Muutke küpsiste eelistusi

E-raamat: Moving Loads Dynamic Analysis and Identification Techniques: Structures and Infrastructures Book Series, Vol. 8 [Taylor & Francis e-raamat]

(University of Western Sydney, Australia), (Hong Kong Polytechnic University, Hong Kong)
  • Formaat: 332 pages, 18 Tables, black and white; 70 Line drawings, black and white; 5 Halftones, black and white
  • Sari: Structures and Infrastructures
  • Ilmumisaeg: 18-Feb-2011
  • Kirjastus: CRC Press
  • ISBN-13: 9780429206153
Teised raamatud teemal:
  • Taylor & Francis e-raamat
  • Hind: 304,67 €*
  • * hind, mis tagab piiramatu üheaegsete kasutajate arvuga ligipääsu piiramatuks ajaks
  • Tavahind: 435,24 €
  • Säästad 30%
Moving Loads Dynamic Analysis and Identification Techniques: Structures and Infrastructures Book Series, Vol. 8Suurem pilt
  • Formaat: 332 pages, 18 Tables, black and white; 70 Line drawings, black and white; 5 Halftones, black and white
  • Sari: Structures and Infrastructures
  • Ilmumisaeg: 18-Feb-2011
  • Kirjastus: CRC Press
  • ISBN-13: 9780429206153
Teised raamatud teemal:
Taylor & Francis e-raamatudRohkem infot Taylor & Francis e-raamatute kohta
Raamatu kodulehekülg: https://www.taylorfrancis.com/books/9780429206153
"Moving load problems occur in a wide variety of applications: rail mechanics, dynamics of computer tapes, floppy and hard discs, automotive and aircraft braking systems, belt drives, web winding and transport. Some typical moving load problems are the vibration of track, bridge or ground excitation from travelling vehicles, and noise and vibration from spinning computer hard discs and during machining processes in manufacturing. As modern lightweight and high strength materials continue to be very popular in engineering, it is expected that vibration and instabilities problems due to moving loads will remain important. This volume treats the fundamentals of moving loads problems with accurate identification and computational efficiency. It starts with detailed descriptions of the dynamic behavior of continuous beam, beam-slab type bridge deck and multi-box spline bridge decks under the passage of moving loads. The second part addresses moving load identification problems with both simple methods for universal application and with specialized techniques. A final chapter treats problems associated with the practical application of moving load identification techniques"--

"Moving load problems occur in a wide variety of applications: rail mechanics, dynamics of computer tapes, floppy and hard discs, automotive and aircraft braking systems, belt drives, web winding and transport. Some typical moving load problems are the vibration of track, bridge or ground excitation from travelling vehicles, and noise and vibration from spinning computer hard discs and during machining processes in manufacturing. As modern lightweight and high strength materials continue to be very popular in engineering, it is expected that vibration and instabilities problems due to moving loads will remain important. This volume treats the fundamentals of moving loads problems with accurate identification and computational efficiency. It starts with detailed descriptions of the dynamic behavior of continuous beam, beam-slab type bridge deck and multi-box spline bridge decks under the passage of moving loads. The second part addresses moving load identification problems with both simple methods for universal application and with specialized techniques. A final chapter treats problems associated with the practical application of moving load identification techniques"--



The interaction phenomenon is very common between different components of a mechanical system. It is a natural phenomenon and is found with the impact force in aircraft landing; the estimation of degree of ripeness of an apple from impact on a beam; the interaction of the magnetic head of a computer disk leading to miniature development of modern computer; etc. Uncertainty in some of them would lead to inaccurate analysis results on the behavior of the structure. The interaction force is difficult to measure unless instruments have been installed during construction for this purpose. Some of the interaction problems are difficult to quantify due to the lack of thorough knowledge on the interaction behavior. Analytical skills are required to estimate the interaction forces of the mechanical system in order to enable advanced developments in different areas of modern technology.

This volume provides a comprehensive treatment on this topic with the vehicle-bridge system for an illustration of the moving load problem. It covers a whole range of topics, including mathematical concepts of the moving load problems with continuous beams and plates, vehicle-bridge interaction dynamics, weigh-in-motion techniques, moving load identification algorithms in the frequency-time domain, in the time domain and in the state space domain, techniques based on the generalized orthogonal function expansion and on the finite element formulation. The methods and algorithms can be implemented for on-line identification of the interaction forces.

This book is intended for structural engineers and advanced students who wish to explore the benefit of interaction phenomenon and techniques for identification of such interaction forces. It is also recommended for researchers and decision makers working on the operation and maintenance of major infrastructures and engineering facilities.

