Paper Title:
Damage Detection in Beam-Like Structures Using Deflections Obtained by Modal Flexibility Matrices
  Abstract

In bridge structures, damage may induce an additional deflection which may naturally contain essential information about the damage. However, inverse mapping from the damage-induced deflection to the actual damage location and severity is generally complex, particularly for statically indeterminate systems. In this paper, a new load concept, called the positive-bending-inspection-load (PBIL) is proposed to construct a simple inverse mapping from the damage-induced deflection to the actual damage location. A PBIL for an inspection region is defined as a load or a system of load which guarantees bending moment to be positive in the inspection region. From the theoretical investigations, it was proven that the damage-induced chord-wise deflection (DI-CD) has the maximum value with the abrupt change in its slope at the damage location under a PBIL. Hence, a novel damage localization method is proposed based on the DI-CD under a PBIL. Experimental verification study was also carried out on a two-span continuous steel box-girder model with a steel box-girder. It was found that the proposed method clearly identified the damage existence and damage location for small damage cases with narrow cuts at the bottom flange.

  Info
Periodical
Edited by
Pietro VINCENZINI and Fabio CASCIATI
Pages
483-488
DOI
10.4028/www.scientific.net/AST.56.483
Citation
K. Y. Koo, J. J. Lee, C. B. Yun, J. T. Kim, "Damage Detection in Beam-Like Structures Using Deflections Obtained by Modal Flexibility Matrices ", Advances in Science and Technology, Vol. 56, pp. 483-488, 2008
Online since
September 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhe Feng Yu, Zhi Chun Yang
Abstract:A new method for structural damage detection based on the Cross Correlation Function Amplitude Vector (CorV) of the measured vibration...
2317
Authors: Fei Zheng, Jin Yu Xu, Yong Chen, De Hui Zhao
Abstract:Underground arch structure is an important structure form of civil air defense engineering, and its damage detection is an important link in...
2576
Authors: Long Qiao, Asad Esmaeily
Chapter 2: Monitoring and Control of Structures
Abstract:Deterioration of structures due to aging, cumulative crack growth or excessive response significantly affects the performance and safety of...
834
Authors: You Bao Jiang, Guo Yu Liao
Chapter 1: Vibration Engineering
Abstract:Modal parameters are widely adopted to identify structural damages. This paper explores the mode jumping problems in damage identification...
307
Authors: M. O. Abdalla, E. Al-Khawaldeh
Chapter 23: Computer-Aided Design, Manufacturing, and Engineering
Abstract:An optimal damage detection sensor placement methodology is presented. The techniques utilize a Particle Swarm Optimization (PSO) algorithm....
5336