance the fingers in finger plate expansion joints are subject to fatigue failure. No matter, where expansion joints are placed, at abutment or end of approach slab (semi-integral or integral systems) problem continue to exist. Heavy truck traffic, climatic temperature changes and de-icing salt factors are there to stay. The only solution is then to have better expansion joints. The search for ideal expansion joints by industry, agencies and research organizations are proven to be fruitless and expansion joints continue to be the number one maintenance problematic issue. It is said that the best joint is no joint. The objectives of this propose work is to take a first step in developing a completely jointless bridge system for the type of pavements used in the region. Under the new system there will be absolutely no joints, anywhere, even beyond the abutment. Under proposed system, the pavement and bridge deck is connected and are seamless. Approach slab is eliminated, together with supports for approach slab.
    Project Amount
    $ 57,921
    Modal Orientation
  • Highways
  • Structures
  • Technology Transfer Activities
    Heavy truck traffics pounds on expansion joints armors, daily and pushes the debris into joints, causing many damages. An innovative system is envisioned that will eliminate expansion joints anywhere.