M. Ordaz et Le. Perezrocha, ESTIMATION OF STRENGTH-REDUCTION FACTORS FOR ELASTOPLASTIC SYSTEMS - A NEW APPROACH, Earthquake engineering & structural dynamics, 27(9), 1998, pp. 889-901
A new rule is presented to estimate strength-reduction factors in sing
le-degree-of-freedom elastoplastic oscillators, in which reduction fac
tors depend only on displacement elastic spectra, so they are not an e
xplicit function of structural period. It is found that the proposed r
ule yields good results when applied to accelerograms recorded in firm
and soft soils, and for damping ratios of 2, 5 and 10 per cent of the
critical. It is shown that the proposed reduction rule is more genera
l than others previously published, and at least as accurate. (C) 1998
John Wiley & Sons, Ltd.