Finite Element Analysis of Coupled Heat and Moisture Transfer in Concrete Subjected to Fire

Tenchev, Rosen T.; Li, Long-yuan; Purkiss, J. A.

doi:10.1080/10407780152032839

Cited by 93 publications

(92 citation statements)

References 20 publications

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“…Among others, we refer here to the works by Majumdar et al (1995); Jooss and Reinhardt (2002); Feraille-Fresnet et al (2003); Chung and Consolazio (2005) and Zeim et al (2008). The proposal by Mindeguia et al (2010) also takes into account chemically bound water diffusion while Tenchev et al (2001Tenchev et al ( , 2005 consider the coupling of a hygro-thermal model with the mechanical damage model by Ortiz (1985).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic gradient-based poroplastic theory for concrete under high temperatures

Ripani

Etse

Vrech

et al. 2014

International Journal of Plasticity

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Concrete materials subjected to long term exposures to high temperatures suffer severe degradations in its mechanical properties (cohesion, friction, strength and stiffness) and changes in their failure mechanisms. These degradations may lead to irreversible damage or sudden collapse of the related structures. From the predictive analysis stand point, accurate constitutive theories are required to simulate the variations of concrete mechanical failure behavior under high and durable temperature fields. In the realm of the smeared crack approach, non-local model strategies are required to objectively reproduce failure behaviors under coupled thermo-mechanical loading conditions, while realistic descriptions of the involved characteristic lengths are needed to objectively reproduce the variation from ductile to brittle failure modes depending on the acting confining pressure and temperature. In this work, a thermodynamically consistent gradient poroplastic model for concrete subjected to high temperatures is proposed. A particular and simple form of gradient-based poroplasticity is considered whereby the state variables are the only ones of non-local character. The degradations of these variables due to coupled thermo-mechanical effects are described in the framework of the thermodynamic approach. After describing the material formulation, numerical analyses are presented which demonstrate the predictive capabilities of the proposed constitutive theory for different stress paths and thermal conditions.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic gradient-based poroplastic theory for concrete under high temperatures

Ripani

Etse

Vrech

et al. 2014

International Journal of Plasticity

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“…The coupled thermo-poro-mechanical constitutive behavior of homogenous concrete has been computationally modeled [5][6][7][8]. The framework has been used to predict the time and location of thermal spall during heating [9,10].…”

Section: Introductionmentioning

confidence: 99%

Multi-Physics Modeling of Fire-Induced Damage in High-Performance Concrete

Lammi¹,

Zhou²

2014

The International Journal of Multiphysics

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“…Some other studies, just to cite a few, are devoted primarily to questions related to the skin injury [4,11] or to the degradation of the involved materials as well as to the heat and mass transfer aspects of the barriers exposed to fire [12][13][14][15][16][17][18][19]. Special attention has been given to concrete behavior and the possibility of its damage under intense thermal conditions, and in particular under fire conditions [20][21][22][23][24][25]. In this case, high temperatures give rise to high pressures at the interior, and concrete can fail due to spalling.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of wetted porous thermal barriers operating under high temperature or high heat flux

Costa

Mendonça

Figueiredo

2008

International Journal of Heat and Mass Transfer

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Porous media with high water content can be successfully used as thermal barriers to operate under high exposure temperatures and/ or high heat fluxes. Modeling and simulation of such systems presents difficulties and challenges, which are pointed and worked out in this work. Liquid water and water vapor transfers are considered, including the capillary effects for the liquid phase, as well as the air transfer inside the porous medium. Heat transfer model includes conduction, radiation, enthalpy convection, sensible heating and phase change. A realistic model is considered at the exposed boundary in what concerns mass transfer: the outflow mass transfer is dictated by the water effusion and not by the convection transfer mechanism between the exposed surface and the environment. A set of numerical aspects is detailed, concerning both the numerical modeling and the solution of the discretization equations, which are crucial to obtain successful simulations. Some illustrative results are presented, showing the potential of the wetted porous media when used as thermal barriers, as well as the capabilities of the presented physical and numerical models to deal with such systems.

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Finite Element Analysis of Coupled Heat and Moisture Transfer in Concrete Subjected to Fire

Cited by 93 publications

References 20 publications

Thermodynamic gradient-based poroplastic theory for concrete under high temperatures

Thermodynamic gradient-based poroplastic theory for concrete under high temperatures

Multi-Physics Modeling of Fire-Induced Damage in High-Performance Concrete

Modeling and simulation of wetted porous thermal barriers operating under high temperature or high heat flux

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