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Development of Fragility Curves for Confined Masonry Buildings

Yekrangnia, Mohammad | 2017

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 49940 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Ghannad, Mohammad Ali; Bakhshi, Ali
  7. Abstract:
  8. The present study deals with the development of development of fragility curves for confined masonry buildings with the emphasis on masonry school buildings by means of numerical simulation. In doing so and based on the results of several previously-performed tests in Iran, simple analytical models for confined masonry walls capable of predicting various failure modes and also simulating different behavioral characteristics of these walls in the form of cyclic force-displacement curves were presented. In order to endure the ability of the proposed analytical models in simulation of seismic response of existing confined masonry buildings, a static-cyclic in-situ test on a real typical representative confined masonry school building was performed. The results in the form of failure modes and their severity in different parts of the building and cyclic force-displacement curves were evaluated. Comparison of these results with those of the corresponding unconfined specimen indicated considerable improvement in the seismic behavior of the studied building thanks to the inclusion of reinforced concrete ties. Moreover, it was observed that the proposed analytical models can acceptably predict the seismic response of the studied building. In the following and based on the proposed damage index according to the wall’s critical displacements derived from the proposed analytical models, fragility curves were developed for a typical representative single-story confined masonry building by performing IDA and taking into account the effects of near-field and far-field records, diaphragm’s rigidity, and confining ties. Finally, these curves were used in conjunction with the data necessary to build consequence functions and existing masonry school buildings to perform scenario-based seismic risk analyses on masonry school building in Tehran
  9. Keywords:
  10. Numerical Modeling ; Damage Index ; Fragility Curve ; Confined Masonary Building ; In-Situ Tests

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