Modeling of Building - Foundation Response to Earthquake Ground Motion Using a Geotechnical Centrifuge

抗震结构的安全经济设计 需要了解由以下因素引起的动态运动 地震荷载 结构与 它的地基土支撑可以有显着的影响， 结构的反应。 本研究项目是对建筑地基进行研究， 地震激励下的相互作用 一个实验项目是 在土工离心机上进行， 地面多层建筑性能 基础（与桩基础相反）， 地震地面运动 该研究包括调查 自由场运动，基础的稳态振动，以及 充分发挥结构-地基-土相互作用的作用。 这 信息被纳入数学模型， 描述地面基础上建筑物的动态运动， 受到地震的激励。 该数学模型也可用于验证、校准和 联合收割机结合了已提出的各种分析方法。 研究的另一个成果是进一步提高使用 土工离心机用于复杂土结构研究 互动问题。

The safe, economical design of earthquake-resistant structures requires an understanding of the dynamic motions resulting from earthquake loading. The dynamic interaction between a structure and its foundation-soil support can have a significant influence on the response of the structure. This research program is investigating the building-foundation interaction under seismic excitation. An experimental program is being conducted on geotechnical centrifuges to simulate the performance of multi-story buildings constructed on surface foundations (as opposed to pile foundations) when subjected to earthquake ground motions. The study includes investigations of the free-field motion, steady-state vibrations of foundations, as well as the full structure-foundation-soil interaction phenomenon. This information is being incorporated into a mathematical model to describe the dynamic motions of buildings on surface foundations when subjected to earthquake excitations. This mathematical models can also be used to validate, calibrate, and combine various analytical procedures that have been proposed. Another outcome of the study is to further the capability of using the geotechnical centrifuge to investigate complex soil-structure interaction problems.