Moving loads : dynamic analysis and identification techniques /: dynamic analysis and identification techniques. (2011)

• Record Type: Book
• Further Information: Note: Siu-Seong Law, Xin-Qun Zhu.
• Authors: Law, Siu-Seong; Zhu, Xin-Qun
• Contents: Chapter 1 Introduction; 1.1 Overview; 1.2 Background of the Moving Load Problem; 1.3 Models for the Vehicle–Bridge System; 1.3.1 Continuous Beam under Moving Loads; 1.3.1.1 Moving Force, Moving Mass and Moving Oscillator; 1.3.1.2 Multi-span Beam; 1.3.1.3 Timoshenko Beam; 1.3.1.4 Beam with Crack; 1.3.1.5 Prestressed Beam; 1.3.2 Continuous Plate under Moving Loads; 1.3.2.1 Plate Models; 1.3.2.2 Moving Forces; 1.3.2.3 Quarter-truck Model; 1.3.2.4 Half-truck Model; 1.4 Dynamic Analysis of the Vehicle–Bridge System; 1.4.1 Methods based on Modal Superposition Technique; 1.4.2 Methods based on the Finite Element Method; 1.5 The Load Identification Techniques; 1.5.1 The Weigh-In-Motion Technique; 1.5.2 The Force Identification Techniques; 1.5.3 The Moving Force Identification Techniques; 1.6 Problem Statement on the Moving Load Identification; 1.7 Model Condensation Techniques; 1.8 Summary Part I – Moving Load Problems Chapter 2 Dynamic Response of Multi-span Continuous Beams under Moving Loads; 2.1 Introduction; 2.2 Multi-span Continuous Beam; 2.2.1 The Exact Solution; 2.2.1.1 Free Vibration; 2.2.1.2 Dynamic Behavior under Moving Loads; 2.2.2 Solution with Assumed Modes; 2.2.2.1 Assumed Modes for a Uniform Beam; 2.2.2.2 Assumed Modes for a Non-uniform Beam; 2.2.3 Precise Time Step Integration versus Newmark-Beta Method; 2.2.3.1 Newmark-Beta Method; 2.2.3.2 Precise Time Step Integration Method; 2.3 Multi-span Continuous Beam with Elastic Bearings; 2.3.1 Free Vibration; 2.3.2 Dynamic Behavior under Moving Loads; 2.4 Summary Chapter 3 Dynamic Response of Orthotropic Plates under Moving Loads; 3.1 Introduction; 3.2 Orthotropic Plates under Moving Loads; 3.2.1 Free Vibration; 3.2.2 Dynamic Behavior under Moving Loads; 3.2.3 Numerical Simulation; 3.2.3.1 Natural Frequency of Orthotropic Plates; 3.2.3.2 Simply Supported Beam-Slab Type Bridge Deck under Moving Loads; 3.3 Multi-span Continuous Orthotropic Plate under Moving Loads; 3.3.1 Dynamic Behavior under Moving Loads; 3.3.2 Modal Analysis of Multi-span Continuous Plates; 3.3.3 Numerical Examples; 3.4 Summary Chapter 4 Application of Vehicle–Bridge Interaction Dynamics; 4.1 Introduction; 4.2 Bridge Dynamic Response; 4.2.1 Vehicle and Bridge Models; 4.2.2 Vehicle–Bridge Interaction; 4.2.3 Road Surface Roughness; 4.2.4 Braking of Vehicle; 4.2.5 Computational Algorithm; 4.2.6 Numerical Simulation; 4.3 Dynamic Loads on Continuous Multi-Lane Bridge Decks from Moving Vehicles; 4.3.1 Bridge Model; 4.3.2 Vehicle Model; 4.3.3 Vehicle–Bridge Interaction; 4.4 Impact Factors; 4.4.1 Dynamic Loading from a Single Vehicle; 4.4.2 Dynamic Loading from Multiple Vehicles; 4.5 Summary Part II – Moving Load Identification Problems Chapter 5 Moving Force Identification in Frequency–Time Domain; 5.1 Introduction; 5.2 Moving Force Identification in Frequency–Time Domain; 5.2.1 Equation of Motion; 5.2.2 Identification from Accelerations; 5.2.3 Solution in Time Domain; 5.2.4 Identification from Bending Moments and Accelerations; 5.2.5 Regularization of the Solution; 5.3 Numerical Examples; 5.3.1 Single Force Identification; 5.3.2 Two Forces Identification; 5.4 Laboratory Experiments with Two Moving Loads; 5.4.1 Experimental Setup; 5.4.2 Experimental Procedure; 5.4.3 Experimental Results; 5.5 Summary Chapter 6 Moving Force Identification in Time Domain; 6.1 Introduction; 6.2 Moving Force Identification – The Time Domain Method (TDM); 6.2.1 Theory; 6.2.1.1 Equation of Motion and Modal Superposition; 6.2.1.2 Force Identification from Bending Moments; 6.2.1.3 Identification from Accelerations; 6.2.1.4 Identification from Bending Moments and Accelerations; 6.2.2 Simulation Studies; 6.2.3 Experimental Studies; 6.2.4 Discussions; 6.3 Moving Force Identification – Exact Solution Technique (EST); 6.3.1 Beam Model 125; 6.3.1.1 Identification from Strains; 6.3.1.2 Identification from Accelerations; 6.3.1.3 Statement of the Problem; 6.3.2 Plate Model; 6.3.2.1 Identification from Strains; 6.3.2.2 Identification from Accelerations; 6.3.2.3 Computation Algorithm; 6.3.3 Numerical Examples; 6.3.3.1 Beam Model; 6.3.3.2 Two-dimensional Plate Model; 6.3.4 Laboratory