Inverse Analysis tailored for both strain hardening and strain softening UHPFRC

Author(s) : S. Dobrusky
Paper category : Proceedings
Book title : UHPFRC 2017 Designing and Building with UHPFRC: New large-scale implementations, recent technical advances, experience and standards
Editor(s) : F. Toutlemonde & J. ResplendinoT.Ch.
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 211 - 220
Total Pages : 10
Language : English

Abstract: In this article, a computational time-efficient model predicting bending behavior which surpasses simplified models and gives the results with the similar accuracy as the fiber-beam models is presented. The time efficiency is due to the fact that the proposed model works in the moment-curvature space directly, thus avoiding the computational costs related to section integration which has to be performed with the fiber-beam models. The model is based on a modified force-based fiber-beam formulation where progressive loading is driven by a curvature at its non-linear hinge. The curvature outside of the nonlinear hinge decreases during a deflection-softening phase and therefore a damaged constitutive law should be introduced. Rather than using the classical damage model proposed by Mazars, a macroscopic damage model at the moment-curvature level is proposed. The moment-curvature damage model reduces the whole computation of the beam equilibrium to only one numerical loop. Hypotheses of the new model such as damage modeling, localization, and shear deflection are briefly discussed and the model’s practical applications are presented to show the benefits.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00