Evaluation of the use of photogrammetric modelling technique in structural analysis of historical buildings on the examples of Melik Mahmut Mosque and Mardin Great Mosque of Artuqid period


Thesis Type: Doctorate

Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2023

Thesis Language: Turkish

Student: İzzettin KUTLU

Supervisor: Asena Soyluk

Abstract:

Historical buildings generally have complex and unique geometries. This thesis aims to evaluate the use of photogrammetric modelling technique for the determination of the structural performance of historical buildings in all aspects. In the structural modelling process, Melik Mahmut Mosque and Mardin Ulu Mosque, two Artuqid buildings under the influence of the Eastern Anatolian Fault System (EAFS), were considered in detail. In order to identify the problems that can occur during the modelling process, firstly simple structural elements were analysed by inductive method and secondly large-scale structures were modelled. In the thesis, photogrammetric models were obtained from exterior images and therefore no interior data were generated. This situation necessitated an integrated process with the classical modelling technique in enclosed structures for simulating the real behaviour of the building. Using the classical modelling technique, the structural elements in the interior of the mosques were integrated into the photogrammetric models. Analyses were performed on the integrated models and the resulting values were presented. Especially, the period values in the modal analysis results showed approximately 95% similarity with the classical models. With the results of the analysis, it was determined and evaluated in which cases different modelling techniques would provide advantages and in which cases would cause disadvantages. As a result, information on a different modelling approach has been presented to the researchers in terms of the methods of accurately analysing the structural behaviour of historical buildings. Photogrammetric modelling technique has been evaluated as an important documentation and modelling method enabled by today's technology, not only determining the structural behaviour of historical buildings, but also integrated into classical modelling techniques and provide current data. Because of the difficulty in identifying the physical, chemical and mechanical properties of historical building materials and the inability to predict the effects of construction techniques on structural behaviour, a standardised structural modelling process cannot be managed. Therefore, it is crucial to develop methods and techniques that can provide fast data to the process. Many historical buildings in Anatolia are under threat due to natural disasters, vandalism and time-related deterioration. In this regard, it is a professional responsibility in terms of architectural and engineering ethics to develop strategies for their documentation and preservation within the possibilities offered by technology.

Key Words : Photogrammetry, finite element model, structural analysis, structural behavior, Artuqid architecture