Short Wall-like Piers Of R/C
Monolithic Bridges Under Seismic Loading:
EC8 Provisions And Experimental Results
Author(s)
T. Salonikios
Abstract
In order to check and to calibrate Eurocode 8 (part 2), provisions for wall-like
piers, the results from the laboratory tests of eleven wall specimens are used. The
plastic hinge length that was developed during the experiments is measured and
is compared with the plastic hinge length that was calculated according to the
provisions of EC8. For these walls the rotation ductilities that result: a) from
experimental measurements, b) from the analysis of the cross sections by
R.C.COL.A. program, c) from the application of simplified equations are also
calculated. For these three groups of curvature ductilities, by the use of measured
and calculated plastic hinge lengths, the displacement ductilities are calculated.
For these displacement ductilities, the corresponding strength reduction factors
are calculated. For this purpose, a simplified methodology is used, by which the
inclination of the ascending branch, the strength degradation, the stiffness
degradation and the pinching of the force – displacement diagrams of the
specimens are taken into account. According to this methodology, a soil profile
with stiff or dense soil conditions is considered. For the calculation of the
behavior factors the models of two bridges are considered. These two bridges
have wall-like piers. This work aims to give an estimation of the fluctuations of
the behavior factor due to the variation of the displacement ductility factor (as
results by the consideration of different method of estimation). These behavior
factors are compared with the behavior factors that are suggested by EC8 (part 2)
for R/C bridges with piers of a low aspect ratio.
Keywords: wall-like bridge piers, experimental testing, curvature ductility,
displacement ductility, hysteretic behavior, behavior factor, Eurocode 8.
Keywords
wall-like bridge piers, experimental testing, curvature ductility,
displacement ductility, hysteretic behavior, behavior factor, Eurocode 8.
Related Book
Other papers in this volume
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