"Stanoven\u00ED charakteristick\u00E9 pevnosti konstrukc\u00ED z betonu na z\u00E1klad\u011B zkou\u0161ek" . . . . . "Stavebnictv\u00ED" . "P(2A-1TP1/139), P(GA103/09/0693)" . "Assessment of Characteristic Concrete Strength from Tests"@en . . "343428" . . . . "CZ - \u010Cesk\u00E1 republika" . "RIV/68407700:21610/09:07154463" . "statistical evaluation; concrete strength; characteristic value"@en . "Stanoven\u00ED charakteristick\u00E9 pevnosti konstrukc\u00ED z betonu na z\u00E1klad\u011B zkou\u0161ek" . . "Statistical procedures for estimating concrete strength from small samples provided in the new European document EN 13791 are different from those accepted in the material independent Eurocode EN 1990. Differences between these two approaches are not negligible and appear to be important particularly for assessment of existing structures. The characteristic values (5% fractiles) of concrete strength determined in accordance with EN 13791 are systematically greater than values obtained using the EN 1990 procedure. The differences increase up to 8 MPa with decreasing number of tests. Moreover, according to EN 13791 the variation of the characteristic strength with a number of tests results is discontinuous. Thus, it is desirable to harmonize the procedures given in EN 13791 for determining compressive concrete strength with those provided for any material in EN 1990. It is also shown that estimates of the characteristic strength may be improved using prior information."@en . "4"^^ . . . . "1802-2030" . "Vyu\u017Eit\u00ED zkou\u0161ek je d\u016Fle\u017Eitou sou\u010D\u00E1st\u00ED ov\u011B\u0159ov\u00E1n\u00ED spolehlivosti existuj\u00EDc\u00EDch \u017Eelezobetonov\u00FDch konstrukc\u00ED, u kter\u00FDch jsou nejistoty o vlastnostech materi\u00E1l\u016F \u010Dasto velmi v\u00FDznamn\u00E9. Statistick\u00E9 metody se uplatn\u00ED p\u0159edev\u0161\u00EDm p\u0159i odhadu charakteristick\u00E9 hodnoty pevnosti betonu, v n\u011Bkter\u00FDch p\u0159\u00EDpadech se mohou pou\u017E\u00EDt tak\u00E9 p\u0159i p\u0159\u00EDm\u00E9m odhadu n\u00E1vrhov\u00E9 hodnoty. Obecn\u00E9 postupy hodnocen\u00ED a navrhov\u00E1n\u00ED konstrukc\u00ED z libovoln\u00E9ho materi\u00E1lu na z\u00E1klad\u011B zkou\u0161ek uv\u00E1d\u00ED p\u0159\u00EDloha D normy \u010CSN EN 1990. Postupy pro stanoven\u00ED charakteristick\u00E9 hodnoty pevnosti betonu v konstrukc\u00EDch na z\u00E1klad\u011B zkou\u0161ek uv\u00E1d\u00ED nov\u00FD evropsk\u00FD dokument EN 13791. Postupy podle \u010CSN EN 1990 a EN 13791 se v\u0161ak navz\u00E1jem li\u0161\u00ED a mohou v\u00E9st k rozd\u00EDln\u00FDm odhad\u016Fm charakteristick\u00E9 hodnoty. Ukazuje se, \u017Ee empirick\u00E9 vztahy uveden\u00E9 v nov\u00E9m p\u0159edpisu EN 13791 vedou zpravidla k vy\u0161\u0161\u00EDm hodnot\u00E1m charakteristick\u00E9 pevnosti a jsou tedy na nebezpe\u010Dn\u00E9 stran\u011B." . "Stanoven\u00ED charakteristick\u00E9 pevnosti konstrukc\u00ED z betonu na z\u00E1klad\u011B zkou\u0161ek"@cs . "Assessment of Characteristic Concrete Strength from Tests"@en . "3"^^ . "[EBB52849E876]" . "3" . . . . . "Stanoven\u00ED charakteristick\u00E9 pevnosti konstrukc\u00ED z betonu na z\u00E1klad\u011B zkou\u0161ek"@cs . "Vyu\u017Eit\u00ED zkou\u0161ek je d\u016Fle\u017Eitou sou\u010D\u00E1st\u00ED ov\u011B\u0159ov\u00E1n\u00ED spolehlivosti existuj\u00EDc\u00EDch \u017Eelezobetonov\u00FDch konstrukc\u00ED, u kter\u00FDch jsou nejistoty o vlastnostech materi\u00E1l\u016F \u010Dasto velmi v\u00FDznamn\u00E9. Statistick\u00E9 metody se uplatn\u00ED p\u0159edev\u0161\u00EDm p\u0159i odhadu charakteristick\u00E9 hodnoty pevnosti betonu, v n\u011Bkter\u00FDch p\u0159\u00EDpadech se mohou pou\u017E\u00EDt tak\u00E9 p\u0159i p\u0159\u00EDm\u00E9m odhadu n\u00E1vrhov\u00E9 hodnoty. Obecn\u00E9 postupy hodnocen\u00ED a navrhov\u00E1n\u00ED konstrukc\u00ED z libovoln\u00E9ho materi\u00E1lu na z\u00E1klad\u011B zkou\u0161ek uv\u00E1d\u00ED p\u0159\u00EDloha D normy \u010CSN EN 1990. Postupy pro stanoven\u00ED charakteristick\u00E9 hodnoty pevnosti betonu v konstrukc\u00EDch na z\u00E1klad\u011B zkou\u0161ek uv\u00E1d\u00ED nov\u00FD evropsk\u00FD dokument EN 13791. Postupy podle \u010CSN EN 1990 a EN 13791 se v\u0161ak navz\u00E1jem li\u0161\u00ED a mohou v\u00E9st k rozd\u00EDln\u00FDm odhad\u016Fm charakteristick\u00E9 hodnoty. Ukazuje se, \u017Ee empirick\u00E9 vztahy uveden\u00E9 v nov\u00E9m p\u0159edpisu EN 13791 vedou zpravidla k vy\u0161\u0161\u00EDm hodnot\u00E1m charakteristick\u00E9 pevnosti a jsou tedy na nebezpe\u010Dn\u00E9 stran\u011B."@cs . "Jung, Karel" . "S\u00FDkora, Miroslav" . "RIV/68407700:21610/09:07154463!RIV09-MPO-21610___" . "Holick\u00FD, Milan" . . "3" . . "3"^^ . "21610" .