r - The Hong Kong Polytechnic University

Type of
Input Data
Type of Data
Processing
Type of Data
Classification
Type of Data
Measurements
& Analysis
Type of Measured/Derived
Parameters
Type of Plots
Cor
Data Editing
Corrosion
Data
Classification
Corrosion Data
At Tower-Bases
Corrosion Data
At Pier-Bases
Corrosion Data
At Concrete
Decks
Open Circuit
Potential
Corrosion
Current
AC -Resistance
Linear
Polarization
Resistance
Temperature &
Relative Humidity
In Concrete
Corrosion Induced
Deterioration
Model of Concrete
Open Circuit
Potential
Corrosion
Current
Concrete
Resistivity
Linear Polarization
Resistance (LPR)
Concrete
Temperature
Relative Humidity
in Concrete
Corrosion Rate
(based on LPR)
Corrosion Rate
(Tafel Plots)
Reinforcement
Deterioration
Crack Initiation &
Propagation
Time to Corrosion
Cracking of Concrete
Cover
Plots of Corrosion Potential
with indication of Critical
Potential for Corrosion
Plots of Corrosion Current
with indication of Critical
Current for Corrosion
Plots of Concrete Resistivity
with indication of Critical
Resistance for Corrosion
Plots of Linear Polarization
Resistance with indication of
Critical Range for Corrosion
Plots of Corrosion Rate
with indication of Critical
Range for Corrosion
Plots of Relative Humidity
inside Concrete with indication
of Critical Range for Corrosion
Output of Corrosion Rate
(based on LPR)
Output of Corrosion Rate
(based on Tafel Plots)
Output of Reinforcement
Deterioration
Output of Crack Initiation &
Propagation
Output of Time to Corrosion
Cracking of Concrete Cover
Figure 16 Flow Diagram of Customized Software Tools for Corrosion Status Monitoring
Type of
Input Data
Type of Data
Processing
Type of Data
Classification
Type of Data
Analysis
Type of Derived
Parameters
Type of Plots
DWIMS
Influence
Lines
Analyzed
Results &
BS 5400
Part 10
VC
GPS
D-Str
Data Editing
Traffic Data
Classification
Selection of
Data at the same
time period as
the DWIMS data
considered
Traffic Data
Classification
Conversion of
Video Data into
Numerical Data
Selection of
Data at the same
time period as
the DWIMS data
considered
Data Editing
Axle-Speed
Axle-Weight
Condition 3 :
Traffic Jammed
Length ≧100 m
Condition 2 :
Traffic Jammed
Length < 100 m
Condition 1 :
Free-Flow
Traffic
GPS Data at
Deck-Levels
Dynamic Strain
Data at
Deck-Levels
Detailed Vehicular
Classification
Simplified Vehicular
Classification
Fatigue Damage
Analysis based
on Traffic Data
Traffic Data
Analysis
Stress Ranges
Analysis of
Simplified or
Detailed
Vehicular Types
Traffic Composition
Analysis
Goods Vehicles
Positions Analysis
Traffic Load-
Effects Analysis
Analysis
Not Required
Time-Averaging
Statistics Analysis
Rainflow Counts of
Dynamic Strains
Highway Loading
Spectrum – Detailed
Vehicular Types
Highway Loading
Spectrum – Simplified
Vehicular Types
Fatigue damage on
each traffic lane and sum
of fatigue damage in
Dual-3 carriageway
Percentage of
Commercial Vehicles
Total Daily Flow Rate
(in terms of passenger
car unit or pcu)
Over-Weighed Axles
Highway Loading
Spectrum under
Jammed Traffics
Positions and Vehicle
Weights of Goods
Vehicles in Main Span
Load-Effects on each
pre-defined key locations
Status of displacement,
stress distribution &
fatigue damage in
pre-defined key location
Highway Loading
Spectrum Diagram
(Detailed Classification)
Highway Loading
Spectrum Diagram
(Simplified Classification)
Fatigue Damage on each
traffic lane and overall fatigue
Damage on Dual-3 carriageway
Plots of Monthly Maximum
Total Daily Flow Rates
on Each Traffic Lanes with
indication of percentage of
Commercial Vehicles
Plots of Axle Flow in Each
Traffic Lane & Carriageway with
the indication of the % of
over-weighed axles
Highway Loading Spectrum
Diagram under
Jammed Traffics
Tabulation of Positions and
Vehicle Weights of Goods
Vehicles in Main Span
Output of Load-Effects on predefined
key locations for each
Identified Traffic Condition
References of Displacement,
Stress Distribution & Fatigue
Damage Status in Pre-defined
Key Locations
Figure 17 Flow Diagram of Customized Software Tools for Highway Traffics Monitoring
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