Loading...
Anchorage Strength of Closely Spaced Hooked Bars
Ajaam, Ali Hussein Yasso, Samir Darwin, David O’Reilly, Matthew Sperry, Jayne
Ajaam, Ali Hussein
Yasso, Samir
Darwin, David
O’Reilly, Matthew
Sperry, Jayne
Citations
Altmetric:
Abstract
The effect of close spacing on the anchorage strength of standard hooks is investigated. Sixty-seven simulated beam-column joint specimens were tested, each containing three, four, or six No. 5, 8, or 11 (No. 16, 25, or 36) hooked bars arranged in one or two layers with center-to-center spacing ranging from two to six bar diameters. Anchorage strengths are compared with those of specimens containing two hooked bars with spacings of six to 12 bar diameters. The results demonstrate that the provisions in ACI 318-14 tend to overestimate the anchorage strength of hooked bars as concrete compressive strength and bar size increase and as spacing between bars decreases. Decreasing center-to-center spacing below six bar diameters results in lower anchorage strengths than for hooked bars with wider spacing. The anchorage strength of hooked bars can be represented by considering the minimum of the horizontal and vertical spacing between bars.
Description
Date
2018-07
Journal Title
Journal ISSN
Volume Title
Publisher
American Concrete Institute
Research Projects
Organizational Units
Journal Issue
Keywords
Anchorage, Beam-column joints, High-strength concrete, High-strength steel, Hooks, Reinforced concrete, Reinforcement, Spacing, Staggered hooks
Citation
Ajaam, A., Yasso, S., Darwin, D., O’Reilly, M., and Sperry, J., “Anchorage Strength of Closely-Spaced Hooked Bars,” ACI Structural Journal, Vol. 115, No. 4, July-Aug. 2018, pp. 1143-1152.