Cyclic Behavior of Beams with Double-Perimeter and Continuous-Stirrup Hoops
Journal
ACI Structural Journal
Journal Volume
121
Journal Issue
3
Start Page
187
End Page
200
ISSN
0889-3241
0889-3241
Date Issued
2024-05-01
Author(s)
DOI
10.14359/51740485
Abstract
Two types of hoop layouts, double-perimeter hoops (DPH) and continuous-stirrup hoops (CSH), were examined in this research for beams of special moment frames. Compared to conventional hoops (CH), the DPH and CSH have the advantage of better constructability. Full-scale beam specimens-specimen CH as a control specimen and specimens DPH and CSH as test specimens-were tested using lateral cyclic loading to examine their seismic performance. Test results showed that although specimen DPH violated the Code requirement for the number and spacing of laterally supported longitudinal bars, the specimen still exhibited seismic performance sufficient for beams of special moment frames. Specimen CSH showed better seismic performance than the control specimen (CH). The better performance of CSH was mainly attributed to the better concrete confinement and reinforcing bar buckling restraint ability of the intermediate hoops of the CSH than the intermediate stirrups of the CH.
Subjects
closed stirrups
deformation capacity
energy dissipation
hoops
plastic hinge region
reinforced concrete beams
reinforcement buckling
special moment frames
SDGs
Publisher
American Concrete Institute
Type
journal article