[rotation] Rotations in Strong-motion Seismology

Graizer, Vladimir Vladimir.Graizer at nrc.gov
Wed Nov 9 01:35:29 CET 2011

Dear colleagues,
We would like to bring your attention to the special session at the upcoming 2012 Seismological Society of America meeting (17-19 April, 2012, San Diego, California).

Rotations in Strong-motion Seismology

Significant progress has been made in observing and analyzing rotational ground motions in recent years. Accurate measurements of these additional components of ground motion are especially important in strong-motion seismology and earthquake engineering. Rotational motion and its effects on strong-motion data have been ignored for their much smaller amplitudes than that of the translational motions. However, recent observations from large ground motions suggest that these effects might be underestimated and detailed analyses of these effects are necessary. Rotational components of earthquake ground motion are usually not considered for seismic analysis, design and performance assessment at this time because time-series recordings of these components are rare. A number of procedures have been proposed to extract rotational components of ground motion from translational time series recorded by arrays of closely spaced stations. There are also new sensors capable of recording point rotations, and some of them have already been used in field and laboratory measurements. We invite submission of presentations that document progress in measurement, analysis, application, and theory of rotational strong-motion. We specifically emphasize rotational strong-motions of the order of 10-5 and higher (up to ~ 10-2) rad that can produce significant effect on structures.

Session Chairs
Vladimir Graizer <Vladimir [dot] Graizer [at] nrc [dot] gov>
Maria Todorovska <mtodorov [at] usc [dot] edu

Best regards,

Vladimir Graizer
Maria Todorovska

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