Steel and Composite Structures

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Seismic-resistant slim-floor beam-to-column joints: experimental and numerical investigations

  • Don, Rafaela (Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara) ;
  • Ciutina, Adrian (Department of Overland Communication Ways, Foundation & Cadastral Survey, Politehnica University of Timisoara) ;
  • Vulcu, Cristian (Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara) ;
  • Stratan, Aurel (Department of Steel Structures and Structural Mechanics, Politehnica University of Timisoara)
  • Received : 2020.07.22
  • Accepted : 2020.10.18
  • Published : 2020.11.10
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Abstract

The slim-floor solution provides an efficient alternative to the classic slab-over-beam configuration due to architectural and structural benefits. Two deficiencies can be identified in the current state-of-art: (i) the technique is limited to nonseismic applications and (ii) the lack of information on moment-resisting slim-floor beam-to-column joints. In the seismic design of framed structures, continuous beam-to-column joints are required for plastic hinges to form at the ends of the beams. The present paper proposes a slim-floor technical solution capable of expanding the current application of slim-floor joints to seismic-resistant composite construction. The proposed solution relies on a moment-resisting connection with a thick end-plate and large-diameter bolts, which are used to fulfill the required strength and stiffness characteristics of continuous connections, while maintaining a reduced height of the configuration. Considering the proposed novel solution and the variety of parameters that could affect the behavior of the joint, experimental and numerical validations are compulsory. Consequently, the current paper presents the experimental and numerical investigation of two slim-floor beam-to-column joint assemblies. The results are discussed in terms of moment-rotation curves, available rotational capacity and failure modes. The study focuses on developing reliable slim-floor beam joints that are applicable to steel building frame structures located in seismic regions.

Keywords

Acknowledgement

The third author was supported by the Alexander von Humboldt Foundation through a Research Fellowship for Experienced Researchers. This support is gratefully acknowledged.

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