Navy Advanced Composite Technology in Waterfront Infrastructure; 1997 1998 Compendium of Publications
NAVAL FACILITIES ENGINEERING SERVICE CENTER FORT HUENEME United States
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In fiscal year 1991 critical U.S. Navy waterfront deficiencies amounted to a total of 1.3 billion, of which 613 million were related to pier upgrades and repairs, and an estimated 219 million were needed for new construction. About 75 of all Navy piers and wharves were over 40 years old and required increased repair and maintenance. Most of the deficiencies were due to corrosion, in particular to corrosion of steel reinforcement. To prevent this corrosion, the use of galvanized and epoxy-coated reinforcing bars rebars was investigated. A recent alternative was the use of corrosion-resistant fiber reinforced plastic FRP components including reinforcing bars, prestressing tendons, structural shapes, and unidirectional or woven fabrics. All of these were already commercially available but were used with restraint due to the limited knowledge of their long-term behavior and the lack of uniform codes or design guidances. In the meantime research was advancing rapidly and several demonstration structures had been constructed in Europe. In Japan, a government-sponsored national research project on the use of new materials in construction was focusing on the use of continuous fiber products in concrete construction. In 1992 the Naval Facilities Engineering Service Center NFESC started investigating the potential of these new materials for Navy waterfront infrastructure applications. FRP reinforcing bars for concrete reinforcement were first evaluated.
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