Fiber Reinforcement for Soils and Stability of Fiber-Reinforced Soil Structures

摘要9820832 PI：Radoslaw L. Michalowski研究所：约翰霍普金斯大学“纤维加固土壤和稳定性的纤维加固土壤结构”土壤加固短夹杂物，如纤维，最近已尝试在岩土工程建设。 这种技术并没有被常规使用，因为没有充分的证据证明其有效性，因为目前缺乏能力来预测纤维增强土壤的性能（特别是强度）。 有人建议，研究更好地理解和定量描述这种复合材料的行为进行。 本研究的目标是：（a）发展更好地了解纤维增强机制，（B）实现合理的（有用的设计）定量描述这种复合材料（模型），（c）收集实验证据的建模工作的验证，和（d）发展合理的分析纤维增强结构。 理论研究的重点将放在微观力学和均匀化上，实验室测试将用于验证开发的模型。 细观力学研究将包括土壤-纤维相互作用和单个纤维对基质变形的响应。 均匀化将包括纤维增强土的宏观行为的描述，作为将单纤维细胞行为扩展到纤维以任意方式分布的复合系统的结果。 这项研究的意义在于发展合理的纤维增强土的描述，以便可以开发出可靠的方法来设计这种复合材料。 提出合理的纤维加筋土结构分析方法将对工程实践产生直接影响。

Abstract 9820832 PI: Radoslaw L. Michalowski Institution: Johns Hopkins University "Fiber Reinforcement for Soils and Stability of Fiber-Reinforced Soil Structures" Soil reinforcement with short inclusions, such as fibers, has been tried recently in geotechnical construction. This technique is not used routinely because of the absence of well-documented evidence of its effectiveness, and because of a current lack of ability to predict the properties (strength in particular) of fiber-reinforced soils. It is proposed that research toward a better understanding and quantitative description of the behavior of such composites be undertaken. The objectives of this research are to: (a) develop better understanding of fiber reinforcement mechanisms, (b) achieve a reasonable (useful in design) quantitative description of such composites (models), (c) collect experimental evidence for validation of the modeling effort, and (d) develop rational analyses of fiber-reinforced structures. The focus in the theoretical investigation will be on the micromechanics and homogenization, and laboratory testing will be used to validate the models developed. Micromechanics investigation will include soil-fiber interaction and response of a single fiber to deformation of the matrix. The homogenization will include description of the macroscopic behavior of the fiber-reinforced soil as a result of extending single-fiber cell behavior to a composite system with fibers distributed in an arbitrary fashion. The significance of this research will be in development of rational description of fiber-reinforced soils so that reliable methods for design with such composites can be developed. Presenting reasonable methods of analysis of fiber-reinforced soil structures is expected to have a direct impact on engineering practice.