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Evaluation of Response Modification Factor for Cable Styaed Bridges

| 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48898 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Maleki, Shervin
  7. Abstract:
  8. Bridges are among the crucial elements of transportation networks and play an important role in facilitating emergency relief efforts following earthquakes. For this reasons, they should have an appropriate performance in earthquakes; Thus, presentation of true design of bridges was necessary. Elastic design of bridges due to the earthquake is uneconomic; hence, during an earthquake, the codes permitted to structures go to their inelastic behavior domain but inelastic analysis of structures are noncommercial and the capability of detail modeling of the inelastic behavior of the material is still impossible. Therefore, designers use response modification factor to consider the inelastic behavior of structures and with the assist of this factor, the earthquake induced force in the structure is reduced and structure is analyzed in elastic domain. Response modification factors are pointed in different codes but still now, the response modification factor of cable-stayed bridges are not presented in any codes. Then, this research attempts to evaluate the response modification factor of cable-stayed bridge Usually, the presented response modification factors in codes are determined on the basis of expert judgment and the accuracy of these factors is evaluated in incoming earthquakes. However, after 50 years of propagation of cable-stayed bridges construction in the USA, approximately, it can be stated, there aren’t any data about the behavior of these structures during an earthquake. Therefore, in this study, for quantification of response modification factor of these types of bridges, FEMA P695, which introduced in 2009, was used. This manual introduced a methodology for assessment of performance base response factor for buildings. This study was used this introduced method in the quantification of response factors for cable-stayed bridges
  9. Keywords:
  10. Response Modification Factor (R) ; Inelastic Analysis ; Performance Levels ; Federal Emergency Management Agency (FEMA)P695 Code ; Cables Stayed Bridges ; Structure Behavior Coefficient ; Bridges

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