On the effect of different Eurocode 2-based modelling choices on the calculated fire resistance of RC columns

Rogulj, Marko (author), Harapin, Alen (author), Češarek, Peter (author), Češarek Kolšek, Jerneja (author)

This paper examines the impact of different modelling choices on the fire performance of RC columns using Eurocode 2 in a real-world case study. The methodology includes a comparative analysis of simplified and advanced numerical simulations, employing FDS for fire curves and ABAQUS for thermal and mechanical analyses. Results show how modelling assumptions affect load-bearing capacity and fire resistance. Conclusions emphasise balancing safety and efficiency, highlighting the importance of variable axial loads and multiple heat zones for accurate fire resistance assessment

• Language: English
• Keywords: fire analysis, RC column, simplified procedures, advanced procedures, natural fires, EC2
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 567-582
• Numbering: Vol. 77, br. 6, art. 4118
• PID: 20.500.12556/RUL-173541
• UDC: 699.814:666.982
• ISSN on article: 1333-9095
• DOI: 10.14256/JCE.4118.2024
• COBISS.SI-ID: 249400579
• Publication date in RUL: 18.09.2025

Record is a part of a journal

• Title: Građevinar
• Publisher: Hrvatski savez građevinskih inženjera
• ISSN: 1333-9095
• COBISS.SI-ID: 7397729

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Croatian

Abstract

Ovaj rad istražuje utjecaj različitih modelskih pristupa na otpornost armiranobetonskih stupova na požar prema Eurokodu 2, primjenjujući ih na stvarnome primjeru iz prakse. Metodologija uključuje usporednu analizu pojednostavljenih i naprednih numeričkih simulacija, pri čemu se računalni program FDS (engl. Fire Dynamics Simulator) koristi za određivanje požarnih krivulja, a računalni program ABAQUS za toplinske i mehaničke analize. Rezultati pokazuju kako pretpostavke u modeliranju utječu na nosivost i otpornost na požar. Zaključci ističu potrebu za ravnotežom između sigurnosti i učinkovitosti te važnost varijabilnih osnih opterećenja i više toplinskih zona za točnu procjenu otpornosti na požar.

• Keywords: požarna analiza, armiranobetonski stup, pojednostavljene metode, napredne metode, prirodni požari, EC2, požarna analiza, armiranobetonski steber, pojednostavljene metode, napredne metode, prirodni požari, EC2