Netherlands. paper gives an outline of a thermo-mechanical damage behaviour of concrete biaxial stress elevated ... ...,"._ .. ...,.., ......... ~ ... ....,.., is formed non-isothermal conditions, a general analysis of ~~ ............ ,L ............ '"" ............... """,,..."''"'""" behaviour concrete…
Netherlands. paper gives an outline of a thermo-mechanical damage behaviour of concrete biaxial stress elevated ... ...,"._ .. ...,.., ......... ~ ... ....,.., is formed non-isothermal conditions, a general analysis of ~~ ............ ,L ............ '"" ............... """,,..."''"'""" behaviour concrete at elevated temperatures is an assessment of integrity (strength and structures exposed to temperature as fire ov·nrt.,C'iH•a .., ...... .., .... , ... Ai-. plants, nuclear installations. This paper presents an damage concrete at temperatures. model has consistent framework thermodynamics, drawing on damage models of Ortiz (1985) and Yazdani & Schreyer (1988) coupling aspects Simo & Miehe stress-temperature descriptions thermal and Mechanical due to rn.::•.-.-Vl'11 formation, being able to ....... u_, ....... '" surfaces: the model damage, dilatation and damage model development at transient hygral diffusion thermodynamics can mechanics (Krajcinovic (1992)), coupled plasticity and damage and thermoplasticity (Armero & Simo (1992)). Consider a continuum defined on a ...,..._ ... ,.ll..,Jl.A...,..., configuration in a time interval [O, t], deformation gradient, £, stress tensor cr, associated temperature field 8(., t), entropy 11, density forces, internal dissipation is given by: =a:€+8Ti-E (1) three terms be interpreted respectively as stress power, power and change in internal energy.