Study on Structural Damage Identification Based on Wavelet Analysis

2011 ◽  
Vol 374-377 ◽  
pp. 2588-2592
Author(s):  
Chun Ling Zhang ◽  
Hai Qing Liu
Keyword(s):  
Wavelet Analysis ◽  
Structural Damage ◽  
Damage Identification ◽  
Information Analysis ◽  
Structural Dynamic ◽  
Scale Theory ◽  
Structure Damage ◽  
Multi Scale ◽  
Structural Damage Identification ◽  
Domain Information

This papers deals with wavelet analysis which is as a tool for the complexity of structural damage combing the multi-scale theory and pattern recognition idea. The main subject is as follows multi-scale damage information analysis and numerical simulation and model experiments which is based on wavelet analysis for structural damage identification study. Applying wavelet transform, differential eqution of structural dynamic system are decomposed and dynamic parameters are described on different scales, the dentification of structure damage location is also spatial domain information which determines in the structural damage.

Review on Damage Identification and Diagnosis Research of Civil Engineering Structure

2014 ◽  
Vol 1006-1007 ◽  
pp. 34-37 ◽  
Author(s):  
Hong Ni ◽  
Ming Hui Li ◽  
Xi Zuo
Keyword(s):  
Structural Damage ◽  
Civil Engineering ◽  
Damage Identification ◽  
Engineering Structures ◽  
Engineering Structure ◽  
Civil Engineering Structure ◽  
Structure Damage ◽  
Development Direction ◽  
Structural Damage Identification ◽  
Civil Engineering Structures

This paper first describes the importance of structural damage identification and diagnosis in civil engineering, and introduces domestic and foreign status of damage identification and diagnosis methods, and on the basis of this, it also introduces all kinds of methods for damage identification and diagnosis of civil engineering structures, and finally puts forward the development direction of civil engineering structure damage identification and diagnosis.

Structural Damage Identification Method Based on Displacement Data

2014 ◽  
Vol 610 ◽  
pp. 241-245
Author(s):  
Hong Yue Sun ◽  
Fan Wen
Keyword(s):  
Finite Element ◽  
Structural Damage ◽  
Model Building ◽  
Damage Identification ◽  
Measurement Data ◽  
Structure Model ◽  
Structure Damage ◽  
Finite Element Software ◽  
Structural Damage Identification ◽  
Identification Theory

Structural damage identification is a hot research topic in the field of building structural health monitoring, according to the problem of building structural damage is difficult to accurately identify, conducting the research of the abnormal monitoring data. In the summary and the research on the basis of the current domestic construction structure damage identification theory, this paper proposes a combined with finite element method based on displacement measurement data of structural damage identification methods, verified by the structure model building in PKPM finite element software, the method has higher recognition accuracy and operability and effectiveness.

The Damage Identification of Multilayer Frame Structure Containing Sheet Crack by Wavelet Analysis

2012 ◽  
Vol 193-194 ◽  
pp. 1001-1004
Author(s):  
De Qing Guan ◽  
Liang Liu
Keyword(s):  
Wavelet Analysis ◽  
Structural Damage ◽  
Damage Identification ◽  
Frame Structure ◽  
The Finite Element Method ◽  
Damage Diagnosis ◽  
Structure Damage ◽  
Analysis Theory ◽  
Modulus Maxima ◽  
Calculation Analysis

In this paper, the multilayer frame structure containing sheet crack was researched. Based on wavelet analysis theory, the finite element method was applied to analyze the dynamic characteristics of structural damage. Established a method about the identification of containing sheet crack frame structure by modulus maxima of wavelet coefficients to determine the location of the crack, it verifies the validity of the method through calculation analysis of damage identification to a two layers of a cross frame structure containing sheet crack. The conclusions of this paper can be used for frame structure damage diagnosis application reference.

A Hybrid Procedure for Structural Damage Identification in Beam-Like Structures Using Wavelet Analysis

2015 ◽  
Vol 18 (11) ◽  
pp. 1901-1913 ◽  
Author(s):  
Seyed Alireza Ravanfar ◽  
Hashim Abdul Razak ◽  
Zubaidah Ismail ◽  
S.J.S Hakim
Keyword(s):  
Wavelet Analysis ◽  
Structural Damage ◽  
Damage Identification ◽  
Hybrid Procedure ◽  
Structural Damage Identification

Comparison of Analytical Approaches to Tall Building Structural Damage Identification Based on Measured Dynamic Characteristics

2011 ◽  
Vol 105-107 ◽  
pp. 1081-1086
Author(s):  
Jian Jun Wei
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Element Model ◽  
Shaking Table ◽  
Structure Damage ◽  
Damage Indices ◽  
Structural Damage Identification ◽  
Four Levels ◽  
Analytical Approaches ◽  
Story Building

In the past two decades, there are many modal-based indices have been proposed for structural damage identification. In the present study, a modal of a 38-story building was tested on a shaking table to subject to four levels of earthquake, and the acceleration responses at nine floors of the structure are measured and used to construct five damage indices respectively. The experiment makes it possible to verify the applicability of vibration-based identification methods in identifying structure damage without use of structural finite element model. Damage in the structure after experiencing different attacks is evaluated via five modal-based damage indices respectively .By comparing the solution of above indices, it is concluded that the five modal-based indices didn’t have consistency in the identifying and localizing the seismic damage.

Optimal Sensor Placement Algorithm for Structural Damage Identification

2020 ◽  
Vol 14 (1) ◽  
pp. 69-81
Author(s):  
C.H. Li ◽  
Q.W. Yang
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Sensor Placement ◽  
Optimization Procedure ◽  
Frame Structure ◽  
Truss Structures ◽  
Optimal Sensor Placement ◽  
Structural Damage Identification ◽  
Placement Algorithm ◽  
Sensor Locations

Background: Structural damage identification is a very important subject in the field of civil, mechanical and aerospace engineering according to recent patents. Optimal sensor placement is one of the key problems to be solved in structural damage identification. Methods: This paper presents a simple and convenient algorithm for optimizing sensor locations for structural damage identification. Unlike other algorithms found in the published papers, the optimization procedure of sensor placement is divided into two stages. The first stage is to determine the key parts in the whole structure by their contribution to the global flexibility perturbation. The second stage is to place sensors on the nodes associated with those key parts for monitoring possible damage more efficiently. With the sensor locations determined by the proposed optimization process, structural damage can be readily identified by using the incomplete modes yielded from these optimized sensor measurements. In addition, an Improved Ridge Estimate (IRE) technique is proposed in this study to effectively resist the data errors due to modal truncation and measurement noise. Two truss structures and a frame structure are used as examples to demonstrate the feasibility and efficiency of the presented algorithm. Results: From the numerical results, structural damages can be successfully detected by the proposed method using the partial modes yielded by the optimal measurement with 5% noise level. Conclusion: It has been shown that the proposed method is simple to implement and effective for structural damage identification.

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