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On the design of a dense array to extract rotational components of earthquake ground motion

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Abstract

Data recorded from dense seismic arrays such as the Large Scale Seismic Testing array in Lotung, Taiwan, are used for multiple purposes, including development of attenuation and coherency functions, computing dynamic strains in soil, and estimating rotational components of ground motion. The required footprint of a seismic array deployed to compute rotational components of ground motion is a function of the method used for the computations and site specific characteristics, including the apparent seismic wave velocity and the frequency content of expected ground motions. A design procedure for a general two-dimensional seismic array is presented together with a site-specific example using the Surface Distribution Method to extract the rotational components of ground motion. A sensitivity study is performed to determine how the location of recording stations of translational motion in a dense array affects the computed rotational components of earthquake ground motion.

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Acknowledgments

The financial support for the studies described herein was provided by MCEER (www.mceer.buffalo.edu) under Thrust Area 3, Innovative Technologies, through a grant from the State of New York. The authors gratefully acknowledge the Institute of Earth Science, Academia, Sinica, Taiwan for sharing strong motion data. The financial support, technical review and provision of data are gratefully acknowledged. Any opinions, findings, conclusions or recommendations expressed in this paper are the authors and do not necessarily reflect those of either MCEER or the State of New York.

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Authors and Affiliations

  1. Department of Civil Engineering, Indian Institute of Technology Gandhinagar, Gandhinagar, India

    Dhiman Basu

  2. Department of Civil, Structural and Environmental Engineering, University at Buffalo, State University of New York, Buffalo, NY, USA

    Dhiman Basu, Andrew S. Whittaker & Michael C. Constantinou

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  1. Dhiman Basu
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  2. Andrew S. Whittaker
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  3. Michael C. Constantinou
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Correspondence to Dhiman Basu.

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Basu, D., Whittaker, A.S. & Constantinou, M.C. On the design of a dense array to extract rotational components of earthquake ground motion. Bull Earthquake Eng 15, 827–860 (2017). https://doi.org/10.1007/s10518-016-9992-6

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  • DOI: https://doi.org/10.1007/s10518-016-9992-6

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