Modelization of low cycle fatigue damage in frames

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

Description

Title: Modelization of low cycle fatigue damage in frames
Author/s:
  • Perera Velamazán, Ricardo
  • Alarcón Álvarez, Enrique
  • Carnicero, Alberto
Item Type: Presentation at Congress or Conference (Article)
Event Title: 12th World Conference on Earthquake Engineering
Event Dates: 30/01/2000-04/02/2000
Event Location: Auckland, New Zeland
Title of Book: 12 WCEE 2000 : 12th World Conference on Earthquake Engineering; Auckland, New Zeland, Sunday 30 January - Friday 4 February 2000
Date: 2000
ISBN: 0958215448
Volume: 1
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Mecánica Estructural y Construcciones Industriales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 16672
DC Identifier: http://oa.upm.es/16672/
OAI Identifier: oai:oa.upm.es:16672
Official URL: http://www.nzsee.org.nz/
Deposited by: Biblioteca ETSI Industriales
Deposited on: 01 Aug 2013 10:16
Last Modified: 21 Apr 2016 17:02
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