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Response Modification Factor of Steel Plate Shear Wall in Steel Structures

Merati, Saeed | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 44797 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Mofid, Massoud
  7. Abstract:
  8. Steel shear wall systems have been introduced as a lateral load resisting system since 1970s. Based on the designer’s choice, this system can be used with or without stiffeners. Employing stiffeners prevents the elastic buckling of steel plates which can enhance the system to absorb more energy. The design code for using stiffeners has not developed yet in Iran since this kind of systems is not common practice. In this study, the Response Modification Factor (R), as an important factor in the design procedures of structures, is investigated for 1,3,5,7 and 10-story regular and irregular building structures which have un-stiffened steel shear walls with 3, 4.5 and 6 millimeters thickness with 3.8 and 5.7 meters spans. To this end, the force-displacement curve is calculated using non-linear static analysis by incremental lateral loading. The simplified force-displacement curve and Uang's method are used for the calculation of over strength factor and ductility factor. The results show that the over strength factors are between 1.3 to 2 for all cases. These values have an almost positive correlation with the increase in the number of stories and the thickness of steel shear wall. Also, ductility factors have a direct relation with the thickness of steel plate shear wall and ranges from 3 to 5. In addition, minimum and maximum values of R factor are obtained between 6 and 12, respectively; also the 90 percent of calculated Rs for regular cases are greater than 7 and the 87.5 percent of calculated Rs for irregular cases are greater than 6.5
  9. Keywords:
  10. Steel Plate Shear Wall (SPSW) ; Strength Reduction Factor ; Uang،s Method ; Finite Element Method ; Additive Nonlinear Static Analysis

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