Damage identification of a reinforced concrete frame by finite element model updating using damage parameterization

Fang, Sheng-En and Perera Velamazán, Ricardo and De Roeck, Guido (2008). Damage identification of a reinforced concrete frame by finite element model updating using damage parameterization. "Journal Of Sound And Vibration", v. 313 (n. 3); pp. 544-559. ISSN 0022-460X. https://doi.org/10.1016/j.jsv.2007.11.057.

Description

Title: Damage identification of a reinforced concrete frame by finite element model updating using damage parameterization
Author/s:
  • Fang, Sheng-En
  • Perera Velamazán, Ricardo
  • De Roeck, Guido
Item Type: Article
Título de Revista/Publicación: Journal Of Sound And Vibration
Date: June 2008
ISSN: 0022-460X
Volume: 313
Subjects:
Freetext Keywords: Damage identification, finite element, parameterization
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

This paper develops a sensitivity-based updating method to identify the damage in a tested reinforced concrete (RC) frame modeled with a two-dimensional planar finite element (FE) by minimizing the discrepancies of modal frequencies and mode shapes. In order to reduce the number of unknown variables, a bidimensional damage (element) function is proposed, resulting in a considerable improvement of the optimization performance. For damage identification, a reference FE model of the undamaged frame divided into a few damage functions is firstly obtained and then a rough identification is carried out to detect possible damage locations, which are subsequently refined with new damage functions to accurately identify the damage. From a design point of view, it would be useful to evaluate, in a simplified way, the remaining bending stiffness of cracked beam sections or segments. Hence, an RC damage model based on a static mechanism is proposed to estimate the remnant stiffness of a cracked RC beam segment. The damage model is based on the assumption that the damage effect spreads over a region and the stiffness in the segment changes linearly. Furthermore, the stiffness reduction evaluated using this damage model is compared with the FE updating result. It is shown that the proposed bidimensional damage function is useful in producing a well-conditioned optimization problem and the aforementioned damage model can be used for an approximate stiffness estimation of a cracked beam segment.

More information

Item ID: 3038
DC Identifier: http://oa.upm.es/3038/
OAI Identifier: oai:oa.upm.es:3038
DOI: 10.1016/j.jsv.2007.11.057
Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/622899/description#description
Deposited by: Memoria Investigacion
Deposited on: 10 May 2010 08:26
Last Modified: 20 Apr 2016 12:37
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