Dynamic Behavior Analysis and its Application in Tower Crane Structure Damage Identification

2011 ◽  
Vol 368-373 ◽  
pp. 2478-2482 ◽  
Author(s):  
Sheng Chun Wang ◽  
Rong Sheng Shen ◽  
Tong Hong Jin ◽  
Shi Jun Song
Keyword(s):  
Dynamic Load ◽  
Structural Damage ◽  
Damage Identification ◽  
Fem Model ◽  
Dynamic Displacement ◽  
Structure Damage ◽  
Tower Crane ◽  
Diagnosis Method ◽  
Damage Condition ◽  
Health Diagnosis

First establish a dynamic model of tower crane in the load lifting process, the lifting load is solved.Then establish the FEM model of the tower crane under the normal and the damage condition. Get the dynamic displacement of the normal and the damage status under the lifting dynamic load. Propose a damaged diagnosis method by the displacement rate. The results of the study show that this method can not only diagnose the structural damage status, but also determine the positions of structural damage. This will be a new search on tower crane structural health diagnosis.

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.

The Feasibility Study of Vibration Transmissibility Applied to Structure Damage Identification

2013 ◽  
Vol 347-350 ◽  
pp. 107-110
Author(s):  
Sen Wu ◽  
Bin Wang ◽  
Hai Hua Zhang
Keyword(s):  
Numerical Simulation ◽  
Cantilever Beam ◽  
Feasibility Study ◽  
Structural Damage ◽  
Simulation Experiment ◽  
Damage Identification ◽  
Structure Damage ◽  
Damage Location ◽  
Identification Method ◽  
Vibration Transmissibility

In view of the defects of the traditional damage identification method based on vibration,the damage identification method based on vibration transmissibility is put forward. The feasibility of the vibration transmissibility applied to structural damage identification is analyzed by the numerical simulation experiment of a cantilever beam, the analysis results show that, vibration transmissibility contains the structure damage severity, damage location and other useful information, and all the information is favor of the damage identification.

Research on Radial Basis Function Network Application in Steel Truss Girder Bridge Damage Identification

2014 ◽  
Vol 536-537 ◽  
pp. 352-355
Author(s):  
Zhong Hui Wang
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Radial Basis Function Network ◽  
New Method ◽  
Structure Damage ◽  
Steel Truss ◽  
Bridge Damage ◽  
Girder Bridge ◽  
Steel Truss Girder ◽  
Better Than

Damage alarm is an important step among structure damage identification. Its objective is to evaluate the structure health. the existing damage alarm methods are mostly based on BPNN without thinking over testing noise. Therefore, a new method based on hybrid algorithm RBFNN is proposed for structure damage alarm system in this paper. The experiment results of steel truss girder bridge show that the new method is better than BPNN for structural damage alarm.

Structural Damage Identification Method and Program Designing Based on Statistical Analysis

2013 ◽  
Vol 639-640 ◽  
pp. 283-286
Author(s):  
Zhuo Bin Wei ◽  
Ke Liu
Keyword(s):  
Structural Damage ◽  
Large Scale ◽  
Damage Identification ◽  
Constant Load ◽  
Structure Condition ◽  
Identification Method ◽  
Analysis Theory ◽  
Model Coefficient ◽  
Auto Regressive ◽  
Damage Condition

In order to realize the monitoring for the large-scale structures and find the change of its condition, a new damage feature factor is put forward. The damage feature factor is based on the PCA (principle component analysis) theory, analyzing the object of AR (Auto-regressive) model coefficient by the constant load, utilizing the theory of ellipse control figure. Then a program is designed combining the damage identification method with LabVIEW. Finally, an experiment is conducted on a steel frame model under different conditions. The results show that the first two principle components contain the main information of the structure condition, and the method can identify the changes of the structure condition correctly. Besides, the program works well and gives sound and light alarm under the damage condition.

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.

Damage Orientation Method Based on the Modal Kinetic Energy

2012 ◽  
Vol 256-259 ◽  
pp. 1112-1116 ◽  
Author(s):  
Hai Ping Meng ◽  
Xin Yan Lin
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Mass Matrix ◽  
Kinetic Method ◽  
Element Model ◽  
Structural Vibration ◽  
Modal Strain Energy ◽  
Orientation Method ◽  
Vibration Responses ◽  
Damage Condition

Dynamic methods by structural vibration responses and system dynamic characteristic parameters are the main methods for structural damage identification. Based on the modal strain energy method and used unit location matrix instead of element mass matrix, modal kinetic method is proposed. Two kinds of typical damage condition were simulated and the results show that the method can reduce structural finite element model accuracy, calculate simply and realize the initial damage location.

A Nonparametric Method for Identifying Structural Damage in Bridges Based on the Best-Fit Auto-Regressive Models

2020 ◽  
Vol 20 (10) ◽  
pp. 2042012
Author(s):  
Tung Khuc ◽  
Phat Tien Nguyen ◽  
Andy Nguyen ◽  
F. Necati Catbas
Keyword(s):  
Structural Damage ◽  
Damage Identification ◽  
Window Size ◽  
Information Criterion ◽  
Ar Model ◽  
Auto Regressive ◽  
Damage Condition ◽  
Two Parameters ◽  
Ar Models ◽  
Best Fit

An enhanced method to determine the best-fit auto-regressive model (AR model) for structural damage identification is proposed in this paper. Whereby, two parameters of the model, including the number of model order and the window size of data, are analyzed simultaneously in order to accomplish the optimized values by means of Akaike’s Information Criterion (AIC) algorithm. The damage condition of structures can be detected by defined damage indicators obtained from the first three AR coefficients of the best-fit AR models. The ability of the proposed damage identification method is compared with the process that only utilizes conventional AR models without concern of parameter selection. The proposed method is verified using experimental data previously collected from a large-size bridge structure in the Structural Laboratory at the University of Central Florida. The results indicate that this method can detect and locate damage more effectively.

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.

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.

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