Red River Waterway Thermal Studies. Report 2. Thermal Stress Analyses

Abstract : This report is the second of a series documenting the findings of the Red River Waterway Thermal Study. It includes the results of thermal and incremental construction analyses of a typical navigation lock chamber monolith and an upper-gate bay monolith for Locks and Dams 4 and 5, Red River Waterway. Also analyzed was a typical dam weir section. These analyses were conducted using a general-purpose heat transfer and stress analysis finite element program which included a time-dependent cracking material model for concrete. Results of thermal properties tests and climate data were used to describe thermal boundary conditions, forcing functions, and thermal properties for the thermal analyses. Results of mechanical properties tests were used to calibrate and verify the time-dependent material model. Concrete mixtures with up to 50-percent replacement of Type II cement with Class C fly ash were studied. Results of two- and three-dimensional finite-element analyses were used to recommend lift heights, placement temperatures, and insulation requirements for construction. Concrete construction, Finite-element, Mass concrete, Concrete mixtures analyses, Stress and strain, Dams, Locks.