Investigating the Capacity of Ultimate Torsion of Concrete Prismatic Beams with Transverse Spiral Bars

Authors: Hadi Barghlame, M. A. Lotfollahi-Yaghin

Abstract:

In this paper, the torsion capacity of ultimate point on rectangular beams with spiral reinforcements in the torsion direction and its anti-direction are investigated. Therefore, models of above-mentioned beams have been numerically analyzed under various loads using ANSYS software. It was observed that, spirallyreinforced prismatic beam and beam with spiral links, show lower torsion capacity than beam with normal links also in anti-direction. The result is that the concrete regulations are violated in this case.

Keywords: RC beam, ultimate torsion, finite element, prismatic beams, spirally tie.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077377

References:

[1] Ameli M, Ronagh H.R., "Treatment of torsion of reinforced concrete beams in current structural standards", Asian Journal of Civil engineering (Building and Housing) 2007, V. 8, No. 5, pp. 507-519.
[2] Wang, W, Thomas H., " Limit Analysis of Reinforced Concrete Beams Subjected To Pure Torsion", Journal of Structural Engineering, January 1997, pp. 86-94.
[3] Collins M.P, Mitchell D., " Shear and torsion design of pre-stressed and non-pre-stressed concrete beams", PCI Journal 1980, No. 4 ,pp. 32-100.
[4] Hsu TTC, Mo YL.,"Softening of concrete in torsion members -Theory and tests", ACI Journal Proceedings 1985 ,82(3) ,pp. 290-300.
[5] Hsu TTC.,"Unified theory of reinforced concrete", Boca Raton (Fl): CRC, 1993.
[6] Csikos A., Hegedus I., "Torsion of Reinforced Concrete Beams", Technical University of Budapest, Department of Reinforced Concrete Structures H-1521 Budapest, 1998.
[7] Wafa W., et al, "Pre-stressed High-Strength Concrete Beams Under Torsion", Journal of Structural Engineering, September, 1995, V.121, No.9.
[8] Chalioris CE., "Experimental study of the torsion of reinforced concrete members", Structural Engineering & Mechanics 2006, 23(6):713-37.
[9] American Concrete Institute, Building Code Requirements for Reinforced Concrete, ACI 318-99, 1999.
[10] Karayannis CG., "Smeared crack analysis for plain concrete in torsion", Journal of Structural Engineering ASCE 2000;126(6):638-45.
[11] Hsu T.T.C., " Torsion of Reinforced Concrete", Van Nostrand Reinhold, Inc., New York, N.Y. 1984; 516 pages.
[12] Mitchell D, Collins M.P., " Diagonal Compression Field Theory - A Rational Model for Structural Concrete in Pure Torsion", Structural Journal of the American Concrete Institute, 1974; V. 71, No.8, pp. 396- 408.
[13] Panchacharam S, Belarbi A., "Torsion Behavior of Reinforced Concrete Beams Strengthened with FRP Composites", First FIB Congress, Osaka, Japan, October 13-19,2002.
[14] Lundgren, K., "Three-Dimensional Modeling of Bond in Reinforced Concrete", PhD Thesis, Publication 99:1, Divisions of Concrete Structures, Chalmers University of Technology, Göteborg, Sweden , 1999.
[15] ANSYS User-s Manual, Vol. I-IV; Revision 5.5. (1998). Swanson Analysis System, Inc., Houston, PA.
[16] Bangash M.Y.H., "Concrete and Concrete Structures: Numerical Modeling and Applications", Elsevier Science Publishers, LTD., Essex, England.1989.
[17] Chansawat, K., "Nonlinear Finite Element Analysis of Reinforced Concrete Structures Strengthened with FRP Laminates", personal communication, Oregon State University, Corvallis, OR ,2000.
[18] William K.J, Warnke E.P., " Constitutive Model for the Triaxial Behavior of Concrete, Proceedings", International Association for Bridge and Structural Engineering, ISMES, Bergamo, Italy. 1975; V. 19, pp. 174.
[19] Kaushal P., Chetan M., "Analytical Model of Reinforced Cement Concrete Beam Using Glass Fiber Reinforced Polymer", International Journal of Advanced Engineering Technology, V. 1, Issue 1, April-June 2010, pp. 46-58.
[20] Swanson "Analysis Systems, Engineering Analysis System, Theoretical Manual for ANSYS Revision 5.4", Swanson Analysis systems, 1995.
[21] Barbosa A, Gabriel O., "Analysis of Reinforced Concrete Structures Using ANSYS Nonlinear Concrete Model", CIMNE, Barcelona, Spain, 1998.
[22] Chalioris CE., "Tests and analysis of reinforced concrete beams under torsion retrofitted with FRP strips", In: Proceedings 13th computational methods and experimental measurements. 2007, pp. 633-42.
[23] Husem M., et al, "A Calculation Method of Cracking Moment for The High Strength Concrete Beams Under Pure Torsion", Indian Academy of Sciences, Sadhana, V. 36, Part1., 2011, pp. 1-15.
[24] Deifalla A., Ghobarah A., "Full Torsional Behavior of Rc Beams Wrapped with FRP", Journal of Composites for Construction, ASCE, V. 14, No. 3, May-June 2010, pp.289-300.
[25] Lotfolahi yagin M.A, Barghlame H., "Comparison between the capacity of spiral torsion beam with tie", Second national civil congress, Elmo sanat university, IRAN, 2005.
[26] Chalioris CE., "Analytical model for the torsion behavior of reinforced concrete beams retrofitted with FRP materials", Engineering Structures 29, 2007, pp. 3263-3276.
[27] Karayannis CG, Chalioris CE., "Experimental validation of smeared analysis for plain concrete in torsion", Journal of Structural Engineering ASCE 2000;126(6):646-53.
[28] Panchacharam S., "Torsion Behavior of Reinforced Concrete Beams Strengthened with GFRP Laminates", M.S. Thesis, department of Civil Engineering, The University of Missouri - Rolla,2002; 123 Pages.