Abstract
Eccentrically braced steel frames are structures used to resist lateral loads as they combine the ductility that is characteristic of moment frames and the stiffness associated with braced frames. Damper devices can be used as the main source of energy dissipation and have become more popular lately for the lateral control of structures. Control devices generally reduce damage by increasing structural safety, serviceability and preventing the building from collapse during vibration. This study focused on improving the performance of the structures with a proposed damping system, which has more advantages than eccentrically braced frames (EBFs). It can accommodate many architectural features and make construction and complementarity in the structures easier. The purpose of this study is to evaluate the performance of the structure with the proposed damping system and its construction in the building.
Highlights
Eccentrically braced frames (EBFs) are a lateral loadresistance system that can be considered a hybrid between conventional moment-resisting frames (MRFs) and concentrically braced frames (CBFs)
This paper describes an alternative system for EBFs in reducing the response of structures under lateral forces
In EBFs, forces are transferred to the brace members through bending and shear forces developed in the ductile steel link
Summary
Braced frames (EBFs) are a lateral loadresistance system that can be considered a hybrid between conventional moment-resisting frames (MRFs) and concentrically braced frames (CBFs). EBFs have become an attractive lateral resistance structural system since they provide high levels of both elastic stiffness and ductility. In EBF systems, yielding is concentrated only at link segments and all other members of the frame (beams, columns and braces) are expected to behave elastically. Links can be considered as structural fuses which will dissipate the lateral input energy through stable and controlled plastic deformations. It is evident that the ability to dissipate energy depends strictly on the plastic deformations essentially located in links, designed to plasticize before beams, braces and columns, designed to use the forces generated by yielded and hardened links in order to remain in the elastic field. The eccentric-braced frame, as a system, has features for resisting lateral forces:. Yielding of the link beam is a ductile phenomenon that absorbs energy and reduces the dynamic structural response by increasing the damping and the natural period of the building
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