Numerical Analyses of Seismic Ground Rotations from the Wave Passage Effects

Chapter
Part of the Geotechnical, Geological and Earthquake Engineering book series (GGEE, volume 24)

Abstract

This chapter presents the problem of deriving rotational ground motions (torsion about vertical axis and rocking about horizontal axis) from the wave decompositions of translational ground motions. Respective formulas for the torsional and rocking power spectral densities are formulated in terms of translational acceleration seismic components. The numerical analysis shows that rotational components are shifted to higher frequencies compared to the respective translational ones and are inversely proportional to the shear wave velocity at a site, which means that they will be more pronounced for softer than hard sites.

Keywords

Ground Motion Rayleigh Wave Shear Wave Velocity Body Wave Torsional Component 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Faculty of Civil Engineering, Department of Structural MechanicsOpole University of TechnologyOpolePoland

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