Editorial XI
About the Book Series Editor XIII
Preface XV
Dedication XIX
Acknowledgements XXI
About the Authors XXIII
Chapter 1 Introduction 1(26)
1.1 Overview
1(1)
1.2 Background of the Moving Load Problem
1(2)
1.3 Models for the Vehicle–Bridge System
3(6)
1.3.1 Continuous Beam under Moving Loads
3(3)
1.3.1.1 Moving Force, Moving Mass and Moving Oscillator
3(1)
1.3.1.2 Multi-span Beam
4(1)
1.3.1.3 Timoshenko Beam
5(1)
1.3.1.4 Beam with Crack
5(1)
1.3.1.5 Prestressed Beam
6(1)
1.3.2 Continuous Plate under Moving Loads
6(3)
1.3.2.1 Plate Models
7(1)
1.3.2.2 Moving Forces
7(1)
1.3.2.3 Quarter-truck Model
8(1)
1.3.2.4 Half-truck Model
8(1)
1.4 Dynamic Analysis of the Vehicle–Bridge System
9(3)
1.4.1 Methods based on Modal Superposition Technique
9(1)
1.4.2 Methods based on the Finite Element Method
10(2)
1.5 The Load Identification Techniques
12(5)
1.5.1 The Weigh-In-Motion Technique
12(1)
1.5.2 The Force Identification Techniques
13(1)
1.5.3 The Moving Force Identification Techniques
14(3)
1.6 Problem Statement on the Moving Load Identification
17(3)
1.7 Model Condensation Techniques
20(4)
1.8 Summary
24(3)
Part I Moving Load Problems
Chapter 2 Dynamic Response of Multi-span Continuous Beams under Moving Loads
27(18)
2.1 Introduction
27(1)
2.2 Multi-span Continuous Beam
27(12)
2.2.1 The Exact Solution
28(3)
2.2.1.1 Free Vibration
28(2)
2.2.1.2 Dynamic Behavior under Moving Loads
30(1)
2.2.2 Solution with Assumed Modes
31(4)
2.2.2.1 Assumed Modes for a Uniform Beam
34(1)
2.2.2.2 Assumed Modes for a Non-uniform Beam
34(1)
2.2.3 Precise Time Step Integration versus Newmark-Beta Method
35(4)
2.2.3.1 Newmark-Beta Method
35(1)
2.2.3.2 Precise Time Step Integration Method
36(3)
2.3 Multi-span Continuous Beam with Elastic Bearings
39(5)
2.3.1 Free Vibration
41(2)
2.3.2 Dynamic Behavior under Moving Loads
43(1)
2.4 Summary
44(1)
Chapter 3 Dynamic Response of Orthotropic Plates under Moving Loads
45(14)
3.1 Introduction
45(1)
3.2 Orthotropic Plates under Moving Loads
45(9)
3.2.1 Free Vibration
45(4)
3.2.2 Dynamic Behavior under Moving Loads
49(1)
3.2.3 Numerical Simulation
50(4)
3.2.3.1 Natural Frequency of Orthotropic Plates
50(1)
3.2.3.2 Simply Supported Beam-Slab Type Bridge Deck under Moving Loads
50(4)
3.3 Multi-span Continuous Orthotropic Plate under Moving Loads
54(4)
3.3.1 Dynamic Behavior under Moving Loads
55(1)
3.3.2 Modal Analysis of Multi-span Continuous Plates
56(2)
3.3.3 Numerical Examples
58(1)
3.4 Summary
58(1)
Chapter 4 Application of Vehicle–Bridge Interaction Dynamics
59(32)
4.1 Introduction
59(1)
4.2 Bridge Dynamic Response
59(16)
4.2.1 Vehicle and Bridge Models
60(1)
4.2.2 Vehicle–Bridge Interaction
60(5)
4.2.3 Road Surface Roughness
65(1)
4.2.4 Braking of Vehicle
65(1)
4.2.5 Computational Algorithm
66(1)
4.2.6 Numerical Simulation
66(9)
4.3 Dynamic Loads on Continuous Multi-Lane Bridge Decks from Moving Vehicles
75(4)
4.3.1 Bridge Model
76(1)
4.3.2 Vehicle Model
76(2)
4.3.3 Vehicle—Bridge Interaction
78(1)
4.4 Impact Factors
79(9)
4.4.1 Dynamic Loading from a Single Vehicle
80(5)
4.4.2 Dynamic Loading from Multiple Vehicles
85(3)
4.5 Summary
88(3)
Part II Moving Load Identification Problems
Chapter 5 Moving Force Identification in Frequency—Time Domain
91(22)
5.1 Introduction
91(1)
5.2 Moving Force Identification in Frequency—Time Domain
91(8)
5.2.1 Equation of Motion
91(2)
5.2.2 Identification from Accelerations
93(2)
5.2.3 Solution in Time Domain
95(1)
5.2.4 Identification from Bending Moments and Accelerations
96(1)
5.2.5 Regularization of the Solution
97(2)
5.3 Numerical Examples
99(7)
5.3.1 Single Force Identification
100(1)
