Interfacial shear resistance of angle shear connectors welded to concrete filled U-shaped CFS beam

Hyoung Seok Oh, Hyeongyeop Shin, Youngkyu Ju, Thomas H.K. Kang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


For multi-story structural systems, Korean steel industry has fostered development of a steel-concrete composite beam. Configuration of the composite beam is characterized by steel angle shear connectors welded to a U-shaped cold formed-steel beam. Effects of shear connector orientation and spacing were studied to evaluate current application of the angle shear connector design equation in AC495. For the study, interfacial shear resistance behavior was investigated by conducting 24 push-out tests and attuned using unreinforced push-out specimens. Interfacial shear to horizontal slip response was reported along with corresponding failure patterns. Pure shear connector strength was also evaluated by excluding concrete shear contribution, which was estimated in relation to steel beam-slab interface separation or interfacial crack width.

Original languageEnglish
Pages (from-to)311-325
Number of pages15
JournalSteel and Composite Structures
Issue number3
Publication statusPublished - 2022 May 10

Bibliographical note

Funding Information:
The research described in this paper was financially supported by the POSCO and the National Research Foundation of Korea (NRF) (No. 2021R1A5A1032433). The testing was done at the POSCO laboratory, and the assistance of Dr. Jin-Won Kim of POSCO and Mr. Hee-Hoon Kim of DRB is greatly appreciated. During the process of the research, the second and fourth authors primarily contributed to the publications of AC495 and ICC-ES (ESR-4134, U-shaped steel-contribute composite beam (BESTOBEAM system)). The views expressed are those of the authors, and do not necessarily represent those of the sponsor.

Publisher Copyright:
Copyright © 2022 Techno-Press, Ltd.


  • aggregate interlocking resistance
  • angle
  • channel
  • cold formed-steel
  • composite beam
  • concrete
  • interfacial shear strength
  • push-out test
  • shear connector
  • U-shaped section

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Metals and Alloys


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