Probabilistic seismic hazard analysis of peak ground acceleration for major regional New Zealand locations

IF 0.8 Q4 ENGINEERING, GEOLOGICAL
B. Bradley, M. Cubrinovski, F. Wentz
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引用次数: 5

Abstract

This paper presents site-specific probabilistic seismic hazard analysis (PSHA) results at 24 locations throughout New Zealand (NZ). Specifically, peak ground acceleration (PGA) hazard curves for two generic soft soil conditions are considered. For specific return periods of interest, seismic hazard disaggregation is used to obtain the percentage contributions of various seismic sources to the hazard, including metrics such as mean earthquake magnitude used for simplified geotechnical calculations. The seismic hazard analyses utilise concensus models for seismic source and ground-motion characterisation, including consideration of alternative ground-motion models. The analyses therefore represent an appreciable improvement relative to the science that underpin current loading standards [e.g., 1,2]. Consequently, we advocate the use of these results as a scientific basis for potential revisions to standards and guidance documents that characterise seismic hazard via PGA.
新西兰主要地区地面加速度峰值的概率地震危险性分析
本文介绍了在新西兰(NZ) 24个地点的特定地点概率地震危害分析(PSHA)结果。具体来说,考虑了两种软土条件下的峰值地面加速度(PGA)危险曲线。对于特定的回报期,地震灾害分解用于获得各种震源对灾害的百分比贡献,包括用于简化岩土计算的平均地震震级等指标。地震危险性分析利用震源和地震动特征的一致性模型,包括考虑备选地震动模型。因此,与支撑当前荷载标准的科学相比,分析代表了一个明显的改进[例如,1,2]。因此,我们主张将这些结果作为潜在修订标准和指导性文件的科学依据,这些标准和指导性文件通过PGA来描述地震危险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
2.50
自引率
17.60%
发文量
14
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