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Nonlinear Analysis of 3D Irregular concrete Structures by Endurance Time Method

Khaki, Ali | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43589 (09)
  4. University: Sharif University Of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Esmaeil Pourestekanchi, Homayun
  7. Abstract:
  8. The structure performances during past earthquakes indicate the importance of predicting behaviors of irregular structures under earthquakes. If the irregularity exceeds an expected limit, a seismic analysis should be carried out by a dynamic analysis method. The Endurance Time (ET) is a time-history method, base on dynamic analysis for seismic analyzing and designing the structures, in which structures are subjected to intensifying accelerogram functions and their Endurance Time is measured. One of the most applicable methods for RCF analysis is the Concentrated Hinge Model which is used in this research too. The needed parameters for modeling plasticity in concentrated hinge are achieved by a formulation using design parameters of beam and column element. 3, 5, 7 and 12 stories buildings of 3 and 4 bays are studied in two groups of regulars and irregulars. The performances of these structures are investigated under bi-directional nonlinear analysis and their capabilities to keep the acceptance criteria limits are assessed by Endurance Time method. The results show that the irregularity can’t cause damage in structures generally; however, it has done in some irregular structures. Finally, sensitive analysis of bond slip effect is carried out for RC structure behaviors and it is found out that for structures which meet building code shear design requirements, this effect does not affect.

  9. Keywords:
  10. Endurance Time Method ; Concrete Structures ; Nonlinear Modeling ; Three Dimensional Analysis ; Irregular Structures

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