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Developing of MIDA Method in Irregular Structures in Plan with Concentrated Plasticity Model

Yari, Mohammad Hossein | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54292 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Mofid, Massoud
  7. Abstract:
  8. In this research, modal incremental dynamic analysis (MIDA) has been investigated on three-dimensional structures with irregular plans. The MIDA method is an incremental static analysis that considers higher modes of the structure. In fact, it is a combination of modal pushover (MPO) and incremental dynamic analysis (IDA) methods that incorporate the advantages of both and is much faster than the IDA method. Compared to constant analyses, incremental analysis is more extensive in terms of results and response to earthquakes. Due to the uncertainties in the nature of future earthquakes, engineers use the IDA method to achieve a broader view of the structure's response under potential earthquakes. The problem with IDA analysis is its complexity and high computational cost, which has prevented this method from being widely used for typical structures. MIDA analysis is an efficient, cost-effective, and high-precision method that can be replaced with the IDA method in many studies. To extend the MIDA method, previous studies have investigated two-dimensional or three-dimensional models with regular plans in which a hypothetical distance between the center of rigidity and the center of mass of the stories was considered. In the present study, the MIDA method is performed on three-dimensional structures with irregular plans that naturally have a distance between the center of mass and rigidity due to geometric irregularities. Furthermore, a concentrated plasticity model with a deterioration behavior has been applied to these structures. What will be shown as the result of this study is the accuracy of the MIDA method and the effect of concentrated plasticity modeling in this procedure
  9. Keywords:
  10. Modul Incremental Dynamic Analysis ; Incremental Dynamic Analysis ; Three Dimensional Bodies ; Biaxial Eccentricity ; Plan-Asymmetric Structures ; Concentrated Plasticity Model

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