Browsing by Author "FraileDeLerma, A"

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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.
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.
Effect of infill walls and plaster for a four storey r/c building
(Ediciones Univ Oviedo, 2015-01-01) Kaplan, Onur; Güney, Yücel; Doğangün, Adem; Livaoğlu, Ramazan; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; DOĞANGÜN, ADEM; LİVAOĞLU, RAMAZAN; Uludağ Üniversitesi; Aenlle, ML; Pelayo, F; Canas, FJC; Prieto, MG; Hermanns, L; Rey, MJL; FraileDeLerma, A; Canteli, AF; 0000-0002-1867-7103; 0000-0001-8484-6027; AAR-6126-2020; S-4676-2019; M-6474-2014
Infill walls are non-structural elements, which are mainly used for architectural purposes. Besides contribution of infill walls is ignored during the structural analysis, the effect of the infill walls are usually taken into account through the application of additional loads and masses appropriately distributed along the interfaces between the surrounding frame and the infill walls. In doing so, the stiffness and strength contribution of the latter elements as well as their interaction with the members of the Reinforced Concrete (RC) frame are also ignored. Practically some of the earthquake design codes like Turkish code neglect the effects of the non-structural infill walls. However the presence of infill walls significantly increases the stiffness and the strength of a frame. The reasons of this increment are high in-plane stiffness of infill and the composite action of the infill and the frame. On the other hand, plastering significantly affects the behaviour of infill walls. Thus, the dynamic characteristics of a building also affected by the mu 11 walls of building having plaster or not.The objective of this study is selected to compare the behaviour of mull walls with and without plaster by focusing on dynamic characteristics of a 4-storey residential R/C building in Eskisehir, Turkey. Natural periods, mode shapes and damping ratios of the building were determined for two different construction stages by using ambient vibration test. To obtain experimental dynamic characteristics, Enhanced Frequency Domain Decomposition (EFDD) technique was used. These 4-storey residential R/C building is located in Eskisehir, Turkey. The investigated building in which seismic loads are jointly resisted by frames and structural walls. There are only one shear wall along x-direction and four shear walls along y-direction. The floor area of the building is 400 m(2) and story heights are 2.83 m. Total area of infill walls for one storey are 5.44 m(2) and 10.75 m(2) at x-direction y-direction, respectively.As a result of this study, vibration measurements are established that, plaster significantly changed the dynamic characteristics of building. Decrease in the periods both x and y directions and also torsional period showed that the plaster increases the lateral stiffness of the infill walls and thereby it increased the lateral stiffness of the building.