Dimenzioniranje armiranobetonskega konstrukcijskega elementa : diplomska naloga

Pungerčar, Domen (author), Brank, Boštjan (mentor), Isaković, Tatjana (comentor)

V diplomski nalogi analiziramo in projektiramo nosilec, ki je del strešne konstrukcije. Za izbrani element izvedemo dva različna sistema in sicer nosilec z mehko armaturo ter prednapeti nosilec. Konstrukcijski element je dolžine 24.7 metra s spremenljivo višino, ki znaša ob podporah 1.25 metra ter na sredini 1.55 metra. Projektiranje izvajamo skladno s zahtevami standarda DIN EN 1992-1-1:2010. V prvem delu analiziramo obtežbo in obtežne kombinacije za oba sistema. Za kombinacije, ki jih v nalogi potrebujemo pri računanju, so izvedeni in grafično prikazani statični izračuni. Kontrole za mejno stanje nosilnosti ter mejno stanje uporabnosti smo izvedli za oba sistema. Za oba sistema določimo potrebno strižno ter vzdolžno armaturo. Zaradi nesimetričnosti prečnega prereza dodatno izvedemo kontrolo torzijske obremenitve. Za prednapeti nosilec smo potrebno dodatno armaturo izvrednotili še za transport ter vgradnjo. Za prednapeti nosilec je določena potrebna napenjalna sila ter izgube. Izvedene so kontrole vertikalnih pomikov za oba sistema na nerazpokanem in razpokanem prerezu. Pri prednapetem nosilcu so zajeti pozitivni učinki na pomike zaradi prednapetja. Na koncu naloge so prikazani armaturni načrti.

• Language: Slovenian
• Keywords: gradbeništvo, diplomska naloga, UNI, prednapetje, armiran nosilec, analiza obtežbe, nosilnost, vertikalni pomiki, Evrokodi
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [D. Pungerčar]
• Year: 2016
• Number of pages: XII, 107 str.
• PID: 20.500.12556/RUL-84876
• UDC: 624.012.45:624.072.2(043.2)
• COBISS.SI-ID: 7641441
• Publication date in RUL: 10.10.2016

PUNGERČAR, Domen, 2016, Dimenzioniranje armiranobetonskega konstrukcijskega elementa : diplomska naloga [online]. Bachelor’s thesis. Ljubljana : D. Pungerčar. [Accessed 30 March 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=84876

Secondary language

• Language: English
• Title: Design of reinforced concrete structural element

Abstract

In the thesis, we analyse and design a beam which is part of a roof structural system. For the chosen element, we analyse two variations, first one for reinforced concrete and the second one for prestressed concrete element. The beam is 24.7 m in length and its height varies from 1.25 meter at the bearings to 1.5 m in the middle. The calculations were made accordingly to the requirements of Eurocode DIN EN 1992-1-1:2010. In the first part of the thesis load, load combinations and structural analysis was made. We used the results to dimension and prove all of the requirements for serviceability and ultimate limit state. Reinforcement was designed for both beams for their shear and bending resistance. Control for torsion carrying capacity was made due to their unsymmetrical cross section. For the prestressed beam the rebar was designed for the states of transport and mounting. Necessary tension forces in the cables were calculated for the prestressed beam. Loses of its tension were determined. Vertical displacements of the beams were checked for uncracked and cracked cross sections. Positive effects of prestressing were also included. Reinforcement drawings are shown at the end of the thesis.

• Keywords: graduation thesis, prestressing, reinforced concrete beam, load analysis, loadbearing capacity, vertical strain