Advanced Vehicle Scanning Method : Bridge Modal Parameter Identification

• Autore: Xu Hao
• Pubblicazione: Newark : , : John Wiley & Sons, Incorporated, , 2025; ©2025
• Edizione: 1st ed.
• Descrizione fisica: 1 online resource (507 pages)
• Disciplina: 624.25
• Altri autori: YangDer-Shen YangYeong-Bin
• Nota di contenuto: Cover -- Title Page -- Copyright -- Contents -- Preface -- Acknowledgments -- List of Symbols -- List of Abbreviations -- Chapter 1 Introduction -- 1.1 Background -- 1.2 Basic Concept of the VSM for Bridges -- 1.2.1 Bridge Frequency Identification -- 1.2.2 Bridge Mode Shape Identification -- 1.2.3 Bridge Damping Ratio Identification -- 1.3 Brief on the Works Conducted by Yang and Coworkers -- 1.3.1 Vehicle and Bridge Models Used and Their Vibration Mechanisms -- 1.3.1.1 Vehicle Models -- 1.3.1.2 Bridge's Models and Properties -- 1.3.2 Enhanced Methods for Bridge Frequency Identification -- 1.3.2.1 Software‐Based Approaches -- 1.3.2.2 Hardware‐Based Approaches -- 1.3.3 Bridge Mode Shape Identification -- 1.3.4 Bridge Damping Ratio Identification -- 1.3.5 Bridge Damage Identification -- 1.3.6 Extension of VSM to Railway Tracks -- 1.4 Bridge Modal Parameter Identification by Researchers Worldwide -- 1.4.1 Bridge Frequency Identification -- 1.4.1.1 Vehicle and Bridge Models Used and Their Mechanism of Vibration -- 1.4.1.2 Time‐Varying Characteristics of the Vehicle-Bridge System -- 1.4.1.3 Enhanced Methods for Bridge Frequency Identification -- 1.4.2 Bridge Mode Shape Identification -- 1.4.2.1 HT‐Based Techniques -- 1.4.2.2 Time-Frequency Techniques -- 1.4.2.3 Other Mode Shape Identification Methods -- 1.4.3 Bridge Damping Ratio Identification -- 1.5 Bridge Damage Identification by Researchers Worldwide -- 1.5.1 Modal Parameter‐Based Methods -- 1.5.1.1 Natural Frequency‐Based Methods -- 1.5.1.2 Mode Shape‐Based Methods -- 1.5.2 Signal Processing‐Based Methods -- 1.5.3 Machine Learning‐Based Methods -- 1.5.4 Other Methods -- 1.6 Pavement Roughness Identification by Researchers Worldwide -- 1.7 Vehicle Scanning Method for Railway Tracks and Bridges -- 1.7.1 Track Geometry Estimation. ; 1.7.2 Identification of Dynamic Parameters of Railway Tracks and Bridges -- 1.7.3 Track Defect Detection -- 1.8 Application of Smartphone‐Based IoT System in VSM -- 1.9 Conclusions and Recommendations for Future Work -- 1.9.1 Conclusions -- 1.9.2 Challenges and Recommendations -- Part I Vehicle Scanning Method for Bridge Frequencies -- Chapter 2 Damped Scanning Vehicle for Bridge Frequencies: Theory and Experiment -- 2.1 Introduction -- 2.2 Formulation of the Analytical Theory -- 2.2.1 Dynamic Responses of the Bridge and Contact Point -- 2.2.2 Dynamic Response of the Test Vehicle -- 2.3 Calculation of Contact Response of the Damped Test Vehicle -- 2.3.1 Backward Calculation Procedure for the Contact Response -- 2.3.2 Transmissibility Between Contact Point and Vehicle Responses -- 2.4 Numerical Formulation of the Problem -- 2.4.1 Description of VBI Element for Single‐DOF Vehicle -- 2.4.2 Verification of Analytical Solution -- 2.5 Parametric Study -- 2.5.1 Effect of Vehicle Damping -- 2.5.2 Effect of Test Vehicle Speed -- 2.5.3 Effect of Environmental Noise -- 2.5.4 Effect of Surface Roughness -- 2.5.4.1 Scenario 1: Bridge Without Ongoing Traffic -- 2.5.4.2 Scenario 2: Bridge with Ongoing Traffic -- 2.6 Experimental Study -- 2.6.1 Brief on the Test Bridge -- 2.6.2 Measurement by Sensors Deployed on the Bridge Surface -- 2.6.3 Design of the Test Vehicle -- 2.6.4 Measurement by the Test Vehicle in the Nonmoving State -- 2.6.5 Flat Road Test for Vehicle Frequency in the Moving State -- 2.6.6 Measurement by the Test Vehicle in the Moving State -- 2.6.6.1 Scenario 1: Vehicle Moving Along the Bridge Centerline -- 2.6.6.2 Scenario 2: Vehicle Moving Along the Centerline with a Temporary Parking for 30 s -- 2.7 Concluding Remarks -- Chapter 3 Refined Detection