Simulation of Three-Dimensional Ground Motion in Los Angeles from Large Earthquakes in Southern California

南加州大地震引起的洛杉矶三维地面运动模拟

• 批准号: 9628682
• 负责人: Kim Olsen
• 金额: $ 18万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628682&HistoricalAwards=false
• 关键词: Simulation; Three; Dimensional; Ground; Motion

9628682 Olsen This research involves the calculation of three-dimensional strong motion from large earthquakes applied to southern California situations. Intensive computational requirements earlier in this work have led to the development of algorithms that run on massively parallel computers. A 3-D 4th order staggered-grid finite-difference method was used to simulate wave propagation in a model of the Los Angeles basin including the 3-D structures of the Los Angeles and San Fernando basins. The results showed that even moderate earthquakes outside the basins can cause damaging motions within the basin due to basin effects. This project will further earlier work by comparing the 1992 M=7.3 Landers earthquake simulations with actual data, calculating the effect of varying rupture complexity of the earthquakes, and calculating the effects of topographic scattering. This research is a component of the National Earthquake Hazard Reduction Program. ***

9628682 Olsen 这项研究涉及计算应用于南加州情况的大地震的三维强运动。 这项工作早期的密集计算需求导致了在大规模并行计算机上运行的算法的开发。 使用 3-D 4 阶交错网格有限差分法来模拟洛杉矶盆地模型中的波浪传播，其中包括洛杉矶盆地和圣费尔南多盆地的 3-D 结构。 结果表明，即使是盆地之外的中度地震也会由于盆地效应而在盆地内部引起破坏性运动。 该项目将进一步开展早期工作，将 1992 年 M=7.3 Landers 地震模拟与实际数据进行比较，计算地震不同破裂复杂性的影响，并计算地形散射的影响。 这项研究是国家地震减灾计划的一部分。 ***