Lateral Cyclic Behavior of SRC-RC Hybrid Columns Bending around Strong and Weak Axes: Effects of Embedment Lengths
Publication: Journal of Performance of Constructed Facilities
Volume 38, Issue 1
Abstract
Hybrid columns with partial structural steel-reinforced concrete (SRC) and reinforced concrete (RC) sections in the transfer stories of buildings are prone to premature shear failure due to sudden changes in load bearing and stiffness properties. An experimental program was undertaken in this study to investigate the influence of the length of embedment of structural steel in hybrid SRC-RC columns bending around strong and weak axes. Five large-scale specimens with varying lengths of embedded structural steel were tested under gradually increasing lateral cyclic displacements and constant axial load. The main parameters studied were the failure mechanism, hysteretic response, energy dissipation potential, and lateral stiffness of test specimens. Test results showed that all SRC-RC specimens, irrespective of the direction of lateral loading, had higher lateral strengths than the RC columns. However, specimens with the lower embedment of structural steel performed poorly due to shear-dominated failure. Test results also highlighted the detailing requirements for lateral ties in the zone where structural steel was not present to promote the flexural mode of failure. Numerical analysis based on finite element modeling was carried out to predict the strength and failure mechanism of SRC-RC columns. Based on the findings of this study, recommendations are suggested for the design and detailing of these columns for practical applications.
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Data Availability Statement
Some or all data, models, or codes generated or used during the study are available from the corresponding author by request.
Acknowledgments
The authors are thankful for the resources provided by the Indian Institute of Technology, Delhi. The help and support from staff members of the Heavy Structures Laboratory, IIT Delhi is gratefully acknowledged.
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© 2023 American Society of Civil Engineers.
History
Received: May 25, 2023
Accepted: Sep 7, 2023
Published online: Oct 28, 2023
Published in print: Feb 1, 2024
Discussion open until: Mar 28, 2024
ASCE Technical Topics:
- Analysis (by type)
- Concrete
- Continuum mechanics
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Failure analysis
- Failure modes
- Finite element method
- Forensic engineering
- Hybrid methods
- Lateral loads
- Materials engineering
- Methodology (by type)
- Numerical methods
- Reinforced concrete
- Shear failures
- Solid mechanics
- Steel structures
- Structural dynamics
- Structural engineering
- Structural failures
- Structures (by type)
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