第五代与第四代区划图山西省域部分差异性初步研究

为明确第四代和第五代地震动参数区划图山西省域部分存在的差异,文章运用ArcGIS软件导入第四代和第五代地震动参数区划图(各两图),分别配准、矢量化、叠加,以两幅图进行对比,形象直观地反应两代区划图的空间变化。同时,通过数据的统计分析,得到加速度增大和降低地区的面积分别为加速度保持不变地区面积的0.26和0.02倍。且加速度面积增加也具有一定的特征;反应谱特征周期总提高面积为降低面积的7.56倍,反应谱特征周期总提高面积为保持不变面积的0.56倍;0.35s~0.40s和0.40s~0.45s增加的面积相当。

Preliminary Study of Difference between the Fifth and Fourth Zoning Map in the Area of Shanxi Province

The fourth and fifth seismic ground motion parameter zoning maps（Each has two figures） are compared after registration , vectorization and superposition ,by using ArcGIS software ,in order to look for the difference between the two generation zoning maps in the area of Shanxi Province .The spatial variation is revealed intuitively .Furthermore ,by statistical analysis ,the area where the seismic peak acceleration increases is 0 .26 times smaller than the area where it keeps unchanged ,where as the area where the peak acceleration decreases is 0 .02 times smaller than the area where it keeps unchanged .The area of peak acceleration increases has certain characteristics .The whole area where corner period of the seismic response spectrum increases is 7 .56 times larger than the area where it decreases and 0 .56 times smaller than the area where it keeps unchanged .The increased area where the corner period is within 0 .35 s-0 .40 s（including 0 .40 s） is equal to the increased area where the corner period is within 0 .40 s-0 .45 s（not including 0 .45 s ） .