Title:
Application of Special Reinforcement Arrangements for RC Members under Torsion – Design Examples
Author(s):
Constantin E. Chalioris, and Chris G. Karayannis
Publication:
Symposium Paper
Volume:
344
Issue:
Appears on pages(s):
92-110
Keywords:
torsion; reinforced concrete; spiral reinforcement; Fiber Reinforced Polymers; steel fibers; stirrups
DOI:
10.14359/51728292
Date:
10/1/2020
Abstract:
Recently the use of special reinforcement arrangements has been extended in reinforced concrete
members under torsion. These arrangements include (a) continuous rectangular spiral reinforcement, (b) epoxy
bonded Carbon Fiber Reinforced Polymer (C-FRP) sheets as external transverse reinforcement and (c) short steel
fibers as mass reinforcement. In this study an extended experimental program of 14 beams tested under torsion is
presented. All specimens have the same geometrical characteristics but different transverse reinforcement
arrangements. Six beams are used as pilot specimens; three of them have no transverse reinforcement and three have
conventional steel stirrups. Further, two specimens have continuous steel spirals; four specimens have steel fibers as
mass reinforcement and two specimens have externally bonded C-FRP sheets. The torsional behavior of these
specimens is presented and compared to the behavior of the pilot specimens. Discussion and explanatory design
examples about the application of these reinforcements are also included.