CONTROL OF EARTHQUAKE INDUCED VIBRATIONS

The Control Of Earthquake Induced Vibrations In Buildings



Abstract:

The risk of the vibration of the buildings induced by earthquake could be reduced by using system analyzing and modelling. It is important to demonstrate in control system by control theory for future uses. This thesis is to introduce the active control methodology to produce and observe the system under earthquake environment in real time system. Finite element modelling method and Stat-Space method are using for system analysis. In addition this thesis is based on Matlab software programming.

Key words: Vibration Control, Finite Element Modelling Method; Real time system.

ACHIEVEMENTS

The System of the simple structure is built; the result of mathematical analysis could be used in modelling structure. It will benefit on future safety for building structure in long term.

ACKNOWLEDGEMENTS

I would like to give my best appreciate to my supervisor, Dr Simon A Pope, for his directed help in this project essentials, the important guidance and valuable suggestion for this project.

I also would like to thank Mr. Bacon and his colleague for their patience in assistance which helps me to have a better understanding and construction in physical model part in this project.

Finally, I would like to give my thanks to my parents for their supports during these times.

LIST OF TABLES

Table 1 Definition of Symbols

Table 2 Parameters of Fibre Glass

Table 3 Parameters of Fibre Glass in final design

LIST OF FIGURES

Figure 1 2-d sketch for initial design

Figure 2.1 Single support

Figure 2.2 Finite Element Modelling Method in one support

Figure 2.3 Bode Diagram for one support

Figure 2.4Building Structure

Figure 2.5Structure analysis

Figure 2.6A side analysis

Figure 2.7Bode Diagram for four supports

Figure 2.8Bode Diagram for final design

Figure 3.1Top part

Figure 3.2Base part

Figure 3.3Interface Board

TABLE OF CONTENTS

CHAPTER 1: INTRODUCTION8

Background of the Study8

Aims And Objectives9

Rationale of the Study10

System Analysis In Case12

Control design12

Finding recourses and affection of the vibration13

The method to reduce the vibration13

Mathematical analysis14

Evaluate the structure response and Physical model14

Objectives15

CHAPTER 2: LITERATURE REVIEW16

Challenges in training the emergency managers18

Training emergency managers for earthquake response: challenges and opportunities21

Finite Element Modelling Method For One Support30

State Space Method32

Four Supports Analysis34

State space Method for 4 Supports37

CHAPTER 4: RESULTS40

Mass Spring Modelling Method42

CHAPTER 5: PHYSICAL MODEL AND DEMONSTRATION45

Physical model45

Demonstration47

Seismic Performance48

Basics Of Seismic Performance Analysis48

Seismic Vibration Control49

Seismic Designs49

CHAPTER 6: CONCLUSION51

Achievements and Conclusion51

Discussion51

Further Features52

REFERENCES53

APPENDIX58

CHAPTER 1: INTRODUCTION

Background of the Study

System analyzing and modelling are control method in order to reduce the risk of the vibration of the buildings induced by earthquake. It is important for future uses in real life. The active control methodology needs to be followed to produce and observe the system under earthquake environment in real time system. Finite element modelling method and Stat-Space method are using for system analysis.

Earthquake vibration surface of the Earth, which is excited in the metamorphosis of the Earth's interior. These movements are performed by the function of propagating waves in the solid rock of the Earth. Most often, the nature of the oscillations depends on the properties and density. The place where the waves are formed, called the hearth. Point located on the ground directly over the fire (waves) is ...