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Contact Information |
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Dat Duthinh graduated with high honors from Princeton University in 1973. He obtained a Masters of Science from the University of Delaware with a thesis on the mathematical theory of elasticity, and a Ph.D. from Cornell University with a dissertation on the strength of cold-formed steel columns. Upon graduation, he joined Exxon Production Research in Houston, Texas, where he worked on the analysis and design of tubular steel offshore platforms and drilling systems. Some of the noteworthy projects Dr. Duthinh participated in while at Exxon were computer analysis of drilling risers subjected to wave and current forces, drilling vessel motion, external hydrostatic pressure, internal drilling mud pressure and temperature, and axial tension; analysis of experimental measurements of an instrumented riser joint deployed in the field; various improvements to drilling systems to allow drilling in regions of high current where vortex-induced vibrations could cause premature fatigue failure of riser connectors; structural analysis of tubular steel platforms for the Gulf of Mexico and offshore Japan; methods of calculating wave forces on tubular members; and testing of a ball joint which connects the bottom of the riser string to the blow-out preventer. He subsequently moved to Petro-Canada in Calgary, Alberta, where he was Group Leader of Applied Mechanics, and the Center for Cold Oceans Resources Engineering at Memorial University of Newfoundland, where he was Group Leader of Ice Engineering and Adjunct Professor of Civil Engineering. The Hibernia oil field had just been discovered offshore Newfoundland, in a region frequented by icebergs. Dr. Duthinh played a leading role in a decade-long effort to establish methods of avoiding icebergs and resisting iceberg impact. He participated in extensive field measurements to establish the statistics of iceberg shape, velocity, mass, towing characteristics, and strength. After the successful completion of medium-scale iceberg impact experiments with a hydraulically driven indentor in Baffin Island, Northwest Territories, Canada, Dr. Duthinh led a joint Franco-Canadian Antarctic Experiment to measure the full-scale impact of an iceberg on a fixed structure. The experiment was successfully completed against a steep rocky island in the French Antarctic base Dumont d'Urville and provided valuable design data. He also conducted model tests of a moored semi-submersible to be used for oil production, and capable of withstanding sea ice and avoiding icebergs. When the Hibernia project moved to the design and construction phase, Dr. Duthinh went to work for the principal design contractor, Doris Engineering, in Paris, France. He worked on concepts for transporting the 40 000 tons topsides to be mated to the Gravity Based Structure (GBS); on the finite-element analysis of the GBS; on the design of various parts of the GBS, which is made of high-strength concrete (70 MPa), especially the heavily reinforced intersections of very thick (1.4 m) walls to withstand iceberg impact; on verification and quality control of the design; and on methods to deal with the very large number of load cases. Dr. Duthinh’s current research at NIST is on high performance materials, specifically the shear design of high-strength concrete beams, the fire resistance of high-strength concrete, and the use of fiber reinforced plastics in construction. He advised several Masters and Ph.D. students at Memorial University of Newfoundland and the University of Paris and has more than a dozen refereed publications. |
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Dat DuthinhEducationPrinceton University, B.S., Civil Engineering, 1973University of Delaware, M.S., Structural Engineering, 1975 Cornell University, Ph.D., Structural Engineering, 1979 PositionResearch Structural EngineerStructures Group Materials and Construction Research Division Building and Fire Research Laboratory |
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Information Last updated: 2/6/2008