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ISO 3010:2017 pdf free

ISO 3010:2017 pdf free.Bases for design of structures一Seismic actions on structures
The seismicity of the region where a structure is to be constructed is usually indicated by mapping a seismic zoning parameter [peak ground motion value(s) or design ground motion spectral response value(s)], which should be based on either the seismic history or on seismological data of the region (including active faults), or on a combination of historical and seismological data. In addition, the expected values of the maximum intensity of the earthquake ground motion in the region in a given future period of time should be determined on the basis of the regional seismicity.
NOTE There exist many kinds of parameters which can be used to characterize the intensity of earthquake ground motion. These are seismic intensity scales, peak ground acceleration and velocity,“effective” peak ground acceleration and velocity, spectral response parameters that are related to smoothed response spectra, input energy, etc. Often, these parameters are determined by a probabilistic seismic hazard analysis to give uniform hazard for a range of natural periods of vibration. In some cases, the hazard analysis is extended to encompass the variation in hazard level with probability level and to integrate that variation with structural fragility to reach a consistent reliability against collapse.
Dynamic properties of the supporting soil layers of the structure should be investigated and the effect on the ground motion at the site should be considered. Geographical and geological conditions and influence of deep subsurface structure (basin effects) should also be taken into consideration.
The ground motion at a particular site during earthquakes has a predominant period of vibration which, in general, is shorter on firm ground and longer on soft ground. Attention should be paid to the possibility of local amplifications of earthquake ground motions, which may occur (inter alia) in the presence of soft soils and near the edge of alluvial basins. The possibility of liquefaction should also be considered, particularly in saturated, loose, cohesionless soils.ISO 3010 pdf download.

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