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Hydrodynamic pressures acting on the walls of rectangular fluid containers
Dogangun, Adem,Livaoglu, Ramazan Techno-Press 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.2
The dynamic response characteristics of a rectangular fluid container are investigated by using finite element method. The fluid is assumed to be linear-elastic, inviscid and compressible. A displacement-based fluid finite element was employed to allow for the effects of the fluid. A typical rectangular fluid container, which is used in recent studies, is considered for the numerical analysis. The North-South component of El Centro Earthquake records is used as input ground acceleration. Rigid and flexible fluid containers solutions are obtained for the chosen sample tank. Hydrodynamic pressures and sloshing motions are determined using Lagrangian fluid finite element. The results obtained from this study are compared with the results obtained by boundary-finite element method (BEM-FEM) and requirements of Eurocode-8. Based on the numerical analysis, some conclusions and discussions on the design considerations for rectangular fluid containers are presented.
Response evaluation of historical crooked minaret under wind and earthquake loadings
Ural, Ali,Dogangun, Adem,Meraki, Sakir Techno-Press 2013 Wind and Structures, An International Journal (WAS Vol.17 No.3
Turkey has been hosted various civilizations throughout centuries and it has become one of the oldest settlements all over the world due to the geographical location. Therefore, it has accommodated innumerable historical structures remain from the past civilizations. Protection and conservation of these historical constructions should be the major points for continuity of history. Crooked minaret is one of between these historical invaluable structures. It is located at the city of Aksaray and it dates back approximately 800 years. The minaret has lost its vertical position in time and bends on the North-West direction. In this study, general information is given about minarets and some restoration recommendations are given for crooked minaret based on performed some finite element structural analyses. These analyses are considered into three cases; 1-Dead loading, 2-Wind loading, and 3-Earthquake loadings. Results from the analyses are discussed detailed and some useful recommendations are given in the end of the study.
Seismic Assessment of a Historical Masonry Mosque by Experimental Tests and Finite Element Analyses
Ferit Cakir,Burcin S. Seker,Ahmet Durmus,Adem Dogangun,Habib Uysal 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.1
The mosques are the most important pieces of Islamic culture in terms of their architectural and structural properties. Although,thousands of these mosques are still being used all over the world, many historical mosques are at risk in terms of seismic events. This study mainly focuses on historical Lala Pasha Mosque, which is located in the city center of Erzurum, Turkey. The main purposeof this study is to assess the structural behaviors and to investigate the architectural features and components of the mosque. Thestudy was carried out in two main steps. Firstly, compression and three-point bending tests on the construction materials wereconducted to determine the mechanical properties of the materials. In the second step, a three-dimensional finite element model of themosque was developed and structural responses for the model were investigated by means of static and dynamic analyses. The resultsof the analyses show that the most critical parts of the mosque are the dome, pulley, and the supports of the main arch structures thatcarry the main dome. Additionally, the dynamic analyses prove that the most critical parts of the mosque are the sub-sections of themain columns, the window edges, and small domes.