Modelization of low cycle fatigue damage in frames

Perera Velamazán, Ricardo; Alarcón Álvarez, Enrique y Carnicero, Alberto (2000). Modelization of low cycle fatigue damage in frames. En: "12th World Conference on Earthquake Engineering", 30/01/2000-04/02/2000, Auckland, New Zeland. ISBN 0958215448.


Título: Modelization of low cycle fatigue damage in frames
  • Perera Velamazán, Ricardo
  • Alarcón Álvarez, Enrique
  • Carnicero, Alberto
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 12th World Conference on Earthquake Engineering
Fechas del Evento: 30/01/2000-04/02/2000
Lugar del Evento: Auckland, New Zeland
Título del Libro: 12 WCEE 2000 : 12th World Conference on Earthquake Engineering; Auckland, New Zeland, Sunday 30 January - Friday 4 February 2000
Fecha: 2000
ISBN: 0958215448
Volumen: 1
Escuela: E.T.S.I. Industriales (UPM)
Departamento: Mecánica Estructural y Construcciones Industriales [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Damage models based on the Continuum Damage Mechanics (CDM) include explicitly the coupling between damage and mechanical behavior and, therefore, are consistent with the definition of damage as a phenomenon with mechanical consequences. However, this kind of models is characterized by their complexity. Using the concept of lumped models, possible simplifications of the coupled models have been proposed in the literature to adapt them to the study of beams and frames. On the other hand, in most of these coupled models damage is associated only with the damage energy release rate which is shown to be the elastic strain energy. According to this, damage is a function of the maximum amplitude of cyclic deformation but does not depend on the number of cycles. Therefore, low cycle effects are not taking into account. From the simplified model proposed by Flórez-López, it is the purpose of this paper to present a formulation that allows to take into account the degradation produced not only by the peak values but also by the cumulative effects such as the low cycle fatigue. For it, the classical damage dissipative potential based on the concept of damage energy release rate is modified using a fatigue function in order to include cumulative effects. The fatigue function is determined through parameters such as the cumulative rotation and the total rotation and the number of cycles to failure. Those parameters can be measured or identified physically through the haracteristics of the RC. So the main advantage of the proposed model is the possibility of simulating the low cycle fatigue behavior without introducing parameters with no suitable physical meaning. The good performance of the proposed model is shown through a comparison between numerical and test results under cycling loading.

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Depositado por: Biblioteca ETSI Industriales
Depositado el: 01 Ago 2013 10:16
Ultima Modificación: 21 Abr 2016 17:02
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