TY - RPRT U1 - Forschungsbericht A1 - Werkle, Horst A1 - Movila, Ioan T1 - Earthquake Response Spectra of a Soft Soil Layer over a Half-Space N2 - Earthquake response spectra as defined by Eurocode 8 (German NAD) are restricted to soils with shear wave velocities greater than 150 m/s. For soft soil layers e.g. of clay underlain by bedrock special investigations are required because resonance effects of the layer significantly influence the shape of the spectrum. Numerical investigations are normally based on a one-dimensional theory of horizontally polarized shear waves propagating in vertical direction. The paper describes a parametric study to define acceleration response spectra for a soft soil over a half-space for a wide range of soil layer heights and material parameters. Based on this study a simplified method to describe response spectra for the model of a soft soil layer underlain by a viscoelastic halfspace is given. KW - Earthquake resonse spectra KW - Soft Soil Layer KW - Site effect KW - Geotechnical Earthquake Engineering Y2 - 2015 U6 - https://nbn-resolving.org/urn:nbn:de:bsz:kon4-opus-3015 UN - https://nbn-resolving.org/urn:nbn:de:bsz:kon4-opus-3015 SP - 211 S1 - 211 ET - Revised Version November 2015 ER -