Assessment of the Automation Algorithm for TDR Bridge - Ohio ...

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$Page 1 of 8 Traffic Survey Report 12/29/2006 file://X:\TC\Traffic ...$

Outline • Introduction • Literature review: scour monitoring practice and technologies • Validation of Time Domain Reflectometry for scour monitoring • TDR scour measurements in various environments • Development of a field TDR scour sensor • Summary and conclusions, and future work 2
Introduction 1.1 Motivation for Bridge Scour Monitoring • 1987, the Schoharie Creek Bridge on the New York State Thruway • 1989, the US 51 bridge over the Hatchie River in Tennessee • 1995, the I-5 bridges over Arroyo Pasajero in California National Bridge Inspection Standards (NBIS) Minimum 2 year inspection frequency 3
Page 1: ODOT Project Review Session Present
Page 5 and 6: Classification • General Scour
Page 7 and 8: Local Scour • Pier scour and abut
Page 9 and 10: Physical Modeling Parameters relate
Page 11 and 12: Numerical Simulation • 1D simulat
Page 13 and 14: Field observation • A co-operativ
Page 15 and 16: Literature review: scour monitoring
Page 17 and 18: 2.1 Motivation for Scour Instrument
Page 19 and 20: • Lagasse and Price 1997 NCHRP Pr
Page 21 and 22: • Mueller and Landers 1999 PVC-po
Page 23 and 24: National practice of scour monitori
Page 25 and 26: Sonar (cont.) A sonar system for br
Page 27 and 28: Sonar (cont.) • Data Acquisition
Page 29 and 30: Time Domain Reflectometry Dowding a
Page 31 and 32: Reflection at Interface Reflection
Page 33 and 34: Outline • Introduction • Litera
Page 35 and 36: Experiment Setup and Procedure •
Page 37 and 38: Voltage(V) Test results 0.4 0.0 -0.
Page 39 and 40: 3.2 Algorithms for TDR Signal Inter
Page 41 and 42: Mixing Formula for Electrical Condu
Page 43 and 44: sqrt(Ka)/sqrt(kw) Empirical Equatio
Page 45 and 46: River condition assessment • Elec
Page 47 and 48: Results by Using Design Equation
Page 49 and 50: Scour Estimation Based on Detecting
Page 51 and 52: Sample results 0.01 0 -0.01 -0.02 F
Page 53 and 54:
Monitoring of Simulated Scour in Va
Page 55 and 56:
Normalized dielectric constant 1.0
Page 57 and 58:
Normalized dielectric constant 1.0
Page 59 and 60:
TDR measurements of scour for diffe
Page 61 and 62:
Scour Monitoring in Water of High E
Page 63 and 64:
Dielectric constant by insulated pr
Page 65 and 66:
Effect of air bubbles on dielectric
Page 67 and 68:
Scour monitoring in water with vary
Page 69 and 70:
A Comparison of TDR and Ultrasound
Page 71 and 72:
Voltage(V) Results 0.5 0.0 -0.5 -1.
Page 73 and 74:
ECb,w(ms/m) Electric conductivity o
Page 75 and 76:
Outline • Introduction • Litera
Page 77 and 78:
5.2 Use of FEMLAB for TDR Probe Des
Page 79 and 80:
Electric field, Case I 79
Page 81 and 82:
• Effective measured dielectric c
Page 83 and 84:
Sampling area ∫∫ Ω ∑ 100 ×
Page 85 and 86:
5.3 Coated TDR CS605 Moisture Probe
Page 87 and 88:
Lab Evaluation of Strip Scour Senso
Page 89 and 90:
FEMLAB Analysis of the Performance
Page 91 and 92:
Electric potential Sensor in water
Page 93 and 94:
Sampling area, saturate sand Field
Page 95 and 96:
Scour measurement TDR measured scou
Page 97 and 98:
Laboratory Observations and Algorit
Page 99 and 100:
Evaluation of TDR under Various Con
Page 101 and 102:
Future work •Continue to develop
Page 103 and 104:
Acknowledgement • Ohio Department
Page 106:
Connection to another scour monitor
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Assessment of the Automation Algorithm for TDR Bridge - Ohio ...

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