Hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures as a moving boundary problem

Hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures as a moving boundary problem

A mathematical model allowing coupled hygro-thermo-mechanical analysis of spalling in concrete walls at high temperatures by means of the moving boundary problem is presented. A simplified mechanical approach to account for effects of thermal stresses and pore pressure build-up on spalling is incorporated into the model. The numerical algorithm based on finite element discretization in space an...

Fully coupled, hygro-thermo-mechanical sensitivity analysis of a pre-stressed concrete pressure vessel

Following a recent world wide resurgence in the desire to build and operate nuclear power stations as a response to rising energy demands and global plans to reduce carbon emissions, and in the light of recent events such as those at the Fukushima Dai-ichi nuclear power plant in Japan, which have raised questions of safety, this work has investigated the long term behaviour of concrete nuclear ...

Thermo-hygro-chemo-mechanical Model of Concrete at Early Ages and Its Extension to Tumor Growth Numerical Analysis

A poroplastic model for hygro-chemo-mechanical damage of concrete

The paper proposes an analytical model for calcium leaching of concrete due to water. The model is set in the framework of chemically active saturated porous media. Continuum damage mechanics is used in order to develop a phenomenological poroplastic model of concrete. Two forms of damaging processes are included: mechanical, modelled with two scalar damage internal variables; chemical, related...

advances in multi-scale simulation of hygro-thermo- mechanical deformation behavior of structural concrete

this paper presents theoretical and numerical state-of-the-art information in the field of hygro-thermo-mechanical deformation simulation in structural concrete. the aspects discussed include coupled hygro-thermo-mechanical performance of porous materials including concrete, multi-scale simulation of concrete properties especially the volumetric and structural deformation performance, and the m...