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SERHATOĞLU, CAVİT

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SERHATOĞLU

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    Publication
    Dynamic characteristics of minarets of hoca tabip mosque
    (Ediciones Univ Oviedo, 2015-01-01) Livaoğlu, Ramazan; Baştürk, Mehmet Hudai; Serhatoğlu, Cavit; Doğangün, Adem; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; LİVAOĞLU, RAMAZAN; SERHATOĞLU, CAVİT; DOĞANGÜN, ADEM; Uludağ Üniversitesi; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; 0000-0001-8484-6027; 0000-0002-1867-7103; AAH-4411-2021; AAR-6126-2020; M-6474-2014; S-4676-2019
    With its thousands of years of history and traces from the past, Bursa is an open-air living history museum. Unfortunately Bursa is located in the earthquake zone and many catastrophic earthquakes occurred in the past. From inscriptions, it is learned that great majority of historical buildings like mosques, madrasahs, inns were damaged by the latest earthquake occurred in 1855. Because of their slender form, minarets were influenced much more than the other structures.Because one of the most important component of liabilities of our society is to preserve and transfer this historical heritage to our posterity, another problematic issue arise on this subject is the lack of literature about minarets. This is because that minarets were built in only Islamic regions. Furthermore, literature review shows that there are only a few scientific studies about seismic behavior of this type of structures. For the mentioned reasons, in this study, dynamic characteristics of Hoca Tabip Mosque which was built in 15th century, were evaluated. One of the in situ tests, modal analysis technique was carried out and the dynamic characteristics of the minaret were captured. At the same time the construction techniques were investigated. These results were compared with those obtained from the numerical model of minaret which was constituted using in situ size measuring. Finally, it was seen that the results from two approaches correspond to each other. In conclusion, it is shown that the numerical model which was carried out in this study represent actual structure with high accuracy.
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    Publication
    Dynamic identification of monumental and historical minaret of the sehadet
    (Ediciones Univ Oviedo, 2015-01-01) Serhatoğlu, Cavit; Livaoğlu, Ramazan; Bağbancı, Bilal; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; SERHATOĞLU, CAVİT; LİVAOĞLU, RAMAZAN; Uludağ Üniversitesi; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; 0000-0001-8484-6027; AAH-4411-2021; S-4676-2019; M-6474-2014
    Modal analysis has been used in three decades in the civil engineering disciplines in order to solve complex structural dynamic problems. In this study, dynamic parameter such as fundamental frequency, mode shapes and damping ratios of minaret of Sehadet mosque, historical masonry minaret, was investigated using operational modal analysis method. However; dynamic character identification of historical masonry minarets are considerably difficult for Structural Health Monitoring. The historical masonry minarets have complicated stiffness, heterogenic element material and direct indeterminable boundary conditions. Thus, scope of this study, ambient vibration test which is measure in-situ tests were carried out for determination of dynamic characteristics with the aid of accelerometers and appropriate analysis programs. In order to achieve the modal analysis- frequency domain, Peak-picking method was employed in derivation of modal data from frequency response function data. In addition ultrasound test was performed to the material taken from minaret elements, which is coarse (kufeki) stone and laboratory test was made to the stone sample for the characteristic properties of material. Thereby, only few criteria such as boundary conditions and mesh control calibration was made for the correct model of the minaret. Three dimensional finite element model was designed for the minaret using finite elements analysis program, ABAQUS. The results obtained from a finite element analyses of the minaret were compared with results of experimental approach. Finally, it can be easily stated that the proposed finite element models themselves are the meritorious approximations to the real problem, and this makes the model appealing for use in comprehensive investigations.