Computing Green's Functions for the Seismic Response Analysis of Layered Earth Strata

长期以来，工程科学家一直对计算作用于有限或无限范围具有非均质性质的固体中的动载荷感兴趣。这项研究项目是这项工作的延续，具体应用于国家减少地震危害计划。在考虑地震波在地壳中的传播，以及在大坝或核电站等特定建筑设施中产生的地面震动时，人们试图考虑地球的非均匀性；然而，这通常会导致严重的分析或计算困难。这项研究计划将利用首席研究员在这方面取得的重大进展，并将其扩展到解释地球的分层。该方法计算效率高，可广泛应用于结构基础和地下设施的动力分析等地震工程问题。首席研究员因其在该研究领域的专业知识和贡献而受到认可。预计该研究将大大提高包括地球不均匀性对地震引起的地面运动的影响以及所建设施的相关反应的能力。

Engineering scientists have long been interested in calculating the dynamic loads acting in a solid of finite or infinite extent, with heterogeneous properties. This research program is a continuation of this effort with specific application to the National Earthquake Hazard Reduction Program. In considering the propagation of seismic waves through the earth's crust, and of the resultant ground shaking at a particular constructed facility such as a dam or nuclear power plant, an attempt is made to take account of the earth's inhomogeneity; this however usually leads to severe analytical or computational difficulties. This research program will capitalize on a significant advance that the principal investigator has made in this regard, and will extend it to account for the layered stratification of the earth. The method is expected to be computationally efficient and will be of use in a wide range of earthquake engineering problems, such as the dynamic analysis of structural foundations and underground facilities. The principal investigator is recognized for his expertise in, and contribution to, this area of research. It is expected that the research will provide a significantly improved capability to include the effect of the earth's inhomogeneity on earthquake induced ground motion and the associated response of constructed facilities.