الفهرس | Only 14 pages are availabe for public view |
Abstract Reinforced Concrete is the most commonly used construction material in many countries including ”Egypt”. Reinforced Concrete is used in the construction of many types of structures and components, including slabs, walls, beams, frames and columns on which the study in this thesis is focused. Reinforced Concrete elements are designed to satisfy safety, serviceability, functionality and economy which is in fact the most important point guiding the design and the choice of the suitable and most economic statical system of the whole building since that all other design factors can be easily satisfied during the design procedure just by satisfying different safety provisions (conditions) mentioned in different International Building Codes. Reinforced Concrete Columns, the main interest of this thesis, are the most important members besides foundations in the whole building. They are recognized as the structural vertical compression members which resist all vertical loads as well as part of the lateral loads acting on the building then transmit those loads to the foundation then to the soil. Further, one of the main functions of the columns in any building is their contribution in the overall stiffness of the structure of that building. According to the different International Building Codes, columns are classified according to two main points of view either geometrically (Related to their geometric properties) or structurally (Related to their structural properties such as Braced or Unbraced Columns). And since that this classification is mentioned in the different International Building Codes in different manners, it was decided to compare these different definitions to that of Egyptian Code of Practice which results sometimes in huge columns cross sections when compared to those mentioned according to other building codes. from this huge gap between the cross sections obtained by Egyptian Code of Practice and those by the other building codes due to its definition as braced or unbraced, it was decided to study the lateral stability of the skeletal reinforced concrete buildings in order to clarify the term “Braced & Unbraced Buildings”, trying to reach a new logic, realistic definition of the term Braced & Unbraced Buildings to reduce the economic gap in differentiating between both types of buildings in Egyptian Code of Practice compared with other International Building Codes. The study of this point in this thesis was concerned also with studying the factors that the Egyptian Code of Practice doesn’t take into consideration in differentiating between braced and unbraced buildings in addition to a comparison between Egyptian Code of Practice and different International Building Codes. |