Master Degree / Yüksek Lisans Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/11147/3008

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Publisher: search.filters.publisher.Izmir Institute of TechnologySubject: search.filters.subject.Structural analysis (Engineering)

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Now showing 1 - 3 of 3
  • Master Thesis
    Seismic Vulnerability Assessment of Bergama Bedesten
    (Izmir Institute of Technology, 2022) Aktaş, Engin; Hamamcıoğlu Turan, Mine; Turan, Mine; Aktaş, Engin; 02.01. Department of Conservation and Restoration of Cultural Heritage; 03.03. Department of Civil Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology; 02. Faculty of Architecture
    This study aims to document Bergama Bedesten with emphasis on its construction technique and material usage; and assess its structural condition for future seismic action through numerical analysis. The monument (15th -16th century) is unique among the historical trade buildings at the center of Bergama, İzmir. It is revealed that the structure is a rare example by the use of plane triangles as transition elements, the oculi placement in domes, and the thickening application at parts where load-bearing arches integrate into the walls and at the corners. In order to investigate the vulnerability of the building, numerical analysis using the finite element method was conducted in ANSYS software. According to the Turkey Building Earthquake Code (2018), single-mode equivalent earthquake analysis considering the horizontal elastic design spectrum of the site was carried out for x and y directions, separately. The maximum principal stress concentration locations obtained through analyses point vulnerable zones. These were specifically observed on load-bearing arches, on some plane triangles, on the transition zones, at dome parts close to the transition zone and peak level, at the parts where arches integrate to the walls, around top windows, on the west entrance door arch, and on a secondary door arch in the north wall. The method comparing the structural failure mapping and visual structural alterations analysis of architectural restoration with finite element model results, emphasizes that some damaged or altered portions in the current state are in seismically vulnerable spots. Some precautions, further studies and interventions were suggested for these locations.
  • Master Thesis
    The Concept of Equilibrium and Its Effects of Change From Static To Dynamic on Architectural End-Products
    (Izmir Institute of Technology, 1999) İnceköse, Ülkü; İnceköse, Ülkü; Eyüce, Emine Özen; Eyüce, Özen; 02.02. Department of Architecture; 02. Faculty of Architecture; 01. Izmir Institute of Technology
    All of the objectslbuildings on the earth can stand due to their structural orders.Standing of a structural order without suffering any damage (broken down, collapsing ... ) is the result of their state of equilibrium. The most important factor effecting the state of equilibrium of any structural order is the force of gravity.Differantiation in the structural orders formed under this stable effect can be explained by the change in the concept of equilibrium. Therefore, analysing the change in architectural and engineering end-products could only be done by understanding the change in the concept of equilibrium.Scientific developments are the basic factors causing the changes in the concept of equilibrium. Reflections of these developments on concrete products is both in the types of load transfer of structural order and in visual expression of order.Consequently, in the scope of the thesis, depending on developments in the science reflections of the change in the concept of equilibrium on concrete products is tried to be explained by structural and geometrical analses. Expression of these analyses are made through the relationship between equilibrium and movement. It is concluded that the change in the structural orders basing on an acceptance of basic physics that "an object is either stable or movable "; is from structures having no motion to structures having any kind of motion (having tendency to move and/or moving). In other words, it can be said that, this change is from immobile structures having whole connection with the ground, to structures trying to remove from the ground.At the end, in today, it is possible to discuss about solutions having different equilibrium orders that is seen/will be seen basing on scientific developments.Generally it is possible to classify these solutions as solutions that can be expressed by different geometrical orders or solutions towards to be independent from the force of gravity.in the light of these determinations the aim of the thesis is to determine changes in the concept of equilibrium and to analyse their effects on structural end-products and to give some clues about their future effects.Keywords: Structural equilibrium, structural balance, gravity, geometry, energy, structural order.
  • Master Thesis
    Nonlinear Finite Element Analysis of Reinforced Concrete Structures Subjected To Impact Loads
    (Izmir Institute of Technology, 2010) Cağaloğlu, Neriman Çare; Saatcı, Selçuk; Saatcı, Selçuk; 03.03. Department of Civil Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    Design of reinforced concrete structures against extreme loads, such as impact and blast loads, is increasingly gaining importance. However, due to the problem.s complicated nature, there exists no commonly accepted methodology or a design code for the analysis and design of such structures under impact loads. Therefore, engineers and researchers commonly resort to the numerical methods, such as the finite element method, and utilize different methods and techniques for the analysis and design. Although each method has its advantages and disadvantages, usually engineers and researchers persist on their method of choice, without evaluating the performance of other methods available. In addition, there is no significant study in the literature comparing the methods available that can guide the engineers and researchers working in the area. This study compares the performance of some numerical methods for the impact analysis and design with the help from actual impact test results in the literature. Computer programs VecTor2 and VecTor3 were selected for nonlinear finite element methodology, which were based on the Modified Compression Field Theory. Impact tests conducted on reinforced concrete beams were modeled and analyzed using these programs. Moreover, same beams were modeled also using a single degree of freedom spring system method. The results obtained from both approaches were compared with each other and the test results, considering their accuracy, computation time, and ease of use.