《Earthquake Engineering and Structural Dynamics》杂志刊登“利用多站点的记录数据提取地震地面运动的旋转分量”

作者：Dhiman Basu, Andrew S. Whittaker, Michael C. Constantinou

刊物：《Earthquake Engineering and Structural Dynamics》，2013年，42卷第3期，451-468页

关键词：地震动旋转分量；多记录站；频谱；抗震设计；抗震性能评估

摘要：由于地震动旋转分量无法测得，所以其在抗震分析、设计和性能评估中不被考虑。目前有很多提取地震旋转分量程序是通过把多而密的地震记录站的数据进行时间序列的分析而得到的。本文提出了一种能够获得高频旋转时间序列的新方法。该方法将由频率引起的数值误差确定为视速波和数组维数的函数。其中本文提出的程序、广泛使用的测地线法以及作者开发的单记录站程序均基于台湾罗东记录站的数据而得到的。

Extracting rotational components of earthquake ground motion using data recorded at multiple stations

Authors: Dhiman Basu, Andrew S. Whittaker, Michael C. Constantinou

Journal: Earthquake Engineering and Structural Dynamics, Volume 42, Issue 3, pages 451-468, March 2013

Key words: rotational ground motion; multiple recording stations; spectra; seismic design; seismic performance assessment

Abstract: 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.

原文链接：http://onlinelibrary.wiley.com/doi/10.1002/eqe.2233/abstract