Faculty Awards for Women: An Integrated Approach to Seismic Hazard and Vulnerability Assessment

拟议研究的总体目标是制定一项 地震危险性和风险评估的统一方法。 这 将通过以下任务实现这一目标：1）推进 断层分段模型的研究将为 开发空间相关的地震发生模型， 以前没有考虑过。 的附加信息 应力状态和应变释放率沿着断层将有助于 为这样一个模型的关键参数的发展。 2)一 地球物理地面运动模拟模型将与 地震发生模型用于场地灾害评估。 的 正常模式方法已成功地用于以前的NSF- 支持的研究项目。 其他方法，如光线跟踪， 弹性动力学绿色函数和经验绿色函数 将进行审查，以确定其是否适合实施。 3)在任务2下模拟的地面运动将是坚实的地面 条件 以反映当地土壤条件对 模拟地面运动，一维线性土壤将 用来预测地表的运动。 4)的损害 结构的潜力将通过一个整体损伤来表现 反映整体结构性能的指数。 但 结构部件或管道的损坏指数将是 根据最大响应参数 累积响应参数。 的能量的量度 通过刚度退化的结构耗散将是 用于定义该索引。

The overall objective of the proposed research is to develop a unified approach to seismic hazard and risk evaluation. This objective will be achieved through the following tasks: 1) Advances on segmentation models of faults will provide the basis for developing spatially dependent earthquake occurrence models which have not been previously considered. Additional information of the state of stress and strain release rates along faults will aid in the development of key parameters for such a model. 2) A geophysical ground motion simulation model will be combined with the earthquake occurrence model for site hazard estimates. The normal mode method was successfully used in a previous NSF- supported research project. Other methods such the ray tracing, elasto-dynamic Green's functions, and empirical Green's functions will be reviewed to determine their suitability for implementation. 3) Ground motions simulated under task 2 will be for firm ground conditions. To reflect the effect of local soil conditions on the simulated ground motions, a one-dimensional linear soil will be sued to predict motions at the ground surface. 4) The damage potential of structures will be represented through a global damage index which reflects the overall structural behavior. However, a damage index for structural components or subassemblies will be developed in terms of the ratio of the maximum response parameter to a cumulative response parameter. A measure of the energy dissipation of the structure through stiffness degradation will be used to define this index.