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本文根据西安市区200多个深度大于80米的钻孔资料,将剖面的土层组合归纳为16种类型,用Wilson-θ法作地震反应计算得到各类剖面的地表最大加速度反应谱,勾划了西安市区最大加速度等值线图和反应谱类型分区图。通过分析对比作者认为,地貌单元对地震动分区有明显的控制作用,地貌单元内的土层组合对地震动起着局部的控制作用。
Based on more than 200 borehole data of more than 80 meters in Xi’an area, the paper summarizes the soil layer combinations of the sections into 16 types and calculates the maximum surface acceleration response spectrum of all kinds of sections by the Wilson-θ method. Draw the Xi’an area maximum acceleration contour map and response spectrum type zoning map. By analyzing and contrasting the author’s opinion, the geomorphic units have a significant control over the zoning of the earthquakes, and the combination of the soil layers in the geomorphic units plays a partial controlling role on the earthquakes.