机构地区: 中国地震局工程力学研究所
出 处: 《地震学报》 2006年第6期638-644,679,共7页
摘 要: 基于一个假设的活断层和设定地震以及与之相应的计算模型,采用显式有限元方法结合改进的透射人工边界以及含有高频振动的震源时间函数,预测了该断层在设定地震为矩震级MW=634时的近断层基岩强地面运动.预测结果表明,改进的透射人工边界具有良好的数值稳定性;预测基岩强地面运动的特征与近断层基岩强地面运动特征的现有认识水平有较好的一致性. Based on presumed active fault and corresponding model, this paper predicted the near-fault ground motion filed of a scenario earthquake (Mw=6 3/4) in an active fault by the explicit finite element method in combination with the source time function with improved transmitting artificial boundary and with high-frequency vibration contained. The results indicate that the improved artificial boundary is stable in numerical computation and the predicted strong ground motion has a consistent characteristic with the observed motion.