Abstract
Due to the advent of high speed digital computers, most nonlinear problems in structural dynamics can be solved numerically. However, it has been found that approximate analytical techniques based on linearization are still quite useful providing qualitative insights into the nature of system response. The aim of this study is to assess the applicability of various linearization techniques in comparison with conventional inelastic earthquake resistant design methods. The study is based on a single degree-of-freedom, bilinear, nondegrading hysteric structure, although these techniques are applicable to multidegree-of-freedom systems. The equivalent linearization predictions are based on the elastic responsse spectra as defined by Eurocode 8 for a stiff soil and 5% damping. These results are compared, in terms of peak internal member force, to those obtained through direct time-domain integration using a series of synthetic, Eurocode 8 spectrum compatible, acceleration time-histories.
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