diplomska naloga
David Kokalj (Author), Sebastjan Bratina (Mentor), Tomo Cerovšek (Thesis defence commission member), Maruška Šubic Kovač (Thesis defence commission member)

Abstract

Poenostavljene računske metode požarnovarnega projektiranja AB nosilcev

Keywords

gradbeništvo;VSŠ-OG;diplomska dela;požarna odpornost;poenostavljene računske metode;AB nosilec;temperatura;

Data

Language: Slovenian
Year of publishing:
Source: Ljubljana
Typology: 2.11 - Undergraduate Thesis
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: [D. Kokalj]
UDC: 51-3:614.841.45(043.2)
COBISS: 5683553 Link will open in a new window
Views: 1795
Downloads: 410
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Simplified calculation methods for the fire design of RC beams
Secondary abstract: This thesis presents simplified calculation methods for evaluating the fire resistance of reinforced concrete (RC) beams in accordance with the SIST EN 1992-1-2:2005 standard. The methods presented are the 500°C isotherm method and the zone method. With both methods, the fire analysis is divided into two mathematically separate steps: thermal and mechanical. Thermal analysis is used to predict temperature development in the beam, taking into consideration the relevant heat source and temperature-dependent thermal and mechanical properties of materials. This step of the analysis is the same for both simplified methods. In the second part of the fire analysis, the axial and bending resistance of the characteristic cross section of the RC beam is determined, taking account of the reduced cross section and the strength reduction of reinforcing bars. The 500°C isotherm method determines the reduced dimensions of cross sections, based on the 500°C isotherm. Using the zone method, the size of the affected area is calculated by dividing the cross section into several zones, for which the temperature conditions are evaluated. The zone method is more accurate than the 500°C isotherm method. In the calculation example, the fire resistance of the simply supported RC beam located over the living space in a single-family house is evaluated using the two methods. It is established that the fire resistance results acquired by both methods differ only marginally.
Secondary keywords: graduation thesis;fire resistance;simplifield calculation methods;RC beam;temperature;
File type: application/pdf
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages: XV, 54 str.
Type (ePrints): thesis
Title (ePrints): Simplified calculation methods for the fire design of RC bears
Keywords (ePrints): požarna odpornost;poenostavljene računske metode;AB nosilec;temperatura
Keywords (ePrints, secondary language): fire resistance;simplified calculation methods;RC beam;temperature
Abstract (ePrints): V diplomski nalogi predstavimo poenostavljeni računski metodi za oceno poţarne odpornosti armiranobetonskih (AB) nosilcev skladno s standardom SIST EN 1992-1-2:2005. To sta metoda izoterme 500°C in metoda območij. Pri obeh metodah je poţarna analiza razdeljena v dva matematično nepovezana dela, na temperaturni del in mehanski del. S temperaturno analizo določimo razvoj temperature v nosilcu glede na merodajni toplotni vpliv in ob upoštevanju temperaturno odvisnih toplotnih in mehanskih lastnosti materialov. Ta del analize je enak pri obeh poenostavljenih metodah. V drugem delu poţarne analize ob upoštevanju zmanjšanega prečnega prereza in reduciranih trdnosti armaturnih palic določimo osno-upogibno odpornost karakterističnega prečnega prereza AB nosilca. Pri metodi izoterme 500°C reducirane dimenzije prereza določimo na podlagi poteka izoterme 500°C. Pri metodi območij širino poškodovanega območja izračunamo s pomočjo razdelitve prečnega prereza na več območij, za katere ocenimo temperaturne pogoje. Metoda območij je natančnejša od metode izoterme 500°C. V računskem primeru s predstavljenima metodama ocenimo poţarno odpornost prostoleţečega AB nosilca, ki se nahaja nad dnevno bivalnim prostorom v enodruţinski stanovanjski hiši. Ugotovimo, da se poţarni odpornosti po obeh metodah minimalno razlikujeta.
Abstract (ePrints, secondary language): This thesis presents simplified calculation methods for evaluating the fire resistance of reinforced concrete (RC) beams in accordance with the SIST EN 1992-1-2:2005 standard. The methods presented are the 500°C isotherm method and the zone method. With both methods, the fire analysis is divided into two mathematically separate steps: thermal and mechanical. Thermal analysis is used to predict temperature development in the beam, taking into consideration the relevant heat source and temperature-dependent thermal and mechanical properties of materials. This step of the analysis is the same for both simplified methods. In the second part of the fire analysis, the axial and bending resistance of the characteristic cross section of the RC beam is determined, taking account of the reduced cross section and the strength reduction of reinforcing bars. The 500°C isotherm method determines the reduced dimensions of cross sections, based on the 500°C isotherm. Using the zone method, the size of the affected area is calculated by dividing the cross section into several zones, for which the temperature conditions are evaluated. The zone method is more accurate than the 500°C isotherm method. In the calculation example, the fire resistance of the simply supported RC beam located over the living space in a single-family house is evaluated using the two methods. It is established that the fire resistance results acquired by both methods differ only marginally.
Keywords (ePrints, secondary language): fire resistance;simplified calculation methods;RC beam;temperature
ID: 8311998