会议专题

INFLUENCE OF LOW-CUT FILTER FREQUENCY ON NONLINEAR OSCILLATOR DISPLACEMENTS COMPUTED FROM NON-DEGRADING TO DEGRADING HYSTERETIC MODELS

Low-cut filtering used for removing the long-period noise in accelerograms is investigated for its effects on the nonlinear peak oscillator displacements. We used a suite of analog and digital accelerograms from Turkish strong-motion database and low-cut filtered each record by a set of randomly generated filter cut-offs. We computed nonlinear displacement spectra to highlight the period-dependent influence of low-cut filtering on the nonlinear oscillator response. Differences in the nonlinear oscillator response are considered by using a wide range of hysteretic models that cover non-degrading to severely degrading structural behavior. Our analyses show that inelastic spectral displacements are more vulnerable to low-cut filtering than their elastic counterparts. This can be attributed to the intricate relation between the nonlinear structural parameters, record quality and ground-motion features that increase the level of complexity between the nonlinear oscillator response and low-cut filtering. Recording type (digital / analog recording), earthquake magnitude, site classification, inelasticity level, hysteretic model as well as the variations in peak ground motion are the prominent factors about the influence of low-cut filters on peak nonlinear oscillator displacements.

record processing nonlinear oscillator response non-degrading / degrading hysteretic behavior constant strength and ductility spectrum probability

(O).Kale S. Akkar M.A. Erberik

Graduate Student, Earthquake Engineering Research Center, Dept. of Civil Engineering, Middle East Te Professor, Earthquake Engineering Research Center, Dept. of Civil Engineering, Middle East Technical

国际会议

14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

北京

英文

2008-10-12(万方平台首次上网日期,不代表论文的发表时间)