ENERGY BASED EVALUATION OF REINFORCED CONCRETE STRUCTURE AFFORDABLE BY FAR FIELD EARTHQUAKE


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Çelebi O., Bayrak B., Kılıç M., Aydın A. C.

6th International Conference on Computational Mathematics and Engineering Sciences / 20-22 May. 2022, Ordu – Turkey, Ordu, Türkiye, 20 Mayıs - 22 Haziran 2022, cilt.1, sa.1, ss.21-43

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Ordu
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.21-43
  • Atatürk Üniversitesi Adresli: Evet

Özet

In today's Standards, many methods are used for the structural evaluation of reinforced concrete buildings, such as non-linear analysis in the time integration, unimodal and multimodal static pushover analysis, and summing of modes. In the literature, the evaluation of energy-based structures is a subject that has not been studied much. In addition, the criteria for this method are not specified in any Standard. The energy-based evaluation method is compared with the capacity curve of the structure (base shear force-peak displacement curve) by calculating the input energies to be generated by the earthquake in the building. If the earthquake energy demands in the building remain below this capacity curve, the damage levels are not foreseen for the building, but if it stays above the capacity curves, it is based on the principle that damage to the structure is likely to occur. The input energy of the earthquake can be dissipated with the plastic deformations that the structures can make without collapse, the kinetic energy depending on the mass of the structure in the elastic region, and the energy dissipated by viscous damping. In this study, the energy capacity of a 4-storey reinforced concrete structure, which does not have the risk of soil amplification, at 39.9026 Latitude and 41.2498 Longitude coordinates, was calculated by obtaining the base shear force - peak displacement curve using the pushover analysis method. Then, the minimum and maximum earthquakes in 2020 and 2021 affecting the structure were given as input, and the demand energies created by the earthquakes in the structure were calculated. By showing how much of these earthquake energies the building can dissipate, damage ındex were determined and the damage levels of the building were determined. In the calculation of the demand energies of the earthquake, the analysis method in the time domain defined in the Turkish Building Earthquake Code 2018 was applied. At the end of the study, the amount of energy required to be stored in the structure is shown in order to distribute the energy of an earthquake without damaging the structure.