Wind-Induced Vibration of Long Span Suspension Bridges.

Format:

Book

Author/Creator:

Yang, Yang.

Series:

Woodhead Publishing Series in Civil and Structural Engineering Series

Language:

English

Subjects (All):

Suspension bridges--Aerodynamics.

Suspension bridges.

Structural dynamics.

Physical Description:

1 online resource (620 pages)

Edition:

1st ed.

Place of Publication:

Chantilly : Elsevier Science & Technology, 2025.

Summary:

Wind-induced Vibration of Long Span Suspension Bridges in mountainous areas includes the author's research on such bridges and adopts a combination of on-site measurements, wind tunnel tests, theoretical analyses and numerical calculations to discuss: the characteristics and parameters of the wind environment at bridge sites; the buffeting.

Contents:

Front Cover

Wind-induced Vibration of Long Span Suspension Bridges

Copyright Page

Contents

1 Introduction

1.1 Introduction

1.1.1 Engineering background and research significance

1.1.2 Research status and review at home and abroad

1.1.2.1 Wind environment at bridge sites in western mountainous areas

Methods of wind environment research

Status of wind environment research at home and abroad

Necessity of wind field characteristics study

1.1.2.2 Buffeting response of long-span suspension bridge

Research status in China and abroad

The necessity of conducting research on bridge buffeting in western mountainous areas

1.1.2.3 Vortex-induced vibration of long-span suspension bridge

Current research status of aerodynamic performance of flat steel box girders at home and abroad

The necessity of studying the aerodynamic performance of wide-body flat steel box girder

1.1.2.4 Flutter characteristics of long-span suspension bridges

Research status at home and abroad

The necessity of conducting flutter studies

1.1.2.5 Vibration characteristics of wind-automobile-bridge systems

State of research on wind-vehicle-bridge system vibrations nationally and internationally

