SGER: A Thermomechanical Framework for the Analysis of Liquefaction

SGER：液化分析的热机械框架

• 批准号: 0234009
• 负责人: Kumbakonam Rajagopal
• 金额: $ 7.48万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0234009&HistoricalAwards=false
• 关键词: SGER; Thermomechanical; Framework; Analysis; Liquefaction

0234009, K.R. Rajagopal, Texas A&M University"A Thermomechanical Framework for the Analysis of Soil Liquefaction "This action supports a new approach to modeling the phenomenon of soil liquefaction due to earthquake excitation.The liquefaction of saturated cohesionless soils involves a change in soil behavior from solid-like to fluid-like. The new approach involves the application of a general thermodynamic framework that has been quite successful in describing very diverse dissipative processes. This thermodynamic framework is particularly suited to describing the inelastic response of materials, and is very appropriate for describing the transition from solid-like to fluid-like behavior. It has been used to describe both solid-to-solid and liquid-to-solid phase transitions, as well as plasticity and viscoelasticity. In applying this framework to soil liquefaction, the soil is modeled as a mixture of a granular material and a liquid, capable of undergoing large reversible and irreversible deformations.After the framework has been developed to describe soil liquefaction, specific initial-boundary value problems of soil liquefaction will be studied.

0234009， K.R. Rajagopal, Texas a&m University“土壤液化分析的热力框架”这一行动支持了一种模拟地震激发下土壤液化现象的新方法。饱和无黏结土的液化涉及到土壤从固体样向流体样的性状变化。新方法涉及到一个在描述非常多样化的耗散过程中相当成功的一般热力学框架的应用。这种热力学框架特别适合于描述材料的非弹性响应，并且非常适合于描述从类固体到类流体行为的转变。它已经被用来描述固体到固体和液体到固体的相变，以及塑性和粘弹性。在将这一框架应用于土壤液化时，土壤被建模为颗粒材料和液体的混合物，能够经历大的可逆和不可逆变形。在建立了描述土壤液化的框架后，将对土壤液化的具体初始边值问题进行研究。