Sheathing-fastener connection strength based design method for sheathed CFS point-symmetric wall frame studs

Selvaraj, Sivaganesh and Madhavan, Mahendrakumar and Lau, Hieng Ho (2021) Sheathing-fastener connection strength based design method for sheathed CFS point-symmetric wall frame studs. Structures, 33. pp. 1473-1494. ISSN 2352-0124

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Abstract

Cold-formed steel (CFS) in construction delivers cost effectiveness and design flexibility. The instability failures of CFS Structural members significantly influences the failures of sheathing boards attached as an external cover. Therefore, present study experimentally examines the structural behavior of sheathing fastener connection in cold-formed steel wall frame. As a first attempt, strength and stiffness of the sheathing fastener connection is determined against the failure modes of point symmetric CFS wall frame studs. A new test setup has been developed to investigate the individual sheathing fastener failure modes. Parameters investigated include sheathing board types (varying thickness) and different dimensions of point-symmetric CFS studs. A total of forty-one individual fastener connection tests were carried out. The experimental investigation revealed that the fastener connection strength varies depending on the geometric dimensions of CFS stud and material composition of sheathing board. The result indicated that the bracing effect provided by plain gypsum board (fiber less) is insignificant and should not be considered for design. For sheathing boards with fiber composition, a generic parameter [ratio to design moment (Mx or My) to CFS stud depth (h)] is introduced to consider the structural bracing effect in CFS wall panel design. The limitations to consider the bracing effect of sheathing in the design of CFS wall frame studs are suggested for minor axis buckling and major axis buckling. © 2021 Institution of Structural Engineers

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IITH Creators:

IITH Creators	ORCiD
Madhavan, Mahendrakumar	UNSPECIFIED

Item Type:

Article

Additional Information:

The investigation reported in this paper was funded by the Science Engineering and Research Board (SERB) Research Grant (No. SB/S3/CEE/046/2014) from the Department of Science and Technology (DST), Government of India. The first author would like to acknowledge the financial assistance received from this project. The authors would like to gratefully acknowledge Pennar Engineered Building Systems Ltd. Hyderabad for their help in fabricating the test specimens required for experimental investigation.

Uncontrolled Keywords:

Cold-formed Steel; Sheathing fastener connection-strength; Torsional buckling; Wall panel design

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

26 Sep 2022 04:28

Last Modified:

26 Sep 2022 04:28