SGER: Development of a Flexible Container for Centrifuge Differential Ground Motion Simulation

这个项目的动机是将离心机模型扩展到岩土地震工程中一般三维地面运动的模拟。朝着这个方向迈出的一步是离心机差分地面运动模拟器(CDGMS)的新概念。这一行动是为了根据探索研究小额赠款计划，支持对Flexibase容器设计的探索和测试，该设计可以通过多振动台系统向离心机土壤模型提供均匀、线性、二次或不连续的运动。Flexibase容器将允许模拟三维地震特征，如非垂直地震入射、行波和近场效应引起的地震特征。通过对离心力下不同土壤-容器设计的详细动态分析，使用有限元建模来实现最优设计。计算平台还将提供一个有效的框架，用于在最终设计中反复选择材料、几何形状、轴承和其他机械部件。然后，将在适当的地方制造成比例的原型，以进行物理测试和性能评估。

The motivation for this project is the extension of centrifuge modeling to the simulation of general three-dimensional ground motions in geotechnical earthquake engineering. One step in this direction is the novel concept of a Centrifuge Differential Ground Motion Simulator (CDGMS). This action is to support, under the Small Grants for Exploratory Research program, the exploration and testing of a Flexibase container design that can deliver uniform, linear, quadratic or discontinuous motions to a centrifuge soil model via a multi-shake table system. cThe Flexibase container will permit the simulation of three- dimensional seismic characteristics, such as those arising from non-vertical seismic incidence, traveling waves and near-field effects.Finite element modeling is used to achieve an optimal design via detailed dynamic analysis of different soil-container designs under centrifugal forces. The computational platform will also provide an efficient framework for iterative selection of materials, geometries, bearings and other mechanical components in the final design. Scaled prototypes will then be fabricated where appropriate for physical testing and performance evaluation.