PSI - Issue 79

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ScienceDirect

Procedia Structural Integrity 79 (2026) 161–167

28th International Conference on Fracture and Structural Integrity - 3rd Mediterranean Conference on Fracture and Structural Integrity Seismic behaviour of ancient colonnades interacting through a diaphragmatic roof Vrouva Antigone a,b *, Konteas Z. b , Skaris K. b , Christodoulopoulou R. b a National Technical University of Athens, School of Civil Engineering, Department of Structural Engineering, Laboratory of Earthquake Engineering, Polytechnic Campus, Heroon Polytechniou9, 15780 Zografou, Greece b Hellenic Ministry of Culture and Sports, Acropolis Restoration Service, Polygnotou 10, 10555 Athens, Greece Abstract In ancient monuments the space between the colonnade of the peristyle and the colonnade of the prostylon (prostasis) is usually covered with a marble coffered roof. The same applies in the case of the Parthenon of the Athenian Acropolis. This current numerical study aimed to establish whether this roof, though it was just resting on the colonnades without being attached to them, accounted for a diaphragm providing some kind of interaction between the independent colonnades during seismic events as it was intuitively expected. The case of the west pteron roof of the Parthenon was considered, under the scenarios of its restoration. This initial study provides the guideline for attempting a more thorough study on the rehabilitation of the columns for both colonnades, considering the actual preservation state due to a plethora of damages the temple suffered in its long course of existence of approximately 2500 years. Three models were considered for the numerical analysis. In all of them the actual layout of the peristasis colonnade was considered along with the prostasis colonnades and part of the north south and west wall of the cella. The first model accounts for the current state of the monument, i.e. without the west pteron roof. The second model accounts for the restoration of the grid of marble beams that hold the marble coffers of the roof. The third model accounts for the full restoration of the coffered roof. The numerical model includes the actual number of architectural blocks without damages (rigid blocks) and well fitted together (closed joints). The base of the structure was considered rigid and uniform in the level of the pavement. For the analysis the discrete element method was used (the 3DEC 5.0 code by Itasca), according to which every architectural block is considered as individual and rigid, while all deformation occur in the joints (interfaces) of the blocks. The method used has been validated with actual accelerograms from the accelerographs' network established on the rock of Acropolis and on the Parthenon in particular.

* Corresponding author. Tel.: +30-694-549-8553; fax: +30-210-331-0745. E-mail address: a_vrouva@hotmail.com

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of IGF28 - MedFract3 organizers 10.1016/j.prostr.2025.12.320