Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33707
Title: Reconstructing interfacial force distribution for identification of multi-debonding in steel-reinforced concrete structures using noncontact laser vibrometry
Authors: Xu, H
Su, Z 
Cheng, L 
Guyader, JL
Hamelin, P
Keywords: Data fusion
Debonding
Denoising
Local dynamic equilibrium
Noncontact laser vibrometry
Steel-reinforced concrete
Structural health monitoring
Issue Date: 2013
Source: Structural health monitoring, 2013, v. 12, no. 5-6, p. 507-521 How to cite?
Journal: Structural Health Monitoring 
Abstract: Interfacial debonding in multilayered engineering structures can jeopardize the structural integrity without timely awareness. By reconstructing the distribution of interfacial forces and canvassing local perturbance to the structural dynamic equilibrium, an identification approach for interfacial debonding between different structural components was developed. A "debonding index," governed by the derivatives of reconstructed interfacial forces, was established, able to predict debonding in a quantitative manner including the coexistence of multi-debonding and their individual locations and sizes. The index offers the flexibility of detecting debonding between a beam-like component and its neighboring constituents of any type (beam, plate, shell, or even more complex components) with distinct material properties. To enhance the robustness of the approach under noisy measurement conditions, two denoising techniques (low-pass wavenumber filtering and adjustment of measurement density), together with a data fusion algorithm, were proposed. Using a noncontact laser vibrometry, the approach was validated experimentally by identifying multiple debonding zones in a steel-reinforced concrete slab dismantled from a bridge model. The approach has been demonstrated sensitive to debonding of small dimension owing to the use of high-order differential equation of motion. In addition, it does not require a global model of the entire system, prior information on structural boundaries, benchmark, baseline signals, and additional excitation sources as long as the structure undergoes steady vibration.
URI: http://hdl.handle.net/10397/33707
ISSN: 1475-9217
DOI: 10.1177/1475921713502837
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

15
Last Week
0
Last month
2
Citations as of Sep 24, 2017

WEB OF SCIENCETM
Citations

13
Last Week
0
Last month
0
Citations as of Sep 23, 2017

Page view(s)

44
Last Week
0
Last month
Checked on Sep 24, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.