5.3.2 Two Forces Identification
101(5)
5.4 Laboratory Experiments with Two Moving Loads
106(6)
5.4.1 Experimental Setup
106(2)
5.4.2 Experimental Procedure
108(1)
5.4.3 Experimental Results
109(3)
5.5 Summary
112(1)
Chapter 6 Moving Force Identification in Time Domain
113(60)
6.1 Introduction
113(1)
6.2 Moving Force Identification — The Time Domain Method (TDM)
114(11)
6.2.1 Theory
114(6)
6.2.1.1 Equation of Motion and Modal Superposition
114(1)
6.2.1.2 Force Identification from Bending Moments
115(2)
6.2.1.3 Identification from Accelerations
117(2)
6.2.1.4 Identification from Bending Moments and Accelerations
119(1)
6.2.2 Simulation Studies
120(2)
6.2.3 Experimental Studies
122(3)
6.2.4 Discussions
125(1)
6.3 Moving Force Identification — Exact Solution Technique (EST)
125(46)
6.3.1 Beam Model
125(4)
6.3.1.1 Identification from Strains
126(2)
6.3.1.2 Identification from Accelerations
128(1)
6.3.1.3 Statement of the Problem
129(1)
6.3.2 Plate Model
129(6)
6.3.2.1 Identification from Strains
131(2)
6.3.2.2 Identification from Accelerations
133(1)
6.3.2.3 Computation Algorithm
134(1)
6.3.3 Numerical Examples
135(18)
6.3.3.1 Beam Model
135(9)
6.3.3.2 Two-dimensional Plate Model
144(9)
6.3.4 Laboratory Studies
153(20)
6.3.4.1 Beam Model
153(6)
6.3.4.2 Plate Model
159(12)
6.4 Summary
171(2)
Chapter 7 Moving Force Identification in State Space
173(36)
7.1 Introduction
173(1)
7.2 Method I – Solution based on Dynamic Programming
173(15)
7.2.1 State–Space Model
173(2)
7.2.2 Formulation of Matrix G for Two Moving Loads Identification
175(1)
7.2.3 Problem Statement
175(1)
7.2.4 Computation Algorithm
176(2)
7.2.5 Numerical Examples
178(5)
7.2.5.1 Single-Force Identification
179(1)
7.2.5.2 Two-Forces Identification
180(3)
7.2.6 Experiment and Results
183(4)
7.2.6.1 Single-Force Identification
184(2)
7.2.6.2 Two-Forces Identification
186(1)
7.2.7 Discussions on the Performance of Method I
187(1)
7.3 Method II – Solution based on Regularization Algorithm
188(20)
7.3.1 Discrete Time State–Space Model
188(4)
7.3.2 Moving Load Identification
192(1)
7.3.3 Numerical Studies
193(11)
7.3.3.1 Validation of Method II
195(1)
7.3.3.2 Study on the Effects of Sensor Type and Location
196(2)
7.3.3.3 Further Studies on the Sensor Location Effect and Velocity Measurement
198(3)
7.3.3.4 Effect of the Aspect Ratio of the Bridge Deck
201(1)
7.3.3.5 Further Studies on the Effect of Noise in Different Types of Measurements
202(2)
7.3.4 Experimental Studies
204(2)
7.3.4.1 Experimental Set-up
204(1)
7.3.4.2 Axle Loads and Wheel Loads Identification
204(2)
7.3.5 Comparison of the Two State–Space Approaches
206(2)
7.4 Summary
208(1)
Chapter 8 Moving Force Identification with Generalized Orthogonal Function Expansion
209(26)
8.1 Introduction
209(1)
8.2 Orthogonal Functions
209(4)
8.2.1 Series Expansion
209(1)
8.2.2 Generalized Orthogonal Function
210(1)
8.2.3 Wavelet Deconvolution
211(2)
8.3 Moving Force Identification
213(4)
8.3.1 Beam Model
213(2)
8.3.1.1 Generalized Orthogonal Function Expansion
213(1)
8.3.1.2 Moving Force Identification Theory
214(1)
8.3.2 Plate Model
215(2)
8.4 Applications
217(9)
8.4.1 Identification with a Beam Model
217(4)
8.4.1.1 Single-Span Beam
217(2)
8.4.1.2 Two-Span Continuous Beam
219(2)
8.4.2 Identification with a Plate Model
221(5)
8.4.2.1 Study on the Noise Effect
222(1)
8.4.2.2 Identification with Incomplete Modal Information
223(1)
8.4.2.3 Effects of Travel Path Eccentricity
224(2)
8.5 Laboratory Studies
226(7)
8.5.1 Beam Model
226(1)
8.5.1.1 Experimental Setup and Measurements
226(1)
8.5.1.2 Force Identification
226(1)
8.5.2 Plate Model
227(8)
