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Concrete’s behaviour modeling at high temperatures, Influence of mechanical models and study scales



Title: Concrete’s behaviour modeling at high temperatures, Influence of mechanical models and study scales
Author(s): C. De Sa, F. Benboudjema
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 111 - 118
Total Pages: 8
Nb references: 14
Language: English


Abstract: Heating of concrete leads to mechanical properties decrease due to different mechanical damage processes associated to different scales and physical couplings. The work presented deals with comprehension of mechanical modelling on concrete’s response to high temperature so as to be able to predict the previous mechanical processes and properties decrease.
Different thermo-mechanical models are so used and compared to conclude on their efficiency to describe concrete’s response at high temperatures. Simulations at different temperature levels (from 20 to 600°C) are so simulated to see the mechanical properties’ evolutions predicted (which are then compared with experimental results).
Two approaches, at macroscopic and mesoscopic scales, are compared (using homogeneous or bi-phasic meshes). Two mechanicals models for cracking description are also compared at macroscopic scale: an isotropic elastic damage model (IED) and an orthotropic elasto-plastic damage model (OEPD). Influence of thermal transient creep modelling (TTC) is also studied.


Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00