【摘要】 基于运动学震源模型,进行了不同震源参数情形下强地面震动数值模拟.结果表明,不同的破裂过程会产生差别甚大的强地面运动分布,一次确定性震源参数的模拟结果不能作为活动断层地震危害性评价的指标,只有通过大量三维地震动场模拟计算,给出地面震动评估的统计结果,才是比较合理的发展方向.由于一次三维地震动场计算耗时很大,因此解决问题的关键是如何考虑合理的震源参数.更多还原

【Abstract】 Based on the kinematic source model,strong ground motion is simulated in this paper with various kinds of source parameters. The results show that different rupture mode will generate very different distribution of strong ground motion;the result obtained with a definite set of source parameters can not be regarded as a criterion for earthquake hazard assessment on active fault. The reasonable method is to gain a statistic result from large numbers of simulation of 3-D ground motions. Because of computation cost for one simulation,the key problem would be how to determine source parameters reasonably.更多还原