000004492 001__ 4492
000004492 005__ 20141118192700.0
000004492 0177_ $$2doi$$a10.3850/978-981-07-2219-7_P144

000004492 0247_ $$210.3850/978-981-07-2219-7_P144
$$adoi
000004492 04107 $$aeng
000004492 046__ $$k2012-05-23
000004492 100__ $$aKojima, Sayo
000004492 24500 $$aProbabilistic Hazard Model of Inelastic Oscillator based on Equivalent Linearization Technique

000004492 24630 $$n5.$$pProceedings of the 5th Asian-Pacific Symposium on Structural Reliability and its Applications
000004492 260__ $$bResearch Publishing, No:83 Genting Lane, #08-01, Genting Building, 349568 SINGAPORE
000004492 506__ $$arestricted
000004492 520__ $$2eng$$aPredictors of seismic structural demands that are less time consuming than nonlinear dynamic analysis (NDA) are useful for structural performance assessment and design. Several techniques for realizing such predictors have been proposed using the results of a nonlinear static pushover analysis. These techniques often use the maximum response of an inelastic oscillator that is "equivalent" to the original frame. In reliability-based seismic design, it is necessary to express the maximum response of the inelastic oscillator probabilistically. Such information could be obtained via NDA, which requires hundreds of samples. In practice, the use of simpler methods such as an equivalent linearization technique<sup>1</sup> (EqLT) using an elastic response spectrum seems more reasonable. Using Capacity spectrum (CS) method<sup>2</sup>, the inelastic displacement can be estimated graphically as the intersection of capacity spectrum and demand spectrum (DS), and DS's are being developed on the basis of probabilistic approaches such as a uniform hazard spectrum (UHS) and a conditional mean spectrum (CMS).
 We investigated the accuracy and applicability of the use of either a UHS or a CMS along with the CS method to estimate the exceedance probability (EProb) of the maximum displacement of an inelastic oscillator in 50 years, S<sup>I</sup><sub>D50</sub> . The results can be summarized as follows:
 • EProb’s of S<sup>I</sup><sub>D50</sub> can be estimated fairly accurately by a CS method that uses a UHS when the natural period is longer than or equal to 1.0 s. The accuracy increases with increase in the second stiffness ratio and with decrease in the yield base shear coefficient.
 • The CS method that uses CMS could provide fairly optimistic estimates when EProb is 20% or less in 50 years. This could be due to the ignorance of many other possible events of e.g.10% in 50 years.
 • The accuracy of CS method with UHS is investigated in standard normal stochastic process, and the slopes and locations of CS with which the CS method provides an accurate estimate are identified.

000004492 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004492 653__ $$aPerformance-based design, Inelastic oscillator, Equivalent linearization technique, Uniform hazard spectrum, Conditional mean spectrum, Standard normal stochastic process.

000004492 7112_ $$a5th Asian-Pacific Symposium on Structural Reliability and its Applications$$cSingapore (SG)$$d2012-05-23 / 2012-05-25$$gAPSSRA2012
000004492 720__ $$aKojima, Sayo$$iMori, Yasuhiro
000004492 8560_ $$ffischerc@itam.cas.cz
000004492 8564_ $$s562424$$uhttps://invenio.itam.cas.cz/record/4492/files/P144.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004492 962__ $$r4180
000004492 980__ $$aPAPER