作者：
YACHNIS, MDr. Arthur H. Wu:is a geotechnical engineering consultant
in the Office of the Chief Engineer Naval Facilities Engineering Command Department of the Navy Alexandria Virginia. Dr. Wu received his B.S. and M.S. degrees from the National Cheng Kung University Taiwan in 1956 and 1961 respectively his M.S. degree from Ohio State University in 1964 and his D.Sc. degree from The George Washington University in 1981. He has taught at The George Washington University U.S. Naval Academy and is an adjunct full professor at the University of the District of Columbia. He was selected as the 1985 NavFac Engineer of the Year is a fellow of the American Society of Civil Engineers and is listed in MarquisWho's Who in America. He has provided many complex geotechnical consultation services to the Navy and contributed to the application of the numerical modeling and computational mechanics in the analysis of graving drydock safety. John Cecilio:is the chief engineer for the Naval Facilities Engineering Command
Department of the Navy Alexandria Virginia. Mr. Cecilio received his B.S. degree in 1962 from Merrimack College Massachusetts and M.S. degree in 1971 from Catholic University of America in Washington D.C. As the chief engineer he is supervising twelve multi-discipline engineering consultants who are responsible for providing criteria guidance and technical assistance to resolve complex and unique design and construction problems. Mr. Cecilio is the chairman of the Certification Board for the U.S. Navy's dry-docks. He has over 27 years of experience in design and construction of complex facilities and was selected as the 1986 NavFac Engineer of the Year. He is a member of the Society of American Military Engineers and numerous professional engineering societies. Dr. Robert A. Bayles:is a research scientist at the Naval Research Laboratory (NRL)
Washington D.C. He received his B.S. degree in chemistry and physics from Lynchburg College in 1973. He received his M.S. (1975) and Ph.D. (1979) degrees in mat
Maintenance and safety certification of the Navy's graving drydocks are essential in supporting fleet operation and readiness. Thus, structural analyses of graving drydocks are made regularly by the Naval Faciliti...
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Maintenance and safety certification of the Navy's graving drydocks are essential in supporting fleet operation and readiness. Thus, structural analyses of graving drydocks are made regularly by the Naval Facilities Engineering Command using a finite element computer program. An analytical method is implemented to evaluate the structural adequacy of existing drydocks which are subjected to static and earthquake loads. The results of the analyses are used in certifying the safety of drydocks. Due to the complexity of the drydock structure, an analysis is begun by setting up structural models which can accurately include structural and geotechnical parameters for finite element numerical analysis. The accuracy of the results can then be checked through a comparison of the different models used in the analysis, and the comparison of field observations made from carefully monitored instrumentation. For example, in order to evaluate a mathematical analysis of the response of a drydock to static and earthquake loads, measurements of the movement of drydock walls in Charleston Naval Shipyard, South Carolina, were made by flooding and draining the drydock during a docking operation. A dial gauge instrument was used to measure the displacement of a wall and a laser electronic distance measuring instrument (EDM) was used to measure the displacement across the width of the dry-dock. The purpose of this paper is to present the drydock wall stability analysis method and to compare the analytical results with the observed wall displacement. Conclusions were derived from the results of the finite element analysis and the measured wall displacement. The results were useful in the structural analyses and safety certification of the graving drydocks.
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