Resumen

LUEVANOS ROJAS, Arnulfo. Modelado para vigas de sección transversal "I" sometidas a una carga uniformemente distribuida con cartelas rectas. Ingenier. mecáni. tecnolog. desarroll [online]. 2015, vol.5, n.2, pp.281-292. ISSN 1665-7381.

This paper presents a mathematical model for beams of cross section "I" with straight haunches for the general case (symmetrical and/or non-symmetrical) subjected to a uniformly distributed load taking into account the bending deformations and shear to obtain the fixed-end moments, carry-over factors and stiffness factors, which is the novelty of this research. The properties of the cross section of the beam vary along its axis "x", i.e., the flange width "b", the flange thickness "t", the web thickness "e" are constant and the height "d" varies along the beam, this variation is linear type. The consistent deformation method is used to solve such problems, and the deformations anywhere of beam are found by the conjugate beam method through exact integrations using the software "Derive" to obtain some results. The traditional model takes into account only bending deformations, and others authors present tables considering the bending deformations y shear, but are restricted. Besides the effectiveness and accuracy of the developed models, a significant advantage is that fixed-end moments, carry-over factors and stiffness factors are calculated for any cross section of the beam "I" using the mathematical formulas.

Palabras llave : beams of cross section "I"; uniformly distributed load; straight haunches; fixed-end moments; carry-over factors; stiffness factors.

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