Serviceability of Reinforced Concrete Gable Roof Beams with Openings under Static Loads
This paper presents an analytical study on the serviceability of reinforced concrete gable roof beams with openings of different sizes, based on an experimental study which includes 13 concrete gable roof beams with openings under static loading. For deflection and crack widths under static loading at service stage, a developed unified calculation procedure has been submitted, which includes prismatic beams with one opening subjected to flexure concentrated force. The deflection has been calculated with two methods: the first method calculated deflections via relevant equations and the second was Direct Stiffness Method in which the beam is treated as a structural member with several segments constituting the portions with solid sections and those with sections crossed by the opening. The crack width was calculated with the ACI code’s equation with a proposed magnification factor equal to 1.125. The analytical results were compared with the experimental ones and a good agreement was obtained.
Keywords:serviceability, gable roof beam, deflection, crack width, static loads
S. P. Timoshenko, D. H. Young, Theory of Structures, McGraw-Hill, 1965
G. B. Barney, W. G. Corley, J. M. Hanson, R. A. Parmelee, “Behavior and design of prestressed concrete beams with large web openings”, PCI Journal, Vol. 22, No. 6, pp. 1977 DOI: https://doi.org/10.15554/pcij.11011977.32.61
M. A. Mansur, L. M. Huang, K. H. Tan, S. L. Lee, “Deflections of Reinforced Concrete Beams with Web Openings”, ACI Structural Journal, V. 89, No. 4, 1992 DOI: https://doi.org/10.14359/3019
N. J. Carino, J. R. Clifton, Prediction of Cracking in Reinforced Concrete Structures, Building and Fire Research Laboratory, National Institute of Standards and Technology, 1995 DOI: https://doi.org/10.6028/NIST.IR.5634
ACI Standard: Commentary on Building Code Requirements for Structural Concrete (ACI 318R-95), 1995
J. V. Amiri, M. H. ALibygie, “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, Canada, August 1-6, 2004
A. S. Al-Shaarbaf, N. A-M. J. Al-Bayati, D. I. A. Al-Kaisy, “Nonlinear Finite Element Analysis of Reinforced Concrete Beams with Large Opening under Flexure”, Engineering & Technology, Vol. 25, No. 2, pp. 210-228, 2007
N. K. Oukaili, A. H. Shammari, “Response of Reinforced Concrete Beams with Multiple Web Openings to Static Load”, Fourth Asia-Pacific Conference on FRP in Structures, Melbourne, Australia, December 11-13, 2013
B. Aykac, I. Kalkan, S. Aykac, Y. E. Egriboz, “Flexural behavior of RC beams with regular square or circular web openings”, Engineering Structures, Vol. 56, pp. 2165-2174, 2013 DOI: https://doi.org/10.1016/j.engstruct.2013.08.043
S. A. Al-Sheikh, “Flexural Behavior of RC Beams with Opening”, Concrete Research Letters, Vol. 5, No. 2, pp. 812-824, 2014
M. B. Dawood, R. A. A. Nabbat, “Flexural and Shear Strength of Non-Prismatic Reinforced High Strength Concrete Beams with Openings and Strengthened WITH NSM-cfpr bars”, International Journal of Civil Engineering and Technology, Vol. 6, No. 9, pp. 93-103, 2015
K. H. Tan, Ultimate Strength of Reinforced Concrete Beams with Rectangular Openings Under Bending and Shear, MSc Thesis, National University of Singapore, 1982
M. A. Mansur, K. H. Tan, Concrete Beams with Openings: Analysis and Design, CRC Press, 1999
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