3734 KB46 KB195120262021Bratina, SebastjanHozjan, Tomažštevilka:letn. 70str. 70-83ISSN:0017-2774COBISSID_HOST:61540611URN:URN:NBN:SI:doc-WWT8UYMWslZveza društev gradbenih inženirjev in tehnikov SlovenijeGradbeni vestnikadvanced methodbetonska konstrukcijaconcrete constructionfire resistanceHEATKO and NFIRA softwarenapredna metodapožarna odpornostprograma HEATKO in NFIRArailway bridge over Glinščicaželezniški most čez GlinščicoOcena požarne odpornosti železniškega mostu čez Glinščico v sklopu izgradnje drugega tira Divača-Koper s pomočjo napredne računske metode| Estimation of fire resistance of the railway bridge over Glinščica as part of the construction of the second track Divača-Koper using an advanced calculation method|The paper presents an advanced calculation method for estimating the fire resistance of concrete structures. According to the Eurocode, the following relevant steps of structural fire design analysis should be considered: (i) selection of the relevant design fire scenarios and determination of the corresponding design fires, (ii) calculation of the temperature evolution in the structural members, and (iii) calculation of the mechanical behaviour of the structure exposed to fire. The application of the advanced calculation method is presented on the example of the fire resistance assessment of the railway bridge over Glinščica, which was carried out in cooperation with the design office KO-BIRO, Ltd. The railway bridge is designed as a prestressed concrete structure. For the second and third steps of the structural fire design analysis, self-developed mathematical models and the related computer software HEATKO and NFIRA were used. The mentioned software was developed within the research projects at the Faculty of Civil Engineering and Geodesy, University of LjubljanaV članku predstavimo napredno računsko metodo za oceno požarne odpornosti betonskih konstrukcij. Metoda, skladna z Evrokodi, vključuje naslednje relevantne korake projektne požarne analize: (i) izbiro za projektiranje merodajnih požarnih scenarijev in določitev ustreznih projektnih potekov požarov, (ii) izračun razvoja temperaturnega polja konstrukcijskih elementov in (iii) izračun mehanskega obnašanja konstrukcije, izpostavljene požaru. Uporabo napredne računske metode prikažemo na primeru ocene požarne odpornosti železniškega mostu čez Glinščico, ki smo jo izdelali za projektanta KO-BIRO, d. o. o. Most bo izveden kot prednapeta betonska konstrukcija. Za drugi in tretji korak projektne analize uporabimo lasten matematični model in pripadajoča računalniška programa HEATKO in NFIRA, ki sta bila razvita v okviru raziskovalnih projektov na Fakulteti za gradbeništvo in geodezijo Univerze v LjubljaniTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza društev gradbenih inženirjev in tehnikov Slovenije