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Effect of Confinement on Cross-Sectional Performance of Steel–Concrete Composite Beams with Solid and Cellular Steel Sections


Affiliations
1 Department of Applied Mechanics, Visvesvaraya National Institute of Technology, Nagpur 440 010, India
 

The aim of this study was to compare the moment–curvature (M–Φ) characteristics of a solid composite section (SCS) and cellular composite section (CCS) of a beam under a sagging moment. The strip method, based on the principles of fundamental mechanics that consider linear strain variation across composite sections, was used to determine M–Φ. It was first developed for SCS for different parameters, i.e. the grade of concrete, unconfined and confinement strength of concrete, and effective width of a concrete slab, and then extended for CCS. CCS had a 50% depth enhancement over the steel section of SCS. Full interaction between the steel beam and the concrete slab up to the failure of the slab was assumed in the analysis. According to the M–Φ analysis, CCS enhances the ultimate moment capacity and ultimate curvature for unconfined and confined concrete. Concrete confinement for CCS effectively boosted steel material utilization and resulted in higher curvature ductility before failure. The high concrete strength and wider effective flange width of the slab resulted in high ultimate moment capacity and ultimate curvature for SCS and CCS for unconfined and confined concrete.

Keywords

Composite Beams, Concrete Confinement, Moment–Curvature Characteristics, Solid and Cellular Steel Sections.
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  • IS 11384, Code of practice for composite construction in structural steel and concrete. BIS, New Delhi, 2022.

  • EN 1994-1-1, Eurocode 4: design of composite steel and concrete structures – Part 1-1: general rules and rules for buildings. CEN, Brussels, Belgium, 2004.

  • Nethercot, D., Composite Construction, CRC Press, 2003.

  • Hauke, B., Economic application of composite beams with moderate high strength materials. In 5th European Conference on Steel and Composite Structures, Graz, Austria, 2008, pp. 3–5.

  • Nethercot, D. A., Composite steel and concrete structural members: fundamental behaviour. Eng. Struct., 1996, 18(11), 886.

  • Shamass, R. and Cashell, K. A., Behaviour of composite beams made using high strength steel. Structures, 2017, 12, 88–101.

  • Baskar, K. and Shanmugam, N. E., Steel–concrete composite plate girders subject to combined shear and bending. J. Constr. Steel Res., 2003, 59, 531–557.

  • Vasdravellis, G., Uy, B., Tan, E. L. and Kirkland, B., Behaviour and design of composite beams subjected to negative bending and compression. J. Constr. Steel Res., 2012, 79, 34–47.

  • Korkess, I. N., Yousifany, A. H., Abdul-Majeed, Q. and Husain, H. M., Behavior of composite steel–concrete beam subjected to negative bending. Eng. Techonol., 2009, 27, 53–72.

  • IS 800, General Construction in steel-code of practice. BIS, New Delhi, 2007.

  • Johnson, R. P., Composite structures of steel and concrete: beams, slabs, columns and frames for buildings. In Composite Structures of Steel and Concrete, John Wiley, 2018, pp. 1–265.

  • Kirkland, B., Kim, P., Uy, B. and Vasdravellis, G., Moment–shear–axial force interaction in composite beams. J. Constr. Steel Res., 2015, 114, 66–76.

  • Yakel, A. J. and Azizinamini, A., Improved moment strength prediction of composite steel plate girders in positive bending. J. Bridge Eng., 2005, 10, 28–38.

  • Zhao, H. and Yuan, Y., Experimental studies on composite beams with high-strength steel and concrete. Steel Compo. Struct., 2010, 10, 373–383.

  • Ismail, R. E. S., Fahmy, A. S. and Tawfik, N. M., Ultimate behavior of composite castellated beams under vertical loads. Int. J. Comput. Appl., 2014, 108, 40–46.

  • Al-Zuhairi, A. H. A., Mansi, A. I. and Anbar-Iraq, B., Behavior of composite concrete castellated steel beams in flexur. In 1st International Conference on Recent Trends of Engineering Sciences Sustainability, University of Baghdad – College of Engineering, 2017.