8.5.2.1 Experimental Set-up
227(1)
8.5.2.2 Wheel Load Identification
228(2)
8.5.2.3 Effect of Unequal Number of Modes in the Response and in the Identification
230(3)
8.6 Summary
233(2)
Chapter 9 Moving Force Identification based on Finite Element Formulation
235(22)
9.1 Introduction
235(1)
9.2 Moving Force Identification
235(9)
9.2.1 Interpretive Method I
235(1)
9.2.1.1 Predictive Analysis
235(1)
9.2.1.2 Interpretive Analysis
236(1)
9.2.2 Interpretive Method II
236(3)
9.2.3 Regularization Method
239(5)
9.2.3.1 Equation of Motion
239(2)
9.2.3.2 Vehicle Axle Load Identification from Strain Measurements
241(2)
9.2.3.3 Regularization Algorithm
243(1)
9.3 Numerical Examples
244(3)
9.3.1 Effect of Discretization of the Structure and Sampling Rate
244(1)
9.3.2 Effect of Number of Sensors and Noise Level
245(2)
9.4 Laboratory Verification
247(2)
9.4.1 Experimental Set-up
247(1)
9.4.2 Identification from Measured Strains
247(2)
9.5 Comparative Studies
249(6)
9.5.1 Effect of Noise Level
249(2)
9.5.2 Effect of Modal-Truncation
251(2)
9.5.3 Effect of Number of Measuring Points
253(1)
9.5.4 Effect of Sampling Frequency
253(2)
9.6 Summary
255(2)
Chapter 10 Application of Vehicle–Bridge Interaction Force Identification
257(32)
10.1 Merits and Disadvantages of Different Moving Force Identification Techniques
257(1)
10.2 Practical Issues on the Vehicle–Bridge Interaction Force Identification
258(4)
10.2.1 Bridge Weigh-In-Motion
258(1)
10.2.2 Moving Force Identification Techniques
259(3)
10.2.2.1 Access to Available Data
260(1)
10.2.2.2 Accuracy of Available Data
261(1)
10.3 Further Comparison of the FEM Formulation and the EST Method in the Vehicle–Bridge Interaction Identification
262(6)
10.3.1 Effect of Road Surface Roughness and Moving Speed
263(1)
10.3.2 Identification of Moving Loads on a Bridge Deck with Varying Speeds
264(3)
10.3.3 Identification with Incomplete Vehicle Speed Information
267(1)
10.4 Dynamic Axle and Wheel Load Identification
268(13)
10.4.1 Dynamic Axle Load Identification
268(7)
10.4.1.1 Study 1: Effect of Number of Modes
268(2)
10.4.1.2 Study 2: Effect of Measuring Locations
270(3)
10.4.1.3 Study 3: Effect of Load Eccentricities
273(2)
10.4.2 Wheel Load Identification
275(6)
10.4.2.1 Study 4: Effect of Measuring Locations
275(3)
10.4.2.2 Study 5: Effect of Load Eccentricities
278(2)
10.4.2.3 Study 6: Effect of Number of Modes
280(1)
10.5 Modifications and Special Topics on the Moving Load Identification Techniques
281(7)
10.5.1 First Order Hold Discrete versus Zeroth Order Hold Discrete
282(4)
10.5.1.1 Zeroth-Order Hold Discrete Method in Response Analysis
282(2)
10.5.1.2 Triangle First-Order Hold Discrete Method
284(2)
10.5.2 First Order Regularization versus Zeroth Order Regularization
286(4)
10.5.2.1 Tikhonov Regularization
286(1)
10.5.2.2 First-Order Tikhonov Regularization
287(1)
10.6 Summary
288(1)
Chapter 11 Concluding Remarks and Future Directions
289(4)
11.1 State of the Art
289(1)
11.2 Future Directions
290(3)
11.2.1 Effect of Uncertainties on Moving Force Identification
290(1)
11.2.2 Moving Force Identification with Complex Structures
291(1)
11.2.3 Integrated Bridge Weigh-In-Motion with Structural Health Monitoring
291(2)
References 293(12)
Subject Index 305(2)
Structures and Infrastructures Series 307
Siu-Seong Law is is an Associate Professor with the Civil and Structural Engineering Department of the Hong Kong Polytechnic University, prior to which he spent several years in the civil engineering industry with especial experience with long-span bridges.
Püsilink: https://www.kriso.ee/db/9780429206153_pe.html
Märksõnad: