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THE USE OF REAL EARTHQUAKE ACCELEROGRAMS AS INPUT TO DYNAMIC ANALYSIS

机译:使用真实的地震加速度计作为动力分析的输入

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摘要

The increasing availability of strong-motion accelerograms, and the relative ease with which they can be obtained compared to synthetic or artificial records, makes the use of real records an ever more attractive option for denning the input to dynamic analyses in geotechnical and structural engineering. Guidelines on procedures for the selection of appropriate suites of acceleration time-series for this purpose are lacking, and seismic design codes are particularly poor in this respect. Criteria for selecting records in terms of earthquake scenarios and in terms of response spectral ordinates are presented, together with options and criteria for adjusting the selected accelerograms to match the elastic design spectrum. The application of both geophysical and response spectral search criteria is illustrated using compatible scenarios, and the selected records are analysed and adjusted to produce suites of acceleration time-series suitable for dynamic analyses. The paper concludes with suggestions for making use of real records in engineering analysis and design, and recommendations are given for improving the current guidelines provided in seismic design codes.
机译:与合成或人工记录相比,强运动加速度图的可用性不断提高,并且相对容易获得,因此使用真实记录成为拒绝将岩土工程和结构工程中的动力分析输入更为有吸引力的选择。缺乏用于为此目的选择适当的加速时间序列套件的程序的准则,并且在这方面抗震设计规范特别差。介绍了根据地震场景和响应频谱纵坐标选择记录的标准,以及用于调整所选加速度图以匹配弹性设计谱的选项和标准。使用兼容方案说明了地球物理和响应光谱搜索标准的应用,并对选定的记录进行了分析和调整,以生成适用于动态分析的加速时间序列套件。本文最后提出了在工程分析和设计中使用真实记录的建议,并提出了一些建议,以改进抗震设计规范中提供的现行指南。

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