epicentral distance meaning in English
震中距离
Examples
- At greater epicentral distances the rayleigh waves become very prominent .
当离震中距离更大时，瑞雪波才变得显著。 - Four records with different earthquake magnitude , epicentral distance and spectrum ingredient are selected as the seismic input . the result of it compared with the result of test and spectrum analysis . lastly , on the basis of analysis result the conclusion is drawn and the recommendation and perspectives are put forward
选取了el - centro波等四条不同震级、不同震中距及频谱成份不同的地震波作为输入波，对其进行了反应谱分析，计算结构在其作用下的动力反应，并与试验结果及反应谱分析结果进行对比。 - In addition , effects of several factors such as local site conditions , focal mechanism , epicentral distance and seismic magnitude on these parameters are discussed , and several significative results and conclusions are obtained . in all records there are about 1 / 3 vertical ground motion ’ s peak acceleration bigger than 2 / 3 of the corresponding horizontal one , so the action of vertical ground motion should not to be underestimated . vertical design response spectrum equals that the horizontal design response spectra times 65 % is probably unsafe when period is short , and suggest adopting different coefficients when at different periods
本文基于对大量欧洲强震记录的研究,分析了地震动竖向与水平向分量在峰值加速度、反应谱值、频谱周期等参数方面的差异,以及这些参数与场地、震源机制、震级和震中距的关系,得到了以下有意义的结果和结论:在本文分析的地震记录中大约1 / 3的记录加速度峰值比大于2 / 3 ,竖向地震动分量的作用不可低估;在短周期,竖向地震动影响系数的最大值仅取为水平向地震动影响系数最大值的65 %是偏于不安全的,可以考虑按周期分段采用不同的折减系数;我国现行抗震规范中设计反应谱特征周期的取值偏低,可能是偏于不安全的;竖向与水平向地震动分量卓越周期的比值在0 . 7 - 0 . 9之间,竖向设计反应谱的特征周期应有单独规定。