Research Articles | Challenge Journal of Concrete Research Letters

Analytical and experimental study on shear performance of RCC beam elements reinforced with PSWC rebars: a comparative study

Shoib Bashir Wani, Sarvat Gull, Ishfaq Amin, Ayaz Mohmood



Early distress in RCC (Reinforced Cement Concrete) structures in the recent times poses a major problem for the construction industry. It is found that in most of cases, distresses in reinforced concrete structures are caused by corrosion of rebar embedded in the concrete. The HYSD (High Yield Strength Deformed)  rebars which are used to offer excellent strength properties is detrimental to durability due to action of ribs as stress concentrators. Nowadays, concept of PSWC rebars (plain surface with wave type configuration rebars, formerly known as C-bars/mild steel rebar with curvy profile) is emerging to have a compromise between strength and durability. This investigation assesses the flexural behaviour of RCC elements reinforced with PSWC rebars. The flexural performance of RC beams of size 1000mm x 150mm x 150mm reinforced with PSWC rebars at 4mm and 6mm deformation level was studied by conducting test as per IS 516-1959 under four point loading. The performance of PSWC bar reinforced elements are compared with beams reinforced with mild steel rebars, HYSD rebars with spiral and diamond rib configuration to assess the viability of PSWC rebars to replace conventional reinforcement. The test results are validated by numerical analysis with the help of ANSYS software. Totally 15 beams are subjected to flexure test and the performance evaluators are first crack load, deflection at first crack load, ultimate load carrying capacity, deflection at ultimate load, load-deflection behaviour, load-strain behaviour and failure pattern. It is found that PSWC rebars as reinforcement in concrete beams enhanced the ductile behaviour of beams as compared to conventional HYSD and mild steel rebar beams. The energy absorbing capacity has increased significantly for beams reinforced with PSWC rebars when compared with conventional HYSD and mild steel rebar beams. The load-deflection behaviour and failure mode of PSWC rebars reinforced concrete beams were found to be similar to that of high yield strength rebars irrespective of deformation level. The analytical investigation from ANSYS software gave good agreement with the experimental results. It is concluded that PSWC bar has the potential to replace conventional HYSD rebar. Further study needs to be done to optimize the profile level and stirrup locations; and usage with high concrete grade for effective exploitation.


reinforced cement concrete; ANSYS; MS rebar; HYSD rebar; PSWC rebar; rib configuration

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Gagg CR (2014). Cement and concrete as an engineering material: an historic appraisal and case study analysis. Engineering Failure Analysis, 40, 114-140.

Garden HN, Quantrill RJ, Hollaway LC, Thorne AM, Parke GAR (1998). An experimental study of the anchorage length of carbon fibre composite plates used to strengthen reinforced concrete beams. Construction and Building Materials, 12(4), 203-219.

Goyal A, Pouya HS, Ganjian E, Claisse P (2018). A review of corrosion and protection of steel in concrete. Arabian Journal for Science and Engineering, 43(10), 5035-5055.

Hobbs DW (2001). Concrete deterioration: causes, diagnosis, and minimising risk. International Materials Reviews, 46(3), 117-144.

IS:269 (1989). Specification for Ordinary Portland Cement. Bureau of Indian Standards, New Delhi, India.

IS:516-1959 (2004). Indian Standard Methods for Test on Concrete. Bureau of Indian Standards, New Delhi, India.

IS:2720 (1985). Methods of Tests for Soils, Part IV. Bureau of Indian Standards, New Delhi, India.

IS:4031 (1989). Methods of Physical Tests for Hydraulic Cement. Part 6: Determination of Compressive Strength of Hydraulic Cement other than Masonry Cement. Bureau of Indian Standards, New Delhi, India.

IS:2386 (1963). Methods of Test for Aggregates for Concrete–Part 1: Particle Size and Shape. Bureau of Indian Standards, New Delhi, India.

IS:10262 (2009). Concrete Mix Proportioning—Guidelines. Bureau of Indian Standards, New Delhi, India.

Kar AK (2012). Durability of concrete bridges and viaducts. The Masterbuilder, 14(7), 110-130.

Kar AK (2019). U.S. Patent Application No. 16/260,951.

Marcos-Meson V, Michel A, Solgaard A, Fischer G, Edvardsen C, Skovhus TL (2018). Corrosion resistance of steel fibre reinforced concrete-a literature review. Cement and Concrete Research, 103, 1-20.

Meddah MS, Bencheikh M (2009). Properties of concrete reinforced with different kinds of industrial waste fibre materials. Construction and Building Materials, 23(10), 3196-3205.

Nanni A (2003). North American design guidelines for concrete reinforcement and strengthening using FRP: principles, applications and unresolved issues. Construction and Building Materials, 17(6-7), 439-446.

Neville AM (1987). Why we have concrete durability problems. Katherine and Bryant Mather International Conference on Concrete Durability, American Concrete Institute, Detroit, ACI SP-100, 21-48.

Song HW, Saraswathy V (2007). Corrosion monitoring of reinforced concrete structures – a review. International Journal of Electrochemical Science, 2, 1-28.

Zhao Y, Yu J, Jin W (2011). Damage analysis and cracking model of reinforced concrete structures with rebar corrosion. Corrosion Science, 53(10), 3388-3397.