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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Displacement spectra and displacement modification factors, based on records from Greece
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Displacement spectra and displacement modification factors, based on records from Greece

机译：位移光谱和位移修正因子，基于希腊的记录

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摘要

Elastic and inelastic displacement spectra (for periods up to 4.0 s) are derived, using a representative sample of acceleration records from Greece, carefully selected based on magnitude, distance and peak ground acceleration criteria, and grouped into three ground type categories according to the Eurocode 8 (EC8) provisions. The modification factor for the elastic design spectrum adopted in EC8 for accounting for damping is verified herein and is found to be satisfactory in the short to medium period range and less so in the long period range. The equivalent viscous damping ratio concept is also evaluated and is found to lead to underestimation of inelastic displacement spectra. Finally, based on the previously derived elastic and inelastic spectra, equations suitable for design and/or assessment purposes, are proposed for the corresponding displacement modification factors.
机译：使用来自希腊的代表性加速度记录样本导出弹性和非弹性位移谱（长达4.0 s），并根据震级，距离和地面加速度峰值标准仔细选择，并根据欧洲规范分为三类地面类型8（EC8）条款。本文验证了EC8中用于考虑阻尼的弹性设计频谱的修正因子，发现该修正因子在中短期范围内令人满意，而在长期范围内则较小。还评估了等效的粘性阻尼比概念，并发现其导致了对非弹性位移谱的低估。最后，基于先前导出的弹性和非弹性谱，针对相应的位移修改因子，提出了适合设计和/或评估目的的方程式。

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