Coupled Site and Soil-Structure Interaction Effects with by Tom Schanz, Roumen Iankov

By Tom Schanz, Roumen Iankov

This quantity covers papers offered at NATO ARW 983188 “Coupled website and Soil-Structure interplay results with software to Seismic possibility Mitigation”, held in Borovets, Bulgaria, from thirtieth of August to third of September 2008. the most target of the workshop used to be to offer a state-of-the-art on site-soil-structure-interaction results, as manifested within the broader sector of South and South-Eastern Europe, that's surely the main seismically-prone area of the eu continent. A moment goal used to be to aim a definition of the seismic possibility posed to the equipped setting during this zone and to provide sleek tools for seismic probability mitigation. Papers integrated during this quantity are grouped into 4 chapters: (1) web site stipulations and their function in seismic danger analyses; (2) Soil-structure-interaction; (3) The function of web site results and of soil-structure-interaction in layout of buildings; and (4) basic and similar topics. the next topic fields are addressed: seismological elements (near-field results, seismic wave propagation, free-field motions); geotechnical engineering (slopes, foundations, lifelines, dams, protecting walls); structural engineering (buildings, bridges, box measurements, protecting systems).

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Extra resources for Coupled Site and Soil-Structure Interaction Effects with Application to Seismic Risk Mitigation (NATO Science for Peace and Security Series C: Environmental Security)

Example text

First, the site-characteristic peaks are not present in all recordings. , 1999; Trifunac and Ivanovi´c, 2003a,b), the site peaks occur again at most about 50% of time, but usually less often. Second, the spectral peaks shift to longer periods or completely disappear for motions with peak ground velocity larger than about 10 cm/s. Figure 4b shows a similar plot, but with the contributing events arranged in the chronological order following the main (Northridge) event. 3 s 10 min later, during events 9 and 20.

1978a) Preliminary empirical models for scaling pseudo relative velocity spectra, Report No. 78-04, Dept. , Univ. of Southern California, Los Angeles, CA. Trifunac, M. D. and Anderson, J. G. (1978b) Preliminary models for scaling relative velocity spectra, Report No. 78-05, Dept. , Univ. of Southern California, Los Angeles, CA. Trifunac, M. D. and Brady, A. G. (1976) On the correlation of seismic intensity scales with the peaks of recorded strong ground motion, Bull. Seism. Soc. Am. 66, 139–162.

Settlement from earthquake shaking also occurs in dry sands. One of the consequences is compaction, which is accompanied by an increase in 16 M. D. TRIFUNAC the effective shear modulus. The implication for analyses of strong ground motion is that, after settlement, the site-specific peaks in the spectra of recorded motions can shift toward shorter periods. Dynamic compaction of soil following strong shaking will thus result in a “stiffer” site for shaking by waves from the aftershocks. Aftershocks have a small source area, and consequently the pencils of wave arrivals at the site are narrow.

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