000020328 001__ 20328
000020328 005__ 20170118182409.0
000020328 04107 $$aeng
000020328 046__ $$k2017-01-09
000020328 100__ $$aPoursha, Mehdi
000020328 24500 $$aA Single-Run Multi-Mode Pushover Analysis for Seismic Evaluation of Tall Buildings

000020328 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020328 260__ $$b
000020328 506__ $$arestricted
000020328 520__ $$2eng$$aPushover analysis has become an accepted tool for the seismic evaluation of structures in recent years. However, one of the shortcomings of this nonlinear static analysis is its inability to estimate the seismic demands of tall buildings. In this paper, a new procedure, called the single-run multi-mode pushover (SMP) analysis, is proposed to account for the effect of higher modes in estimating the seismic demands of tall buildings. The main simplification of this procedure is that the effect of higher modes is concentrated into a single invariant lateral force distribution computed by algebraically adding the modal story forces whereby a single-run multi-mode pushover analysis is implemented. An important advantage of the proposed procedure is that the spectral pseudo-acceleration of ground motions (or design spectrum) as a weighting parameter as well as the effective modal mass ratio is incorporated into the modal story forces. Then, the effect of the frequency content of ground motions is considered in the modal lateral forces. Another advantage of the SMP procedure is that the reversal of sign in the story forces of higher modes is taken into account. In this procedure, the seismic demands are finally obtained by enveloping the results of single-run conventional and single-run multi-mode pushover analyses. To assess the accuracy of the proposed procedure, two special steel moment-resisting frames are considered. The seismic demands resulting from the SMP procedure are compared to those from the nonlinear response history analysis (NL-RHA), as well as to those predicted from the modal pushover analysis (MPA) and the consecutive modal pushover (CMP) procedures. The results demonstrate that the SMP procedure can accurately estimate the seismic demands of tall buildings.

000020328 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020328 653__ $$asingle-run multi-mode pushover, higher modes effect, enhanced lateral force distribution, tall buildings

000020328 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020328 720__ $$aPoursha, Mehdi$$iAmini, Mohamad Amin
000020328 8560_ $$ffischerc@itam.cas.cz
000020328 8564_ $$s414266$$uhttps://invenio.itam.cas.cz/record/20328/files/992.pdf$$yOriginal version of the author's contribution as presented on USB, paper 992.
000020328 962__ $$r16048
000020328 980__ $$aPAPER