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

这个项目的动机是扩展离心模型的岩土地震工程中的一般三维地面运动的模拟。 在这个方向上的一个步骤是一个新的概念，一个快速差分地面运动模拟器（CDGMS）。 这项行动是为了支持，根据探索性研究计划的小额赠款，探索和测试一种可通过多振动台系统向离心土壤模型提供均匀、线性、二次或不连续运动的基于容器的设计。 c土容器的底部可以模拟三维地震特性，例如非垂直地震入射、行波和近场效应。有限元建模通过对离心力作用下不同土容器设计进行详细的动态分析，实现最佳设计。 计算平台还将为最终设计中的材料、几何形状、轴承和其他机械部件的迭代选择提供有效的框架。 然后，在适当的情况下，将制造按比例缩放的原型，用于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.