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Pro098

UTILISATION OF LINEAR TRACTION SEPARATION BOND LAW TO IMPROVE THE NUMERICAL SIMULATION OF THE BENDING BEHAVIOUR OF HYBRID TRC-CONCRETE BEAMS



Author(s): Maciej M. Wozniak, Tine Tysmans, John Vantomme, Svetlana Verbruggen and Sven de Sutter
Book Title: FERRO-11 – 11th International Symposium on Ferrocement and 3rd ICTRC - International Conference on Textile Reinforced Concrete
Editor: Wolfgang Brameshuber
Print-ISBN: 978-2-35158-152-0
e-ISBN: 978-2-35158-153-7
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 483-490
Total Pages: 8
Language: English


Abstract: The use of Textile Reinforced Concrete/Cement (TRC) materials in the building industry has recently been widely investigated. Among all of the utilisations of TRC, the most re-searched ones are strengthening and retrofitting of existing concrete structures as well as stay-in-place formwork for new concrete construction. To model the mechanical behaviour in such applications, the bond between TRC and concrete is a crucial parameter. Therefore this paper proposes to numerically model the bond by the linear traction separation law, and investigates the influence of the essential parameters (bond strength, maximum slip, initial stiffness) on the global structural response of a hybrid TRC-concrete structure. Subject of both simulation and physical experiment are concrete beams longitudinally reinforced with TRC and subjected to four-point bending. The initial bond parameters are identified from shear tests performed on small-scale specimens. As comparison between numerical model and experiments shows, the inclusion of the bond behaviour with the linear traction separation law improves the simulation of the mechanical behaviour of the hybrid beams. The results of the numerical simulation prove moreover a great importance of the bond parameters on the overall stiffness of the beams. In the future, it would be interesting to examine if – and up to what level - the non-linear traction-separation (bond-slip) model can improve the simulation even more.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00