Razpokanost natezno obremenjenega armiranobetonskega elementa : diplomska naloga

Cerar, Benjamin (author), Saje, Drago (mentor), Bratina, Sebastjan (comentor)

V diplomski nalogi smo obravnavali pojav in širjenje razpok armiranobetonskih elementov, ki nastanejo kot posledica centričnih nateznih obremenitev. V sklopu raziskovalnega dela smo pripravili več preizkušancev z različnimi načini vodenja in prekrivanja vzdolžne armature. Poleg betonov običajnih trdnosti smo uporabili tudi beton, v katerega smo dodali jeklena vlakna. Preizkušance smo natezno obremenili do nastopa porušitve. Na podlagi izsledkov opravljenih raziskav smo ugotovili, da nekateri načini preklapljanja armature niso ustrezni. Opazili smo ugoden učinek dodatne mikroarmature pri nateznem obremenjevanju preizkušancev. S pomočjo določil standarda smo izračunali širino karakteristične razpoke natezno obremenjenih preizkušancev in računske vrednosti primerjali z izmerjenimi širinami razpok. Primerjava je pokazala, da lahko z določili standarda dobro ocenimo povprečno širino razpoke, ki nastane pri nateznem obremenjevanju armiranobetonskih elementov.

• Language: Slovenian
• Keywords: razpokanje, natezno obremenjevanje, vlaknast beton
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: [B. Cerar]
• Year: 2017
• PID: 20.500.12556/RUL-96483
• UDC: 624.012.45:624.04:624.07(043.2)
• COBISS.SI-ID: 8173921
• Publication date in RUL: 02.10.2017

CERAR, Benjamin, 2017, Razpokanost natezno obremenjenega armiranobetonskega elementa : diplomska naloga [online]. Bachelor’s thesis. B. Cerar. [Accessed 4 June 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=96483

Secondary language

• Language: English
• Title: Cracking of tensioned reinforced concrete element : Graduation thesis

Abstract

Cracking of reinforced-concrete elements as a result of tensile loading is considered in this thesis. In the course of the research segment of the thesis, several concrete specimens with different methods of rebar splicing were prepared. Specimens of steel fiber-reinforced concrete were also prepared for the purpose of this assignment, and the prepared specimens were then tested under pure tension until failure. The second part of the thesis analyses the results of laboratory test. Using the findings of the research for this thesis, we concluded that some methods of rebar lap splicing are less suitable for practical use in concrete structures than others. Moreover, concrete samples, supplemented with steel fibers appeared to inhibit a better tensile response, compared to the reinforced concrete specimens without steel fibers. In the last part, the average crack width of the reinforced concrete elements according to the provisions of the Eurocode standard was calculated, and compared to the actual width of cracks. Calculating the crack width using the Eurocode standard appeared to give a good estimation of the actual sizes of cracks that appear as a result of tensile loading.

• Keywords: cracking, tensile stress, fiber-reinforced concrete