Reliability-Based Assessment of Navigation Structuresby Mary Ann Leggett, U.S. Army Engineer Waterways, Experiment Station, Vicksburg, United States,
Reed L. Mosher, U.S. Army Engineer Waterways, Experiment Station, Vicksburg, United States,
Abstract: In 1989, the Director of Civil Works, U.S. Army Corps of Engineers (HQUSACE), requested regional assessments of the future modernization needs of Corps Divisions with significant inland navigation missions. Due to the limited amount of funding available for maintenance, rehabilitation, or replacement of aging navigation structures, the 1989 assessments will aid in forming a nationwide planning and prioritization system. In 1990, the Inland Waterways User's Group began formulating this information into an economic traffic-based national evaluation model, the General Equilibrium Model (GEM). As work on the GEM model progressed, the user's group realized that a navigation structure's current condition should also be considered. Therefore, the Structures Branch of the Engineering Division at HQUSACE brought together a multidisciplinary team to determine the feasibility of modeling a navigation structure's condition. Use of this reliability-based model is now required to assess the current condition of structures under consideration for major rehabilitation by the Corps. The purpose of this paper is to present the findings of the multidisciplinary team, and to review progress to date on this reliability-based model.
Subject Headings: Structural reliability | Navigation (geomatic) | Structural models | System reliability | Rehabilitation | Equilibrium | Structural systems
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