shear strength prediction of non flexural rc deep beams using various approaches.
Sharan Basava,C.D.Modhera
Published in International Journal of Advanced Research in Civil,Structural,Environmental and Infrastructure Engineering and Developing
ISSN: 2320-723X Impact Factor:1.7 Volume:1 Issue:3 Year: 08 April,2014 Pages:116-122
Abstract
In this study, shear behavior of RC non flexural deep beams which are predominant in shear were studied. According to ACI 318-08(1), deep beams are classified as shear span to depth (a/d) ratio less than 2.5, shear capacity of deep beam was worked out by ACI 318 equation 11.30 and 11.31 and results were compared with modified ACI equation by Tan et al( 2). Strut and tie approach is also used which are suggested by many codes like ACI 318 (appendix A) and Euro code 2(3). Shear capacity found from STM analysis was compared with ACI 318 equation and modified ACI equation. Parameters considered for the study are a/d ratio ranging from 0.5 to 1 and compressive strength of concrete (25MPa, 50Mpa), shear reinforcement varied between 0 to 0.17%. It is seen from the analysis that both ACI 318-99 and modified ACI equation does not consider the effect of shear span to depth (a/d) ratio and STM approach was found much rational.
Kewords
Strut and tie method, Deep beams, ACI 318
Reference
[1]. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary (318R-08),” American Concrete Institute, Farmington Hills, MI, 2008. [2]. Tan, K. H.; Kong, F. K.; Teng, S.; and Guan, L., “High-Strength Concrete Deep Beams with Effective Span and Shear Span Variations, “ACI Structural Journal, V. 92, No. 4, July-Aug. 1995, pp. 395-405. [3]. The European standard EN 1992-1-1:2004. Eurocode 2 : Design of concrete structures – part 1-1 : general rules rules for building. BSI, London,2004 [4]. Wen-Yao Lu, Ing-Jaung Lin, and Hsin-Wan Yu, “ Shear Strength of Reinforced Concrete Deep Beams”, ACI Structural Journal, V. 110, No. 4, July-August 2013. [5]. K. N. Smith and A. S. Vantsiotis, “Shear Strength of Deep Beams”, ACI Structural Journal, V.76, May-June 1982 [6]. David M. Rogowsky, James G. MacGregor, and See Y. Ong, “Tests of Reinforced Concrete Deep Beams”, ACI Structural Journal, V.79, July-August 1986
