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本文是“地表地震反应的理论计算”一文的实际应用。选取1976年(?)陵地震中位于一个极震区(烈度Ⅸ度)镇安盆地内具有明显震害差异的二个邻近场地作为分析对象,在给定的输入基底运动下计算了各场地的地震反应。其结果:(1)计算得到地表加速度反应的最大值与宏观震害相吻合。由此确信,采用作者导出的表达式计算特定场地土层的地震反应是恰当的。(2)场地土层对输入基底运动有放大或减小作用,对震害和地震动的影响是包含由不同土壤特性组成的整个场地土层的综合作用结果。因此认为,在评定一个特定场地的地震烈度时,必须考虑一定深度范围的土壤情况。
This article is the practical application of “Theoretical Calculation of Surface Seismic Response”. Two adjacent sites with obvious seismic damage differences in a seismic zone located in a very seismic zone (intensity Ⅸ degree) in 1976 mantle earthquake were selected as the analysis objects. Under the given input base motion, Earthquake response. The results are as follows: (1) The maximum of the surface acceleration response is consistent with the macro-damage. It is therefore believed that it is appropriate to use the author’s derived expressions to calculate the seismic response of a particular site. (2) The soil layer in the site has the effect of amplifying or reducing the input base motion. The impact on the earthquake damage and earthquakes is the result of the comprehensive action of the entire site soil layer consisting of different soil characteristics. Therefore, it is considered that in assessing the seismic intensity of a particular site, soil conditions at a certain depth must be considered.