Browsing by Author "Çetinkaya N."

Now showing 1 - 3 of 3
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    A new strong floor-reaction wall system without gallery for experimental studies in structural mechanics
    (2009) Kaplan H.; Gönen H.; Nohutcu H.; Çetinkaya N.; Yilmaz S.
    Strong floors and reaction walls are important elements of structural mechanics laboratories. They should be designed before the construction of the laboratory building for efficiency. They have a gallery used for the anchorage of the test models and storage of test equipment. In this paper, a strong floor without a gallery has been designed for an existing laboratory facility. The anchorage system has been designed to fix the model structures to the strong floor. Design issues of strong floor and reaction floor systems are mentioned in the scope of the paper. The construction of the system is simple and economical and provides a comfortable environment for experimental studies © Shiraz University.
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    Seismic strengthening of pin-connected precast concrete structures with external shear walls and diaphragms
    (Precast/Prestressed Concrete Institute, 2009) Kaplan H.; Nohutcu H.; Çetinkaya N.; Yilmaz S.; Gönen H.; Atimtay E.
    Pin-connected precast concrete structures are widely used in some European countries of moderate seismicity. However, this structural system is not earthquake resistant because it does not have enough lateral stiffness or lateral-load resistance. Lack of a rigid diaphragm at the roof level imposes severe forces to connections. It is difficult to strengthen such buildings with conventional strengthening techniques because buildings must be unoccupied before retrofitting, which building owners do not like. To overcome this difficulty, employment of external shear walls and a diaphragm at roof level are proposed in this study. A typical pin-connected precast concrete frame and a strengthened structure with the proposed method were tested under imposed, reversed, cyclic drift of constant rate. The experimental study showed that the proposed method increased lateral stiffness, lateral-load resistance, and seismic energy dissipation and provided a diaphragm effect for the structure.
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    A new method for strengthening of precast industrial structures; [Prefabri̇k endüstri̇ yapilarinin güçlendi̇ rmesi̇ i̇çi̇n yeni̇ bi̇r yöntem]
    (2009) Kaplan H.; Yilmaz S.; Çetinkaya N.; Nohutcu H.; Atimtay E.; Gönen H.
    1998 Ceyhan and 1999 Marmara Earthquakes causes extensive damages of the precast industrial structures. This type of structures is important economically. They do not have enough lateral rigidity, lateral load capacity and a rigid diaphragm. Several strengthening techniques have been applied to those type of structures. However, minimization of the disturbance during the strengthening of these structures is an important research issue as considerable economic losses are to be happen while building remains out-of-service. In this study, effectiveness of the strengthening with external shear walls and rigid diaphragm is investigated experimentally. A typical precast concrete frame and a strengthened structure with proposed method are tested under reversed cyclic loads. Experiments showed that proposed method improves lateral stiffness, base shear capacity and provides an efficient diaphragm behavior to the structure.