Yazar "Kocakaplan Sezgin, Sedef" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    A STUDY ON PULSE CHARACTERISTICS OF 06.02.2023 KAHRAMANMARAS EARTHQUAKES
    (International Association for Earthquake Engineering, 2024) Kocakaplan Sezgin, Sedef; Ahmadi, Ehsan; Georgantzia, Evangelia; Mehdi Kashani, Mohammad Mehdi
    On February 6, 2023, two destructive earthquakes occurred with magnitudes of Mw = 7.7 in Pazarcik (Kahramanmaras, Turkey) and Mw = 7.6 in Elbistan (Kahramanmaras, Turkey), respectively. The earthquakes caused loss of lives and properties (heavy damage and collapse of structures). In the scope of this study, a multi-pulse decomposition method of ground motions is used to investigate the time-position, frequency, amplitude, pulse width, and phase angle of the wave packets. The investigation focuses particularly on time-localization, period, and amplitude of the extracted pulses using two ground motion ensembles: 103 ground motions from the Pazarcık earthquake and 79 ground motions from the Elbistan earthquake. The elastic and inelastic response spectra of the original ground motions and those from the multi-pulse decomposition method were generated for the ground motion ensembles. The distribution of pulse characteristics among the fault ruptures was presented for the Kahramanmaras earthquakes. © 2024, International Association for Earthquake Engineering. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Seismic Performance of Precast Post-Tensioned Segmental Bridge Piers with Shape Memory Alloy (SMA) Bars
    (Earthquake Engineering Research Institute, 2022) Kocakaplan Sezgin, Sedef; Ahmadi, Ehsan; Mehdi Kashani, Mohammad Mehdi
    In recent years, accelerated bridge construction (ABC) has led to substantial application of precast posttensioned segmental (PPS) bridge piers in bridge construction. However, PPS piers are not to be used in high-seismicity regions due to their low-energy dissipating capacity. To address this deficiency, this paper examines a segmental bridge pier with unbonded post-tensioned superelastic Shape Memory Alloy (SMA) bars through a Finite Element (FE) framework. The seismic performance of the PPS piers with SMA bars is investigated using far-field ground motions and incremental dynamic analysis (IDA). IDA curves of PPS piers are obtained for top drift and normalized base shear, and results are compared with the ones without SMA bars. It is seen that the PPS piers with SMA bars developed higher normalized base shear responses, which is mainly due to their higher stiffness compared to the ones without SMA. However, the PPS piers with SMA bars reduced the drift responses of the piers. © 2022 12th National Conference on Earthquake Engineering, NCEE 2022 All rights reserved.