Analytical investigation OF RBS. Connections in Highly Ductile Systems Interacting with HSS –BOX-CFT Columns for Increasing the dimensional Ratios of Column Sections an‎d Panel Zone Members

5/30/2026 12:00:00 AM

Concrete Filled Tube (CFT) columns are one of the types of composite columns that have attracted considerable attention due to their significant advantages, including elimination of formwork requirements, appropriate strength with lower volume an‎d weight compared to reinforced concrete columns, higher ductility an‎d energy absorption capacity, resistance against impact an‎d fire, economic efficiency for compression members, an‎d smaller deformations in comparison with steel members. Therefore, they are widely used in high-rise buildings, bridges, an‎d offshore structures. One of the important issues regarding CFT columns is the type of connections used in these columns as well as the application of shear connectors an‎d external stiffeners. The employed connections an‎d stiffeners should be designed in such a way that steel an‎d concrete can participate simultaneously in load carrying an‎d energy absorption. In this thesis, an attempt has been made to briefly review the history of composite sections an‎d their various types, along with their advantages, disadvantages, structural behaviors, factors affecting construction quality, an‎d the analytical assumptions that are among the most important factors influencing the design an‎d construction process of CFT sections. This review aims to provide a comprehensive understan‎ding of the influential parameters considered an‎d compared in analytical models. Furthermore, in the conducted analyses, the performance of the panel zone in concrete-filled steel tubular (CFT) columns, the conditions of concrete, an‎d the continuity plates in the connection panel zone have been investigated in order to achieve a better comparison of the effects of concrete an‎d continuity plates on the behavior of these connections in the performed analytical studies.

المان محدود , ستون بتن آرمه , مدل آسيب پلاستيك , مكانيسم هاي شكست

Finite elements , Concrete Column , Plastic Damage , Failure Mechanisms

Kamran Edraki

Dr.Shayanfar