20.500.12556/DKUM-70758 A coupled thermo-hydro-mechanical model of expansive clays subjected to heating and hydratation Združen termo-hidro-mehanični model nabrekljivih glin, podvrženih segrevanju in hidrataciji The focus of this work is to provide a numerical formulation for coupled thermo-hydro-mechanical processes in unsaturated expansive clays, especially in compacted bentonite, with a multiphase fluid flow. The model is characterized by the presence of a deformable solid matrix filled with two fluid phases (liquid water and air). In the proposed model, both pore-water and air transfers are assumed to be governed by the generalized Darcy’s law. Fully coupled, nonlinear partial differential equations are established and then solved by using a Galerkin weighted residual approach in the space domain and an implicit integrating scheme in the time domain. The model has been validated against an experimental test from the literature, which involves bentonite under laboratory conditions. The calculated relative errors between the experimental and numerical results are 3% for the temperature and 7% for the stresses. Consequently, the developed numerical model predicts satisfactory results, when compared to the experimental test measures. The model is applicable to two-dimensional problems with various initial and boundary conditions; non linear soil parameters can be easily included in this model. Članek prikazuje numerično formulacijo združenega termo-hidro-mehanskega procesa v nenasičeni nabrekljivi glini, posebej v kompaktnem bentonitu z dodajanjem tekočine v več fazah. Za model je značilna prisotnost deformabilne trdne snovi, napolnjene s tekočo vodo in zrakom. Predpostavlja se, da na pretoka porne vode in zraka vpliva posplošen Darcyjev zakon. Vpeljane nelinearne parcialne diferencialne enačbe so popolnoma vezane in jih rešimo z uporabo Galerkinovega pristopa - utežnih ostankov v prostorski domeni in implicitno integracijsko shemo v časovni domeni. Model smo primerjali z eksperimentalnim preizkusom iz literature, ki vključuje preizkus bentonita v laboratorijskih pogojih. Izračunane relativne napake med eksperimentalnimi in numeričnimi rezultati so 3% za temperaturo in 7% za napetosti. Podan numerični model napoveduje zadovoljive rezultate glede na rezultate eksperimentalnih meritev. Model lahko uporabimo pri dvodimenzionalnih problemih z različnimi začetnimi in robnimi pogoji, v ta model zlahka vključimo nelinearne parametre zemljine. thermo-hydro-mechanical process unsaturated bentonite finite element numerical modelling expansive clays gline bentonit prenos toplote prenos snovi mehanske lastnosti numerični modeli termo-hidro-mehanski proces nenasičen betonit končni element numerično modeliranje nabrekljive gline true false true Angleški jezik Slovenski jezik Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru Znanstveno delo 2018-06-13 08:33:02 2018-06-13 08:34:08 2022-08-01 19:46:55 2019-07-11 18:18:53 2011 0 0 str. 29-37 št. 1 Letn. 8 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1854-0171 666.322 215987712 262512384 1854-0171 URN:SI:UM:DK:OGPTZ4ZJ Acta_geotechnica_Slovenica_2011_Laredj_et_al._A_coupled_thermo-hydro-mechanical_model_of_expansive_clays_subjected_to_heating_and_hydrat.pdf Acta_geotechnica_Slovenica_2011_Laredj_et_al._A_coupled_thermo-hydro-mechanical_model_of_expansive_clays_subjected_to_heating_and_hydrat.pdf 1 BDBA1C1477D6AE3F27E2564CA2784317 482086665516994cc5a34ef04f24905a1c288ffbcb5dc4db7a2b1635838bb4a9 0510f26d-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/fc82ada3-e65d-4ef0-8b0f-1b961de424f0 https://dk.um.si/Dokument.php?lang=slv&id=125540 http://fgserver3.fg.um.si/journal-ags/2011-1/article-3.asp 1 https://dk.um.si/Dokument.php?lang=slv&id=125541 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Acta geotechnica Slovenica 0 0 0