Abstract
Suspender cables are one of the most vulnerable components of a suspension bridge; therefore, development of effective methods for damage detection is imperative. Many previous damage detection methods require an accurate finite element model, which is often difficult to obtain. This article proposes a model-free test method for damage diagnosis of suspender cables that avoids this problem. The method includes two procedures: the mean normalized curvature difference procedure and the curvature difference probability procedure. Numerical results for single and multiple damage cases indicate that: (1) both procedures can be effective for damage diagnosis of suspender cables; (2) small damage can be more easily diagnosed in long suspender cables than short ones, for example, 5% stiffness reduction in long suspender cables can be diagnosed; and (3) noise is generally not a problem, because the signal-to-noise ratio can be improved by increasing the pulse excitation magnitude for a suspender cable. The proposed test method does not eliminate the need for manual inspection, but changes it from observation to a more quantified method. All of these points increase the potential of the proposed method for practical applications.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 771-784 |
| Number of pages | 14 |
| Journal | Computer-Aided Civil and Infrastructure Engineering |
| Volume | 30 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 1 2015 |
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ASJC Scopus subject areas
- Civil and Structural Engineering
- Computer Science Applications
- Computer Graphics and Computer-Aided Design
- Computational Theory and Mathematics
Cite this
A Test Method for Damage Diagnosis of Suspension Bridge Suspender Cables. / An, Yonghui; Spencer, B. F.; Ou, Jinping.
In: Computer-Aided Civil and Infrastructure Engineering, Vol. 30, No. 10, 01.10.2015, p. 771-784.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A Test Method for Damage Diagnosis of Suspension Bridge Suspender Cables
AU - An, Yonghui
AU - Spencer, B. F.
AU - Ou, Jinping
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Suspender cables are one of the most vulnerable components of a suspension bridge; therefore, development of effective methods for damage detection is imperative. Many previous damage detection methods require an accurate finite element model, which is often difficult to obtain. This article proposes a model-free test method for damage diagnosis of suspender cables that avoids this problem. The method includes two procedures: the mean normalized curvature difference procedure and the curvature difference probability procedure. Numerical results for single and multiple damage cases indicate that: (1) both procedures can be effective for damage diagnosis of suspender cables; (2) small damage can be more easily diagnosed in long suspender cables than short ones, for example, 5% stiffness reduction in long suspender cables can be diagnosed; and (3) noise is generally not a problem, because the signal-to-noise ratio can be improved by increasing the pulse excitation magnitude for a suspender cable. The proposed test method does not eliminate the need for manual inspection, but changes it from observation to a more quantified method. All of these points increase the potential of the proposed method for practical applications.
AB - Suspender cables are one of the most vulnerable components of a suspension bridge; therefore, development of effective methods for damage detection is imperative. Many previous damage detection methods require an accurate finite element model, which is often difficult to obtain. This article proposes a model-free test method for damage diagnosis of suspender cables that avoids this problem. The method includes two procedures: the mean normalized curvature difference procedure and the curvature difference probability procedure. Numerical results for single and multiple damage cases indicate that: (1) both procedures can be effective for damage diagnosis of suspender cables; (2) small damage can be more easily diagnosed in long suspender cables than short ones, for example, 5% stiffness reduction in long suspender cables can be diagnosed; and (3) noise is generally not a problem, because the signal-to-noise ratio can be improved by increasing the pulse excitation magnitude for a suspender cable. The proposed test method does not eliminate the need for manual inspection, but changes it from observation to a more quantified method. All of these points increase the potential of the proposed method for practical applications.
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U2 - 10.1111/mice.12144
DO - 10.1111/mice.12144
M3 - Article
AN - SCOPUS:84940791990
VL - 30
SP - 771
EP - 784
JO - Computer-Aided Civil and Infrastructure Engineering
JF - Computer-Aided Civil and Infrastructure Engineering
SN - 1093-9687
IS - 10
ER -