Mohammed Jalil Jihad Karakosh - Assistant Lecturer, Department of Building & Construction Technical Engineering, Al-NajafEngineering Technical College, University of Al-Furat Al-Awsat Technical ,Najaf, Iraq
Reza Moradi - PhD in structure Engineering, Department of Civil Engineering, Faculty of Engineering, RaziUniversity, Kermanshah, Iran

Double Skin Concrete- The inner skin, exterior steel skin, and concrete-filled annulus comprise Filled Steel Tubular (DSCFT) members. the steel beam with a DSCFT section is a group of composite beams that take advantage of the cohesion performance of steel in the perimeter and concrete in the central part for load-bearing. The main idea behind the emergence of these sections is the combination of concrete and steel to use the advantages of each of these materials. The result of this combination leads to the creation of a structure with superior characteristics compared to conventional concrete and steel structures. According to the study of the past, the need for further recognition of the behavior and performance of DSCFT steel beams is felt. Therefore, in this study, the main purpose of examining the behavior and performance of DSCFT steel beams is. For this purpose, new articles on steel DSCFT will be studied. Thereafter, the bending behavior of the composite steel beams (DSCFT) will be investigated.

Double Skin Concrete-Filled steel Tubular, DSCFT, composite, steel beam, Flexural Performance