for Bridge Frequencies: Theory and Experiment -- 3.1 Introduction. ; 3.2 Contact Responses for Two Wheels of Single‐Axle Vehicle -- 3.3 Brief on Test Bridge and Direct Measurement -- 3.4 Description of Self‐Designed Single‐Axle Test Vehicle -- 3.4.1 Properties of Single‐Axle Test Vehicle -- 3.4.2 Responses of Test Vehicle Moving over Flat Road -- 3.4.3 Contact Responses of Test Vehicle Moving on Flat Road -- 3.5 Scanning Bridge's Frequencies by Test Vehicle's Rocking Motion -- 3.5.1 Scenario 1: Test Vehicle Moving Nonstop over Bridge -- 3.5.1.1 Wheel Responses of Vehicle Moving over Bridge -- 3.5.1.2 Contact Responses of Test Vehicle's Wheels Moving over Bridge -- 3.5.2 Scenario 2: Vehicle Moving over Bridge with Temporary Stop -- 3.5.2.1 Wheel Responses of Moving Vehicle with Temporary Stop on Bridge -- 3.5.2.2 Contact Responses for Test Vehicle Moving over Bridge with Temporary Stop -- 3.6 Concluding Remarks -- Chapter 4 Single‐Axle Two‐Mass Scanning Vehicle for Bridge Frequencies: Theory -- 4.1 Introduction -- 4.2 Analytical Formulation of the Problem -- 4.2.1 Dynamic Responses of the Bridge and Contact Point -- 4.2.2 Dynamic Responses of the Vehicle's Body and Wheel -- 4.3 Vehicle-Bridge Contact Response of Two‐Mass Vehicle Model -- 4.3.1 Vehicle's Wheel Response Back‐Calculated from Body Response -- 4.3.2 Contact Response Back‐Calculated from Vehicle's Body and Wheel Responses -- 4.4 Numerical Simulation of the Problem -- 4.4.1 Description of Vehicle-Bridge Interaction Element -- 4.4.2 Verification of Analytical Solutions -- 4.4.3 Verification of Back‐Calculation Procedure for Vehicle's Wheel Response -- 4.4.4 Verification of Back‐Calculation Procedure for Contact Response -- 4.4.5 Applicability of the Contact Formula to Other Beam‐Type Bridges -- 4.5 Parametric Study -- 4.5.1 Effect of Vehicle Damping -- 4.5.2 Effect of Vehicle Speed -- 4.5.3 Effect of Environmental Noise -- 4.5.4 Effect of Pavement Roughness. ; 4.5.5 A More Realistic Condition -- 4.6 Concluding Remarks -- Chapter 5 Vehicle Scanning Method Enhanced by a Shaker -- 5.1 Introduction -- 5.2 Theoretical Modeling of the Problem -- 5.2.1 Dynamic Responses of the Bridge and Contact Point -- 5.2.2 Dynamic Response of the Test Vehicle -- 5.3 Dynamic Amplification Factor of the Shaker for Vehicle and Contact Responses -- 5.4 Numerical Verification -- 5.4.1 Verification of Analytical Solution -- 5.4.2 Verification of Back‐Calculated Contact Response -- 5.5 Effect of the Shaker on Bridge Frequency Extraction -- 5.5.1 Effect of Shaker Frequency -- 5.5.2 Effect of Shaker Location -- 5.5.3 Effect of Vehicle Speed -- 5.6 Effects of Pavement Roughness and Environmental Noise -- 5.7 Concluding Remarks -- Chapter 6 Vehicle Scanning Method Enhanced by Amplifiers -- 6.1 Introduction -- 6.2 Analytical Formulation of the Problem -- 6.2.1 Dynamic Responses of the Bridge -- 6.2.2 Dynamic Responses of the Amplifier and Test Vehicle -- 6.3 Effect of Amplifier on the Amplifier-Vehicle-Bridge System -- 6.3.1 Dynamic Amplification Factor of Amplifier for the Bridge Response -- 6.3.2 Dynamic Amplification Factor of Vehicle for the Bridge Response -- 6.3.3 Featured Range of Amplifier Response vs. Vehicle Response -- 6.3.4 Effect of Amplifier on Vehicle's Self‐Frequency -- 6.4 Numerical Simulation of the Problem -- 6.4.1 Brief of Amplifier-Vehicle-Bridge Interaction Element -- 6.4.2 Verification of Analytical Solutions -- 6.5 Test Vehicle Set in (or Not in) Resonance -- 6.6 Effect of Amplifier on Bridge Frequency Extraction -- 6.6.1 Effect of Amplifier Mass -- 6.6.2 Effect of Amplifier Frequency -- 6.6.3 Dual Amplifiers for the Bridge Frequencies -- 6.7 Effect of Pavement Roughness -- 6.7.1 Amplifier Frequency Tuned to Vehicle Frequency -- 6.7.2 Dual Amplifiers Tuned for Different Functions -- 6.8 Concluding Remarks. ; Part II Vehicle Scanning Method for Bridge Mode Shapes and Damping Ratios -- Chapter 