000018690 001__ 18690
000018690 005__ 20170118182236.0
000018690 04107 $$aeng
000018690 046__ $$k2017-01-09
000018690 100__ $$aJi, Shuyan
000018690 24500 $$aA Spectral Intensity Index of Ground Motions for Input Selection With Consideration of Higher Modes Effect for Super High-Rise Buildings

000018690 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018690 260__ $$b
000018690 506__ $$arestricted
000018690 520__ $$2eng$$aThe selection of ground motion is a critical problem which can influence the structural response in seismic design and analysis. Nevertheless, the proposed intensity indexes are unable to consider the influence of higher modes (HM) on seismic response of super tall building structures reasonably. The effect of HM is measured by sufficient number of modes that modal participating mass ratio (MPMR) more than 90% generally. In this study, some spectral intensity indexes are summarized. The MPMR of the first three order vibration mode are counted. Meanwhile, the base shear error of 5 different super high-rise buildings are analyzed when structures with different MPMR. And then, a ground motion spectral intensity index（S90）which MPMR more than 90% for considering the HM is put forward. The correlation between it and super high-rise structural seismic response is studied, and the incremental dynamic analysis (IDA) method is adopted to evaluate its discreteness. The results show that the statistics value of MPMR of the first three orders generally amounted to less than 80%. Only considering the first three order vibration modes of the ground motion intensity indexes to reflect the structural response features is insufficient. There are more than 5% error for the structural base shear due to keeping down vibration modes, and it cannot meet the requirement of the structural base shear errors control according to the MPMR requirements of 90%.The correlation between the response of super high-rise building and S90 is good and the discreteness is also in a reasonable range. It can therefore be taken as a significant reference index when selecting the ground motions input for the analysis of super high rise buildings.

000018690 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018690 653__ $$asuper high-rise building structures; HM; MPMR; spectral intensity index of ground motions; correlation

000018690 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018690 720__ $$aJi, Shuyan$$iZhou, Guangxin$$iQin, Yang$$iTan, Qian$$iLi, Yingmin
000018690 8560_ $$ffischerc@itam.cas.cz
000018690 8564_ $$s1104627$$uhttps://invenio.itam.cas.cz/record/18690/files/2014.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2014.
000018690 962__ $$r16048
000018690 980__ $$aPAPER