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Design charts for steel fibre reinforced concrete elevated slabs



Author(s): D. Nakov
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 1482 - 1494
Total Pages: 12
Language: English


Abstract: 
A subject of this paper is to provide charts for easier design of steel fibre reinforced concrete elevated slabs. Determination of the bearing capacity of the slabs was made by using the Yield line theory. Different materials as well as different geometry were considered, making in total four hundred and five (405) combinations. All these combinations were a subject of design by the Yield line theory at the ultimate limit state and design charts with respect of some of the variables have been developed. It is a well-founded method to calculate either the load at which an element will fail or the moments in an element at the point of failure. The theory is based on the principle that the internal work, Wint, done in the yield lines (or in the axis of rotation) rotating, should be equal to the external work, Wext, done by the moving of the external load (Wint = Wext). An easy way to imagine yield lines is to figure out, where a slab would collapse or fail. When a slab is loaded to failure, yield lines form in the most highly stressed areas and these develop into plastic hinges which develop into a collapse mechanism, so called yield line pattern. After carrying out the parameter study for the influencing variables, all different yield line patterns have been found following the kinematics principles and the equilibrium equations. At the end, finite element analysis was performed for one case with the program Abaqus using the Concrete Damaged Plasticity Material Model for implementation of the SFRC material. At the end, a comparison between the ultimate load from the analytical and the load-deflection relationship from the numerical solution is presented.


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00