Abstract

CHANCHI GOLONDRINO, José Christian  and  MARIN TORRES, Luz Ángela. Two approaches to design methodology at T sections bending moment in reinforced concrete which behave as rectangular sections and constitute the straight sections of beams of light slabs. Rev. ing. univ. Medellin [online]. 2008, vol.7, n.12, pp.61-86. ISSN 1692-3324.

This article presents two approaches on the moment design equation of T shaped beams. Particularly the beam's T cross section analyzed behaves like a rectangular cross section when the beam works like a component of a slab system built from a set of T shaped beams. The first approach discusses the feasibility to use the web width instead of effective flange width to obtain the steel area associated to the moment solicitation of T shaped beam. The second approach discusses the feasibility to approach the quadratic equation used to obtain the steel required to take the bending moment into linear equation related to variables such as steel area and the effective depth of the T shaped cross section. It has designed geometrically a set of slabs (built from T shaped beams) according to the regulations presented in the chapter C13 of the Seismic Constructions Colombian Code. The other hand the reinforcement associated to the slabs was obtained for single supported T shaped beams with spans in the range [2 - 7] m and separations between them in the range [0.30 - 1.00] m. The design process described above was used to check the reliability of the discussed approaches with respect to the general solution (quadratic equation) used to obtain the reinforcement of a T shaped beam when the behaviour of its section is close to a rectangular equivalent cross section.

Keywords : T shaped slab system; T shaped section; Bending moment design; T shaped singled supported beam.

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