Sub-assemblage low damage connection incorporating blind-bolts and RBRFs subjected to cyclic loading. (December 2018)

• Record Type: Journal Article
• Authors: Oktavianus, Yusak; Goldsworthy, Helen; Gad, Emad; Fernando, Saman; Pokharel, Tilak; Chang, Hongfei
• Is Part Of: Journal of constructional steel research. Volume 151(2018)
• Page Start: 280
• Page End: 296
• Publication Date: 2018-12
• Subjects: Low-damage connection -- Subassemblage beam-column joint -- Cyclic test -- Replaceable buckling restrained fuses (RBRFs) -- Blind bolt -- composite structures; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2018.09.026
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: The Christchurch earthquake has given a renewed impetus to the development and use of low damage connections within moment-resisting frames in New Zealand. When using a low-damage technology, the building is designed to be easily repairable after a severe earthquake and is hence expected to be more resilient and cost-effective. This paper reports on a sub-assemblage test that investigates the behaviour of a newly proposed low damage connection between a steel beam and composite column. The connection incorporates blind-bolts, curved T-stubs and replaceable buckling restrained fuses (RBRFs). The RBRF is the only element which is allowed to yield when the earthquake level is higher than the design-based earthquake, so the establishment of a suitable strength hierarchy is vital to the success of the design. Two loading protocols have been applied using the same sub-assemblage but with a new RBRF at the start of each test; i.e. the RBRF was replaced after each test. The contributions of the connection, beam, and column to the total rotation have been summarised. The results show that a semi-rigid connection can be achieved by using this type of connection. Furthermore, an analytical approach has been proposed to predict the behaviour of this type of connection. Highlights: A new low damage connection has been proposed. The strength hierarchy of the connection has been developed. Replaceable buckling restrained fuses (RBRFs) are utilised as the only yielding element. The contribution of each component of the connections has been derived. A simplified analytical approach has been developed to predict the behaviour of the connection.