Numerical Investigation of the Flexure Behavior of Reinforced Concrete Spandrel Beams with Distributed Tension Reinforcement
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Abstract
When the flange of a reinforced concrete spandrel beam is in tension, current design codes and specifications enable a portion of the bonded flexure tension reinforcement to be distributed over an effective flange width. The flexural behavior of the RC L-shaped spandrel beam when reinforcement is laterally displaced in the tension flange is investigated experimentally and numerically in this work. Numerical analysis utilizing the finite element method is performed on discretized flanged beam models validated using experimentally verified L-shaped beam specimens to achieve study objectives. A parametric study was carried out to evaluate the influence of various factors on the beam’s flexure behavior. Results showed that as the percentage of the reinforcement distributed has increased over a greater width of the flange, a considerable drop in beam flexure strength was observed with excessive deflection. According to the study, not more than 33% of the web tension reinforcement might be distributed over an effective flange width less than ln/10, including the web region, as recommended by the ACI318-14.
Article received: 17 /8/ 2021
Article accepted: 3/10/ 2021
Article published:1/3/2022
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References
• Darwin, D., Dolan, C., and Nilson, A., 2015. Design of Concrete Structures. 15th Edition, McGraw Hill.
• Cladera, A., Marí, A., Ribas, C., Bairán, J., and Oller, E., 2015. Predicting the shear-flexural strength of slender reinforced concrete T and I shaped beams. Eng. Struct. 101, 386-396, http://dx.doi.org/10.1016/j.engstruct.2015.07.025.
• González, C. R., and Ruiz, M. F., 2017. Influence of flanges on the shear-carrying capacity of reinforced concrete beams without web reinforcement, Int. Federation for Structural Concrete, Str. Con., 1-13, DOI: 10.1002/suco.201600172.
• Shaaban, I. G., Saidani, M., Nurddin, M. F., Malkawi, A. B., and Mustafa, T. S., 2017. Serviceability behavior of normal and high-strength reinforced concrete T-beams. Eur. J. Mat. Sci. Eng. 2, 99-110.
• Bousalem B., Benzaid R., Chikh N., and Mesbah H., 2017. Flexural Analysis of RC Rectangular and T Beams Strengthened with NSM FRP Reinforcement. I. J. of Civil Eng. and Const. Science, 4(1): 1-10.
• Pohoryles D.A., Melo J., and Rossetto T., 2021. Combined Flexural and Shear Strengthening of RC T-Beams with FRP and TRM: Experimental Study and Parametric Finite Element Analyses. Buildings 11, 520, https://doi.org/10.3390/buildings11110520.
• McCormac, J. C., and Brown, R. H., 2015. Design of Reinforced Concrete. 10th Edition, John Wiley & Sons.
• Abbas, R. M., and Shaker, H. J., 2015. Finite Element Investigation on Shear Lag in Composite Concrete-Steel Beams with Web Openings. J. Eng. 21, 11-33.
• Qin, X. X., Liu, H. B., Wang, S. J. Z., and Yan, h., 2014. Simplistic Analysis of the Shear Lag Phenomenon in a T-Beam. J. Eng. Mech. (ASCE) 15, https: //doi.org/10.1061/ (ASCE)EM.1943-7889.0000882.
• ACI 318M-19, 2019. Building Code Requirements for Structural Concrete and Commentary. an ACI Standard, American Concrete Institution.
• Ahmed, A., 2014. Modeling of a reinforced concrete beam subjected to impact vibration using ABAQUS. Vol. 4, No 3, 0976 – 4399.
• Simulia, 2013. Abaqus Analysis User’s Guide. Dassault Systèmes Simulia Corp.
• Simulia, 2014. Getting Started with Abaqus: Interactive Edition. Dassault Systèmes Simulia Corp.