Wavelet-Based Vibration Control of Smart Buildings and Bridges  book cover
1st Edition

Wavelet-Based Vibration Control of Smart Buildings and Bridges

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ISBN 9781420089233
Published April 27, 2009 by CRC Press
238 Pages 90 B/W Illustrations

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Book Description

Earthquakes, bridge collapses, and other natural disasters have dominated news coverage in the last few years. Aging infrastructure needs to be rehabilitated and new infrastructure needs to be designed differently. Presenting a highly innovative, modern approach verging on the futuristic, Wavelet-Based Vibration Control of Smart Buildings and Bridges discusses a new generation of building and bridge structures that not only withstands [generation is singular] the destructive effects of nature but is also impact and explosion resistant.

Based on the groundbreaking work of Hojit Adeli, the book introduces the new mathematical concept of wavelets into the field of structural vibration control. It presents a new control algorithm for robust control of smart civil structures subjected to destructive environmental forces, such as earthquakes and wind. It then discusses a new hybrid control system, the hybrid tuned liquid column damper (TLCD) system. The new hybrid control system, which combines passive and semi-active control systems, is intended to achieve increased reliability and maximum operability of the control system during power failure and to eliminate the need for a larger power requirement.

The great majority of papers published in this area of active structural vibration control deal with small or academic problems. The models in this book have been tested and their effectiveness evaluated extensively on small problems for the sake of comparison with other methods and results reported in the literature. The authors go one step further and apply them to realistic and large building and bridge structures to demonstrate the applicability of the new smart technology to large real-world civil structures. Balancing coverage between theory and application, the book demonstrates the benefits of the new smart technology in the design of structures that are safer and more sustainable.

Table of Contents


Motivation and Objectives

Overview of the Book

Vibration Control of Structures


Passive Control of Structures

Active Control of Structures

Semi-Active Control of Structures

Hybrid Control of Structures

Concluding Remarks


What is a Wavelet?

Types of Wavelets

Multiresolution Analysis

Time-Frequency Signal Analysis of Earthquake Records


Continuous Wavelet Transform (CWT)

Ground Motions as a Sequence of Penny-Shaped Ruptures at Different Locations along the Fault Line

Selection of the Basis Wavelet Function

Representing Earthquake Acceleration Signals by Wavelet Saclograms

Concluding Remarks

Feedback Control Algorithms


Equations of Motion

LQR Control Algorithm

LQG Control Algorithm

Shortcomings of Classic Control Algorithms

Filtered-x LMS algorithm


Adaptive LMS Filter

Filtered-x LMS Control Algorithm

Application to Active Tuned Mass Damper

Hybrid Feedback-LMS Algorithm


Hybrid Feedback-LMS Algorithm

Application to Active Tuned Mass Damper

Concluding Remarks

Wavelet-Hybrid Feedback LMS Algorithm for Robust Control of Structures


Wavelet Transform as an Effective Filter for Control Problems

Wavelet-Hybrid Feedback LMS Control Algorithm

Concluding Remarks

Hybrid Control of 3D Irregular Buildings under Seismic Excitation


Analytical Model

Optimal Control of 3D Irregular Buildings Equipped with Hybrid Damper-TLCD System

Vibration Control of Highrise Buildings under wind Loading


76-Story Benchmark Building

Semi Active TLCD System

Hybrid Damper-TLCD System

Stochastic Wind Loads

Vibration Control of Cable-Styed Bridges


Cable-Stayed Bridge Benchmark Problem

Numerical Simulation

Sensitivity Analysis

Concluding Remarks

Conclusion – Toward a New Generation of Smart Building and Bridge Structures



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Adeli\, Hojjat; Kim\, Hongjin