000018441 001__ 18441
000018441 005__ 20170118182222.0
000018441 04107 $$aeng
000018441 046__ $$k2017-01-09
000018441 100__ $$aNajam, Fawad
000018441 24500 $$aA Modified Response Spectrum Analysis Procedure To Determine Nonlinear Seismic Demands of High-Rise Buildings With Shear Walls

000018441 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018441 260__ $$b
000018441 506__ $$arestricted
000018441 520__ $$2eng$$aThe standard Response Spectrum Analysis (RSA) procedure prescribed in various codes and design guidelines is commonly used by practicing engineers to determine seismic demands for structural design purpose. In this procedure the elastic force demands of all significant vibration modes are first combined and then reduced by a response modification factor (R) to get the inelastic design demands. Recent studies, however, have shown that this standard RSA procedure significantly underestimates the true inelastic demands of high-rise buildings as higher vibration modes tend to remain elastic (or undergo very little nonlinearity), and therefore it may not be appropriate to reduce their demand contribution by the same factor. In this study, a modified RSA procedure based on equivalent linearization concept is presented. The underlying assumptions are that nonlinear seismic demands can be approximately obtained by summing up individual modal responses, and that the responses of each individual vibration mode can be approximately represented by those of an equivalent linear SDF system. Using three high-rise buildings with reinforced concrete shear walls (20-, 33- and 44-story high), the accuracy of this procedure and the standard RSA procedure are examined. In this examination, the inelastic demands computed by the Nonlinear Response History Analysis (NLRHA) procedure are used as benchmark. The modified RSA procedure is found to provide a reasonable degree of accuracy for all case study buildings under different input ground motions.

000018441 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018441 653__ $$aResponse Spectrum Analysis; Response Modification Factor; Nonlinear Model; RC Shear Wall; High-rise Buildings

000018441 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018441 720__ $$aNajam, Fawad$$iWarnitchai, Pennung
000018441 8560_ $$ffischerc@itam.cas.cz
000018441 8564_ $$s613882$$uhttps://invenio.itam.cas.cz/record/18441/files/1468.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1468.
000018441 962__ $$r16048
000018441 980__ $$aPAPER