Extracting rotational components of earthquake ground motion using data recorded at multiple stations. (16th August 2012)

• Record Type: Journal Article
• Authors: Basu, Dhiman; Whittaker, Andrew S.; Constantinou, Michael C.
• Is Part Of: Earthquake engineering and structural dynamics. Volume 42:Number 3(2013:Mar.)
• Page Start: 451
• Page End: 468
• Publication Date: 2012-08-16
• Subjects: Structural dynamics -- Periodicals; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1002/eqe.2233
• Languages: English
• ISSNs: 0098-8847

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>Rotational components of earthquake ground motion have not been considered for seismic analysis, design and performance assessment because recordings of these components are unavailable. A number of procedures have been proposed to extract rotational components of ground motion from translational time series recorded at multiple, closely spaced recording stations. In this paper, a new procedure that is capable of capturing higher frequency content in rotational time‐series is presented. The frequencies at which numerical errors are introduced in the solution, which are a function of apparent wave velocity and array dimension, are identified. Results are presented for the proposed procedure, the widely accepted geodetic method, and a single‐station procedure developed by the authors, all using data recorded at the Lotung array in Taiwan. Copyright © 2012 John Wiley &amp; Sons, Ltd.</p> </abstract>