Abstract
In the present study, an attempt has been made to experimentally investigate the flexural performance of ten simply supported reinforced concrete gable roof beams, including solid control specimen (i.e., without openings) and nine beams with web openings of different dimensions and configurations. The nine beams with openings have identical reinforcement details. All beams were monotonically loaded to failure under mid-span loading. The main variables were the number of the created openings, the total area of the created openings, and the inclination angle of the posts between openings. Of interest is the load-carrying capacity, cracking resistance and propagation, deformability, failure mode, and strain development that represent the behavior of reinforced concrete gable beams. Test results showed that the total concrete weight consumed for the tested gable beams with openings was lower than the solid gable beam by (14.9–26%). This reduction in weight led to a reduction in the flexural stiffness and, in turn. in the load-carrying capacity by (6.2–17.9%). The percentage of the decrease in the concrete consumption to the reduction in the load-carrying capacity for the tested beams with openings attained (140–240%). It was recorded that the maximum crack width depended on the total area of the created openings rather than the number of these openings.
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References
Baykov VN, Seagalov EE (1991) Reinforced concrete structures, general course: textbook. For Universities. 4th edn. M. Stroyizdat, Russia
Mansur MA, Tan KH (1999) Concrete Beams with Openings: Analysis and Design. CRC Press, Boca Raton
Nasser KW, Acavalas A, Daniel HR (1967) Behavior and design of large openings in reinforced concrete beam. Am Concrete Inst J 64(1):25–33
Prentzas EG (1986) Behavior and reinforcement of concrete beams with large rectangular apertures. (PhD thesis), University of Sheffield, Sheffield UK, pp 230
Salam SA (1977) Beams with openings under different stress conditions. In: Proceeding of 3rd Conference on Our World in Concrete and Structures, CI Premier, Singapore, pp 259–267
Mansur MA, Tan KH, Lee SL (1985) Design method for reinforced concrete beams with large openings. ACI J 82(4):517–524
Mansur MA, Lee YF, Tan KH, Lee SL (1991) Tests on R/C continuous beams with openings. J Struct Eng 117:1593–1606
Amiri JV, ALibygie MH (2004) Effect of small circular opening on the shear and flexural behavior and ultimate strength of reinforced concrete beams using normal and high strength concrete. 13th World Conference on Earthquake Engineering, Vancouver, BC, Canada, Paper No.3239
Oukaili NK, Shammari AH (2013) Response of reinforced concrete beams with multiple web openings to static load. Fourth Asia-Pacific Conference on FRP in Structures, Melbourne, Australia
AL-Sheikh NQ (2014) Flexural behavior of RC beams with opening. Concrete Res 5(2):44–48
Jassim NQ, Jarallah HK (2018) Performance enhancement of RC beams with large web openings by using reactive powder composite. Al-Nahrain J Eng Sci 21(3):405–416
Ehmann S, Schnellenbach-Held M (2001) Behavior and design of reinforced concrete beams with large openings. Fracture Mech Concrete Struct 903–909
Al-Shaarbaf AS, Al-Bayati NA-M, Al-Kaisy DI (2007) Nonlinear finite element analysis of reinforced concrete beams with large opening under flexure. Eng Technol 25(2):210–228
Madkour H, Ahmed K (2007) Three-dimensional modelling for reinforced concrete beams with openings based on nonlinear elastic-damage theory. J Eng Sci Assiut Univ 35(1):9–27
Saksena NH, Patel PG (2013) Effects of the circular openings on the behavior of concrete beams without additional reinforcement in opening region using FEM method. Int J Adv Eng Technol 4(2):40–42
Shubbar A, Alwan H, Phur EY, McLoughlin J, Al-khaykan A (2017) Studying the structural behavior of RC beams with circular openings of different sizes and locations using FE method. World Acad Sci Eng Technol Int J Struct Const Eng 11(7):916–919
Hassan MA-J, Izzet AF (2019) Finite element modeling of RC gable roof beams with openings of different sizes and configurations. Mech Adv Mater Struct 26:1–17
ASTM Designation C39-86 (2002) Compressive strength of cylindrical concrete specimens, Annual book of ASTM standards, American society for testing and materials, Philadelphia, PA 4(4)
ASTM C496/C496M (2011) Standard test for splitting tensile strength of cylindrical concrete specimens, Annual book of ASTM standards, Concrete and aggregates, West Conshohocken, PA 04.02
ASTM C469 (2001) Standard test method for static modulus of elasticity and Poisson’s ratio of concrete in compression, Annual book of ASTM standards, Concrete and aggregates, West Conshohocken, PA 04.02
ASTM Designation A615 (2009) Standard specification for testing method and definitions for mechanical testing of steel products, Annual book of ASTM standards, American society for testing and material, Philadelphia, PA 1.01(1): 248–287
ASTM A496 (2007) Standard specification for steel wire, deformed, for concrete reinforcement, Annual book of ASTM standard 01.05:425–429
Xianglin G, Xianyu J, Yong Z (2015) Basic principles of concrete structures. ShanghaiP Tongji University Press, China
Tan KH (1982) Ultimate strength of reinforced concrete beams with rectangular opening under bending and shear (MEng Thesis). National University of Singapore
Mansur MA, Huang LM, Tan KH, Lee SL (1992) Deflections of reinforced concrete beams with web openings. ACI Struct J 89(4):391–397
Joshi S, Paul S, Balakrishnan B, Menon D (2015) Moment-curvature relation of Reinforced Concrete T-beam sections—numerical and experimental studies. In: Proc. of the Third Intl. Conf. on Advances in Civil, Structural and Construction Engineering, pp 11–17
Aykac B, Kalkan I, Aykac S, Egriboz YE (2013) Flexural behavior of RC beams with regular square or circular web openings. Eng Struct 56:2165–2174
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Hassan, M.A.J., Izzet, A.F. & Oukaili, N.K. Structural Performance Under Monotonic Static Loading of Reinforced Concrete Gable Roof Beams with Multiple Web Openings. Int J Civ Eng 19, 421–440 (2021). https://doi.org/10.1007/s40999-020-00578-5
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DOI: https://doi.org/10.1007/s40999-020-00578-5