  • Ferreira, F. P. V., Martins, C. H. and de Nardin, S., Advances in composite beams with web openings and composite cellular beams. J. Constr. Steel. Res., 2020, 172, 106–182.

  • Popovics, S., A numerical approach to the complete stress–strain curve of concrete. Cem. Concr. Res., 1973, 3, 583–599.

  • Mander, J. B., Priestley, M. J. N. and Park, R., Theoretical stress–strain model for confined concrete. J. Struct. Eng., 1988, 114, 1804–1826.

  • Renić, T. and Kišiček, T., Ductility of concrete beams reinforced with FRP rebars. Buildings, 2021, 11.

  • Radnic, J., Markic, R., Harapin, A. and Matesan, D., Effect of confined concrete on compressive strength of RC beams. Adv. Concr. Constr., 2013, 1, 215–225.

  • Bing, L., Park, R. and Tanaka, H., Stress–strain behavior of high-strength concrete confined by ultra-high and normal-strength transverse reinforcements. ACI Struct. J., 2001, 98, 395–406.

  • Lokuge, W. P., Sanjayan, J. G. and Setunge, S., Stress–strain model for laterally confined concrete. J. Mater. Civ. Eng., 2005, 17, 607–616.

  • Jang, I.-Y., Park, H.-G., Kim, Y.-G., Kim, S.-S. and Kim, J.-H., Flexural behavior of high-strength concrete beams confined with stirrups in pure bending zone. Int. J. Concr. Struct. Mater, 2009, 3, 39–45.

  • Djebli, B., Elddine, D. and Abidelah, A., Additional and total deflection of composite symmetric cellular beams. J. Constr. Steel Res., 2019, 158, 99–106.

  • Lawson, R. M., Lim, J., Hicks, S. J. and Simms, W. I., Design of composite asymmetric cellular beams and beams with large web openings. J. Constr. Steel Res., 2006, 62, 614–629.

  • Chung, K. F. and Lawson, R. M., Simplified design of composite beams with large web openings to Eurocode 4. J. Constr. Steel Res., 2001, 57, 135–164.

  • IS 12778, Hot rolled parallel flange steel sections for beams, columns and bearing piles – dimensions and section properties. BIS, New Delhi, 2004.

  • IS 456, Plain and reinforced concrete – code of practice. BIS, New Delhi, 2000.

  • IS 2062, Indian standard hot rolled medium and high tensile structural steel – Specification. BIS, New Delhi, 2011.


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  • Effect of Confinement on Cross-Sectional Performance of Steel–Concrete Composite Beams with Solid and Cellular Steel Sections

Abstract Views: 169  |  PDF Views: 98

Authors

Pankaj R. Teware
Department of Applied Mechanics, Visvesvaraya National Institute of Technology, Nagpur 440 010, India
Ashish P. Khatri
Department of Applied Mechanics, Visvesvaraya National Institute of Technology, Nagpur 440 010, India

Abstract


The aim of this study was to compare the moment–curvature (M–Φ) characteristics of a solid composite section (SCS) and cellular composite section (CCS) of a beam under a sagging moment. The strip method, based on the principles of fundamental mechanics that consider linear strain variation across composite sections, was used to determine M–Φ. It was first developed for SCS for different parameters, i.e. the grade of concrete, unconfined and confinement strength of concrete, and effective width of a concrete slab, and then extended for CCS. CCS had a 50% depth enhancement over the steel section of SCS. Full interaction between the steel beam and the concrete slab up to the failure of the slab was assumed in the analysis. According to the M–Φ analysis, CCS enhances the ultimate moment capacity and ultimate curvature for unconfined and confined concrete. Concrete confinement for CCS effectively boosted steel material utilization and resulted in higher curvature ductility before failure. The high concrete strength and wider effective flange width of the slab resulted in high ultimate moment capacity and ultimate curvature for SCS and CCS for unconfined and confined concrete.

Keywords


Composite Beams, Concrete Confinement, Moment–Curvature Characteristics, Solid and Cellular Steel Sections.

References





DOI: https://doi.org/10.18520/cs%2Fv124%2Fi12%2F1401-1411