Nonlinear, Incremental Analysis of Mass‐Concrete Lock Monolith

Early-age finite element modelling of industrial ground floors

“…At an early age, the air-slab boundary conditions remain similar to the simple harmonic approximation, though the hydrating cement in the slab also acts as a heat source. Truman et al [2] modelled the hydration of two 2.75 m high The in situ data collected during this project show that in the subgrade, 800 mm below the slab surface, the temperature increased by several degrees during the rst couple of days after construction (Fig. 3).…”

“…Critical parameters for the thermal ow analysis are the convection coef cients for the air-slab boundary, the material thermal properties, the adiabatic temperature rise of the concrete and the ambient temperature [2]. A literature review identi ed values for the material thermal properties and suitable boundary coef cients, which are summarized in Table 1.…”

“…3). Because the slab thickness, and hence the heat generated, is signi cantly less than that considered by Truman et al [2], a subgrade thickness of 1.6 m topped by a 0.2 m thick sub-base was modelled. This is similar to the depth of 1.5 m used by Rees et al [3] when looking at the annual thermal changes under a building slab in the United Kingdom.…”

“…The relationship between element size and time-step duration can limit the model accuracy in a diffusion problem, with Truman et al [2] identifying the following relationship between the density r, capacitance C, conductivity k, element size DL and step size Dt…”

Early-age finite element modelling of industrial ground floors

“…Truman et al [2] modelled the hydration of two 2.75 m high The in situ data collected during this project show that in the subgrade, 800 mm below the slab surface, the temperature increased by several degrees during the rst couple of days after construction (Fig. 3).…”