An experimental study on the flexural behavior of heavily steel reinforced beams with high-strength concrete

Abstract

In recent years, an emerging technology termed high-strength concrete (HSC) has become popular in construction industry. Present study describes an experimental research on the behavior of high-strength concrete beams in ultimate and service state. Six simply supported beams were tested, by applying comprising two symmetric concentrated loads. Tests are reported in this study on the flexural behavior of high-strength reinforced concrete (HSRC) beams made with coarse and fine aggregate together with Microsilica. Test parameter considered includes effect of being compressive reinforcement. Based on the obtained results, the behavior of such members is more deeply reviewed. Also a comparison between theoretical and experimental results is reported here. The beams were made from concrete having compressive strength of 66.81–77.72 N/mm² and percentage reinforcement ratio (ρ/ρ_b) in the range of 0.56% – 1.20%. The ultimate moment for the tested beams was found to be in a good agreement with that of the predicted ultimate moment based on ACI 318-11, ACI 363 and CSA-04 provisions. The predicted deflection based classical formulation based on code provisions for serviceability requirements is found to underestimate the maximum deflection of HSC reinforced beams at service load.

Keywords

high-strength concrete (HSC) members / flexural behavior / reinforced concrete / experimental results / ultimate moment

References

[1] Maghsoudi A A, Sharifi Y. The serviceability considerations of HSC heavily steel reinforced members under bending. American Journal of Applied Sciences, 2008, 5(9): 1135-1140

[2] Maghsoudi A A, Sharifi Y. Ductility of high strength concrete heavily steel reinforced members. Scientia Iranica Journal, 2009, 16(4): 297-307

[3] Hashemi S H, Maghsoudi A A, Rahgozar R. Bending response of HSC beams strengthened with FRP sheets. Scientia Iranica Journal, 2009, 16(2): 138-14

[4] Lopes S M R, Bernardo L F A. Plastic rotation capacity of high-strength concrete beams. Materials and Structures, 2003, 36: 22-31

[5] ACI Committee 318. Building code requirements for structural concrete (ACI 318-11) and commentary. Farmington Hills, MI: American Concrete Institute, 2011

[6] Ashour S A, Wafa F F. Flexural behavior of high strength fiber reinforced concrete beams. ACI Structural Journal, 1993, 90(3): 279-287

[7] Wafa F F, Ashour S A. Mechanical properties of high-strength fiber reinforced concrete. ACI Materials Journal, 1992, 89(5): 449-455

[8] Nilson A H. Design implication of current research on high strength concrete, High-Strength Concrete. ACI SP-87, American Concrete Institute, Detroit, 1987, 85-109

[9] Ahmad S H, Barker R. Flexural behavior of reinforced high strength light concrete beams. ACI Materials Journal, 1991, 88(1): 69-77

[10] Ashour S A. Effect of compressive strength and tensile reinforcement ratio flexural behavior of high-strength concrete beams. Engineering Structures, 2000, 22(5): 413-423

[11] Ashour S A, Wafa F F, Kamal M I. Effect of the concrete compressive strength and tensile reinforcement ratio on the flexural behavior of fibrous concrete beams. Engineering Structures, 2000, 9(22): 1133-1146

[12] Khuntia M, Ghosh S K. Flexural stiffness of reinforced concrete columns and beams. ACI Structural Journal, 2004, 101(3): 351-363

[13] Lambotte H, Taerwe L R. Deflection and cracking of high strength concrete beams and slabs, high-strength concrete. In: Hester W T, e d. Proceedings of the 2nd International Symposium. SP-121, American Concrete Institute, Farmington Hills, Mich, USA, 1990, 109-128

[14] Leslie K E, Rajagopalan K S, Everard N J. Flexural behavior of high-strength concrete beams. ACI Structural Journal, 1976, 73(9): 517-521

[15] Lin C H, Ling F S, Hwang C L. Flexural behavior of high-strength fly ash concrete beams. Journal of the Chinese Institute of Engineers, 1992, 15(1): 85-92

[16] Mansur M A, Chin M S, Wee T H. Flexural behavior of high-strength concrete beams. ACI Structural Journal, 1997, 94(6): 663-674

[17] Ozbakkaloglu T, Saatcioglu M. Rectangular stress block for high-strength concrete. ACI Structural Journal, 2004, 101(4): 475-483

[18] Paster J A, Nilson A H, Slate F O. Behavior of High-strength Concrete Beams. Report No. 84–3, Department of Structural Engineering, Cornell University, USA, 1984

[19] Paulson K A, Nilson A H, Hover K C. Long-term deflection of high-strength concrete beams. ACI Materials Journal, 1991, 88(2): 197-206

[20] Pendyala R, Mendis P, Patnaikuni I. Full-range behavior of high-strength concrete flexural members comparison of ductility parameters of high and normal-strength concrete members. ACI Structural Journal, 1996, 93(1): 30-35

[21] Sarker S, Adwan O, Munday J G L. High strength concrete: an investigation of the flexural behavior of high strength RC beams. Structural Engineer, 1997, 75(7): 115-121

[22] Tognon G, Ursella P, Coppetti G. Design and properties of concretes with strength over 1500 kgf/cm². ACI Journal Proceedings, 1980, 77(3): 171-178

[23] Swamy R N. High strength concrete–material properties and structural behavior high-strength concrete. ACI SP-87, American Concrete Institute, Detroit, 1987, 110-146

[24] Rashid M A, Mansur M A. Reinforced high-strength concrete beams in flexural. ACI Structural Journal, 2005, 102(3): 462-471

[25] CSA Technical Committee. Canadian Standards Association. CAN3–A23.3–M04, Rexdale, Ontario, Canada, 2004

[26] Sharifi Y. Effect of tensile and compressive over reinforcement ratio on ductility and behavior of high-strength concrete flexural members. Master Thesis, Kerman: University of Kerman, 2005

[27] Mohammad Hasani M. Ductility of reinforcement high-strength concrete beams with high longitudinal tensile reinforcement ratio (Special for Seismic Areas)”. Master Thesis, Kerman: University of Kerman, 2004

[28] MacGregor J, Wight J K. Reinforced concrete mechanics and design: Fourth edition in SI units. Upper Saddle River, NJ: Prentice Hall, 2006

[29] Ghali A. Deflection of reinforced concrete members, A Critical Review. ACI Structural Journal, 1993, 90(4): 364-373

[30] ACI 363R–10. Report on High-Strength Concrete, 2010, 65

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