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Characteristics of horizontal ground motion measures along principal directions 被引量:1
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作者 k.goda 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2010年第1期9-22,共14页
Ground motion records are often used to develop ground motion prediction equations (GMPEs) for a randomly oriented horizontal component, and to assess the principal directions of ground motions based on the Arias in... Ground motion records are often used to develop ground motion prediction equations (GMPEs) for a randomly oriented horizontal component, and to assess the principal directions of ground motions based on the Arias intensity tensor or the orientation of the major response axis. The former is needed for seismic hazard assessment, whereas the latter can be important for assessing structural responses under multi-directional excitations. However, a comprehensive investigation of the pseudo-spectral acceleration (PSA) and of GMPEs conditioned on different axes is currently lacking. This study investigates the principal directions of strong ground motions and their relation to the orientation of the major response axis, statistics of the PSA along the principal directions on the horizontal plane, and correlation of the PSA along the principal directions on the horizontal plane. For these, three sets of strong ground motion records, including intraplate California earthquakes, inslab Mexican earthquakes, and interface Mexican earthquakes, are used. The results indicate that one of the principal directions could be considered as quasi-vertical. By focusing on seismic excitations on the horizontal plane, the statistics of the angles between the major response axis and the major principal axis are obtained; GMPEs along the principal axes are provided and compared with those obtained for a randomly oriented horizontal component; and statistical analysis of residuals associated with GMPEs along the principal directions is carried out. 展开更多
关键词 Arias intensity attenuation relation bi-directional seismic excitation ground motion prediction equation principal direction pseudo-spectral acceleration response axis
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事件间地面运动峰值与反应谱空间相关的变异性
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作者 k.goda 陈尚尉(译) +2 位作者 姚菲菲(译) 赵大千(译) 吕春来(校) 《世界地震译丛》 2012年第5期1-11,共11页
地面运动峰值和反应谱的空间相关模型是将目前概率地震灾害分析和危险性分析从单一地点扩展到多个地点的关键分量,并便于在包括空间分布的建筑物和基础设施地震损失评估及震动图插值等工作中广泛应用。尚未得到彻底研究的重要方面之一... 地面运动峰值和反应谱的空间相关模型是将目前概率地震灾害分析和危险性分析从单一地点扩展到多个地点的关键分量,并便于在包括空间分布的建筑物和基础设施地震损失评估及震动图插值等工作中广泛应用。尚未得到彻底研究的重要方面之一是不同地震事件中事件间的空间相关变异性。本研究探讨这一问题。为此目的,我们建立了一个合并广泛的地面运动数据库;使用了41个记录完好地震的9000多个记录。分析结果说明,相对于典型的空间相关模型,在地震灾害和危险性计算中需要包括的空间相关变异性范围大约是±0.1个单位。 展开更多
关键词 空间相关 地面运动 地震事件 反应谱 异性 峰值 地震损失评估 危险性分析
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