الفهرس 
Common Types and Parametric Study of SteelOnly 14 pages are availabe for public view
 |  | from | 259 |  |  |
| | | from | 259 | | |
Abstract
The steel framework is one of the most commonly used structural systems in modern construction. The analysis of such structural systems is governed by the assumptions adopted in the modeling of their structural elements, espe¬cially those concerning the behavior of beam-to-column connections. Conventional methods of steel frame analysis use two idealized connection models; the rigid-joint model, and the pinned-joint model. Because the actual behavior of frames connections always lies in between these two extremes, much attention has been focused in recent years toward a more accurate modeling of such connections. Recent researches on structural connections have resulted in considerable progress and understanding of the subject that prompts changes in design provisions. Experimental data since 1936, for seven shapes of steel connections, which were stored by W. F. Chen, and Kishi in a steel connection data bank (SCDB) program, are used in the analysis of frames. The behavior of steel frames with partially restrained connections are studied and compared to the rigid frame behavior. The actual moment-rotation relationships, for the connections along the load history, are incorporated in the analysis stage. The results show that, taking the actual connection behavior in the analysis process affects the frame response. The geometric and material nonlinearities are considered in the second order analysis and they are found to affect the frame response. A three dimensional finite element model for the extended end plate steel connection, which is the most popular steel connection, is also presented. The moment-rotation relationship for extended end plate steel connection is obtained and compared to that stored in the SCDB, and it shows very good agreement. Finally, the results of the F.E.M. analysis of the extended end plate connection shows that, the moment-rotation relationship for this connection type can be obtained with good accuracy which will be used for economical design purposes.