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Experimental study on simplified steel reinforced concrete beam-column joints in construction technology

  • Teraoka, Masaru (Technology Development Division, Fujita Corporation) ;
  • Morita, Koji (Department of Design and Architecture, Faculty of Engineering, Chiba University) ;
  • Sasaki, Satoshi (Technology Development Division, Fujita Corporation) ;
  • Katsura, Daisuke (Technology Development Division, Fujita Corporation)
  • Published : 2001.09.25

Abstract

The purpose of this paper is to propose a new type of steel reinforced concrete (SRC) beam-column joints and to examine the structural performance of the proposed joints, which simplify the construction procedure of steel fabrication, welding works, concrete casting and joint strengthening. In the proposed beam-column joints, the steel element of columns forms continuously built-in crossing of H-sections (${\Box}$), with adjacent flanges of column being connected by horizontal stiffeners in a joint at the level of the beam flanges. In addition, simplified lateral reinforcement (${\Box}$) is adopted in a joint to confine the longitudinal reinforcing bars in columns. Experimental and analytical studies have been carried out to estimate the structural performance of the proposed joints. Twelve cruciform specimens and seven SRC beam-column subassemblage specimens were prepared and tested. The following can be concluded from this study: (1) SRC subassemblages with the proposed beam-column joints show adequate seismic performances which are superior to the demand of the current code; (2) The yield and ultimate strength capacities of the beam-to-column connections can be estimated by analysis based on the yield line theory; (3) The skeleton curves and the ultimate shear capacities of the beam-column joint panel are predicted with a fair degree of accuracy by considering a simple stress transfer mechanism.

Keywords

new type of SRC beam-column joint;simplifying construction procedure;structural performance;limit analysis;yield line theory

References

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  2. Experimental behavior of transfer story connections for high-rise SRC structures under seismic loading vol.40, pp.9, 2011, https://doi.org/10.1002/eqe.1067
  3. Behavior and strength of steel reinforced concrete beam–column joints with single-side force inputs vol.65, pp.8-9, 2009, https://doi.org/10.1016/j.jcsr.2009.04.003
  4. Behavior and strength of steel reinforced concrete beam–column joints with two-side force inputs vol.65, pp.3, 2009, https://doi.org/10.1016/j.jcsr.2008.03.010
  5. Structural performance of steel-truss-reinforced composite joints under cyclic loading vol.171, pp.2, 2018, https://doi.org/10.1680/jstbu.16.00188