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Geotechnical and Geological Engineering

, Volume 37, Issue 5, pp 4405–4419 | Cite as

Suitability of Optical Fibre Sensors and Accelerographs for the Multi-disciplinary Monitoring of a Historically Complex Site: The Case of the Acropolis Circuit Wall and Hill

  • Elena KapogianniEmail author
  • Ioannis Kalogeras
  • Prodromos Psarropoulos
  • Dionisia Michalopoulou
  • Vassiliki Eleftheriou
  • Michael Sakellariou
Original Paper

Abstract

The purpose of the current study is the investigation of the suitability of optical fibre sensors and accelerographs for the multi-disciplinary monitoring of historically complex sites, focusing on the Acropolis Circuit Wall and Hill. The Acropolis of Athens is the most outstanding ancient Greek monumental complex still existing in our time, with the most well known monuments being the Parthenon, the Erechtheion, the Propylaia and the Arrephorion. Among the standing monuments of the Acropolis Hill, the Circuit Wall functions as a gravity wall, retaining poorly compacted backfill that covers the inclined bedrock, and has suffered over the years various types of loading, leading to structural damages. The historical significance, the complexity of the geomorphological conditions in the region and the vulnerability of the archaeological site to natural and man-made hazards has led over the last years to the application of various contemporary technologies on it. In this framework and aiming to the investigation of the structural integrity of the Circuit Wall and the Acropolis Hill, multi-disciplinarily monitoring has been included, via optical fibre sensors and accelerographs. More specifically, an optical fibre array has been developed on the Circuit Wall of the Acropolis Hill, continuously transmitting data since June 2016 to date. Furthermore, 10 high-quality broadband accelerographs have been installed over the last decade on specific locations on the Hill, recording in continuous mode on 24-bit digitizers and transmitting data in real time. In the current paper the monitoring arrays are presented and characteristic recordings are shown and discussed.

Keywords

Historically complex sites Cultural heritage preservation Acropolis Hill Circuit Wall Optical fibre sensors Accelerographs Structural monitoring Arrays Real-time recordings 

Notes

Acknowledgements

Part of this work was implemented within the frame of the research project “Structural health monitoring of the behaviour of the Acropolis Walls under seismic loading, via combined instrumentation with optical fiber sensors and accelerometers” supported by “John Latsis Public Benefit Foundation” (Scientific Projects 2015). The first author is grateful for financial support provided by the State Scholarships Foundation of Greece (IKY). IG-NOA is being contracted by YSMA for the maintenance of the accelerographic array and the strong motion data processing.

