FIXED SUPPORTED FIBROUS REINFORCED CONCRETE SLABS

Anwar Abdalla Elamin, El-Niema I. El-Niema

Abstract


The paper presents the results of an experimental work performed at the Khartoum University, Civil Engineering Department Structure lab. Six fixed supported slab specimens with varying parameters such as the reinforcement ratio and steel fibers contents have been investigated. The performance of these specimens is analyzed and compared with the theoretical investigations using yield line methods and a nonlinear finite element method adopted by ANSYS. A good correlation of results is shown clearly. It was found that the steel fibers content has an influence ranging from little to significant on the tested properties. Experimental results proved that the steel fibers reinforced slabs had higher strength, higher first crack and ultimate loads, less deflection, less strain in reinforcements, thinner crack, better crack patterns and better ductility compared with normally reinforced concrete slabs. The accuracy of the finite element models is assessed by comparison with the experimental results, which are in good agreement. The load-deflection curves from the ANSYS agree well with the experimental results in the linear range, but after that the ANSYS results are slightly different.

Keywords


Fibers Reinforced Slab; Isotropic; Orthotropic, Ultimate Load; Finite Element

Full Text:

PDF

References


EI-Niema, E.I., "Fiber Reinforced concrete Beams Under Torsion, "ACI Journal, Title No. 90 –S50, September 1993, pp. 489- 495. [2] EI-Niema, E.I., "Reinforced concrete Beams with steel Fibers Under Shear, "ACI Journal, Title No. 88 -S21, March-April 1991, pp. 178- 183. [3] ACI Committee 544, "Design Considerations for Steel Fiber Reinforced Concrete," 544.4R-88, American Concrete Institute, Dertroit/USA, 1999, PP. 544.4R-1 – 544.4R-18 [4] Buquan Miao; Jenn-Chian Chern; and Chen-An Yang, "Influences of fiber content on properties of self-compacting steel fiber reinforced concrete," Journal of the Chinese of Engineers, Vol. 26, No. 4, 2003, pp. 523-530 [5] British Standard Institution, BS 8110, "Structural use of concrete, Part 1 1997, Code of practice for design and construction". [6] Park, R. and Gamble, W. L., “Reinforced Concrete Slabs”, New York, John Wiley and Sons, 1980. [7] Rudolph Szilard, Dr.-Ing., P.E. "Theories and Applications of Plate Analysis" John Wiley & Sons, INC. Hoboken, New Jersey United States of America, 2004 [8] SAS, ANSYS 7.1, "Finite Element Analysis System," SAS IP, Inc 2003. [9] Soroushian, P. and Lee, C. D., "Constitutive modeling of steel fiber reinforced concrete under direct tension and compression," Int. Conf. on Recent Developments in Fiber Reinforced Cement Concrete, Cardiff (UK), 1989, pp.363-377. [10] S. A. Al-Ta'an and N. S. Al-Saffar, "Nonlinear finite element analysis of fibrous reinforced concrete beam-column joints," Al-Rafidain Engineering, Vol.16, No.5, Dec. 2008, pp.57-69

Hognestad, E, Hanson, N. W. and McHenry, D., "Concrete stress distribution in ultimate strength design," ACI Journal, Proceedings, Vol 52, No. 4, December 1955, pp. 455-480 [12] Kachlakev, D.I., Miller, T., Yim, S., Chansawat, K. and Potisuk, T., "Finite element modeling of reinforced concrete structures strengthened with FRP laminates," California Polytechnic State University, San Luis Obispo, CA and Oregon State University, Corvallis, OR for Oregon Department of Transportation, May 2001.


Refbacks

  • There are currently no refbacks.


Sudan Eng. Society Journals