Title:
Reduction of Lateral Reinforcement in Seismic
Beam-Column Connection via Application of Steel Fibers
Author(s):
Ziad Bayasi and Michael Gebman
Publication:
Structural Journal
Volume:
99
Issue:
6
Appears on pages(s):
772-780
Keywords:
fiber-reinforced concrete; joint; lateral reinforcement; loading
DOI:
10.14359/12342
Date:
11/1/2002
Abstract:
A literature review and an experimental study regarding the effect of using steel fibers in seismic beam-column connections are reported. The addition of steel fibers to seismic joints without changing joint design is noted to improve resistance to earthquake loading. Taking advantage of the confining effect of steel fibers, lateral joint reinforcement can be reduced when using steel fibers in joints. Such reduction is manifested as an increase of hoop spacing within the joint region. Based on the available test data, for steel fiber reinforcement index [Vf (l/d)] ranging between 1.0 and 1.6, lateral reinforcement reduction ranged between 0.3 and 1.1% equivalent to a 50% to more than 200% increase of hoop spacing. More importantly, the effective application of steel fibers results in significantly improved joint behavior under seismic loading. Reducing the number of hoops in seismic joints is advantageous for reducing steel congestion in joints, reducing joint construction cost, and enhancing joint performance.