Structural Dynamics for Engineers, 2nd edition

H.A. Buchholdt and E. Moossavi-Nejad

Price: £ 36.00

ISBN: 9780727741769

Format: Paperbound

Publish Date: 24/11/2011

Publisher: ICE Publishing

Page Size: 243x170mm

Number of Pages: 336

Structural Dynamics for Engineers, 2nd edition

Description

Structural Dynamics for Engineers, Second edition is the essential introduction to the dynamics of civil engineering structures for students of structural engineering and graduate engineers.

This book uses carefully-selected worked examples to instil an understanding of the theories underlying widely-used computer analysis systems and show readers how to carry out simple hand calculations in structural dynamics. The methods presented enable readers to check the validity of their results and eliminate errors in their calculations.

• Worked examples in every chapter demonstrate the use of the theories presented.
• Additional purpose-written problems allow you to practice your skills.
• Covers the implementation of damping in design and analysis and the use of dampers to reduce vibration in dynamically sensitive structures.
• Addresses the use of power spectra to predict responses to wind and earthquakes.
• Helps readers to understand and implement modern design codes, which increasingly require knowledge of vibration caused by man or the environment.

Structural Dynamics for Engineers, Second edition provides student and graduate engineers with a clear understanding of the evaluation of structural dynamics using simple methods.

Contents

1 - Causes and effects of structural vibration
Vibration of structures: simple harmonic motion
Nature and dynamic effect of man-made and environmental forces
Methods of dynamic response analysis
Single DOF and multi DOF structures
Importance of dynamic testing

2 - Equivalent one degree of freedom systems
Modelling of structures as one DOF systems
Theoretical modelling by equivalent one DOF mass-spring systems
Equivalent one DOF mass-spring systems for linearly elastic line structures
Equivalent one DOF mass-spring systems for linearly elastic continuous beams
First natural frequency of sway structures
Plates

3 - Free vibration of one degree of freedom systems
Free un-damped rectilinear vibration
Free reticular vibration with viscous damping
Evaluation of logarithmic decrement of damping from the decay function
Free un-damped rotational vibration
Polar moment of inertia of equivalent lumped mass-spring system of bar element with one free end
Free rotational vibration with viscous damping

4 - Forced harmonic vibration of one degree of freedom systems
Rectilinear response of one DOF system with viscous damping to harmonic excitation
Response at resonance
Forces transmitted to the foundation by rotating unbalance in machines and motors
Response to support motion
Seismographs
Rotational response to one DOF systems with viscous damping to harmonic excitation

5 - Evaluation of equivalent viscous damping coefficients by harmonic excitation
Evaluation of damping from amplification of static response at resonance
Vibration at resonance
Evaluation of damping from response functions obtained by frequency sweeps
Hysteric damping
The effect and behaviour of air and water at resonance

6 - Response of linear and non-linear one degree of freedom systems to random loading: time domain analysis
Step-by-step integration methods
Dynamic response to turbulent wind
Dynamic response to earthquakes
Dynamic response to impacts caused by falling loads
Response to impulse loading
Incremental equations of motion for multi-DOF systems

7 - Free vibration of multi-degrees of freedom systems
Eigenvalues and eigenvectors
Determination of free normal mode vibration by solution of the characteristic equation
Solution of cubic characteristic equations by the Newton approximation method
Solution of cubic characteristic equations by the direct method
Two eigenvalue and eigenvector theorems
Iterative optimization of eigenvectors
The Rayleigh quotient
Condensation of the stiffness matrix in lumped mass analysis
Consistent mass matrices
Orthogonality and normalization of eigenvectors
Structural Instability

8 - Forced harmonic vibration of multi-degrees of freedom systems
Forced vibration of undamped two DOF systems
Forced vibration of damped two DOF systems
Forced vibration of multi-DOF systems with orthogonal damping matrices
Tuned Mass Dampers

9 - Damping matrices for multi-degrees of freedom systems
Incremental equations of motion for multi-DOF systems
Measurement and evaluation of damping in higher modes
Damping matrices for mult--degrees of freedom systems
Modelling of structural damping by orthogonal damping matrices

10 - The nature and statistical properties of wind
The nature of wind
Mean wind speed and variation of mean velocity with height
Statistical properties of the fluctuating velocity component of wind
Probability density function and peak factor for fluctuating component of wind
Cumulative distribution function
Pressure coefficients

11 - Dynamic response to turbulent wind: frequency domain analysis
Aeroelasticity and dynamic response
Dynamic response analysis of aeroelastically stable structures
Frequency domain analysis of single-DOF systems
Relationships between response, drag force and velocity spectra for one DOF systems
Extension of the frequency domain method to multi-DOF systems
Summary of expressions used in the frequency domain method for multi-DOF systems
Modal force spectra for two DOF systems
Modal force spectra for three DOF systems
Aerodynamic damping of multi-DOF systems
Simplified wond response analysis of linear multi-DOF structures in the frequency domain
Concluding remarks on the frequency domain method
Vortex shedding of bluff bodies
Random excitation of tapered cylinders by vortices
Suppression of vortex-induced vibration
Dynamic response to the buffeting of wind using time-integration methods

12 - The nature and properties of earthquakes
Types and propagation of seismic waves
Propagation velocity of seismic waves
Recording of earthquakes
Magnitude and intensity of earthquakes
Influence of magnitude and surface geology on characteristics of earthquakes
Representation of ground motion

13 - Dynamic response to earthquakes: frequency domain analysis
Construction of response spectra
Tripartite response spectra
Use of response spectra
Response of multi-DOF systems to earthquakes
Deterministic response analysis using response spectra
Dynamic response to earthquakes using time domain integration methods
Power spectral density functions for earthquakes
Frequency domain analysis of single-DOF systems using power spectra for translational motion
Influence of the dominant frequency of the ground on the magnitude of structural response
Extension of the frequency domain method for translation motion to multi-DOF structures
Response of one-DOF structures to rocking motion
Assumed power spectral density function for rocking motion used in examples
Extension of the frequency domain method for rocking motion to multi-DOF structures
Torsional response to seismic motion
Reduction of dynamic response
Soil structure interaction

14 - Generation of wind and earthquake histories
Generation of single wind histories by a Fourier series
Generation of wind histories by the autoregressive method
Generation of spatially correlated wind histories
Generation of earthquake histories
Cross correlation of earthquake histories
Design earthquakes