DOI: 10.4995/thesis/10251/7342
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Modelización de elementos lineales de hormigón armado incluyendo el efecto del esfuerzo cortante

Abstract: Resumen I RESUMENLa gran mayoría de estructuras de hormigón armado compuestas por elementos lineales desarrolla esfuerzos combinados que incluyen el esfuerzo cortante. Además, algunos colapsos estructurales han sido debidos a situaciones de acoplamiento de esfuerzos que han llevado a la estructura a un fallo frágil a cortante. Por ello, resulta necesario disponer de modelos de análisis de elementos lineales que incluyan el efecto del esfuerzo cortante correctamente.El análisis y el dimensionamiento de las estr… Show more

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“…This approach has been considered by several authors (Petrangeli, Pinto et al 1999;Güner 2008 and Ceresa;Petrini et al 2009) because of its straightforward implementation in a Timoshenko based FE model: the constant distortion of the element is taken as the fixed strain in the cross section. However, this model usually underestimates the vertical strains and, for this reason, predicts lower stresses in the stirrups after the onset of diagonal cracking, as pointed out in (Vecchio and Collins 1988;Bairán and Marí 2007;Navarro 2009;Mohr 2011).…”
Section: Fixed Pattern Approachesmentioning
confidence: 93%
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“…This approach has been considered by several authors (Petrangeli, Pinto et al 1999;Güner 2008 and Ceresa;Petrini et al 2009) because of its straightforward implementation in a Timoshenko based FE model: the constant distortion of the element is taken as the fixed strain in the cross section. However, this model usually underestimates the vertical strains and, for this reason, predicts lower stresses in the stirrups after the onset of diagonal cracking, as pointed out in (Vecchio and Collins 1988;Bairán and Marí 2007;Navarro 2009;Mohr 2011).…”
Section: Fixed Pattern Approachesmentioning
confidence: 93%
“…Moreover, the development of accurate and simple shear models for the everyday design is a priority. As a matter of fact, several models were developed in the recent years with the goal of extending the fibre beam elements to analysis including shear (Navarro 2009;Saritas and Filippou 2009;Ceresa, Petrini et al 2010;), but still without reaching consensus. In fact, fibre beam models can accurately simulate the behaviour of RC frames under combined normal and shear forces, by means of multiaxial constitutive equations and suitable kinematic section assumptions (Bairán and Marí 2007).…”
Section: Introduction 11 Background and Motivationmentioning
confidence: 99%
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