Assessment of Seismic Behavior Factor of Irregular Midrise Steel Structure

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Baghi, Alireza | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40840 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Mofid, Masoud
Abstract:
The Overstrength, Ductility and the Response Modification Factor (R) for 70 steel X-braced , Inverted-V-Braced and Offcenter Bracing System frames were evaluated by performing pushover analysis of model structure with various stories (3,6,9,12&15 story) and span length (4,6&8 meter). Some result were compared with those from nonlinear dynamic analysis. According to the analysis result the R factors obtained from nonlinear dynamic analysis are 15% more than obtained from pushover analysis and R factors computed from pushover analysis were generally smaller than the values given in the design codes. R factors in Irregular structure in height are about 90% of R values in regular structure in height. Also the R factors did not change when the span length decrease or increase
Keywords:
Strength Reduction Factor ; X-Bracing ; Irregular Midrise Steel Structures ; Inverted-V-Bracing ; Eye Brow Bracing

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