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Fatigue Impacts on Bridge Cost Allocation and Truck Size and Weight Restrictions
Author(s) and Affiliation(s):
Jeffrey A. Laman, Department of Civil and Environmental Engineering Thomas E. Boothby, Architectural Engineering Department The Pennsylvania State University, University Park, PA
Principal Investigator:
Jeffrey A. Laman
Federal Highway Administration
Research Start Date:
January 1996
Expected Completion Date:
August 1996
Research Objectives:
The cost allocation model currently under development by the Federal Highway Administration must consider costs attributable to various fleet mixes of weight and vehicle classes based on the costs of repair, rehabilitation, replacement, and safety improvement. This study will develop a tool to apportion damage due to fatigue in steel bridges and cumulative damage to concrete decks as a function of the truck class, weight group, and highway class. The current cost allocation model contains 20 vehicle classes with 30 weight groups. This matrix of vehicle class and weight groups is considered on each of twelve functional classes of highway. A sample of bridges will be selected from the National Bridge Inventory to represent steel bridges for the simulations.
Expected Products or Deliverables:
This work will result in a general tool which is capable of simulating the movement of any number of trucks from a predefined database over any number of bridge structures. The bridge structures must be of a type that can be modeled by the semi-continuum method. Results will be immediately transferable to a highway cost allocation study.

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