By Tom Schanz, Roumen Iankov
This quantity covers papers awarded at NATO ARW 983188 “Coupled website and Soil-Structure interplay results with program to Seismic danger Mitigation”, held in Borovets, Bulgaria, from thirtieth of August to third of September 2008. the most goal of the workshop was once to give a state-of-the-art on site-soil-structure-interaction results, as manifested within the broader region of South and South-Eastern Europe, that's absolutely the main seismically-prone quarter of the ecu continent. A moment target used to be to aim a definition of the seismic probability posed to the equipped setting during this region and to offer glossy equipment for seismic possibility mitigation. Papers integrated during this quantity are grouped into 4 chapters: (1) website stipulations and their position in seismic threat analyses; (2) Soil-structure-interaction; (3) The position of web site results and of soil-structure-interaction in layout of constructions; and (4) normal and similar topics. the subsequent topic fields are addressed: seismological elements (near-field results, seismic wave propagation, free-field motions); geotechnical engineering (slopes, foundations, lifelines, dams, conserving walls); structural engineering (buildings, bridges, box measurements, protecting systems).
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Additional 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)
We illustrate this by examples of ground failure that can follow liquefaction: lateral spreading, ground oscillations, flow failure, and loss of bearing strength. Lateral spreads involve displacements of surface blocks of sediment facilitated by liquefaction in a subsurface layer. This type of failure may occur on slopes up to 3◦ and is particularly destructive to pipelines, bridge piers, and other long and shallow structures situated in flood plain areas adjacent to rivers. Ground oscillations occur when the slopes are too small to result in lateral spreads following liquefaction at depth.
2000a) Long period microtremors, microseisms and earthquake damage: Northridge, CA, earthquake of 17 January, 1994, Soil Dyn. Earthquake Eng. 19(4), 253–267. Trifunac, M. D. and Todorovska, M. I. (2000b) Can aftershock studies predict site amplification? Northridge, CA, earthquake of 17 January, 1996, Soil Dyn. Earthquake Eng. 19(4), 233–251. Trifunac, M. D. and Todorovska, M. I. (2004) 1971 San Fernando and 1994 Northridge, California, earthquakes: Did the zones with severely damaged buildings reoccur?
Discussion and Conclusions I have illustrated the contemporary approaches for inclusion of the eﬀects that local site conditions have on the amplitudes of strong ground motion and how those approaches are essentially based on concepts that have evolved from classical linear-wave-propagation theory. While this approach works in the far field, I showed examples of how it ceases to apply in the near field, where the buildings get damaged and where the soil experiences large nonlinear and permanent deformations.