ANALYSIS OF 3-DIMENSIONAL STRONG GROUND MOTIONS ALONG PRINCIPAL AXES, SAN-FERNANDO EARTHQUAKE

被引：36

作者：

KUBO, T

PENZIEN, J

机构：

[1] University of Tokyo, Tokyo

[2] University of California, Berkeley, California

来源：

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS | 1979年 / 7卷 / 03期

关键词：

D O I：

10.1002/eqe.4290070306

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An orthogonal set of principal axes is defined for earthquake ground motions. These principal axes are obtained such that the corresponding variances of motion have maximum, minimum and intermediate values and the covariances equal zero. This indicates that the corresponding components of motion along the principal axes are uncorrelated with respect to each other. Since real earthquake accelerograms are assumed to be reasonably well represented by Gaussian random processes, the three components of motion along the principal axes are statistically independent of each other. Using these principal axes and applying the moving‐window technique to the ground accelerograms recorded during the San Fernando earthquake of 9 February 1971, time‐dependent characteristics of three‐dimensional ground motions along principal axes are determined. Results of the analysis indicate significant correlation between directions of principal axes and directions from the recording stations to the fault slip zone. It is concluded that three components of ground motion can be generated stochastically with statistical independence being maintained, provided they are assumed to be directed along principal axes. Copyright © 1979 John Wiley & Sons, Ltd

引用

页码：265 / 278

页数：14

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