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基于Matlab的地震动参数综合确定
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作者 邵磊 胡刚 《地震科学进展》 2024年第8期515-522,共8页
本文主要介绍了基于Matlab编写的用于确定场地地震动参数的程序,从输入、处理和输出3大框架模块,结合笔者理解与经验对设计地震参数的确定过程进行较为详细分析。程序使用1个Excel文件整体控制输入参数,综合考虑了峰值加速度、场地类别... 本文主要介绍了基于Matlab编写的用于确定场地地震动参数的程序,从输入、处理和输出3大框架模块,结合笔者理解与经验对设计地震参数的确定过程进行较为详细分析。程序使用1个Excel文件整体控制输入参数,综合考虑了峰值加速度、场地类别、设计地震分组、区划图调整系数等因素,简化繁杂的反应谱数据处理过程,使用了不同规范推荐的规准谱,实现了钻孔反应谱的自动标定、自动保存图件并导出地震动参数表格;程序可对不同设计基准期、不同超越概率水准的多个钻孔、多条土层反应谱数据一次性综合分析,在处理区域性地震安全性评价等多场点工程项目时十分高效。文中对地震安全性评价工作中的实例进行了应用分析,程序既可以处理基岩反应谱,也可以对钻孔反应谱进行整体分析或单独分析,得到较为合理的场地地震动参数,有助于场地地震影响评价工作的开展。 展开更多
关键词 峰值加速度 反应谱 规准谱 特征周期 地震影响系数
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Bi-normalized response spectra and scalar periods for developing uniform seismic design spectra 被引量:3
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作者 徐龙军 谢礼立 《Journal of Southeast University(English Edition)》 EI CAS 2007年第2期266-271,共6页
Aiming at the uniform features of acceleration response spectra, two scalar periods-the response spectral predominant period Tp and the smoothed spectral predominant period To are employed to normalize the abscissa of... Aiming at the uniform features of acceleration response spectra, two scalar periods-the response spectral predominant period Tp and the smoothed spectral predominant period To are employed to normalize the abscissa of the normalized response spectra (NRS) of ground motions, respectively. Engineering characteristics of 5% -damped NRS, and the bi-normalized response spectra (BNRS) are investigated accounting for the effects of soil condition and fault distance. Nearly 600 horizontal ground motion components during the Chi-Chi earthquake are included in the analysis. It shows that the NRS strongly depends on soil condition and fault distance. However, soil condition and distance have only a slight influence on two kinds of BNRS. Dispersion analysis indicates that such normalization can reduce scatter in the derivation of response spectral shapes. Finally, a parametric analysis of the scalar periods (Tp, To) is performed and then compared with those of previous studies. These special and particular aspects of earthquake response spectra and scalar periods need to be considered in developing earthquake-resistant design criteria. 展开更多
关键词 ground motion normalized response spectrum bi-normalized response spectra scalar period
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