A Nonlinear Finite Element Modeling For High Strength Fibrous Reinforced Concrete Beams

Jaza Hassan Muhammad - M. Rauof Abdulqader [Department of Civil Engineering – College of Engineering - University of Sulaimani]

Received : 16/06/2016

Accepted : 09/10/2016

DOI Link:



This paper presents a nonlinear finite element model to investigate the influence of steel fibers on the flexural strength of high strength reinforced concrete beams. Two methods had been used to model the steel fiber using ANSYS 14. In the first model the effect of steel fiber on the mechanical properties of concrete has been neglected, and the steel fiber considered as smeared reinforcement. In the second model the effect of steel fiber on the mechanical properties of concrete is considered in material modeling. The theoretical results were compared with the experimental result. And the variable present in both models was fiber volume fraction (0.00, 0.75, and 1.5) %. The experimental beams consist of high strength steel fiber reinforced concrete rectangular beams with sectional dimension ( 150 x 100 ) mm and overall length (3000) mm simply supported, and loaded through two points loading, those beams are used for verification of the proposed models. Results showed that the first model is more reliable and compatible with experimental results than the second model. The analytical models also showed that increase in volume fraction of steel fiber improves the flexural rigidity and flexural strength of the high-strength fiber reinforced concrete beams.


KEYWORDS: high strength concrete, reinforced concrete beams, ANSYS 14, steel fiber, deflection


1- Balamuralikrishnan, R., and Antony Jeyasehar, C. “Flexural Behavior of RC Beams Strengthened with Carbon Fiber Reinforced Polymer (CFRP) Fabrics”; The Open Civil Engineering Journal, Vol.3, pp.102- 109. 2009.

2- Musmar, M. A., Rjoub, M. I., and Abdel Hadi, M. A. “Nonlinear Finite Element Analysis of Shallow Reinforced Concrete Beams using SOLID65 Element”; ARPN Journal of Engineering and Applied Sciences; Vol.9, No.2, pp. 85-89. 2014.

3- Alfeehan, A.A., “Strengthening Of R.C. Beams By External Steel Plate Using Mechanical Connection Technique”; Journal of Engineering and Development; Vol.18, No.2, pp. 202-212, 2014.

4- Abbas, A.L., “Non –Linear Analysis of Reinforced Concrete Beams strengthened with Steel and CFRP Plates”; First Engineering Scientific Conference, College of Engineering –University of Diyala, pp. 249-256. December 2010.

5- Mahjoub, R., Hashemi, S., H.. “Finite Element Analysis of RC Beams Strengthened with FRP Sheets under Bending”;Australian Journal of Basic and Applied Sciences,Vol.4, No.5, pp. 773-778.2010.

6- More, R., U., Kulkarni, D., B., “Flextural behavioral study on RC beam with externally bonded Aramid Fiber reinforced Polymer”; International Journal of Research in Engineering and Technology, Vol.3,No.7, pp. 316-321.2014.

7- Tobeia, S. B., “Behavior of Corbels Strengthened with Carbon Fiber Reinforced Polymers (CFRP) – Numerical Study”; Eng. & Tech Journal; Vol.32, PartA, NO.10, 2014.

8- ANSYS, Inc., "ANSYS Mechanical APDL Theory Reference", Release 14.5, 2013

9- ACI Committee 318. Building Code Requirements for Reinforced Concrete, ACI 318-14, American Concrete Institute, Detroit, 315 p. 2014.

10- Kachlakev D.I, Miller T., Yim S., Chansawat K and Potisuk T., "Finite element modeling of reinforced concrete structures strengthened with FRP laminates”, Technical Report, Oregon Department of Transportation, pp.99, May 2001.

11- Gere, I.M. and Timoshenko, S.P., “Mechanics of material”, PWS Publishing Company, Boston, Massachusetts.1997.

12- Cervenka, V., Eligehausen, R. and Pulkl, R., “Sbeta-Computer Program for Nonlinear Finite Element Analysis of Reinforced Concrete Structures”, Report 90/1, Institute of Building Materials, University of Stultgort, 1990.

13- Al-Hassani, H. M., Al-Ta'an, S. A., and Mohammed, A. A., “Behavior of Damaged Reinforced Concrete Beams Strengthened with Externally Bonded Steel Plate”; Tikrit Journal of Engineering Sciences, Vol.20, No.2, pp.48-59. 2013.