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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.
Based on the kinematic source model, the numerical simulation of strong ground vibration under different source parameters is carried out. The results show that the strong ground motion distribution with different results will occur in different rupture processes. The simulation result of a deterministic hypocenter parameter can not be used as the seismic hazard of active faults Therefore, the key to solving the problem is that the calculation of the ground vibration assessment is only through a large number of three-dimensional simulation of the earthquake ground motion, which is a reasonable development direction. How to consider the reasonable source parameters.