Proposal of energy spectra for earthquake resistant design based on turkish registers
- Autores: Ahmet Utku Yazgan
- Directores de la Tesis: Francisco López Almansa (dir. tes.), Luis Gonzaga Pujades Beneit (dir. tes.), Amadeo Benavent Climent (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2012
- Idioma: inglés
- Tribunal Calificador de la Tesis: Haluk Sucuoglu (presid.), Antoni Roca Adrover (secret.), Fabrizio Mollaioli (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
This work proposes design energy spectra in terms of an equivalent velocity, intended for regions with design peak acceleration 0.3 g or higher. These spectra have been derived through linear and nonlinear dynamic analyses on a number of Turkish selected strong ground motion records. In the long and mid period ranges the analyses are linear, taking profit of the rather insensitivity of the spectra to the structural parameters other than the fundamental period; conversely, in the short period range, the spectra are more sensitive to the structural parameters and, hence, nonlinear analyses are required. The selected records are classified in eight groups with respect to the soil type (stiff soil and soft soil), the severity of the earthquake in terms of surface magnitude Ms (Ms ¿ 5.5 and Ms > 5.5) and the relevance of the near-source effects (impulsive and vibratory). For each of these groups, median and characteristic spectra are proposed; such levels are intended to correspond to 50% and to 95% percentiles, respectively. These spectra have an initial linear growing branch in the short period range, a horizontal branch in the mid period range and a descending branch in the long period range. Empirical criteria for estimating the hysteretic energy from the input energy are suggested. The proposed design spectra are compared with those obtained from other studies.
