Ozkilic, Yasin O.2024-02-232024-02-2320201229-93671598-6233https://doi.org/10.12989/scs.2020.35.3.353https://hdl.handle.net/20.500.12452/15154This paper describes a new type of replaceable fuse for moment resisting frames. Column-tree connections with beam splice connections are frequently preferred in the moment resisting frames since they eliminate field welding and provide good quality. In the column-tree connections, a part of the beam is welded to the column in the shop and the rest of the beam is bolted with the splice connection in the field. In this study, a replaceable reduced beam section (R-RBS) connection is proposed in order to eliminate welding process and facilitate assembly at the site. In the proposed R-RBS connection, one end is connected by a beam splice connection to the beam and the other end is connected by a bolted end-plate connection to the column. More importantly is that the proposed R-RBS connection allows the replacement of the damaged R-RBS easily right after an earthquake. Pursuant to this goal, experimental and numerical studies have been undertaken to investigate the performance of the R-RBS connection. An experimental study on the RBS connection was used to substantiate the numerical model using ABAQUS, a commercially available finite element software. Additionally, five different finite element models were developed to conduct a parametric study. The results of the analysis were compared in terms of the moment and energy absorption capacities, PEEQ, rupture and tri-axiality indexes. The design process as well as the optimum dimensions of the RRBS connections are presented. It was also demonstrated that the proposed R-RBS connection satisfies AISC criteria based on the nonlinear finite element analysis results.eninfo:eu-repo/semantics/closedAccessReduced Beam SectionAbaqusRupture IndexPeeqColumn-Tree ConnectionsCyclic LoadingBeam SpliceTri-Axiality IndexReplaceable FuseArticle3533533702-s2.0-85090005483Q1WOS:000531021200003Q110.12989/scs.2020.35.3.353