Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA Recent...
11
un Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA Recent Development and Application of Recent Development and Application of tructural Control and Health monitorin tructural Control and Health monitorin Aiqun Li Aiqun Li School of Civil Engineering School of Civil Engineering Southeast University Southeast University June 2008 June 2008
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Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Recent Development and Application of Recent Development and Application of Structural Control and Health monitoringStructural Control and Health monitoring
Aiqun LiAiqun LiSchool of Civil EngineeringSchool of Civil Engineering
Southeast UniversitySoutheast UniversityJune 2008June 2008
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
IntroductionIntroduction Viscoelastic DamperViscoelastic Damper Viscous Fluid DamperViscous Fluid Damper Tuned Liquid Damper / Tuned Tuned Liquid Damper / Tuned
MassMass
Damper / Active Mass DamperDamper / Active Mass Damper Challenges and Future DirectionsChallenges and Future Directions
CONTENTSCONTENTS
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Characteristics of Structural Control
Real-time Control
Huge Weight
Low Frequency
Economical
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Viscous Fluid DamperViscous Fluid Damper
Loop of Damping Force and Displacement
Different kinds of Fluid Dampers
F80510
-16000
-12000
-8000
-4000
0
4000
8000
12000
16000
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12
Displacement(mm)
Forc
e(N
)
F80510
-16000
-12000
-8000
-4000
0
4000
8000
12000
16000
-12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12
Displacement(mm)
Forc
e(N
)
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Application in Civil EngineeringApplication in Civil Engineering
Applied in Vibration Reducing of Buildings, High-rise Buildings, Super High-rise Buildings ， Towers ， Long-span Structures and Bridges, etc.
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
ContentsContents
Introduction
Structural health monitoring system
Baseline finite element modeling
Structural damage alarming
Data Analysis of GPS Monitoring System
Data Analysis of Wind Monitoring System
Data Analysis of Stress Monitoring System
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
IntroductionIntroduction
Determination of damage existenceDetermination of damage existence
Determination of damage’s geometric locationDetermination of damage’s geometric location
Quantification of damage severityQuantification of damage severity
Prediction of remaining life of the structurePrediction of remaining life of the structure
Objective of structural health monitoring
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Structural health monitoring and condition assessment system for Runyang Yangtse River Bridge
150T超大型车辆过桥监测 ( 2005.7.20) 台风“麦莎”期间监测数据分析（ 2005.8.7)
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Wavelet packet energy spectrum of structural response
Wavelet packet energy spectrum of structural response
Multi-scale decomposition of structural response
Multi-scale decomposition of structural response
Multi-scale decomposition of structural system
Multi-scale decomposition of structural system
t
0
),1()1(
),1()1()1,1(
kii
kiikiii
iii
VV
VVV
FB
xAx
12,1,0,, iiiij
ji fffff
2
,, jijiE f
),()(
),()()1,(
kNN
kNNkN
FB
xAx
Structural damage alarmingStructural damage alarming
Strategy and methodology
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Structural damage alarming method and system based on the energy variations of structural ambient vibration responses decomposed using wavelet packet analysis
WPES Calculation Method
小波函数的选择
最优小波包基的选择
损伤特征频带的选择
WPES Index
损伤预警指标的构造
损伤敏感性比较分析
噪声鲁棒性比较分析 0
10
20
30
40
50
0 2 4 6 8 10 12 14 16 18 20 22
小时
损伤
预警
指标
（%
）
0 50 100 150 200 25010
-4
10-2
100
102
0 50 100 150 200 25010
-3
10-2
10-1
100
101
102
Aiqun Li, Professor, Ph.D, School of Civil Engineering, Southeast University,CHINA
Thanks for your attention!Thanks for your attention!
