Torsional Strength Prediction of RC Hybrid Deep T-Beam with an Opening using Softened Truss Model
Keywords:Pure torsion, RC hybrid deep T-beams, softened truss model, torque capacity, twist angle.
AbstractThis paper presents an analytical study to predict the torsional behavior of reinforced concrete (RC) hybrid deep T-beam with opening and to compare to the experimental results. The RC hybrid deep T-beam was cast with normal weight concrete web and light weight concrete flanges. Based on the Softened Truss Model and Bredt’s theory, a new equation was derived and proposed to show the relationship between compression strut of light weight concrete and normal weight concrete. Based on the experimental results of cracking angles and curvature equation of light weight concrete and normal weight concrete, a new equation was also proposed to show the relationship between strain diagram of light weight concrete and normal weight concrete. The analytical results show that the prediction of maximum torque capacity of the beams are close to the experimental results, except the prediction of twist angle which are larger than the experimental results.
Alwis, W.A.M., Mansur, M.A., Torsional Strength of RC Beams Containing Rectangular Openings, Journal of Structural Engineering, ASCE, 113 (11), 1987, pp. 2248-2258.[CrossRef]
Hsu, T.T.C., Mo, Y.L., Softening of Concrete in Torsional Members-Theory and Tests, ACI Journal Proceeding, 82(3), 1985, pp. 290-303.
Hsu, T.T.C., Mo, Y.L., Softening of Concrete in Torsional Members-Design Recommendations, ACI Journal Proceeding, 82(4), 1985, pp. 443-452.
Hsu, T.T.C., Softened Truss Model Theory for Shear and Torsion, ACI Structural Journal, 85 (6), 1988, pp. 624-635.
Hsu, T.T.C., Nonlinear Analysis of Concrete Membrane Elements, ACI Structural Journal, 88(5), 1991, pp. 552-561.
Hsu, T.T.C., Nonlinear Analysis of Concrete Torsional Members, ACI Structural Journal, 88 (6), 1991, pp. 674-682.
Hsu, T.T.C., Unified Theory of Reinforced Concrete, CRC Press Inc., Florida, 1993.
Ali, M.A., White, R.N., Toward a Rational Approach for Design of Minimum Torsion Reinforcement, ACI Structural Journal, 96(1), 1999, pp. 40-45.
ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318M-08) and Commentary, American Concrete Institute, Detroit, 2008.
Akhtaruzzaman, A.A., Hasnat, A., Torsion in Concrete Deep Beams with an Opening, ACI Structural Journal, 86(1), 1989, pp. 20-25.
Samman, T.A., Radain, T.A., Al-Harbi, M.N., Torsional Behavior of High Strength Concrete Deep Beams, Proceeding of Fourth International Symposium on the Utilization of High strength/High Performance Concrete, 3, Paris, 1996, pp. 1003-1008.
Lisantono, A, Besari, M.S., Suhud, R., Soemardi, B.W., The Effect of LWC Flanges and Web Opening on the Torsional Capacity of Reinforced Concrete Deep T-Beams, Proceeding of the Eighth East Asia-Pasific Conference on the Structural Engineering and Construction, Nanyang Technological University, Singapore, 2001, Paper No. 1349.
Lisantono, A., Besari, M.S., Suhud, R., Soemardi, B.W., The Effect of Web Opening Location on the Torsional Behavior of Reinforced Concrete Hybrid Deep T-Beams, Jurnal Teknik Sipil, Universitas Tarumanagara, 2, 2002, pp. 183-194.
Lisantono, A., Besari, M.S., Suhud, R., Soemardi, B.W., Experimental Study on the Effect of Web Opening Location on the Behavior of Reinforced Concrete Hybrid Deep T-Beam Subjected to Pure Torsion-Various Location in the Vertical Direction, Media Teknik, Majalah Ilmiah Teknologi, Universitas Gadjah Mada, 4, 2002, pp. 16-22.
Lisantono, A., Besari, M.S., Suhud, R., Soemardi, B. W., Experimental Investigation on the Effect of Web Opening Dimension on the Behavior of RC Hybrid Deep T-Beam Subjected to Pure Torsion, Jurnal Teknik Sipil, Institut Teknologi Bandung, 11(1), 2004, pp. 1-7.
Hsu, T.T.C., Torsion of Reinforced Concrete, Van Nostrand Reinhold Company, New York, 1984.
Vecchio, F.J., Collins, M.P., Stress-Strain Characteristics of Reinforced Concrete in Pure Shear, IABSE Colloquium on Advanced Mechanics of Reinforced Concrete, Final Report, International Association for Bridge and Structural Engineering, Zurich, 1981, pp. 211-225.
Belarbi, A., Hsu, T.T.C., Constitutive Laws of Softened Concrete in Biaxial Tension-Com-pression, Research Report UHCEE 91-2, Department of Civil and Environmental Engineering, University of Houston, Houston, 1991.
MacGregor, J.G., Wight, J.K., Reinforced Concrete Mechanics and Design, Prentice Hall, Pearson Education South Asia Pte Ltd, Singapore, 2005.
Comite Euro-International Du Beton, CEB-FIP Model Code 1990, Bulletin D’information, No. 213/214, Thomas Telford, Lausane, 1993.
Lampert, P., Thurlimann, B., Torsion Tests of Reinforced Concrete Beams, Report No. 6506-2, June, Institut fur Baustatik, Zurich, Switzerand, 1968.
Lampert, P., Thurlimann, B., Torsion-Bending Tests on Reinforced Concrete Beams, Report No. 6506-3, January, Institut fur Baustatik, Zurich, Switzerland, 1969.
Lisantono, A., Studi Perilaku Torsi Murni Balok Tinggi-T Hybrid Beton Normal dan Ringan dengan Bukaan pada Badan, Disertasi, Institut Teknologi Bandung, 2004.
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain the copyright and publishing right, and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) followingthe publication of the article, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).