References

  1. Ambraseys N (2010) On the long-term seismicity of the city of Athens. Proc Acad Athens A:81–136Google Scholar
  2. Andronopoulos B, Koukis G (1976) Geological and geotechnical study in the Acropolis region. Inst Geol Miner Explor Athens 1:49Google Scholar
  3. Chatzi E (2017) A monitoring approach to smart infrastructure management. J Proc 1(8):755CrossRefGoogle Scholar
  4. Eleftheriou V (2015) Protection of the rock and the fortification walls of the Acropolis. Works accomplished and future projects. In: The Acropolis restoration news no 14–15. pp 11–14Google Scholar
  5. Higgins M, Higgins R (1996) A geological companion to Greece and the Aegean. Gerald Duckworth & Co., London, pp 26–31Google Scholar
  6. Kalogeras IS, Egglezos D (2013) Strong motion record processing for the Athenian Acropolis seismic response assessment. In: Bilotta E, Flora A, Lirer S, Viggiani C (eds) Proceedings of the 2nd international symposium geotechnical engineering for the preservation of monuments and historic sites, Napoli, 30–31 May, Geotechnical Engineering for the Preservation of Monuments and Historic Sites. Taylor & Francis Group, London, pp 483–492Google Scholar
  7. Kalogeras I, Stavrakakis G, Melis N, Loukatos D, Boukouras K (2010) The deployment of an accelerographic array on the Acropolis hill area: implementation and future prospects. In: Proceedings of a one-day conference, modern technologies in the restoration of the Acropolis, Athens, Greece, pp 39–42Google Scholar
  8. Kalogeras I, Evangelidis C, Melis N, Boukouras K (2012) The Athens Acropolis strong motion array. In: EGU general assembly, geophysical research abstracts, vol 12. EGU, Vienna, pp 1012–9523Google Scholar
  9. Kapogianni E, Laue J, Sakellariou M, Springman SM (2010) The use of optical fibers in the centrifuge. In: Proceedings of the 7th international conference on physical modelling in geotechnics, Zurich, Switzerland, pp 343–348Google Scholar
  10. Kapogianni E, Kalogeras I, Psarropoulos PN, Giokaris S, Sakellariou MG (2016a) Structural health monitoring of the Athenian Acropolis’ Walls via optical fibre sensors, accelerographs and numerical simulations. In: Van Balen K, Verstrynge E (eds) Structural analysis of historical constructions: anamnesis, diagnosis, therapy, controls. Taylor & Francis Group, CRC Press, Boca Raton, pp 701–707CrossRefGoogle Scholar
  11. Kapogianni E, Sakellariou MG, Laue J, Springman SM (2016b) Investigation of the mechanical behavior of the interface between soil and reinforcement, via experimental and numerical modelling. Procedia Eng 143:419–426CrossRefGoogle Scholar
  12. Kapogianni E, Sakellariou MG, Laue J (2017a) Experimental investigation of reinforced soil slopes in a geotechnical centrifuge, with the use of optical fibre sensors. Geotech Geol Eng 35(2):585–605CrossRefGoogle Scholar
  13. Kapogianni E, Psarropoulos PN, Kalogeras I, Sakellariou MG (2017b) Athenian Acropolis: records and numerical simulations for the assessment of the dynamic response of the Hill and the seismic distress of the masonry perimeter Wall. In: 3rd International conference on protection of historical constructions, Lisbon, PortugalGoogle Scholar
  14. Koukis G, Pyrgiotis L, Kouki A (2015) The Acropolis Hill of Athens: engineering geological investigations and protective measures for the preservation of the site and the monuments. Eng Geol Soc Territ 8:89–93Google Scholar
  15. Pelecanos L, Soga K, Chunge MPM, Ouyang Y, Kwan V, Kechavarzi C, Nicholson D (2017) Distributed fibre-optic monitoring of an Osterberg-cell pile test in London. Geotech Lett 7:152–160CrossRefGoogle Scholar
  16. Psarropoulos PN, Kapogianni E, Kalogeras I, Michalopoulou D, Eleftheriou V, Dimopoulos G, Sakellariou M (2018) Seismic response of the Circuit Wall of the Acropolis of Athens: recordings versus numerical simulations. Soil Dyn Earthq Eng 113:309–316CrossRefGoogle Scholar
  17. Sakellariou M, Kapogianni E, Kalogeras I, Psarropoulos P (2016) Investigation of Structural behaviour of the perimetric Wall of the Athens Acropolis against seismic loads, via combined instrumented monitoring with optical fibre sensors and accelerographs. In: Scientific project report John Latsis Public Benefit Foundation, p 80Google Scholar
  18. Soga K, Kwan V, Pelecanos L, Rui Y, Schwamb T, Seo H, Wilcock M (2015) The role of distributed sensing in understanding the engineering performance of geotechnical structures. In: Geotechnical engineering for infrastructure and development, XVI ECSMGE. ICE Publishing, pp 13–48Google Scholar
  19. Trikkalinos IK (1977) Remarks on the published study on the geology of the Acropolis. Proc Acad Athens 12–05:311–342Google Scholar
  20. Zampas C, Ambraseys N, Boletis C, Zamba I (2011) The two Choragic Columns of the south slope of the Acropolis, as witnesses of the seismic history of the centre of Athens. In: Scientific project report, John Latsis Public Benefit Foundation (In Greek)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.National Technical University of AthensAthensGreece
  2. 2.Geodynamic InstituteNational Observatory of AthensAthensGreece
  3. 3.Acropolis Restoration ServiceHellenic Ministry of CultureAthensGreece

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