Cyclic behavior of high-strength fiber-reinforced concrete columns under high axial loading level
Journal
ACI Structural Journal
Journal Volume
118
Journal Issue
6
Pages
103-116
Date Issued
2021
Author(s)
Abstract
Analytical and experimental studies of the lateral cyclic behavior of high-strength steel fiber-reinforced concrete (SFRC) columns under a high axial loading level are presented. The confinement efficiency was quantified based on the toughness ratio (TR) instead of column nominal axial strength. One hundred and ten column test results were collected to obtain the relationship between the minimum TR value and confinement parameters. Lateral cyclic tests on three high-strength SFRC columns under high axial compression loading were conducted to verify the confinement efficiency calculated using the TR equation. The use of steel fibers in high-strength reinforced concrete (RC) columns improved their confinement efficiency, strength, and ductility, particularly for columns that failed to comply with confinement required by ACI 318-14. The hysteretic loops obtained from experimental results were compared with those obtained from numerical modeling. The use of TR for calculating the equivalent confinement of SFRC columns confined by transverse reinforcement is acceptable. Copyright ? 2021, American Concrete Institute. All rights reserved.
Subjects
Confinement efficiency
High axial loading level
High-strength concrete (HSC)
Numerical model
Steel fiber-reinforced concrete (SFRC)
Toughness ratio (TR)
Axial loads
Fiber reinforced materials
High performance concrete
High strength steel
Numerical models
Reinforced concrete
Steel fibers
Axial loading
High strength concretes
High-strength concrete
Loading level
Reinforced concrete column
Steel fiber reinforced concretes
Steel fiber-reinforced concrete
Toughness ratio
Efficiency
Type
journal article