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Title: Investigation of the structural behaviour of a masonry castle by considering the actual damage

Authors: Maria E. Stavroulaki; Georgios A. Drosopoulos; Efstathia Tavlopoulou; Nikos Skoutelis; Georgios E. Stavroulakis

Addresses: Applied Mechanics Laboratory, School of Architecture, Technical University of Crete, GR-73100 Chania, Greece ' School of Civil Engineering, University of KwaZulu-Natal, 4041 Durban, South Africa ' School of Architecture, Technical University of Crete, GR-73100 Chania, Greece ' School of Architecture, Technical University of Crete, GR-73100 Chania, Greece ' School of Production Engineering and Management, Technical University of Crete, GR-73100 Chania, Greece

Abstract: The structural behaviour of Frangokastello, a mediaeval masonry castle located in Crete, Greece is studied. The structure presents several damaged areas, consisting of cracks and local failure of masonry. The finite element method (FEM) is used to investigate how the existing failure of the structure affects its mechanical response. First, an eigenvalue analysis of the structure without the cracks and a dynamic modal analysis are done. Then, a non-linear constitutive model using a smear crack law is used to investigate the limit state of the structure under static and dynamic loading. Finally, unilateral contact interfaces are introduced, to simulate the cracks which appear in the structure. This model, which consists of several non-linearities, is tested under non-linear time history analysis. Comparison of the results demonstrates how the pathology of the structure affects its response. This procedure is necessary towards taking actions for the reinforcement of the structure.

Keywords: masonry; crack; dynamic analysis; unilateral contact; finite element analysis; modal analysis; time-history analysis of structures; rehabilitation of monuments; structural evaluation of damaged structures.

DOI: 10.1504/IJMRI.2018.089046

International Journal of Masonry Research and Innovation, 2018 Vol.3 No.1, pp.1 - 33

Available online: 20 Dec 2017 *

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