By Tom Schanz, Roumen Iankov
This quantity covers papers offered at NATO ARW 983188 “Coupled website and Soil-Structure interplay results with program to Seismic possibility Mitigation”, held in Borovets, Bulgaria, from thirtieth of August to third of September 2008. the most target of the workshop was once to offer a state-of-the-art on site-soil-structure-interaction results, as manifested within the broader zone of South and South-Eastern Europe, that is undoubtedly the main seismically-prone area of the ecu continent. A moment goal used to be to aim a definition of the seismic threat posed to the equipped setting during this region and to provide glossy tools for seismic danger mitigation. Papers integrated during this quantity are grouped into 4 chapters: (1) website stipulations and their function in seismic risk analyses; (2) Soil-structure-interaction; (3) The position of web site results and of soil-structure-interaction in layout of constructions; and (4) common and similar matters. the next topic fields are addressed: seismological elements (near-field results, seismic wave propagation, free-field motions); geotechnical engineering (slopes, foundations, lifelines, dams, holding 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)
7b), we consider 200, 300, 400, 500, and 1,100 m/s. In Fig. , 1990)). In Fig. , 1985). THE NATURE OF SITE RESPONSE DURING EARTHQUAKES 25 Figures 7a and b show that only for Ts and Mz rock sites, and for shearwave velocities in the soil equal to 500 and 1,100 m/s, there were more pipe breaks than damaged buildings (compared with the respective total area averages). This is due to hillside ground conditions at most of the sites contributing to the data set and the occurrence of landslides. Figure 7d shows that for the sites with “moderate”, “high”, and “very high” liquefaction susceptibility there were proportionally fewer damaged buildings than pipe breaks (compared with the respective total area averages), by approximately a factor of two.
To illustrate this, we correlate a normalized measure of damage with nonlinear site response and consider diﬀerent descriptions of the local site properties (measured or postulated), as shown in Fig. 7. In this figure, we plot the number of redtagged (solid points represent seriously damaged) and yellow-tagged (open circles represent moderately damaged) buildings per 1,000 housing units, normalized relative to the area average versus the number of pipe breaks per 1,000 housing units per area average.
1999; Trifunac and Ivanovi´c, 2003a,b). Figure 4a shows by solid dots (“obvious” peaks) and open circles (“notso-obvious” peaks) the periods of spectral peaks that can be identified during 41 events (listed according to the amplitude of their peak velocity, shown on THE NATURE OF SITE RESPONSE DURING EARTHQUAKES 17 Figure 4a. , 1999). , 1981) during the 1994 Northridge earthquake (main event) and 40 of its aftershocks that triggered the accelerograph at this station. 55 s, which reappear in many records.