In the current research project, an effort is made so as to investigate the capability of the innovative Modal Incremental Dynamic Analysis (MIDA) method considering 3D structural models, the effect of plan irregularities and near-field earthquake records. Therefore, to fulfil this goal, 10 near-field earthquake records in one principal direction of structures as well as 10 far-field earthquake records in two principal directions of structures are applied to 12 structures with 6, 12 and 18-storeys, and 10 %, 20 %, 30 % and 40 % plan irregularities. The study of these parameters reveals that in geometrically regular 3D structures, this innovative method meets all seismic demands parameters just as the IDA method does. Furthermore, it concludes that MIDA method is not capable of obtaining the exact IDA curves in low-rise and medium-rise structures located in near-field regions since it results in noticeable errors. Finally, it is essential to improve the MIDA approach for near-field earthquake records by replacing the drift criterion utilized in this method with a more accurate drift criterion.

• Dynamic response of structures located in near-field and far-field regions using IDA and MIDA
  • 1. Introduction
  • 2. Methods
    • 2.1. Review on MIDA method
    • 2.2. Modeling and the assumptions of the models
    • 2.3. Verification
    • 2.3.1. Verification with regard to calculated periods
    • 2.3.2. Mode shape verification
    • 2.4. Record selection
    • 2.4.2. Selecting far-field records
    • 2.5. Performing analysis and obtaining curves
  • 3. Results and Discussions
    • 3.1. Results
      • 3.1.1.1. Comparison of maximum roof displacement and drift versus PGA in “Morgan Hill” record for 6-story structures
    • 3.1.2. Comparison of maximum roof displacement and drift versus PGA in far- field records
      • 3.1.2.1. Comparison of maximum roof displacement and drift versus PGA for 6-story structures
      • 3.1.2.2. Comparison of maximum roof displacement and drift versus PGA 12-storey structures
      • 3.1.2.3. Comparison of maximum roof displacement and drift versus PGA 18-storey structures
    • 3.1.3. Comparison of the effect of height and modes on maximum roof displacements’ error as well as drifts’ errors in fixed irregularities
    • 3.2. Discussion
  • 4. Conclusion

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. — Периодичность: 8 раз в год. — Выходит с 2020 г. — Загл. с титул. экрана. — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — Текст: электронный

Magazine of Civil Engineering / Санкт-Петербургский политехнический университет Петра Великого. — Санкт-Петербург: СПбПУ, 2020-. № 2 (102), 2021. — 1 файл (15,3 Мб). — Свободный доступ из сети Интернет (чтение, печать, копирование). — Электрон. журнал. — <URL:http://elib.spbstu.ru/dl/2/j21-324.pdf>.