Abstract
This study investigates the damage localization employing the curvature of the lateral displacement envelope in shear building structures. Both the finite difference method and the proposed interpolation method are applied to evaluate the curvature of mode shapes and frequency response functions (FRFs) in a 12-story shear building. The interpolated displacement function used in the proposed method considers appropriate continuity and boundary conditions for the shear buildings. Numerical studies show that using the curvature by the proposed method could reduce the occurrences of false damage localization when the vibration responses include small simulated noise. Moreover, the existing FRF curvature method could perform worse than random guessing to find correct damage locations at the cost of the considerable number of false alarms. However, the poor detection performance of the existing method may be enhanced significantly by using the proposed method to evaluate the curvature of the FRFs if the simulated noise is under a small level. The proposed method is shown to perform better than the finite difference method to improve the effectiveness of the curvature-based methods for damage detection.
| Original language | English (US) |
|---|---|
| Article number | e2050 |
| Journal | Structural Control and Health Monitoring |
| Volume | 25 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2018 |
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Keywords
- ROC curves
- damage localization
- displacement function
- frequency response function
- modal response
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
Cite this
Damage detection in shear buildings using different estimated curvature. / Shi, Jun Yang; Spencer, Billie F.; Chen, Shi Shuenn.
In: Structural Control and Health Monitoring, Vol. 25, No. 1, e2050, 01.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Damage detection in shear buildings using different estimated curvature
AU - Shi, Jun Yang
AU - Spencer, Billie F.
AU - Chen, Shi Shuenn
PY - 2018/1
Y1 - 2018/1
N2 - This study investigates the damage localization employing the curvature of the lateral displacement envelope in shear building structures. Both the finite difference method and the proposed interpolation method are applied to evaluate the curvature of mode shapes and frequency response functions (FRFs) in a 12-story shear building. The interpolated displacement function used in the proposed method considers appropriate continuity and boundary conditions for the shear buildings. Numerical studies show that using the curvature by the proposed method could reduce the occurrences of false damage localization when the vibration responses include small simulated noise. Moreover, the existing FRF curvature method could perform worse than random guessing to find correct damage locations at the cost of the considerable number of false alarms. However, the poor detection performance of the existing method may be enhanced significantly by using the proposed method to evaluate the curvature of the FRFs if the simulated noise is under a small level. The proposed method is shown to perform better than the finite difference method to improve the effectiveness of the curvature-based methods for damage detection.
AB - This study investigates the damage localization employing the curvature of the lateral displacement envelope in shear building structures. Both the finite difference method and the proposed interpolation method are applied to evaluate the curvature of mode shapes and frequency response functions (FRFs) in a 12-story shear building. The interpolated displacement function used in the proposed method considers appropriate continuity and boundary conditions for the shear buildings. Numerical studies show that using the curvature by the proposed method could reduce the occurrences of false damage localization when the vibration responses include small simulated noise. Moreover, the existing FRF curvature method could perform worse than random guessing to find correct damage locations at the cost of the considerable number of false alarms. However, the poor detection performance of the existing method may be enhanced significantly by using the proposed method to evaluate the curvature of the FRFs if the simulated noise is under a small level. The proposed method is shown to perform better than the finite difference method to improve the effectiveness of the curvature-based methods for damage detection.
KW - ROC curves
KW - damage localization
KW - displacement function
KW - frequency response function
KW - modal response
UR - http://www.scopus.com/inward/record.url?scp=85019924505&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85019924505&partnerID=8YFLogxK
U2 - 10.1002/stc.2050
DO - 10.1002/stc.2050
M3 - Article
AN - SCOPUS:85019924505
VL - 25
JO - Structural Control and Health Monitoring
JF - Structural Control and Health Monitoring
SN - 1545-2255
IS - 1
M1 - e2050
ER -