Equations for the estimation of strong ground motions from shallow crustal eUsing data from Europe and the middle east: Vertical peak ground acceleration and spectral acceleration

被引：48

作者：

Ambraseys N.N. ^{[3
]}

Douglas J. ^{[1
,3
]}

Sarma S.K. ^{[3
]}

Smit P.M. ^{[2
]}

机构：

[1] Dept. of Civ. and Environ. Eng., Imperial College London, South Kensington Campus, London

[2] ARN/RIS, BRGM, 45060 Orléans Cedex 2

[3] National Emergency Operations Centre

来源：

Bulletin of Earthquake Engineering | 2005年 / 3卷 / 1期

基金：

英国工程与自然科学研究理事会;

关键词：

Attenuation relations; Europe; Middle East; Strong ground motion estimation;

D O I：

10.1007/s10518-005-0186-x

中图分类号：

学科分类号：

摘要：

This article presents equations for the estimation of vertical strong ground motions caused by shallow crustal earthquakes with magnitudes M w 5 and distance to the surface projection of the fault less than 100km. These equations were derived by weighted regression analysis, used to remove observed magnitude-dependent variance, on a set of 595 strong-motion records recorded in Europe and the Middle East. Coefficients are included to model the effect of local site effects and faulting mechanism on the observed ground motions. The equations include coefficients to model the observed magnitude-dependent decay rate. The main findings of this study are that: short-period ground motions from small and moderate magnitude earthquakes decay faster than the commonly assumed 1/r, the average effect of differing faulting mechanisms is similar to that observed for horizontal motions and is not large and corresponds to factors between 0.7 (normal and odd) and 1.4 (thrust) with respect to strike-slip motions and that the average long-period amplification caused by soft soil deposits is about 2.1 over those on rock sites. © Springer 2005.

引用

页码：55 / 73

页数：18

共 19 条

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