Midas FEA heat transfer and hydration analysis models temperature evolution, hydration heat, equivalent age, thermal strain, and thermal stress in concrete structures.
How It Works
The general heat-transfer part covers the heat equation, heat-transfer elements, initial temperature, fixed temperature, heat flux, convection, heat generation, and staged heat-transfer results. The hydration heat part couples heat transfer to concrete material development and thermal stress analysis.
The manual uses equivalent age to connect temperature history to strength and material evolution. Thermal stress outputs include nodal displacement, element stress, tensile strength by equivalent age, and crack ratio. Crack ratio is treated as a comparison between allowable tensile stress and generated tensile stress.
Solver Development Notes
Keep temperature as a field variable with its own boundary conditions and time history.
Define whether thermal stress is solved sequentially from a temperature field or coupled in one analysis.
Preserve concrete age and temperature history when construction stages activate or transfer state.
Include thermal-stress verification cases with free expansion, constrained expansion, transient heat flow, and hydration heat.
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