Study on In-Plane and Out-of-Plane Stiffness of Cold-Formed Steel Composite Floor with Opening
Publication: Journal of Structural Engineering
Volume 150, Issue 3
Abstract
In this study, experimental investigations were conducted to study the hysteresis and flexural performances of cold-formed steel (CFS) composite floors. The failure modes of the hysteresis specimens were damage of the screws connecting the composite slab and end joists, as well as bond-slip failure between the slab material and CFS form-deck. The failure modes of the flexural specimens involved shear deformation and buckling of the joists, as well as bond-slip failure between the slab material and CFS form-deck. Second, finite-element (FE) models were constructed and validated against the test data. Subsequently, numerical analysis models for floors with openings were developed. Also, parametric studies were performed by considering the influences of opening size, strengthening, and eccentricity on stiffness for floors with openings. The results revealed that actions to enhance stiffness for floors with openings involve minimizing the opening size, setting the opening strengthening, and keeping the opening centered. Finally, theoretical methods to determine the in-plane and out-of-plane stiffness for the floors with openings were proposed, and the calculations matched well with the numerical results.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors wish to acknowledge the support of the National Natural Science Foundation of China (No. 51908047), the Natural Science Foundation of Shaanxi Province, China (No. 2022JM-227, 2022JQ-570), and Fundamental Research Funds for the Central Universities of China, CHD (No. 300102281205). Any opinions, findings, and conclusion or recommendations expressed in this paper are those of the writers and do not necessarily reflect the views of the sponsors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 3 • March 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: May 13, 2023
Accepted: Oct 17, 2023
Published online: Dec 23, 2023
Published in print: Mar 1, 2024
Discussion open until: May 23, 2024
ASCE Technical Topics:
- Analysis (by type)
- Cold-formed steel
- Composite materials
- Engineering fundamentals
- Engineering materials (by type)
- Failure analysis
- Failure modes
- Finite element method
- Floors
- Forensic engineering
- Material failures
- Materials characterization
- Materials engineering
- Metals (material)
- Methodology (by type)
- Numerical methods
- Steel
- Stiffening
- Structural behavior
- Structural engineering
- Structural systems
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