Influence of Geo-Grid Confinement on Axial Behavior of Circular Short Columns
Publication: Practice Periodical on Structural Design and Construction
Volume 29, Issue 3
Abstract
Geogrids, first developed in the late 20th century, revolutionized soil reinforcement using polymer materials in grid-like structures to enhance soil stability, reduce erosion, and strengthen infrastructure, marking a pivotal advancement in geotechnical engineering. However, geogrids typically find limited application in structural engineering, especially reinforced concrete (RC) columns. The present research explores the feasibility of geogrids in concrete columns, thus optimizing construction practices by exploring innovative reinforcement methods beyond conventional steel, aiming to bolster durability and performance in diverse structural scenarios. The traditional method of using steel stirrups to confine circular columns was substituted with a new approach; i.e., geogrids were introduced partially as confining material alongside steel stirrups. Furthermore, the research examines the performance of concrete columns confined partially with geogrid, both with and without the inclusion of steel fibers, in comparison to traditional columns reinforced with steel. Columns, 16 in number, with different steel stirrup spacing, concrete types, and geogrid configurations, were cast and put under axial load. Load-deflection curves were obtained, and parameters including ultimate load, maximum axial displacement, ductility, secant stiffness, and energy dissipation were assessed and compared. The findings indicated that incorporating geogrids with greater tensile strength alongside steel fibers could uphold a peak load value 10.16% higher than the control column, improved stiffness, and enhanced energy dissipation, indicating a promising approach for reinforcing columns in conjunction with steel fibers.
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Data Availability Statement
All data, models, or code used during the study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors greatly acknowledge Tata steel private limited for providing steel bars and Kasturi metal composite private limited for providing steel fibers for research work.
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 29 • Issue 3 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 30, 2023
Accepted: Jan 21, 2024
Published online: Apr 8, 2024
Published in print: Aug 1, 2024
Discussion open until: Sep 8, 2024
ASCE Technical Topics:
- Axial loads
- Columns
- Concrete
- Concrete columns
- Engineering materials (by type)
- Engineering mechanics
- Fibers
- Geogrids
- Geomaterials
- Geomechanics
- Geotechnical engineering
- Materials engineering
- Reinforced concrete
- Soil dynamics
- Soil mechanics
- Soil stabilization
- Static loads
- Statics (mechanics)
- Steel columns
- Steel fibers
- Structural engineering
- Structural members
- Structural systems
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