Studies; 6.3.4.1 Beam Model; 6.3.4.2 Plate Model; 6.4 Summary Chapter 7 Moving Force Identification in State Space; 7.1 Introduction; 7.2 Method I – Solution based on Dynamic Programming; 7.2.1 State–Space Model; 7.2.2 Formulation of Matrix G for Two Moving Loads Identification; 7.2.3 Problem Statement; 7.2.4 Computation Algorithm; 7.2.5 Numerical Examples; 7.2.5.1 Single-Force Identification; 7.2.5.2 Two-Forces Identification; 7.2.6 Experiment and Results; 7.2.6.1 Single-Force Identification ; 7.2.6.2 Two-Forces Identification; 7.2.7 Discussions on the Performance of Method I; 7.3 Method II – Solution based on Regularization Algorithm; 7.3.1 Discrete Time State–Space Model; 7.3.2 Moving Load Identification; 7.3.3 Numerical Studies; 7.3.3.1 Validation of Method II; 7.3.3.2 Study on the Effects of Sensor Type and Location; 7.3.3.3 Further Studies on the Sensor Location Effect and Velocity Measurement; 7.3.3.4 Effect of the Aspect Ratio of the Bridge Deck; 7.3.3.5 Further Studies on the Effect of Noise in Different Types of Measurements; 7.3.4 Experimental Studies; 7.3.4.1 Experimental Set-up; 7.3.4.2 Axle Loads and Wheel Loads Identification; 7.3.5 Comparison of the Two State–Space Approaches; 7.4 Summary Chapter 8 Moving Force Identification with Generalized Orthogonal Function Expansion; 8.1 Introduction; 8.2 Orthogonal Functions; 8.2.1 Series Expansion; 8.2.2 Generalized Orthogonal Function; 8.2.3 Wavelet Deconvolution; 8.3 Moving Force Identification; 8.3.1 Beam Model; 8.3.1.1 Generalized Orthogonal Function Expansion; 8.3.1.2 Moving Force Identification Theory; 8.3.2 Plate Model; 8.4 Applications; 8.4.1 Identification with a Beam Model; 8.4.1.1 Single-Span Beam; 8.4.1.2 Two-Span Continuous Beam; 8.4.2 Identification with a Plate Model; 8.4.2.1 Study on the Noise Effect; 8.4.2.2 Identification with Incomplete Modal Information; 8.4.2.3 Effects of Travel Path Eccentricity; 8.5 Laboratory Studies; 8.5.1 Beam Model; 8.5.1.1 Experimental Setup and Measurements; 8.5.1.2 Force Identification; 8.5.2 Plate Model; 8.5.2.1 Experimental Set-up; 8.5.2.2 Wheel Load Identification; 8.5.2.3 Effect of Unequal Number of Modes in the Response and in the Identification; 8.6 Summary Chapter 9 Moving Force Identification based on Finite Element Formulation; 9.1 Introduction; 9.2 Moving Force Identification; 9.2.1 Interpretive Method I; 9.2.1.1 Predictive Analysis; 9.2.1.2 Interpretive Analysis; 9.2.2 Interpretive Method II; 9.2.3 Regularization Method; 9.2.3.1 Equation of Motion; 9.2.3.2 Vehicle Axle Load Identification from Strain Measurements; 9.2.3.3 Regularization Algorithm; 9.3 Numerical Examples; 9.3.1 Effect of Discretization of the Structure and Sampling Rate; 9.3.2 Effect of Number of Sensors and Noise Level; 9.4 Laboratory Verification; 9.4.1 Experimental Set-up; 9.4.2 Identification from Measured Strains; 9.5 Comparative Studies; 9.5.1 Effect of Noise Level; 9.5.2 Effect of Modal Truncation; 9.5.3 Effect of Number of Measuring Points; 9.5.4 Effect of Sampling Frequency; 9.6 Summary Chapter 10 Application of Vehicle–Bridge Interaction Force Identification; 10.1 Merits and Disadvantages of Different Moving Force Identification Techniques; 10.2 Practical Issues on the Vehicle–Bridge Interaction Force Identification; 10.2.1 Bridge Weigh-In-Motion; 10.2.2 Moving Force Identification Techniques; 10.2.2.1 Access to Available Data; 10.2.2.2 Accuracy of Available Data; 10.3 Further Comparison of the FEM Formulation and the EST Method in the Vehicle–Bridge Interaction Identification; 10.3.1 Effect of Road Surface Roughness and Moving Speed &l
• Publisher Details: Boca Raton, Florida : CRC Press
• Publication Date: 2011
• Copyright Date: 2011
• Extent: 1 online resource (331 pages), illustrations
• Subjects: 624.1/72; Live loads; Structural dynamics; Live loads; Structural dynamics; Electronic books
• Languages: English
• ISBNs: 9780203841426; 0203841425
• Related ISBNs: 9780415878777
• Notes: Note: Includes bibliographical references.; Note: Print version record.
• Access Rights: Legal Deposit; Only available on premises controlled by the deposit library and to one user at any one time; The Legal Deposit Libraries (Non-Print Works) Regulations (UK).
• Access Usage: Restricted: Printing from this resource is governed by The Legal Deposit Libraries (Non-Print Works) Regulations (UK) and UK copyright law currently in force.