000011764 001__ 11764
000011764 005__ 20141205155944.0
000011764 04107 $$aeng
000011764 046__ $$k2008-10-12
000011764 100__ $$aSun, Rui
000011764 24500 $$aEffect of Liquefaction on Displacement Spectra

000011764 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011764 260__ $$b
000011764 506__ $$arestricted
000011764 520__ $$2eng$$aAt present, the seismic design of structures is mainly based on the response spectra. The seismic responses for the deep foundations, the underground structures and structures with the long or high scale are dominated by soil deformation in general and in these cases, the displacement spectra is more significant than the acceleration spectra. Liquefaction is one of the important reasons for earthquake damages. The liquefied soils filter the high frequency parts of incident waves and while amplify the low frequency parts. The later effects are quite significant to the seismic design of above structures and little study, however, is conducted for the problem. The effect of liquefied soil layers on displacement spectra is discussed and the revised displacement spectra due to liquefaction are presented in the paper. The effects of liquefaction on the peaks of surface displacements, different frequency range of spectra and the regularity of the surface ground motion are investigated by seismic record analysis, numerical simulation and shaking table tests. The decreasing and increasing threshold of liquefaction are identified and the revised form of displacement spectra is constructed. The results here indicate: (1) For the uniform incidence of equal-amplitude, the liquefied soil layer amplifies the displacement amplitudes by 5 times to 25 times; (2) For the random seismic incidence, the liquefied soil layer enlarges the displacement amplitudes by a few times compared with the non-liquefied soil layer; (3) The amplification of the displacement spectra due to liquefaction begins at 1s and the most notable range is 2s-5s; (3) The amplification of the displacement spectra due to liquefaction is 0.1m-0.7m and increases with the increasing of intensity of the inputting waves.

000011764 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011764 653__ $$aLiquefaction, Soil Layer, Displacement Spectra, Revised Displacement Spectra

000011764 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011764 720__ $$aSun, Rui$$iChen, Longwei$$iYuan, Xiaoming$$iQiu, Yi
000011764 8560_ $$ffischerc@itam.cas.cz
000011764 8564_ $$s214250$$uhttps://invenio.itam.cas.cz/record/11764/files/03-03-0044.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 03-03-0044.
000011764 962__ $$r9324
000011764 980__ $$aPAPER