1,721,045 research outputs found
“Reliability of the results of simplified mathematical models of concrete degradation in fire conditions
No full textApplicability of simplified models of concrete at high temperature for spalling prediction
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A multiphase approach for a unified modelling of fully and partially saturated porous materials by considering air dissolved in water
Full text linkA unified mathematical model for the hydro-thermo-mechanical behaviour of saturated and partially saturated porous media is developed to analyze saturated/unsaturated porous media considering the effects of air dissolved in water.
Physics of air dissolution and water cavitation in porous media, as well as different numerical techniques used for modelling the transition between fully and partially saturated state, are briefly discussed. The model equations are discretized by means of the Finite Element method. A correspondingly updated code is used to analyze two examples.
It is shown that considering the dissolved air had a small influence on the results of numerical simulations both for water outflow due to gravity forces (Liakopoulos test), and the fast fluid flows and cavitation accompanying water desaturation in the strain localization zone during compression test of dense sands.
However, the procedure allows for unified modelling of the partially and fully saturated media, without application of any ‘unphysical’ numerical technique
Simplified and full mathematical models of concrete degradation during slow heating to high temperature - a comparative study
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Modelling isothermal Calcium leaching in cement based composites considering effect of advection
No full textPrediction of the thermal spalling risk of concrete structures exposed to high temperatures
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Reliability of simplified mathematical models of concrete degradation at fire conditions - a comparative study
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