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Related Publications

Astrinidis E., Egglezos D.
Instrumented Strain Monitoring of the Acropolis Wall with Optical Fiber Sensors – Comparison of the Measurements to the analytical predictions
3rd Panhellenic Congress of Earthquake Engineering and Seismology
Athens, November 2008
paper (greek) (pdf) paper (english) (pdf)

Athens Acropolis walls instrumentation

Athens Acropolis walls instrumentation

The walls of the Acropolis have suffered severe damage due to environmental causes and human interventions during its long history. Successive additions, remodelling, repairs and other interventions, numerous earthquakes, bombardments, sieges and time itself, inevitably causing structural ageing, have caused damages and structural condition deteriorations which pose serious risks of structural failure.

For the investigation of the Acropolis walls’ structural behavior, the Acropolis Restoration Service of the Ministry of Culture introduced an instrumented health monitoring project. A network of FBG sensors was therefore installed on the Acropolis North, South and East walls. The sensors’ network is constantly providing us with information on the walls’ deformation status and their critical areas’ condition, enabling their structural evaluation and the introduction of alarm values.

South wall

South wall's instrumentation view
South wall's instrumentation view
upper FBG sensors' layout on the South wall
upper FBG sensors' layout on the South wall
lower FBG sensors' layout on the South wall
lower FBG sensors' layout on the South wall
South wall lower FBG sensor array installation works
South wall lower FBG sensor array installation works
South wall middle FBG sensor array installation works
South wall middle FBG sensor array installation works
South wall top FBG sensor array installation works
South wall top FBG sensor array installation works

East wall

East wall's instrumentation view
East wall's instrumentation view
upper FBG sensors' layout on the East wall
upper FBG sensors' layout on the East wall
lower FBG sensors' layout on the East wall
lower FBG sensors' layout on the East wall

North wall

 

SouthEast corner

sensors' layout on the North wall's inner side
sensors' layout on the North wall's inner side
 
lower FBG sensors' layout on the SouthEast corner
lower sensors' layout on the SouthEast corner

walls' monitoring diagrams

SouthEast corner's FBG sensor layout stress diagram
SouthEast corner's FBG sensor layout stress diagram
strain - time diagram for the upper and lower FBG sensor layouts
strain - time diagram for the upper and lower FBG sensor layouts

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