000011789 001__ 11789
000011789 005__ 20141205155946.0
000011789 04107 $$aeng
000011789 046__ $$k2008-10-12
000011789 100__ $$aTaghavi, Amirata
000011789 24500 $$aStarting Estimates of Seismic Site Coefficients along 2D Semi-Elliptical Shaped Hills

000011789 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011789 260__ $$b
000011789 506__ $$arestricted
000011789 520__ $$2eng$$aIn the recent past, there have been numerous cases of recorded motion and observed earthquake damage pointing toward topographic amplification as an important effect. Very high recorded accelerations during earthquakes have been sometimes attributed to topographic effects of hills as one basic type of local surface irregularities. In this paper the results of a comprehensive parametric study for estimating the site coefficients in areas with 2D semi-elliptical shaped hills has been presented. Using adequate number of accelerograms as well as numerically calculated transfer functions of 2D semi-elliptical shaped hills, the extension capability of the Borcherdt’s method to 2D semi-elliptical shaped hills has been investigated. By frequency domain analysis and then inverse Fourier transform, the amplified accelerograms along the hills were obtained. The achieved results accentuated the efficiency of the Borcherdt’s method in 2D microzonation studies. Moreover, it has been shown that the site coefficients vary between 1.0 and 1.7, are comparable to the 1D site coefficients usually suggested by the seismic codes, differ from short to long periods and exceed the maximum value of 1.4 proposed by the AFPS (1990) code for seismic design of structures in topographic areas.

000011789 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011789 653__ $$asite effect, topography, semi-elliptical shaped hill, amplification, response spectra, site coefficient

000011789 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011789 720__ $$aTaghavi, Amirata$$iKamalian, Mohsen$$iBaziar, Mohammad H.$$iSohrabi-Bidar, Abdollah$$iJafari, Mohammad K.
000011789 8560_ $$ffischerc@itam.cas.cz
000011789 8564_ $$s2925244$$uhttps://invenio.itam.cas.cz/record/11789/files/04-02-0108.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-02-0108.
000011789 962__ $$r9324
000011789 980__ $$aPAPER