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http://dx.doi.org/10.12989/scs.2022.45.2.231

Friction-based beam-to-column connection for low-damage RC frames with hybrid trussed beams  

Colajanni, Piero (Department of Engineering, University of Palermo Edificio 8)
Pagnotta, Salvatore (Department of Engineering, University of Palermo Edificio 8)
Publication Information
Steel and Composite Structures / v.45, no.2, 2022 , pp. 231-248 More about this Journal
Abstract
Hybrid Steel-Trussed Concrete Beam (HSTCB) is structural typology suitable for light industrialization. HSTCBs usually cover long span with small depths, which lead to significant amount of longitudinal rebars. The latter make beam-column joints more prone to damage due to earthquake-induced cyclic actions. This phenomenon can be avoided using friction-based BCCs. Friction devices at Beam-to-Column Connections (BCCs) have become promising solutions to reduce the damage experienced by structural members during severe earthquakes. Few solutions have been developed for cast-in-place Reinforced Concrete (RC) and steel-concrete composite Moment Resisting Frames (MRFs), because of the difficulty of designing cost-effective damage-proof connections. This paper proposes a friction-based BCC for RC MRFs made with HSTCBs. Firstly, the proposed connection is described, and its innovative characteristics are emphasized. Secondly, the design method of the connection is outlined. A detailed 3D FE model representative of a beam-column joint fitted with the proposed connection is developed. Several monotonic and cyclic analyses are performed, investigating different design moment values. Lastly, the numerical results are discussed, which demonstrate the efficiency of the proposed solution in preventing damage to RC members, and in ensuring satisfactory dissipative capacity.
Keywords
friction connection; hybrid steel-trussed concrete beam; low-damage design; PerfoBond Connectors; RC structures;
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