The Assessment of Joint's Rigidity Effect on the Nonlinear Dynamic Behaviour of Steel Frames with Semi-Rigid Connections

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Sanati, Kiana | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42995 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Mofid, Massoud
Abstract:
In this thesis project the effect of joint rigidity on the behavior of steel braced frames has been investigated. In order to carry out this study on the efficiency of semi-rigid connections, a series of 3-bay braced frames ranging from 6- to 20-story with extended end-plate and flush end-plate connections have been selected and designed. This study has been extended by evaluating the role of the mentioned connections on seismic performance of selected semi-rigid frames under seven famous earthquake records. Having taken a particular performance level, in this case, “life safety” the target displacement and also the lateral load pattern for each frame have been calculated. Then using a nonlinear static analysis, the behavior of each frame has been investigated. Finally, the results of both semi-rigid joints have been compared with those of similar rigid frames. As expected, the results of the nonlinear time history analysis have shown that both extended end-plate and flush end-plate connections have reduced the lateral displacements and the base shear of the structure
Keywords:
Nonlinear Static Analysis ; Nonlinear Dynamic Analysis ; Braced Frames ; Pushover Analysis ; Performance Levels ; Semirigid Connection ; Extended End-plate Connection ; Flush End-plate Connection

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