Open AccessA Straightforward Procedure for Deriving the Biaxial Interaction Diagrams of RC Sections in Fire
Author(s) -
Duc Toan Pham,
Hoang Giang Nguyen,
Sabine Boulvard
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1203/3/032057
Subject(s) - yield (engineering) , structural engineering , diagram , section (typography) , finite element method , limit (mathematics) , material properties , interaction overview diagram , materials science , computer science , mathematics , software , engineering , mathematical analysis , composite material , database , unified modeling language , programming language , operating system
Based on the lower bound static approach of the yield design (or limit analysis) theory, this contribution presents a straightforward computational procedure for establishing the biaxial interaction diagrams of RC sections in fire conditions, taking into account the experimentally-based relationships linking the degradation of material strength properties to the temperature increase. In the present approach, material characteristics are introduced in two steps: (i) a preliminary heat transfer analysis for evaluating the temperature distribution on the RC section and (ii) the introduction of reduced factors as functions of temperature into both the concrete and steel strength properties. For illustrative purpose, calculations will be conducted on a typical RC section subjected to different fire exposures. Finally, the theoretical predictions will be compared to those obtained from numerical simulations using a finite element software.