Dynamic Bridge Substructure Evaluation and Monitoring
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TOC
CHAPTER 1. INTRODUCTION
CHAPTER 2. PROJECT SCOPE AND LITERATURE REVIEW
BACKGROUND
RESEARCH SCOPE
PROJECT BACKGROUND AND REVIEW
Damage Risks to Bridge Substructures
Related Work for Bridge Substructure Condition Evaluation
Related Work for Bridge Superstructure Condition Evaluation
Bridge Structural Parameter Identification Work
Uncertainty in Structural Parameter Identification
Damage Indices
Bridge Management Systems
The Role of Bridge Substructure Condition in Bridge Management Systems
CHAPTER 3. DESCRIPTION OF MODAL VIBRATION TEST BRIDGES
INTRODUCTION
TRINITY RIVER RELIEF BRIDGE
WOODVILLE ROAD BRIDGE
OLD RELIANCE ROAD BRIDGE
CHAPTER 4. MODAL TEST PROGRAM FOR BRIDGE
SUBSTRUCTURES
INTRODUCTION
DYNAMIC TESTING INSTRUMENTATION
Vibroseis Truck
Seismic Accelerometers
Dynamic Signal Analyzer Data Acquisition System
FIELD MODAL VIBRATION TEST PROCEDURES
Field Test Program for Trinity River Relief Bridge Bents
Field Test Program for Woodville Road Bridge
Field Test Program for Old Reliance Road Bridge
CHAPTER 5. MODAL VIBRATION DATA PROCESSING AND
ANALYSES
INTRODUCTION
EXAMPLE MODAL VIBRATION FIELD DATA RESULTS
Time-Domain Data, Bents of Structure 4, Trinity River Relief Bridge
Frequency-Domain Data, Bent 2 of Structure 4, Trinity River Relief Bridge
Transfer Function Results, Bents of Structure 4, Trinity River Relief Bridge
MODAL VIBRATION DATA PROCESSING
Curve-Fitting of DP420 Field Modal Vibration Data
Mode Shape Determination Using PCMODAL
SOUND VERSUS SIMULATED SCOUR AND EARTHQUAKE DAMAGE RESULTS, TRINITY RIVER RELIEF BRIDGE
Flexibility Transfer Function Results for Bents 2 and 12
Modal Curve-Fitting Results for Bent 12
SHALLOW VERSUS DEEP FOUNDATION IDENTIFICATION RESULTS—WOODVILLE AND OLD RELIANCE BRIDGES
CHAPTER 6. STRUCTURAL MODELING AND PARAMETER
ESTIMATION
INTRODUCTION
3-D ANSYS MODEL
Descriptions of 3-D FEM Modeling
Results of 3-D FEM Modeling
2-D ANSYS MODELS
Rayleigh-Ritz Method
Description of 2-D FEM Modeling
Results of 2-D FEM Modeling
PARAMETER ESTIMATION WITH PARIS PROGRAM
Error Functions in PARIS
Minimization of Modal Error Functions in PARIS
PARAMETER ESTIMATION USING SIMULATED FIELD DATA
Feasibility Study for Bridge Foundation Stiffness Estimation (Stage 1)
Feasibility Study for Bridge Foundation Stiffness Estimation with Unknown Beam and Column Parameters
(Stage 2)
Effect of Measurement Errors (Stage 3)
Effect of Modeling Errors (Stage 4)
PARAMETER ESTIMATION USING REAL FIELD DATA
Variations of Mode Shapes Extracted from Real Field Data
PARIS Runs Using Real Field Data for Bent 2
PARIS Runs Using Real Field Data for Bent 12
CHAPTER 7. USING THE HILBERT-HUANG TRANSFORM FOR
SUBSTRUCTURE DAMAGE EVALUATION
BACKGROUND
CURRENT APPROACHES IN NONDESTRUCTIVE CONDITION ASSESSMENT
CURRENT VIBRATION-BASED SIGNATURE-RECOGNITION TECHNIQUES
Experimental Vibration Data Processing Analysis Approaches
Signature of Damaged Structural Members
LIMITATIONS OF MODAL VIBRATION APPROACH FOR BENT 12
Review of Field Test Conditions for Structure 4 of the Trinity River Relief Bridge
Fourier and Wavelet Analysis Limitations for Dynamic Properties of Bent 12
HILBERT-HUANG TRANSFORM ANALYSES OF VIBRATION DATA FROM BENTS 12 AND 2
Fundamentals of HHT Method
Hilbert Spectral Analysis
HHT Analysis of Data from Bent 12
HHT Analysis of Data from Bent 2
Force Excitation Normalized HHT Spectra for Bent 12
Model-Based Validation for Bent 12
SUMMARY OF HILBERT-HUANG TRANSFORM RESULTS
CHAPTER 8. INTEGRATION OF DYNAMIC TESTING RESULTS TO BRIDGE MANAGEMENT SYSTEMS
INTRODUCTION
THE ROLE OF NDE IN A BMS
THE ROLE OF DYNAMIC TESTING RESULTS IN A BMS
INTEGRATION OF DYNAMIC TESTING RESULTS INTO A BMS
Experimentation
Evaluation of NDE Methods
Developing Data-Collection Strategy
CHAPTER 9. CONCLUSIONS AND RECOMMENDATIONS
FIELD MODAL VIBRATION DYNAMIC TESTING FOR DAMAGE
FIELD MODAL VIBRATION DYNAMIC TESTING FOR SHALLOW VERSUS DEEP
FOUNDATION DETERMINATION
STRUCTURAL MODELING AND PARAMETER ESTIMATION
HILBERT-HUANG TRANSFORM FOR EVALUATION OF BRIDGE SUBSTRUCTURE DAMAGE
IMPLEMENTING DYNAMIC TESTING RESULTS IN BRIDGE MANAGEMENT SYSTEMS
RECOMMENDATIONS FOR RESEARCH
