Shear Behavior and Performance of Deep Beams Made with Self-Compacting Concrete

Abstract

An experimental study was carried out to evaluate fresh properties of a moderately high-strength (high-flowing) selfcompacting concrete (SCC) and to investigate shear behavior and performance of deep beams made with SCC. Fresh and hardened properties of normal concrete (NC) and SCC were evaluated. The workability and compacting ability were observed based on casting time and number of surface cavities, respectively. Four-point loading tests on four deep beams (two made with SCC and two with NC) were then conducted to investigate their shear behavior and performance. Shear behavior and performance of beams having two different web reinforcements in shear were systematically investigated in terms of crack pattern, failure mode, and load-deflection response. It was found from the tests that the SCC specimen having a normal shear reinforcement condition exhibited a slightly higher load carrying capacity than the corresponding NC specimen, while the SCC specimen having congested shear reinforcement condition showed a similar load carrying capacity to the corresponding NC specimen. In addition, a comparative study between the present experimental results and theoretical results in accordance with ACI 318 (Building Code Requirements for Reinforced Concrete (ACI 318-89) and Commentary-ACI 318R-89, 1999), Hsu-Mau's explicit method (Hsu, Cem Concr Compos 20:419-435, 1998; Mau and Hsu, Struct J Am Concr Inst 86:516-523, 1989) and strut-and-tie model suggested by Uribe and Alcocer (2002) based on ACI 318 Appendix A (2008) was carried out to assess the applicability of the aforementioned methods to predict the shear strength of SCC specimens.

Shear Behavior of Hybrid Fiber Reinforced Concrete Deep Beams

“…The failure mode of deep beams was usually shear failure rather than flexure failure. It has been widely shown that the shear capacity of RC deep beams increased as the strength of the concrete and web reinforcement ratio increased [ 23 , 24 , 25 ]. FRC deep beams exhibit smaller crack widths and higher ultimate loads than those of RC deep beams [ 26 , 27 , 28 , 29 , 30 ] researched the flexural behavior of RC and FRC deep beams.…”

Effectiveness factor of self-compacting concrete in compression for limit analysis of continuous deep beams

“…Experimental results showed that there was a 35 to 45% reduction in shear strength of simply supported SCC deep beams and higher mid-span deflection compared with their NC counterparts [6] owing to the lower amount and smaller size of coarse aggregate used in SCC mixtures. A number of studies on simply supported SCC deep beams [5,13] pointed out that the experimental shear capacity is much higher than that predicted by the shear provisions of the ACI 318-08. However, the prediction of the STM suggested by the ACI 318-08 was reasonably close to the experimental results of simply supported SCC deep beams [5] .…”

Shear Strength of Rc Deep Beam Panels – A Review

“…11(c)) (Mohammadhassani et al 2011). In Self compacting concrete (Choi et al 2012) and prestressed concrete deep beams (Tan et al 1999) failure mode is shear compression ( Fig. 11(e)).…”