对长春市区贡献量最大潜在震源区的确定

Study on the Most Dominant Potential Seismic Source Zone of Changchun City

采用地震危险性分析软件SHA,对长春市区一个场址进行地震危险性分析,分别计算得到周期为0s、1.0s和6s时,长春市区附近存在的各潜在震源区对场址地震危险性的贡献量。计算结果表明:长春潜在震源区在短周期时对场址贡献量最大,舒兰和松原潜在震源区在长周期时对场址贡献量最大。研究不同周期时对场址贡献量最大的潜在震源区,符合工程的实际情况,能够使最终确定的地震动参数更为合理可靠。

Using seismic hazard analysis software SHA, we make the seismic hazard analysis on a site located in the center of Changchun city. Periods of seismic risk of each potential seismic zone in the district around Changchun are calculated separately at 0s, 1.0s, 6.0s. The results show that contribution of Changchun potential seismic zone to the site is the largest for short period; Shulan and Songyuan potential seismic source zones are the most dominant potential seismic source zones for long period. Studying the most dominant potential seismic source zone to seismic risk for different periods, it is in line with the actual situation of the project, and it enables the final ground motion parameters more reasonably and reliably.