Output-only damage detection using vehicle-induced displacement response and mode shape curvature index

2016 ◽  
Vol 23 (8) ◽  
pp. 1088-1107 ◽  
Author(s):  
Dongming Feng ◽  
Maria Q. Feng
Keyword(s):  
Damage Detection ◽  
Mode Shape ◽  
Displacement Response ◽  
Curvature Index ◽  
Output Only

scholarly journals Mode Shape-Based Damage Detection Method (MSDI): Experimental Validation

2021 ◽  
Vol 11 (10) ◽  
pp. 4589
Author(s):  
Ivan Duvnjak ◽  
Domagoj Damjanović ◽  
Marko Bartolac ◽  
Ana Skender
Keyword(s):  
Boundary Conditions ◽  
Damage Detection ◽  
Mode Shape ◽  
Experimental Validation ◽  
Detection Method ◽  
Dynamic Properties ◽  
Damage Index ◽  
Main Principle ◽  
The Difference ◽  
Different Levels

The main principle of vibration-based damage detection in structures is to interpret the changes in dynamic properties of the structure as indicators of damage. In this study, the mode shape damage index (MSDI) method was used to identify discrete damages in plate-like structures. This damage index is based on the difference between modified modal displacements in the undamaged and damaged state of the structure. In order to assess the advantages and limitations of the proposed algorithm, we performed experimental modal analysis on a reinforced concrete (RC) plate under 10 different damage cases. The MSDI values were calculated through considering single and/or multiple damage locations, different levels of damage, and boundary conditions. The experimental results confirmed that the MSDI method can be used to detect the existence of damage, identify single and/or multiple damage locations, and estimate damage severity in the case of single discrete damage.

Structural Damage Assessment Using Output-Only Measurement: Localization and Quantification

2013 ◽  
Author(s):  
Chin-Hsiung Loh ◽  
Min-Hsuan Tseng ◽  
Shu-Hsien Chao
Keyword(s):  
Damage Detection ◽  
Damage Assessment ◽  
Structural Damage ◽  
Damage Identification ◽  
Model Updating ◽  
Null Space ◽  
Singular Spectrum Analysis ◽  
Damage Index ◽  
Computation Efficiency ◽  
Output Only

One of the important issues to conduct the damage detection of a structure using vibration-based damage detection (VBDD) is not only to detect the damage but also to locate and quantify the damage. In this paper a systematic way of damage assessment, including identification of damage location and damage quantification, is proposed by using output-only measurement. Four level of damage identification algorithms are proposed. First, to identify the damage occurrence, null-space and subspace damage index are used. The eigenvalue difference ratio is also discussed for detecting the damage. Second, to locate the damage, the change of mode shape slope ratio and the prediction error from response using singular spectrum analysis are used. Finally, to quantify the damage the RSSI-COV algorithm is used to identify the change of dynamic characteristics together with the model updating technique, the loss of stiffness can be identified. Experimental data collected from the bridge foundation scouring in hydraulic lab was used to demonstrate the applicability of the proposed methods. The computation efficiency of each method is also discussed so as to accommodate the online damage detection.

Output-Only Subspace-Based Damage Detection - Application to a Reticular Structure

2003 ◽  
Vol 2 (2) ◽  
pp. 161-168 ◽  
Author(s):  
Michèle Basseville ◽  
Laurent Mevel ◽  
Antonio Vecchio ◽  
Bart Peeters ◽  
Herman Van der Auweraer
Keyword(s):  
Damage Detection ◽  
Reticular Structure ◽  
Output Only

Damage detection by mode shape squares extracted from a passing vehicle

2012 ◽  
Vol 331 (2) ◽  
pp. 291-307 ◽  
Author(s):  
Yao Zhang ◽  
Longqi Wang ◽  
Zhihai Xiang
Keyword(s):  
Damage Detection ◽  
Mode Shape

Output-only damage detection in buildings using proportional modal flexibility-based deflections in unknown mass scenarios

2018 ◽  
Vol 167 ◽  
pp. 549-566 ◽  
Author(s):  
Giacomo Bernagozzi ◽  
Suparno Mukhopadhyay ◽  
Raimondo Betti ◽  
Luca Landi ◽  
Pier Paolo Diotallevi
Keyword(s):  
Damage Detection ◽  
Modal Flexibility ◽  
Output Only
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