Master Degree / Yüksek Lisans Tezleri

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

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Access Right: Open AccessSubject: search.filters.subject.Reinforced concrete construction

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Now showing 1 - 4 of 4
  • Master Thesis
    Earthquake Response of R/C Frames With Reinforced Infill Walls
    (Izmir Institute of Technology, 2008) Yıldırım, Umut; Turan, Gürsoy
    Most of the reinforced concrete structures that are built in the past few decades are in lack of ductility and lateral stiffness. In the content of the present work, a fast and economical remedy was searched to rehabilitate these type of buildings that are under high risk of earthquake damage.The strengthening technique needs to be finished in a short time without the people that live inside the buildings to move out. Furthermore, the chosen strengthening technique needs to be economical enough so that the home owner would not hesitate in making a decision of the rehabilitation.In regard of the above mentioned two criteria, existing infill clay brick walls may be strengthened by the addition of a wire mesh on the surface together with a layer of plaster. In order to investigate its effectiveness, a numerical investigation is carried out to study the behaviour of a strengthened infilled reinforced concrete (RC) frame using wire mesh under lateral reversed cyclic loading. A single span, one-story clay brick infilled RC frame is modeled and a nonlinear analysis is made.The analysis results indicate that the technique of strengthening with wire meshincreased the peak lateral load, ductility and energy dissipation.
  • Master Thesis
    The Interaction of Reinforced Concrete Skeleton Systems Andarchitectural Form Subjected To Earthquake Effects
    (Izmir Institute of Technology, 2010) İnan, Tuğba; Korkmaz, Koray
    3 The interaction of architectural form and structural configuration has become a serious issue in the building industry because of the poor seismic performance of reinforced concrete buildings in Turkey. Therefore, it has a determinative role on earthquake behaviour of buildings. The study focuses on R/C skeleton systems which are commonly constructed in building industry of Turkey. In this study, structural irregularities in plan and vertical direction have been investigated in detail based on Turkish Earthquake Code, 2007. Four main cases are generated based on each structural irregularity in plan. These cases consist of 29 main parametric models and totally 265 models with sub models. They are designed as to have symmetrical or asymmetrical plan geometry and regular or irregular rigidity distribution. All models are analyzed by using the structural analyzing software, IdeCAD Static 6.0055. The changes in the earthquake behaviour of buildings were examined according to the number of stories, number of axes, configuration of structural elements, floor openings, projections in plan and vertical direction. Many findings are obtained and assessed as a result of the analysis for each structural irregularity. The most remarkable result shows that structural irregularities can be observed in completely symmetric buildings in terms of plan geometry and rigidity distribution due to the inaccurate structural system selection. Moreover, it has emerged that symmetry in the rigidity distribution is more important than the symmetry in the plan geometry.
  • Master Thesis
    Behavior of Reinforced Concrete Slabs Subjeted To Impact Loads
    (Izmir Institute of Technology, 2013) Batarlar, Baturay; Saatcı, Selçuk
    This study presents the findings of an experimental program designed for investigating the behavior of RC slabs under low-velocity impact loads. Six RC slabs with dimensions 2015x2015x150 mm were tested at the Structural Laboratory of the Izmir Institute of Technology. To facilitate a comparison between the static and impact behavior of identical specimens, the slabs were cast in three identical pairs, such that one of the specimens was tested under impact loads whereas its identical twin was tested under static loads. To test the slabs under simply supported conditions, an innovative impact test setup was designed and manufactured, supporting the specimens at 20 locations along the perimeter and holding the specimens in place during the impact induced rebound. This setup was also used for the testing of the specimens under monotonically increasing static loads at the midpoint. Impact loads were induced on the specimens by a free falling drop-weight, impacting the specimens at the midpoint. The specimens were intensely instrumented with 20 load cells at each support location, 24 displacement transducers, 6 accelerometers and 12 strain gauges fixed to the reinforcing bars. Dynamic data was captured with the help of a high speed data acquisition system, capturing and recording the data at a rate of 250 kHz per channel. The results obtained from these tests revealed that the impact behavior of slabs differs significantly compared to their static behavior. Displacement profiles and force distributions are highly affected due to the high inertia forces during the impact.
  • 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
    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.