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İnşaat Mühendisliği Bölümü

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Browsing İnşaat Mühendisliği Bölümü by Journal "15 WCEE"

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    Citation Count: Kazaz, İ.; Gülkan, Polat; Yakut, A. "Examination of code performance limits for shear walls", 15 WCEE, 2012.
    Examination of code performance limits for shear walls
    (2012) Kazaz, İ.; Gülkan, Polat; Yakut, A.; 5743
    Recently proposed changes to modeling and acceptance criteria in seismic regulations for both flexure and shear dominated reinforced concrete structural walls suggest that a comprehensive examination is required for improved limit state definitions and their corresponding values. This study utilizes a well calibrated modeling tool to investigate the deformation measures defined in terms of plastic rotations and local concrete and steel strains at the extreme fiber of rectangular structural walls. We compare requirements in ASCE/SEI 41, Eurocode 8 and the Turkish Seismic Code. This way, a critical evaluation of the requirements embedded in these documents becomes possible. It is concluded that the performance limits must be refined by introducing additional parameters. Significant recommendations are provided for Eurocode 8 and the Turkish Seismic Code.
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    Citation Count: Akansel, Vesile Hatun; Yakut, Ahmet; Gülkan, Polat. "Fragility of Shear Wall Buildings with Torsional Irregularity", 15 WCEE, 2012.
    Fragility of Shear Wall Buildings with Torsional Irregularity
    (2012) Akansel, Vesile Hatun; Yakut, Ahmet; Gülkan, Polat; 5743
    Fragility curves are useful for damage assessment of structures. There are many criteria that affect the reliability of fragility curves such as transitional damage states, plan irregularity and different measures of seismic intensity. Determination of fragility of a shear wall structure is important, especially for installations that have torsional irregularity. In this study fragility curves of a shear wall building with torsional irregularity have been obtained. This building was subjected to synthetic earthquake motions on the AZALEE shaking table under the coordination of CEA (Commissariat à l’Energie Atomique) and Electricité de France (EDF) in Saclay, Paris under the scope of the SMART program. Maximum inter-story drift values have been used as the damage indicator to obtain the fragility curves and different seismic intensity measures such as PGA, PGV, PGD and CAV have been used. Thirty bi-directional horizontal ground motions have been applied for the time history analyses. These synthetic acceleration sets applied to the structure have different amplitudes in the range of 0.1 to 1 g. Micro modeling approach has been used to obtain reasonably accurate and consistent results with experiments. ANSYS finite element software has been used for the response history analyses. Fragility curves of shear wall building have been calculated according to pre-established damage indicators. The limits are light, controlled and extended damage indicators. These curves are compared with those of the HAZUS damage states for correlation.