Premium
Seismic evaluation of the shear behavior in reinforced concrete bridge columns including effect of vertical accelerations
Author(s) -
Lee Hyerin,
Mosalam Khalid M.
Publication year - 2014
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.2346
Subject(s) - structural engineering , shear (geology) , earthquake shaking table , brittleness , geotechnical engineering , ultimate tensile strength , materials science , engineering , geology , composite material
SUMMARY The effect of vertical excitation on shear capacity of reinforced concrete columns is important. Field evidences, analytical studies and static or hybrid simulations suggested that excessive tension or tensile strain of the column may lead to shear strength degradation, and therefore vertical excitation can be one of the causes of shear failure. This paper describes an experimental study consisting of shaking table tests on reduced‐scale bridge columns. Results of the tests indicate that tension in the columns has the potential to degrade the shear capacity, which is mainly due to the degradation of the concrete contribution to this capacity. The presented computational results and code evaluations also support this shear strength degradation. The presented dynamic tests contribute to better understanding of the effect of vertical excitation on the shear failure, which is one of the most critical brittle failure mechanisms. Copyright © 2013 John Wiley & Sons, Ltd.