Hagia Sofia Investigation

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13th World Conference on Earthquake Engineering Vancouver, B.C., Canada August 1-6, 2004 Paper No. 2652 STRUCTURAL AND EARTHQUAKE RESPONSE ANALYSIS OF THE LITTLE HAGIA SOFHIA MOSQUE Kadir GÜLER 1, Ahmet SAĞLAMER2 , Zekai CELEP2 , Ferhat PAKDAMAR3 SUMMARY In this study, the structural and earthquake response of the Little Hagia Sophia Mosque (Kucuk Ayasofya Camii) of Istanbul is investigated. The building has lived several earthquakes, various parts of the building were damaged, plasters fell and cracks appeared in the walls and in the main dome. Recently, a large scale restoration has been started by the Great Municipality of Istanbul. Within this activity, the building is investigated in detail and soil testing is been carried out to identify the properties of the soil. This paper presents the primary results of the structural and earthquake response analysis of the historical building within the development of appropriate methods and techniques for repair and strengthening of the Little Hagia Sophia Mosque. A brief discussion is presented for possible strengthening of the foundation and the structure of the historical building. INTRODUCTION The Little Hagia Sophia Mosque (Kucuk Ayasofya Camii) is one of the oldest historical buildings in Istanbul. In fact the building is also known as Sergius and Bacchus Church which was converted to a Mosque following the Ottoman conquest of the city. It remains the oldest surviving Byzantine monument in Istanbul. Due to numerous internal and external alterations as well as natural disasters that have occurred since its construction, severe cracks, especially in its dome and vaults have developed. The building has been subjected to a number of earthquakes of different level of intensities. The side walls, the vaults and the main dome of the building were damaged partly by cracks appeared at the periphery walls of the

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