Experimental Study on Finding Reliable Connectors for Infill-frame Connection in Infilled Steel Frame

Document Type : Research Article

Authors

1 PhD candidate, Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran; ORCID: 0000-0002-9730-1090

2 PhD, Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

3 PhD, Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology (IIEES)

4 PhD, Department of Structural Engineering, Road, Housing & Urban Development Research Center, Tehran, Iran

Abstract

During earthquakes, infill walls are imposed to in-plane (IP) and out-of-plane (OOP) seismic loads. After some in-plane seismic vibrations, the worst case for out-of-plane stability of the infill appears when there is the least integrity in the frame-to-wall connections. Using some kind of reliable connectors for frame-to-wall connection is an innovative method to improve their IP and OOP seismic behavior. Noting that the literature on infilled frames has not focused on this subject yet, the present research was carried out with the purpose of introducing a kind of reliable and efficient frame-to-wall connector and to study its effects on IP and OOP behavior of the infilled frames and the infills. Four half-scale single-story single-bay specimens, including one bare frame, an infill wall and two infilled steel frames having walls of autoclave-cured aerated concrete (AAC) blocks, were tested under IP and OOP cyclic displacement controlled loading. The specimens were tested to investigate their failure modes, strength, stiffness degradation, damage evolution in frame and infill, cracking patterns of infill, energy dissipation capacity and out-of-plane displacement of infills. The experimental results revealed that the V-type connectors showed good and reliable interaction as far as the safety issues were concerned. Therefore, such types of fasteners can be used as kinds of promising reliable frame-to-wall connectors for AAC infill panels.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 12
March 2022
Pages 5259-5280

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