In practice, steel frames are analyzed and designed by assuming all beam to column
connections as either rigid or simple. In real life, there are no such idealizations as rigid or simple and
all connections would actually belong to a group of connections named as semi rigid connections.
Various difficulties exist in modeling an accurate non-linear behavior of a steel structure,
where one of these challenges is the modeling of semi-rigid behavior of connections. A detailed finite
element model would take into account the complex interaction between all surfaces due to contact,
friction and bolt pretension besides the material and geometrical nonlinearity effects. All these
nonlinearity effects could be simply lumped as a moment-rotation type model at the connection
region. Such a methodology is followed in this thesis and the main aim is to study the lumped
nonlinear behavior of steel semi-rigid connections on the overall structural responses of steel Special
Moment Frames.
In this thesis three, nine and fifteen story steel Special Moment Frames are analyzed and
designed as rigid frames first, and then the frames are reanalyzed considering non-linear effects due to
semi-rigid connections. Changes in the ductility and overstrength reduction factors obtained from
pushover curves are compared between the rigid and semi rigid modeling alternatives.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12615725/index.pdf |
| Date | 01 February 2013 |
| Creators | Metin, Tolga |
| Contributors | Saritas, Afsin |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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