"1200"^^ . . "Time effect interactions in computer models of concrete structures"@en . . . . "3"^^ . . "0"^^ . . "3"^^ . "1200"^^ . "2007-12-31+01:00"^^ . . . . "Interakce \u010Dasov\u00FDch vliv\u016F ve v\u00FDpo\u010Dtov\u00FDch modelech betonov\u00FDch konstrukc\u00ED"@cs . . "0"^^ . "The long time effects in computational models of concrete structures are in the current practise considered separately without interaction. In this practise the creep and shrinkage are based on average values of environmental parameters of temperature and humidity. The time variation of these parameters found from a transport analysis of humidity are usually not taken into account. The reason for this simplification is mainly complexity and unavailability of appropriate computational methods, which could make possible a simultaneous analysis of all these effects. The goal of this project is to propose computational models for interaction of time effects in creep analysis of concrete structure. The proposed models will include the analysis of time processes of humidity transport, volume changes due to shrinkage and temperature and creep. The effect of these actions on stress and damage state of concrete structures will be performed by the non-linear material models based on fracture mechanics and"@en . . "2005-01-01+01:00"^^ . "Ve st\u00E1vaj\u00EDc\u00EDch modelech v\u00FDpo\u010Dtu dlouhodob\u00FDch \u00FA\u010Dink\u016F na napjatost betonov\u00FDch konstrukc\u00ED se jednotliv\u00E9 jevy uva\u017Euj\u00ED zpravidla odd\u011Blen\u011B. P\u0159i tom se dotvarov\u00E1n\u00ED a smr\u0161\u0165ov\u00E1n\u00ED odvozuje z pr\u016Fm\u011Brn\u00FDch hodnot vliv\u016F prost\u0159ed\u00ED, jako jsou teplota a vlhkost. Obvykle se neuva\u017Euj\u00ED \u010Dasov\u00E9 vlivy zm\u011Bny t\u011Bchto parametr\u016F na z\u00E1klad\u011B anal\u00FDzy transportu vlhkosti v betonu. D\u016Fvodem pro tato zjednodu\u0161en\u00ED je zejm\u00E9na nedostupnost efektivn\u00EDch v\u00FDpo\u010Detn\u00EDch metod umo\u017E\u0148uj\u00EDc\u00EDch sou\u010Dasn\u00E9 uv\u00E1\u017Een\u00ED t\u011Bchto vliv\u016F. C\u00EDlem tohoto projektu je n\u00E1vrh a ov\u011B\u0159en\u00ED takov\u00FDch v\u00FDpo\u010Detn\u00EDch model\u016F, kter\u00E9 budou interakci \u010Dasov\u00FDch vliv\u016F umo\u017E\u0148ovat. V\u00FDpo\u010Detn\u00ED modely budou zahrnovat anal\u00FDzu \u010Dasov\u00FDch vliv\u016F transportu vlhkosti, objemov\u00FDch zm\u011Bn a dotvarov\u00E1n\u00ED. \u00DA\u010Dinky t\u011Bchto vliv\u016F na napjatost betonov\u00FDch konstrukc\u00ED bude \u0159e\u0161ena pomoc\u00ED neline\u00E1rn\u00EDch materi\u00E1lov\u00FDch model\u016F s vyu\u017Eit\u00EDm lomov\u00E9 mechaniky a plasticity. \u0158e\u0161en\u00ED bude prov\u00E1d\u011Bno numerick\u00FDmi metodami na b\u00E1zi metody kone\u010Dn\u00FDch prvk\u016F a praktick\u00E1 implementace metod a algoritm\u016F bude realizov\u00E1na pomoc\u00ED"@cs . . "1"^^ . "computer simulations; concrete structures; creep"@en .