University of Tabriz Journal of Civil and Environmental Engineering 2008-7918 55 121 2026 01 21 Enhancing the Cyclic Behavior of a Mechanical Beam-To-Column Joint in Steel Moment-Resisting Frames with CFT Columns Using a Novel Spring-Guide Restoring System Enhancing the Cyclic Behavior of a Mechanical Beam-To-Column Joint in Steel Moment-Resisting Frames with CFT Columns Using a Novel Spring-Guide Restoring System 79 95 21076 10.22034/ceej.2026.70268.2472 FA Hamid Ghaderi Faculty Department of Civil Engineering, Mar. C., Islamic Azad University, Maragheh, Iran Ahmad Maleki Faculty Department of Civil Engineering, Mar. C., Islamic Azad University, Maragheh, Iran Mohammad Ali Lotfollahi-Yaghin Faculty Civil Engineering, University of Tabriz, Tabriz, Iran Journal Article 2025 11 16 The concept of using Concrete-Filled Steel Tube (CFT) columns has been proposed to optimize the use of steel and concrete materials. The advantages of these elements have led to their widespread application in the construction industry. These types of columns are usually used in moment resisting frame systems with rigid connections, and play a significant role in lateral load resistance of the system. Despite providing sufficient strength for beams and columns, weakness in the connection area can disrupt the load path and could lead to overall collapse of the system. When the connection is well-designed, seismic fuses will concentrate at both ends of the beam (the main frame member). After a strong earthquake, the entire story beam needs repair or replacement, which incurs high costs. To address all these challenges, this study proposes using a mechanical joint equipped with a centering spring. The concept of using Concrete-Filled Steel Tube (CFT) columns has been proposed to optimize the use of steel and concrete materials. The advantages of these elements have led to their widespread application in the construction industry. These types of columns are usually used in moment resisting frame systems with rigid connections, and play a significant role in lateral load resistance of the system. Despite providing sufficient strength for beams and columns, weakness in the connection area can disrupt the load path and could lead to overall collapse of the system. When the connection is well-designed, seismic fuses will concentrate at both ends of the beam (the main frame member). After a strong earthquake, the entire story beam needs repair or replacement, which incurs high costs. To address all these challenges, this study proposes using a mechanical joint equipped with a centering spring. https://ceej.tabrizu.ac.ir/article_21076_c53867a90f771e0582daf912a96641f6.pdf