الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Steel concrete composite structures are widely used in many structural applications such as beams, slabs, walls and columns. Composite structures provide not only great reduction for the element size and weight but also high structural efficiency. Because of, the little data and discrepancy between the R.C. and steel Egyptian codes of practice, an experimental and theoretical investigation were conducted to study the behavior of concrete filled steel box columns. The experimental program consists of six square filled steel box columns and two square R.C. columns (reference elements). The experimental variables are the load position (centric or eccentric) and the distribution of the mechanical shear connectors (nails). While, the theoretical program (using ANSYS program) consists of seven categories, each category consists of four composite columns. The theoretical variables are the geometry of concrete section (tIb) and eccentricity (eft). All results obtained from experimental and theoretical investigations are discussed and compared with the calculated values predicated from the Egyptian R.C. and steel codes of practices.