Table of Contents
Chinese Journal of Engineering
Volume 2014, Article ID 768956, 20 pages
Research Article

Numerical Evaluations of Functionally Graded RC Slabs

1ISISE, Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
2Faculty of Civil Engineering, Western Michigan University, Kalamazoo, MI 49008-5316, USA
3C-TAC Research Centre, Department of Civil Engineering, University of Minho, 4800-058 Guimarães, Portugal
4Faculty of Civil Engineering, Semnan University, Semnan 35131-19111, Iran

Received 13 February 2014; Revised 12 July 2014; Accepted 13 July 2014; Published 10 September 2014

Academic Editor: Baozhong Sun

Copyright © 2014 M. Mastali et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Nowadays, using fibrous materials is used widely in strengthening applications such as cross-section enlargement and using functionally graded reinforced concrete. Functionally graded reinforced concrete is used as multireinforced concrete layers that can be reinforced by different fiber types. The objective of this research was to address the structural benefits of functionally graded concrete materials by performing analytical simulations. In order to achieve this purpose, in the first stage of this study, three functionally graded reinforced concretes by steel and polypropylene (PP) were experimentally tested under flexural loading. Inverse analysis was applied to obtain the used material properties of reinforced concrete by FEMIX software. After obtaining the material properties, to assess the performance of proposed slabs, some other cases were proposed and numerically evaluated under flexural and shear loading. The results showed that increasing steel fiber in reinforced entire cross section led to achieve better shear and flexural performance while the best performance of reinforced functionally graded slabs was achieved for slab at 1% fiber content. In the second stage, nineteen reinforced functionally graded RC slabs with steel bars were simulated and assessed and some other cases were considered which were not experimentally tested.