Journal ArticleDOI
Numerical analysis of hygro-thermal behaviour and damage of concrete at high temperature
TLDR
In this article, a computational analysis of hygro-thermal and mechanical behavior of concrete structures at high temperature is presented, and the evaluation of thermal, hygral and mechanical performance of this material, including damage effects, needs the knowledge of the heat and mass transfer processes.Abstract:
A computational analysis of hygro-thermal and mechanical behaviour of concrete structures at high temperature is presented. The evaluation of thermal, hygral and mechanical performance of this material, including damage effects, needs the knowledge of the heat and mass transfer processes. These are simulated within the framework of a coupled model where non-linearities due to high temperatures are accounted for. The constitutive equations are discussed in some detail. The discretization of the governing equations is carried out by Finite Elements in space and Finite Differences in time. Copyright © 1999 John Wiley & Sons, Ltd.read more
Citations
More filters
Journal ArticleDOI
Modelling of hygro-thermal behaviour of concrete at high temperature with thermo-chemical and mechanical material degradation
TL;DR: In this article, a mathematical model for analysis of hygrothermal behavior of concrete as a multi-phase porous material at high temperatures, accounting for material deterioration, is presented, starting from macroscopic balances of mass, energy and linear momentum of single constituents.
Journal ArticleDOI
Hygro‐thermo‐chemo‐mechanical modelling of concrete at early ages and beyond. Part I: hydration and hygro‐thermal phenomena
TL;DR: In this article, a new numerical model of hygro-thermal and hydration phenomena in concrete at early ages and beyond is presented, where all changes of material properties are expressed as functions of hydration degree, and neither as maturity nor as equivalent hydration period.
Journal ArticleDOI
How do polypropylene fibers improve the spalling behavior of in-situ concrete?
TL;DR: In this paper, the authors analyzed the effect of the amount of polypropylene (PP) fibers on the spalling behavior of normal-strength in-situ concrete without and with PP-fibers (1.5 kg/m3).
Journal ArticleDOI
Modelling of heated concrete
TL;DR: In this paper, a fully coupled non-linear formulation is designed to predict the behaviour and potential for spalling, of heated concrete structures for fire and nuclear reactor applications, with emphasis placed upon the real processes occurring in concrete during heated based on tests carried out in several major laboratories around Europe as part of the wider HITECO research programme.
Journal ArticleDOI
Effects and interactions of temperature and stress-level related damage on permeability of concrete
TL;DR: Gawin et al. as mentioned in this paper investigated damage-temperature-stress level-permeability interactions in structural concrete and found that at lower than 80% of the peak stress, the variation of permeability is small and it is slightly influenced by the stress.
References
More filters
Journal ArticleDOI
Measurements of softwoods' permeability to air: Importance upon the drying model
TL;DR: In this article, the gaseous permeability, a very sensitive factor of the model, is measured for longitudinal and transverse flow for softwood, and calculated results agree with the experiment, the orginality of which is in the nondestructive measurement of moisture profiles by conductivity.
Trasporto di calore e massa nel calcestruzzo cellulare
P. Baggio,C. Bonacina,M. Strada +2 more
TL;DR: In this article, a model for the analysis of heat moisture transfer in porous building materials is proposed based on the differential equations following the averaging procedure developed by Bear and Gray and applied to heat and mass transfer processes by Whitaker.