000011467 001__ 11467
000011467 005__ 20141205155913.0
000011467 04107 $$aeng
000011467 046__ $$k2008-10-12
000011467 100__ $$aRong, Mianshui
000011467 24500 $$aThe Effect Analysis of Topography on the Spectrum Property of Ground Motion

000011467 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011467 260__ $$b
000011467 506__ $$arestricted
000011467 520__ $$2eng$$aThis paper presents results of numerical analyses for the seismic response of uniform visco-elastic site under different vertically propagating seismic waves including SH waves、SV waves and P waves. The aim of this paper is to explore the effects of site geometry, dynamic properties of soil or rock, as well as predominant excitation frequency on seismic ground motion. A step-like slope model and a mesa model are established and an explicit finite difference method is performed to evaluate the significance of topography effects. Two-dimensional finite-element analyses are conducted using artificial bell-shape impulse wavelets and recorded bedrock motions as base excitation. Moreover, effects of slope inclination、the incident direction and characteristic size of step-like slope on the spectrum property of the incoming waves are all discussed in detail. The conclusions show that the presence of topographic factors and the direction of the incident waves not only significantly affect the peak ground acceleration of sites, but also affect the spectrum property of the incoming waves, and the effect of direction of the incident waves is especially remarkable. The study also finds that it is reasonable to analysis spectrum properties with the input of impulse wavelets in the finite element simulation of wave motion. Furthermore, the spectrum ratio defined in this paper can be more effectively used to extract the pure effect of topographic irregularities compared with transfer function which is also widely adopted.

000011467 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011467 653__ $$avisco-elastic site explicit finite difference method wave motion topography effect finite element simulation of

000011467 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011467 720__ $$aRong, Mianshui$$iLi, Xiaojun$$iYou, Hongbin
000011467 8560_ $$ffischerc@itam.cas.cz
000011467 8564_ $$s753652$$uhttps://invenio.itam.cas.cz/record/11467/files/02-0120.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0120.
000011467 962__ $$r9324
000011467 980__ $$aPAPER