Person:
YAZICI, GÖKHAN

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Dr. Öğr. Üyesi

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YAZICI

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GÖKHAN

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Now showing 1 - 4 of 4
  • Publication
    Dynamic behavior and optimization of offshore gravity platforms
    (ASME-AMER SOC MECHANICAL ENG, THREE PARK AVE, NEW YORK, NY 10016-5990 USA, 2005-05) Mastanzade, Nıjat S.; YAZICI, GÖKHAN
    This paper presents the results of a dynamic investigation with the aim of determining both the optimal shape of an offshore gravity platform column and the required mass of the infill water The natural frequency formulation of the structure with the added infill water mass, E-r, was obtained by using Rayleigh's method. Pontyagin's maximum variational principle was used to define the shape of the column. An algorithm and a computer program were developed to obtain the numerical solution of, the problem. Finally, a scaled model of the gravity platform was built and tested, in order to verify the results obtained from the analytical research and to determine the mass of the. infill water.
  • Publication
    Case Study: Izmit Domestic and Industrial Water Supply Build-Operate-Transfer Project
    (ASCE-AMER SOC CIVIL ENGINEERS, 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA, 2004-06) Şentürk, H. A.; Kaplanoğlu, S. B.; YAZICI, GÖKHAN
    The "build, operate, and transfer model" (BOT) is a financing model, which is used in many developing countries to finance new infrastructure projects with private sector participation. The BOT method foresees the financing, designing, building, operating, and managing of the facility by the private sector and then its transfer free of charge, to the owner after a predetermined concession period. For interested parties, the history of BOT laws and projects in Turkey is presented as an Appendix. In this study, the Izmit Domestic and Industrial Water Supply Project, the biggest privately financed water Supply project procured under the BOT model in the world at the time and the first in Turkey will be introduced and the problems that arose during the implementation of the project, namely, the scope of the project, equity debt ratio, return on equity, principles of accounting, coordination of State departments, land access, determination of the optimum operation period, and the sale price of the water, will be presented and suggestions will be given on how to deal with these problems.
  • Publication
    Dynamic behaviour of seismically isolated cylindrical offshore storage tanks
    (AMER SOC MECHANICAL ENGINEERS, THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA, 2005) Mastanzade, Nijat; YAZICI, GÖKHAN
    Cylindrical offshore storage tanks are mainly used to store critical liquids such as petroleum and LNG. Failure of these tanks after an earthquake not only results in high financial losses but can also create an environmental disaster as well. Seismic isolation technique has been utilized in this study to mitigate the damaging effects of lateral earthquake forces. In this study, seismic isolation is used in cylindrical offshore storage tanks. Seismic isolators are protected from the marine environment by a water-proof flexible membrane that allows the horizontal movement of the tank. The mathematical model takes the following into account: mass of the stored liquid, added mass of the water surrounding the tank, horizontal stiffness and damping of the isolation system. Internal forces due to the hydrostatic and hydrodynamic forces acting on the system during an earthquake have been calculated by using the shell-moment theory. The results of the analyses are compared for both the isolated and fixed-base tanks.
  • Publication
    SAR Design with IFC
    (Crc Press-Taylor & Francis Group, 6000 Broken Sound Parkway Nw, Ste 300, Boca Raton, Fl 33487-2742 Usa, 2009) TÜRKYILMAZ, EMRAH; YAZICI, GÖKHAN; TR140840; TR113480
    This paper reports a study where IFC based building models were utilized in the evaluation of "adaptability" issues of dwelling layouts in an educational context. The first part of the study discusses a workshop on the CAD implementation of the SAR design methodology, which was popularized in Netherlands in the post-WW2 era, to increase the adaptability of residential dwellings. The second part of the study focuses on the use of IFC based building models to automate the preparation of the SAR taxonomy explained in the workshop. The primary objective of using IFC in this study was to explore the potential use of this maturing technology in design research education.