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Developing the MIDA Method for Mid-Rise Structures with Non-symmetrical Plan

Zanjanchi Nikoo, Moein | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49389 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Mofid, Masood
  7. Abstract:
  8. Performance based design becomes an effective method for estimating seismic demands of buildings. Incremental dynamic analysis (IDA) based on a nonlinear response time history analysis (NL-RHA) is considered to be the most accurate method in seismic demand calculations. However, modal incremental dynamic analysis (MIDA), based on the equivalent single degree-of-freedom (SDF) oscillator, is also often used in studying structural engineering performances. The MIDA procedure for estimating seismic demands is extended to unsymmetric-plan buildings. In the MIDA procedure, the seismic demand due to individual terms in the modal expansion of the effective earthquake forces is determined by non-linear static analysis using the inertia force distribution for each mode, which for unsymmetric buildings includes two lateral forces and torque at each floor level. In this regard, several 4 ,7 and 12 story structures are specified as the example models and are dynamically analysed. Next, three different scaled earthquakes, El Centro, Parkfield and Northridge, are applied to each example problem. Then the MIDA procedure is evaluated by comparing the results of IDA method as an exact solution. Comparison of the results demonstrate good accuracy in building seismic demands evaluation
  9. Keywords:
  10. Modul Incremental Dynamic Analysis ; Incremental Dynamic Analysis ; Unsymmetric-Plan Buildings ; Eccentricity ; Three Dimensional Bodies

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