7 Theory for Scanning Bridge Mode Shapes Using a Two‐Axle Vehicle -- 7.1 Introduction -- 7.2 Closed‐Form Solutions for Contact Responses -- 7.3 Calculation of Contact Responses for Two‐Axle Vehicle -- 7.4 Recovery of Bridge Mode Shapes -- 7.4.1 Brief on Variational Mode Decomposition -- 7.4.2 Recovery of Bridge's Mode Shape by Hilbert Transform -- 7.4.3 Procedure for Recovering Bridge Mode Shapes -- 7.5 Numerical Verification of Back‐Calculated Contact Responses -- 7.6 Construction of Bridge Mode Shapes -- 7.7 Parametric Study -- 7.7.1 Effect of Vehicle Damping -- 7.7.2 Effect of Vehicle Speed -- 7.7.3 Effect of Number of Bridge Spans -- 7.7.4 Effect of Environmental Noise -- 7.7.5 Effect of Pavement Roughness -- 7.8 Concluding Remarks -- Chapter 8 Formula for Determining Damping Ratio Using a Two‐Axle Vehicle -- 8.1 Introduction -- 8.2 Theoretical Formulation of the Problem -- 8.3 Determination of Bridge Damping Ratio -- 8.4 Numerical Verification -- 8.4.1 Verification of Analytical Solution -- 8.4.2 Verification of Back‐calculated Contact Response -- 8.4.3 Determination of Bridge Damping Ratio -- 8.5 Effect of Pavement Roughness -- 8.6 Concluding Remarks -- Chapter 9 Theory for Scanning Bridge Damping Ratios Using a Two‐Axle Vehicle by Wavelet Transform -- 9.1 Introduction -- 9.2 Analytical Formulation of the Problem -- 9.2.1 Closed‐form Solution for the Bridge -- 9.2.2 Closed‐form Solution for the Contact Responses -- 9.3 Calculation of Contact Responses for Two‐axle Vehicle Considering Suspension Effect -- 9.3.1 Wheel Responses Back‐calculated from Car Body's Responses -- 9.3.2 Contact Responses Back‐calculated from Vehicle's Body and Wheel Responses -- 9.4 Identification of Bridge Damping Ratio -- 9.4.1 Brief on the WT. ; 9.4.2 Identification of Bridge Damping Ratio by the WT.
• Sommario/riassunto: Framework for scanning modal parameters of bridges from vehicle responses utilizing the Vehicle Scanning Method (VSM) Advanced Vehicle Scanning Method: Bridge Modal Parameter Identification delivers a complete theoretical framework for scanning of the modal parameters (frequencies, damping ratios, and mode shapes) of bridges from vehicle responses. This book provides comprehensive coverage of the application of the Vehicle Scanning Method (VSM) for different types of bridges, which has the advantage of mobility, economy, and efficiency over the conventional, direct method. Most of the materials presented in each chapter have been published as technical papers in high-ranking international journals, which were subjected to critical reviews. The contents of the book have been arranged such that they are reflective of the progressive advancement of the VSM technique. Edited by a highly qualified team of authors including one of the original developers of the VSM technique, Advanced Vehicle Scanning Method includes information on: The theoretical basis for bridge frequency identification and scanning methods enhanced by software and hardware tools The damping formula for determining the bridge damping ratio from the spatial correlation of the front and rear wheels of a two-axle test vehicle The methods for removing the damping distortion effect on bridge mode shape recovery with no prior knowledge of bridge damping ratios The theoretical basis of scanning frequencies, damping ratios, and mode shapes using VSM for various types of bridges, such as curved bridges and thin-walled girders Advanced Vehicle Scanning Method is an essential reference on the subject for researchers working on bridge dynamics, graduate students in programs of study related to vehicle-bridge interaction, and practicing bridge engineers.
• Titolo autorizzato: Advanced Vehicle Scanning Method
• ISBN: 1-394-28605-8; 1-394-28606-6
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Lingua di pubblicazione: Inglese
• Record Nr.: 9911020201303321
• Lo trovi qui: Univ. Federico II