الفهرس Only 14 pages are availabe for public view
 |  | from | 140 |  |  |
| | | from | 140 | | |
Abstract
The main objective of this thesis is to study and compare the seismic response of reinforced concrete, steel-concrete composite, and steel framed structures under several levels of earthquakes.
To achieve this objective, series of sixteen buildings; reinforced concrete, composite, and steel multistory of regular buildings frames, are designed representing low¬, mid-, and high-rise structures. The series of the Reinforced Concrete buildings are designed in accordance with code requirements prescribed in the Egyptian Code of Practice for Reinforced Concrete Design and Construction (ECRC) of 2003. The steel¬concrete composite buildings are designed in accordance with code requirements of Great Britain (CPllO). The steel buildings are designed in accordance the Egyptian Code of Practice of Steel Structures and Bridges (ECSSB) of 2003. The Egyptian Code for Calculation of Loads and Forces (ECL) of 2002 is used. All designed structures are assumed to exist in the highest seismic zone of Egypt.
The research concluded that the code design procedure does not ensure global mechanism in which the system can use its maximum strength. Based on that, in this study the lower sections of columns are considered as an upper bound of the stiffness of the buildings according to the design code. By trials and errors, the stiffness was decreased in
the above floors than the lower ones. Where the reduction factor it found between ± 2 - 5% in each group of columns .
. The results show that the steel system, in general, inherits more ductility than the other systems at the severest level of earthquake forces. However, the composite system is , die most reliable system in resisting severs earthquake forces compared to the steel and the RC ones