...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Earthquake Engineering >Establishment of a Time-Varying Modified Kanai-Tajimi Non Stationary Stochastic Model of Seismic Records Based on the S-transform
【24h】

Establishment of a Time-Varying Modified Kanai-Tajimi Non Stationary Stochastic Model of Seismic Records Based on the S-transform

机译：基于S变换的时变修正Kanai-Tajimi非平稳地震记录随机模型的建立

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This article investigates the time-varying characteristics of seismic records. Time-varying amplitude and energy spectrums are defined to reflect the time-frequency dependence, and a general formulation of the S-transform is introduced. The S-transform is tested with various window functions to analyse the Kobe seismic records. The results indicate that using a complex window function with properly adjusted parameters gives favorable outcomes. Analyses of three soil sites show that sites with hard soil feature seismic records with shorter stationary durations, higher frequency centers, and broader frequency bands than other soil sites. The average time-varying spectrums of the seismic records are simulated using a uniform non stationary stochastic model and a time-varying modified non stationary Kanai-Tajimi stochastic model. Empirical formulas are established for the time-varying spectrums of the earthquake records from these sites by nonlinearly fitting stochastic models to the record data. The values of the time-varying spectrum factors for different earthquake intensities and sites agreeing with the Chinese Seismic Code are obtained. Based on these analyses and observations, we propose using the solutions to the stochastic models to simulate non stationary ground motions.
机译：本文研究了地震记录的时变特征。定义随时间变化的幅度和能谱以反映时频依赖性，并介绍了S变换的一般公式。使用各种窗口函数测试S变换，以分析神户地震记录。结果表明，使用带有适当调整参数的复杂窗口函数可获得良好的结果。对三个土壤位点的分析表明，与其他土壤位点相比，具有坚硬土壤位点的地震记录具有较短的固定持续时间，较高的频率中心和较宽的频带。利用统一的非平稳随机模型和时变修正的非固定Kanai-Tajimi随机模型模拟了地震记录的平均时变谱。通过将随机模型非线性拟合到记录数据中，为来自这些地点的地震记录的时变频谱建立了经验公式。得到了不同地震烈度和地点与中国地震法一致的时变谱因子值。基于这些分析和观察，我们建议使用随机模型的解来模拟非平稳地面运动。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号