27 - Vlamis-Stathopoulos

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Computerized Visual Inspection System &

Structural Health Monitoring of Rion Antirion

Viaduct

IBC - June 4th 2008

Benoit KROELY - ADVITAM


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Agenda

Project description

Periodic Inspection

Structural Health

Monitoring


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Project Description


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Rion-Antirion environment & design loads

RN RN

65 m.

PROJECT BRIEF DESCRIPTIONRION-ANTIRION ENVIRONMENT & DESIGN LOADS

Design Loads:

Earthquake with a return period of 2000 yrs or 5%

possibility of exceedance in 120 yrs (operational life)

Tectonic movements of 2m in all directions between

adjacent piers

Wind speeds up to 266km/h

Ship collision of 180000t DWT approaching at a

speed of 16 knots


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Main Bridge

Cable-stayed Bridge of 5 spans Shallow foundation on reinforced soil

Continuous deck fully suspended from the top of pylons

Dissipation system

286 560

2252

560 560 286

PROJECT BRIEF DESCRIPTION MAIN BRIDGE


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Construction


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Structural Risk Analysis

D fi iti f th t


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Definition of the system

12

3

Likelihood

Severity General surveillance : visual, ndt, post incident =

Inspection & Maintenance Manual

Continuous monitoring: when visual inspection is not sufficient

(no detection, not enough reactivity or too expensive)

Structural Risk Analysis


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Organization chart

STRUCTURAL MAINTENANCE MANAGEMENTORGANIZATION CHART

Gefyra SA

(Concessionaire)Gefyra SA Structural Dpt

Gefyra Litourgia SA

(Operating Company)Regular Maintenance

Laboratories for

NDTs & DTs

Heavy Maintenance

Inspections &,

Regular Maintenance

Structural

Monitoring

Geometrical

Monitoring

Instrumented

MonitoringSpecialized

MaintenanceDomain of responsibilities:

Operation & Routine

Maintenance


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Periodic Inspection & Structural

Maintenance Management


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M th d f i ti & D t M t


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Method of inspections & Data Management

1. Computerized Inspections.

Customized software (ScanPrint) according to the Maintenance Manual requirements wasdeveloped by Advitam for the Inspection missions and the data management

Defects type and position is clearly defined (drawings, photos, etc)

Handheld computers are used by the inspectors

2. Inspection Data Management Data are stored in a database (easy historical retrieving)

Minimized interfaces from inspection to analysis

Automatic factual reports are issued

Analysis report and recommendations for the deteriorated areas treatment is provided by

the inspection company Statistical analysis for the rating, evolution, location of each defect type will be available

Objective: Optimized long-term maintenance program.

STRUCTURAL MAINTENANCE MANAGEMENTMETHOD OF INSPECTIONS & DATA MANAGEMENT

Inventory large bridge


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Dynamic lists of data

Dynamic documentlibrary

Quick access to data

Advanced photomanagement

Advanced drawingmanagement

Inventory large bridge

Main Accesses in Piers & Pylons


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Main Accesses in Piers & Pylons

STRUCTURAL MAINTENANCE MANAGEMENTMAIN ACCESSES IN PIERS &PYLONS

Access shall be sufficient todetect relevant refects


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General calendar of intervention defined per

group of element

Time

CONTROL PERIODICITY

5

years

10

years15

years

Time

5

years

10

years15

years

CONTROL PERIODICITY

Periodic Inspections (Routine and Structural)

Ageing of

structure

Ageing of

materials

Regular Inspections Check List


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Checklists

Rating system

Photos

Comments

Sketches

DocumentsMaintenance recommendations

Regular Inspections

Check List

Computerized detailed inspection: Inspection drawings


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Computerized detailed inspection: Inspection drawings

Defect database


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Defect database


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Structural Health Monitoring


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Structural Monitoring System

100 Sensors more than 300 channels

Real Time Information, up to 500 Hz per sensors

Fully customizable system

Specified during design

Installed to follow construction

Used to manage operation

Maintenance Management Detection of defects

Control of maintenance actions

Traffic management

Design calculations


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3D Accelerometers

Monitoring of vibration of Ground

Deck

Pylons

Stay

Wind & Earthquake characterization.

Verification of parametric excitation

RION ANTIRION BRIDGE MONITORING Sensors Mounting AdvitamRION ANTIRION BRIDGE MONITORING Sensors Mounting Advitam

3D ACCELEROMETER ON PYLON

36363535 1212

EE

EaEaZ

X or Y

General bridge orientation

Sensoraxes orientation

Note for eachsensor

General bridge

orientation

Sensoraxes

orientation

X+

Y+

Z+

3636 4848

4747

X

Z

XX

Z

4444

4545

!!

Top an Deck (T and D) accelerometer

are +/-20g rangeand Bottom (B) are +/-3g


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2D Tiltmeters

Real time inclination of pylon

Geometric control

RIONANTIRIONBRIDGE MONITORING Sensors Mounting AdvitamRIONANTIRIONBRIDGE MONITORING Sensors Mounting Advitam

Z

X

ZZ

X

3DACCELEROMETER ONDECK

4747 4444

3636

4848

3636

3535

1212

45

(cable)

45

(cable)

+


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Load Cells & Tensiomag Sensors

Dynamic & Static tension in stays

Bridge balancing


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Displacement sensors

Joint opening

Thermal gradient characterization


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Strain gages

Loads on fuse & gussets

Wind & Earthquake characterization

Fatigue analysis


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Meteorological Stations

Wind Speed, Direction, Temperature, Relative

Humidity

Two stations Top of Pylon

Deck Level


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Water level in pylons

Filling of piers with water was identified as a critical

risk

Prevention of settlement of a pier


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Road Temperature

Trafic management

Acquisition Unit &

UPS S stem


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Data acquisition and

Transmission System

UPS System

Optical Fiber

Network

Junction box

HEALTH MONITORING IN ACTIONDATA ACQUISITION & TRANSMISSION SYSTEM

Brief description of the system (Contd)


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Earthquake

monitoring

Advanced alarm

management

Brief description of the system (Cont d)

Main functions of the Bridge Monitoring software

Global view of

sensors foralerts

Real timemeasurements User defined

graphics

Datamanagement

History of actions

(log file)

Acquisition

parametersThresholds

definition

STRUCTURAL MONITORING

BRIEF DESCRIPTION OF THE SYSTEM (CONTD)

Structure and system surveillance


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y

After Earthquakes


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te a t qua es

EARTHQUAKE !

Automatic modification of

acquisition parameters

Automatic Data treatment

Automatic Report, Mail and

Phone Call

Automatic event detection

Monitoring Report Level 1


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o o g epo e e

ACTION PLAN (NEW) MONITORING REPORT LEVEL 1 (CONTD)

Part 1: Reports form (void) Reports form (completed)


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Conclusions


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The Inspection-Maintenance and Monitoring

program applied on the Rion-Antirion Bridge

ensures:

1. The continuous structural monitoring of the Bridge maintaining

the high-level of safety to the users.2. The advanced detection of possible deterioration with minimum

inspection time with the computerized inspection software

(ScanPrint).

3. The storage of all the inspection data in one single database.

4. The time-effective management of inspection data.

5. The optimization of maintenance (cost and time reduction, less

traffic restrictions).


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RION-ANTIRION BRIDGE

Q&A