Structural Conditions Assessment and Monitoring of a 56-Year-Old Partially Relieved Graving Dry Dock
Publication: Ports 2022
ABSTRACT
This paper enumerates the research, codes, methods, means, analyses, and testing used in successful detailed structural conditions assessment and monitoring of a partially relieved dry dock in an undisclosed location built in 1960s to carry higher loads of modern ships than that were envisioned in its original design. Strategies for successful concrete coring, testing of cores, and results of petrographic evaluations are briefly discussed. The paper presents how to derive lateral earth and pore pressures for a relieved system under operational and design extreme flood using flow nets, and benchmarking those analyses against observed performance during historical storm events. The 3-D and 2-D finite element models used for the assessments are described. The complexities and the innovative methods and materials used for installation of piezometers for permanent groundwater pressure monitoring are described. Groundwater monitoring, displacement monitoring, and their evaluations are also presented briefly. The paper also discusses the pitfalls of conventional analyses, and common mistakes made by structural engineers and finite element analysts.
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Ports 2022
Pages: 629 - 647
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Published online: Sep 15, 2022
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