Effect of Load Path on Damage to Concrete Bridge Piers.
Effect of Load Path on Damage to Concrete Bridge Piers.
(661 K)
Taylor, A. W.; El-Bahy, A.; Stone, W. C.; Kunnath, S. K.
NIST SP 904; August 1996.
U.S./Japan Natural Resources Development Program (UJNR).
Wind and Seismic Effects. Joint Meeting of the
U.S./Japan Cooperative Program in Natural Resources
Panel on Wind and Seismic Effects, 28th. May 14-17,
1996, Gaithersburg, MD, Raufaste, N. J., Jr., Editor(s),
149-158 pp, 1996.
Available from:
National Technical Information Service
Order number: PB97-104376
Keywords:
bridges (structures); bridge columns; building
technology; damage modeling; earthquake engineering;
laboratory testing; random loading; reinforced concretes
Abstract:
In earthquake engineering studies of reinforced concrete
(RC) bridge columns, a controlled, cyclic lateral load
pattern with gradually increasing amplitude has
traditionally been applied to laboratory test specimens.
However, in actual earthquakes bridge columns are
exposed to random cyclic lateral loading patterns, which
are much different from typical laboratory loading
patterns. Current American Association of State Highway
and Transportation Officials (AASHTO) and California
Department of Transportation (Caltrans) design
provisions are based almost entirely on tests in which
traditional, controlled laboratory loading patterns have
been applied. The differences in the effects of these
types of loading have never been explored
systematically. In this study both types of loading
(controlled, cyclic lateral loads, and random earthquake
type loads) were applied to a series of twelve nominally
identical, one-fourth scale circular, cantilever
columns, and the differences in observed damage were
studied. In this paper the experimental results are
briefly summarized, and preliminary findings are
discussed.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899