Lake Polyfytos Bridge

The Servia High Bridge (Greek: Υψηλή Γέφυρα Σερβίων, romanized: Ypsili Gefyra Servion) is one of the longest bridges in Greece, with a length of 1,372 m.^[1] Construction began in 1972 along with the Ypsili Gefyra Servion artificial lake and was completed in 1975.

West Macedonia. The bridge over the Polyphytos artificial lake of the river Aliakmonas in Kozani regional unit.

Designed by Riccardo Morandi, was constructed from a joint venture Xekte SA–Skapaneus SA.^[2]

The bridge is a part of the GR-3/E65 (Athens - Lamia - Larissa - Kozani - Florina) and is located 15 km southeast of the city of Kozani and 5 km northwest of Servia. It is one of the two bridges of the lake; the other is the Rymnios Bridge to the southwest near Aiani and is smaller, with 615 m length.

Structural issues raised in 2020

In January 2020, and after visual inspections conducted by professor Stergios Mitoulis of infrastructuResilience, it was found that ageing, environmental stressors and increase in the traffic loads on the bridge potentially led to safety issues. Amid these concerns, traffic restrictions were enforced on the bridge. These preventive measures aimed to reduce the maximum load on the bridge and included banning vehicles heavier than 50 tonnes and reducing the vehicle speed limit to 40 kilometers per hour.^[3]

Professor Mitoulis noted following the inspection of the bridge that there were “vertical displacements on some of the bridge spans that are visible” and that “central simply supported segments of the deck are not well connected to the balanced cantilevers of the deck and hence there is a risk of falling.” Professor Mitoulis also explained that the simply supported spans need to be connected to the balanced cantilevers, whilst the movement of the latter seems to be the main issue that needs urgently addressing.^[4] Further studies included a recent publication^[5]

The bridge had been inspected in the past from the relevant ministry in 1995 after the Kozani earthquake, and again in 2012.^[6]

Gallery

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  The bridge of Polyphytos lake.

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  Polyphytos lake.

References

1. Νομός Κοζάνης / Τεχνητή Λίμνη Πολυφύτου
2. "Handbook of International Bridge Engineering"
   Edited by Wai-Fah Chen, Lian Duan
   2013 - CRC Press - ISBN 9781439810293
   page 520: 12.3.6.2.2 Servia Bridge
3. https://neoskosmos.com/en/156103/concerns-force-traffic-restrictions-on-greeces-second-longest-bridge/^{[bare URL]}
4. http://www.infrastructuresilience.com/lake-polyfytos-bridge/^{[bare URL]}
5. Markogiannaki, Olga; Xu, Hang; Chen, Fulong; Mitoulis, Stergios; Parcharidis, Issaak (2022). "Monitoring of a landmark bridge using SAR interferometry coupled with engineering data and forensics". International Journal of Remote Sensing. 43 (1): 95–119. Bibcode:2022IJRS...43...95M. doi:10.1080/01431161.2021.2003468. S2CID 245204794.
6. "Να ξεκινήσει η κατασκευή νέας γέφυρας στη λίμνη Πολυφύτου προτείνει ο περιφερειάρχης-Γιώργος Κασαπίδης: «Η γέφυρα αυτή έχει την κατασκευή του Μοράντι , της γέφυρας που έπεσε στη Γένοβα» - Πρωινός Λόγος Κοζάνη". Πρωινός Λόγος (in Greek). 2020-01-13. Retrieved 2020-02-08.

40°13′58″N 21°58′26″E / 40.23278°N 21.97389°E / 40.23278; 21.97389