On site coefficients

Authors:  
Rubric:     Seismic zoning   
Annotation:
Introduction into practice of engineering-seismological researches of the description of seismic impacts by instrumental characteristics demands use of site coefficients for the account of influence of structure features and characteristics of the top part of a geological section. The article shows that the site coefficients, at least in the field of linear representations, can be uniquely describe through a single parameter of the soils – the average seismic rigidity of the 30-meter thickness composing the upper part of the cut. Simple relations allowing determining the response spectrum of soil by parameters of the soil model are deriving. By means of site coefficients, it is possible to construct a response spectrum of a soil model and to calculate necessary characteristics of seismic impacts. In the field of nonlinear coupling of soil model properties and seismic effects parameters, it is proposing to use reduction coefficients.