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Sprijemnost med betonom in armaturo : diplomska naloga
Dežman, Andraž (Author), Saje, Drago (Mentor) More about this mentor... This link opens in a new window, Logar, Janko (Thesis defence commission member)

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Abstract
V diplomski nalogi obravnavam sprijemnost med jekleno armaturno palico premera 12 mm in različnimi vrstami betonov. Standard Evrokod 2 in modelni predpis FIB Model Code 2010 določata mejno sprijemno napetost, ki je modelirana kot strižna napetost po obodu palice. Standarda v povezavi s to tematiko ne obravnavata vlaknastih betonov. Skopo je tudi področje betonov visoke trdnosti. V ta namen smo izvedli raziskavo z izvlečnim oziroma »pull-out« testom. Pri delu smo se opirali na standard SIST EN 10080:2005, ki opredeljuje potek raziskave kot tudi obliko preizkušancev. Med izvlečnim testom se palico, ki je vgrajena v betonsko kocko, izvleče iz betonskega objema. V raziskavi smo preizkusili beton normalne trdnosti, beton visoke trdnosti in visoko trden vlaknast beton z 1 % jeklenih vlaken glede na prostornino betona. Za vsako vrsto betona smo izdelali tri preizkušance. Rezultati so pokazali, da se preizkušanci iz betona visoke trdnosti obnašajo podobno kot preizkušanci iz običajnega betona, vendar pri tem dosegajo trikrat boljšo sprijemnost.

Language:Slovenian
Keywords:gradbeništvo, diplomska dela, sprijemna napetost, izvlečni test, beton visoke trdnosti, vlaknast beton, Evrokod, FIB Model Code 2010
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2015
Publisher:[A. Dežman]
Number of pages:X, 36 str.
Place:Ljubljana
COBISS.SI-ID:7254625 Link is opened in a new window
Views:1943
Downloads:531
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Secondary language

Language:English
Title:Bond between concrete and reinforcing steel
Abstract:
This thesis researches bond characteristics between the 12mm steel reinforcing bar and various types of concrete. Standard Eurocode 2 and FIB Model Code 2010 define ultimate bond stress, which acts like shear stress around the reinforcing bar. In correlation with bond, high strength concrete is poorly represented, furthermore, research and information on fibre concrete are lacking. Therefore, a series of pull-out tests, based on standard SIST EN 10080:2005, have been conducted. In this study, behaviours of normal strength concrete, high-strength concrete and high-strength steel fibre-reinforced concrete with 1 % of steel fibres have been tested. Three pull-out tests were carried out for each type of concrete. The results show that high-strength concrete acts in similar way as normal strength concrete. However, its ultimate bond stress was three times larger.

Keywords:civil engineering, graduation thesis, bond stress, pull-out test, high strength concrete, tefibre concrete, Eurocode, FIB Model Code 2010

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