摘要
在工程场地的地震安全性评价工作中,建议选取工作区范围不小于150km。由于工作区范围的大小取值对地震危险性评价结果的具体影响很少有人专门讨论,因而实际工作中缺少对工作区选取的参考资料。以西安市一场地为场点,通过400km范围内远、中、近若干个高震级潜源对场点不同周期地震动贡献大小的分析,讨论了在不同工程、不同场地条件、不同抗震设防水准下,远场范围取舍中值得注意的若干问题。
In the work of seismic safety estimation of an engineering site, the national standard'technology standard of seismic safety estimation in engineering site'(GB17741-1999) advises that the selected working region should be more than 150 km distance. Since the effect of selection of work region on result of seismic safety estimation has been seldom discussed, there are no materials to be referenced in practice. In this paper, regarding one field of Xian city as a site point and analyzing contribution of site point of far, mid and near potential sources with high-magnitude in different period earthquake ground motion about 400 km range, the authors studied some problems about working region selection in different situation of engineering ,site condition and standard of seismic resistance.
基金
中国地震局九五重点项目(95-05-03-05-08)
