Cyclic Behavior of Reinforced Concrete Columns with L-Shaped Ties
Publication: Journal of Structural Engineering
Volume 150, Issue 3
Abstract
In reinforced concrete columns, both constructability and structural safety should be considered in selecting the anchorage details of transverse reinforcement. For the simple installation of peripheral hoops, in this study, L-shaped ties were proposed to replace the conventional closed hoops with 135° hook anchorages. The L-ties can be easily installed from the side of columns by temporarily moving a longitudinal bar. Cyclic lateral loading tests were performed on five reinforced concrete columns to verify the effect of the L-ties on the shear resistance and buckling resistance of longitudinal bars after concrete cover spalling. The main test parameters included the types of transverse reinforcement, aspect ratio of columns, and straight extension of hooks. The test results demonstrated that the strength, deformation capacity, and energy dissipation of the columns using L-ties were comparable to those of columns using the conventional closed hoops because 135° hooks at both ends in the L-ties were anchored in the core concrete. The straight extension of the 135° hook anchorages with provided a sufficient anchorage performance despite following concrete cover spalling. Furthermore, nonlinear behaviors of the columns were discussed by comparing the nonlinear modeling parameters specfied in current standards to evaluate postyield deformation capacities.
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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
This research was supported by BK Rebar Processing Co. and the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF-2020R1F1A1049971). The authors express gratitude for the support.
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© 2023 American Society of Civil Engineers.
History
Received: Mar 8, 2023
Accepted: Oct 23, 2023
Published online: Dec 21, 2023
Published in print: Mar 1, 2024
Discussion open until: May 21, 2024
ASCE Technical Topics:
- Anchorages
- Bars (structure)
- Columns
- Concrete
- Concrete columns
- Continuum mechanics
- Deformation (mechanics)
- Design (by type)
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Fluid mechanics
- Hydraulic engineering
- Hydraulic structures
- Hydrologic engineering
- Materials engineering
- Ports and harbors
- Reinforced concrete
- Shear resistance
- Solid mechanics
- Structural behavior
- Structural design
- Structural engineering
- Structural mechanics
- Structural members
- Structural safety
- Structural systems
- Viscosity
- Water and water resources
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