Abstract A mainshock earthquake is typically followed by a sequence of aftershocks, normally with a higher probability of occurrence within the first few days after the mainshock event. Quantifying the subsequent damage due to an aftershock event for a given structure that is already at some state of damage due to the mainshock event is an important task in seismic hazard and loss assessment. This task requires a framework to quantify the aftershock hazard in addition to the mainshock hazard that is already well defined. The present study aims to develop such a framework that facilitates the quantification of aftershock hazard given two sequential fault rupture scenarios—an approach that ultimately serves the basis for a hazard-consistent aftershock ground motion selection. To this end, conditioning criteria based on a single, two, and average-of-multiple intensity measures are utilized in order to select hazard-consistent aftershock records from databases comprising both mainshock and aftershock events. The primary outcome of this study is, thus, a stochastic framework that defines the aftershock seismicity of a given site and enables the aftershock ground motion selection for performance-based seismic assessment and design of structures.

中文翻译：

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基于多种强度测量的条件标准，用于选择与灾害一致的余震地面运动记录

摘要 主震地震后通常会发生一系列余震，通常在主震事件发生后的最初几天内发生的概率较高。对于已经由于主震事件而处于某种损坏状态的给定结构，量化由于余震事件造成的后续损坏是地震危险和损失评估中的一项重要任务。除了已经明确定义的主震危险之外，这项任务还需要一个框架来量化余震危险。本研究旨在开发这样一个框架，在给定两个连续断层破裂情景的情况下促进余震危险的量化——这种方法最终为与危险一致的余震地面运动选择提供了基础。为此，条件标准基于一个、两个、为了从包括主震和余震事件的数据库中选择与灾害一致的余震记录，使用多重强度测量的平均值。因此，这项研究的主要结果是一个随机框架，它定义了给定地点的余震地震活动性，并使余震地震动选择能够用于基于性能的地震评估和结构设计。