Necessity of research on wind-vehicle-bridge systems

1.1.3 Main research topics

1.1.3.1 Characteristics of the wind environment in the western mountainous area

1.1.3.2 Buffeting response of the large-span suspension bridge

1.1.3.3 Vortex-induced vibration response of the large-span suspension bridge

1.1.3.4 Flutter characteristics of large-span suspension bridges

1.1.3.5 The vibration characteristics of the wind-vehicle-bridge system

References

Further reading

2 Field measurement and analysis of wind characteristics.

2.1 Field measurement and analysis of wind characteristics

2.1.1 Introduction

2.1.2 Wind characteristic parameters

2.1.2.1 Average wind characteristic parameters

2.1.2.2 Characteristic parameters of fluctuating wind

2.2 Wind field measurement

2.2.1 Location

2.2.2 Observation equipment

2.2.2.1 Layout of wind speed measurement point

2.2.3 Analysis of measured wind speed data

2.2.3.1 Mean wind characteristics analysis

2.2.3.2 Pulsating wind characteristics analysis

2.3 Summary of this chapter

3 Analysis of buffeting response of large-span suspension bridges

3.1 Analysis of buffeting response of large-span suspension bridges

3.1.1 Introduction

3.2 Numerical simulation of fluctuating wind

3.2.1 Harmonic synthesis method

3.2.2 Arrangement of fluctuating wind field

3.2.2.1 Selection of parameters

3.2.2.2 Location distribution of wind farm simulation points

3.2.2.3 Fluctuating wind simulation

3.3 Engineering background and static tri-axial force test

3.3.1 Project profile

3.3.2 Dynamic characteristic analysis

3.3.3 Static force test

3.4 Wind load treatment

3.4.1 Aerostatic force

3.4.2 Buffeting force

3.4.3 Self-excited force

3.4.4 Nonlinear buffeting time domain analysis of bridge

3.5 Analysis of the influence of different factors on buffeting response

3.5.1 Buffeting displacement calculation

3.5.2 Influence of fluctuating wind on main tower

3.5.3 Influence of wind speed and wind attack angle

3.6 Summary of this chapter

4 Analysis of vortex-induced vibration response of large-span suspension bridges

4.1 Introduction

4.2 Factors affecting static three-force of wide-body flat steel box girders

4.2.1 The influence of attack angle

4.2.2 The influence of railing ventilation rate.

4.2.3 Three-dimensional reconstruction of road surface roughness

4.2.4 The influence of bridge surface roughness

4.3 Factors affecting the vortex-induced vibration performance of wide-body flat steel box girders

4.3.1 Effect of large angle of attack

4.3.2 Effects of bridge deck roughness

4.3.3 Influence of vehicle type

4.3.4 Impacts of flow distances

4.4 Numerical analysis of vortex-induced vibration performance

4.4.1 Vorticity and wake vorticity under different wind attack angles

4.4.2 Distribution of vortex bubbles and reattachment points for steel box girders with different aspect ratios

4.5 Wind tunnel test and numerical simulation related to VIV response of double-layer steel truss girder

4.5.1 Project profile

4.5.2 Structure dynamic characteristics analysis

4.5.3 Sectional model wind tunnel test design

4.5.3.1 Similarity criterion and parameter design

4.5.3.2 Segmental model making

4.5.4 Original section wind tunnel test results

4.5.4.1 Force test results

4.5.4.2 Vibration test results

4.5.4.3 Peak response point time history and spectrum

4.5.5 The basic theory and method of numerical simulation

4.5.5.1 Basic control equation

Quality control equation

The momentum control equation

Energy control equation

4.5.5.2 Turbulence simulation method

Direct simulation method

Reynolds time-averaged simulation method

Large eddy simulation method

4.5.5.3 Grid quality evaluation index

4.5.5.4 Dynamic mesh technology

4.5.5.5 Secondary development based on Fluent-UDF

4.5.6 Numerical simulation results and check

4.5.6.1 Calculation section and parameter setting

4.5.6.2 Irrelevance verification

Verification of mesh number independence

Verification of the position independence of the abdominal rod

Time step independence verification.

4.5.7 Numerical analysis of vortex-induced vibration in original section

4.5.7.1 Compare and verify the results of experiment and simulation

4.5.7.2 Characteristic analysis of flow field

4.5.8 Effect of wind attack angle

4.5.8.1 Original section of main girder under construction

4.5.8.2 Original section of the main girder in bridge condition

4.5.9 Vortex vibration suppression test of air nozzle measures

4.5.9.1 Operating condition settings

4.5.9.2 Test results

4.5.9.3 Analysis of effect

4.5.9.4 Analysis of flow field characteristics

Original section

Optimal nozzle section

4.6 Factors affecting the vortex-induced vibration response of double-layer steel truss girder

4.6.1 Air nozzle working condition setting

4.6.2 Vibration suppression analysis of updraft nozzle

4.6.2.1 Section setting of working condition

4.6.2.2 Simulation phenomenon analysis

D1 condition

D2 condition

D3 condition

4.6.2.3 Vortex vibration suppression efficiency analysis

4.6.3 Vibration suppression analysis of symmetrical air nozzle

4.6.3.1 Working condition section setting

4.6.3.2 Simulation phenomenon analysis

D4 condition

D5 condition

D6 condition

4.6.3.3 Analysis of vortex vibration suppression efficiency

4.6.4 Downwind nozzle vibration suppression analysis

4.6.4.1 Working condition section setting

4.6.4.2 Simulation phenomenon analysis

D7 condition

D8 condition

D9 condition

4.6.4.3 Analysis of vortex-induced vibration suppression efficiency

4.6.4.4 Vibration suppression analysis of wind-nose parameters

4.6.5 Ventilation rate of sidewalk railing

4.6.5.1 Operation setting

4.6.5.2 Test result

4.6.5.3 Influence mechanism

4.6.6 Air permeability of upper deck railing

4.6.6.1 Operation setting

4.6.6.2 Test results

4.6.6.3 Influence mechanism.

4.6.7 Repair track position

4.6.7.1 Operation setting

4.6.7.2 Test result

4.6.7.3 Influence mechanism

4.6.8 Train sound barrier

4.6.8.1 Operation setting

4.6.8.2 Test result

4.6.8.3 Influence mechanism

4.6.9 Additional pneumatic measure

4.6.9.1 Operation setting

4.6.9.2 Test result

4.6.9.3 Influence mechanism

Top chord deflector

Top string nozzle

Lower chord deflector

Central stabilizer plate

4.7 Machine learning algorithm for predicting VIV performance of double layer steel truss girder

4.7.1 Machine learning algorithm determination

4.7.1.1 Support vector regression algorithm

4.7.1.2 Back propagation neural network algorithm

4.7.1.3 Generalized regression neural network algorithm

4.7.1.4 Random forest algorithm

4.7.2 Model learning sample data processing

4.7.2.1 Database establishment

4.7.2.2 Normalization processing

4.7.2.3 Dataset partitioning

4.7.3 Amplitude prediction of double-deck steel truss girder section

4.7.3.1 Model parameter optimization

SVR model

BPNN model

GRNN model

RF model

4.7.3.2 Evaluation of prediction results

4.7.3.3 Prediction model optimization

4.7.4 Prediction of vortex-induced vibration characteristic parameters

4.7.4.1 Model parameter optimization

4.7.4.2 Analysis of prediction results

4.7.4.3 Prediction model optimization

4.8 Conclusion

Appendices

5 Analysis of flutter characteristics of long span suspension bridges

5.1 Introduction

5.2 Basic theory of flutter derivatives

5.2.1 Free vibration identification of flutter derivatives based on separation state method

5.2.2 Free vibration identification of flutter derivatives based on coupling state method.

5.2.3 Flutter derivative identification method based on divided-state forced vibration.

Notes:

Description based on publisher supplied metadata and other sources.

Part of the metadata in this record was created by AI, based on the text of the resource.

ISBN:

0-443-33519-2

9780443335198

OCLC:

1564627059