An experimental study of new friction-slip connection for moment-frames with continuous beams. (November 2022)

• Record Type: Journal Article
• Authors: Seifan, Fereshteh; MirGhaderi, Seyed Rasoul; Ghassemieh, Mehdi
• Is Part Of: Journal of constructional steel research. Volume 198(2022)
• Publication Date: 2022-11
• Subjects: Continuous beams -- Friction–slip connection -- Experimental studies -- Bolted connection; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2022.107571
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: This paper presents an experimental, and a brief numerical study of a new configuration for friction–slip connections in moment frames with continuous beams. A specimen with a bolted connection was tested and subjected to a cyclic displacement protocol with three different bolt pretension loads. The results demonstrated that the connection worked as a rigid connection, and had an acceptable friction–slip behavior, and no structural damage was observed in the specimen after each test. Besides, increasing the bolt pretension loads leads to more energy dissipation based on the friction performance of the connection. The friction between the washers and the plate with slotted holes increases the strength of the specimen and causes deviations in the hysteretic response from the expected conventional frictional hysteresis response; while the analytical results show that by considering friction, only between the connection plates (the current theoretical approach), there would be no increase in load levels. Highlights: Experimental study on a new friction- slip connection in moment frames with continuous beams for 3 bolt loads were done. Energy dissipation, ductility, rigidity, slip occurrence and its amount in the connection were studied. The connection showed high energy dissipation, and categorized as a rigid connection. The slip activated in the connection as a fuse, so no structural damage was observed. The connection satisfies all requirements as a moment connection in the special moment frames standardized by the AISC.