Prediction of Strong Ground Motion for Earthquake Hazard Mitigation

这一行动是为了继续支持ECE-8408227。其目的是根据邻近断层可能发生的地震来预测特定建筑工地的地面运动。预测是基于对断层带发生的物理过程的了解、断层上地震的历史记录、地震波传播所经过的岩石圈的性质、以及特定地点的地面对入射地震波的反应。重点将放在：(1)建立了从断层的地球物理和地质观测中估计特征震源参数的统一理论；(2)进一步研究了长期地震活动性与地壳质量因子的关系；(3)一维土体放大模型的适用范围研究；(4)非线性对强地震动的影响研究。他在这一领域的研究是国际公认的。他有能力和现有的机构设施来完成所提议的研究，预计将产生岩土工程师为减轻地震危害所迫切需要的信息。

This action is for continued support of ECE-8408227. The aim is to predict the ground motion at a particular construction site in terms of the earthquakes expected to occur on neighboring faults. The prediction is based upon a knowledge of physical processes occurring in the fault zone, the historical record of earthquakes on the fault, the properties of the lithosphere through which the seismic waves propagate, and the response of the ground at the particular site to the incoming seismic waves. The focus will be on: (1) development of a unified theory for estimating source parameters of a characteristic earthquake from geophysical and geological observations on a fault, (2) further study on the relation between long-term seismicity and the quality factor of the Earth's crust, (3) study of the limit of applicability of the 1-D model for soil amplification and (4) study of the effect of non-linearity on strong ground motion. The PI is internationally recognized for his research in this area. He has the ability and institutional facilities available to complete the research proposed which is expected to yield information which is urgently needed by geotechnical engineers for earthquake hazard mitigation.