New Design Criteria for Soil-Construction Material Interface Systems

土壤-建筑材料界面系统的新设计标准

• 批准号: 0200949
• 负责人: Joseph Dove
• 金额: $ 21万
• 依托单位: Virginia Polytechnic Institute and State University
• 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 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0200949&HistoricalAwards=false
• 关键词: New; Design; Criteria; Soil; Construction

CMS-0201482PI: Joseph DoveInstitution: Virginia Polytechnic and State UniversityTitle: "New Design Criteria for Soil and Construction Material Interface Systems" AbstractCentral to many facets of geotechnical engineering design is the problem of determining how local interactions between soil materials and manufactured inclusions dictate overall behavior of a geotechnical composite system. Whether the inclusion is geosynthetic, steel, concrete, or a new material yet to be developed, the interactions between soil and construction materials are governed by underlying physical principles related to measurable properties. Unfortunately, there are few, if any, predictive relationships for interface systems available to the research and practice communities. This deficiency is important because innovative applications are arising which require close control over interface resistance. The goals of this project are to: 1) Formulate new practical design methods and tools for interface systems; 2) Quantify the micro-mechanical behavior of soil-construction material interfaces in two- and three-dimensions; and 3) Determine the spatial scales that control behavior of interfaces for a given soil material and inclusion geometry. Results from previous NSF-sponsored research, a laboratory testing program, and two and three-dimensional discrete element micromechanical models will be used to accomplish these goals. Specific issues to be addressed in the experiments and modeling include the role of grain shape; surface topography; relative hardness; particle movements with respect to the surface asperities; particle breakage; and, solid surface wear on the strength and dilatancy of the soil within the interface shear zone.Broader impacts of this research will be realized in five primary impact areas: integration of education and research; participation of minorities and women; enhancing infrastructure for research; rapid and broad dissemination of research results; and, societal benefits. Education and research will be integrated by bringing research results and new materials into undergraduate and graduate courses. The PIs will continue their long-standing practice of involving undergraduate students in research through the REU program. Participation of underrepresented minorities and women is encouraged. The Ph.D. student involved in this project will serve as a model for her fellow women graduate and undergraduate student colleauges. McNair Scholars, especially those from the Appalachian region, will be actively recruited to conduct their summer internship on this project, and as graduate students. The three-dimensional models and algorithms produced will enhance the research and teaching infrastructure by providing advanced computing resources for solving problems in soil/structure interaction. In addition, project findings will be widely disseminated in print and web-based media. A surface profile database will be created in downloable format on the world wide web. Finally, society at large will benefit from cost saving opportunities and technological advancement.

CMS-0201482 PI：Joseph Dove机构：弗吉尼亚理工大学和州立大学标题：“土壤和建筑材料界面系统的新设计标准”摘要岩土工程设计的许多方面的核心是确定土壤材料和制造的夹杂物之间的局部相互作用如何决定岩土复合系统的整体行为的问题。 无论内含物是土工合成材料、钢材、混凝土还是尚未开发的新材料，土壤和建筑材料之间的相互作用都受到与可测量属性相关的基本物理原理的控制。 不幸的是，有几个，如果有的话，预测关系的接口系统提供给研究和实践界。 这一缺陷是重要的，因为创新的应用正在出现，需要密切控制界面电阻。 该项目的目标是：1）制定新的实用设计方法和工具的界面系统; 2）量化的微观力学行为的土壤建筑材料界面的二维和三维;和3）确定的空间尺度，控制界面的行为为一个给定的土壤材料和夹杂物的几何形状。从以前的NSF赞助的研究，实验室测试程序，和二维和三维离散元微力学模型的结果将用于实现这些目标。 在实验和模拟中要解决的具体问题包括颗粒形状的作用;表面形貌;相对硬度;颗粒相对于表面粗糙体的运动;颗粒破碎;以及固体表面磨损对界面剪切带内土壤强度和粘性的影响。少数群体和妇女的参与;加强研究基础设施;迅速和广泛传播研究成果;以及社会效益。 教育和研究将通过将研究成果和新材料纳入本科和研究生课程来整合。 PI将继续通过REU计划让本科生参与研究的长期做法。 代表性不足的少数民族和妇女的参与受到鼓励。的博士参与这个项目学生将成为她的女研究生和本科生同事的榜样。 麦克奈尔学者，特别是来自阿巴拉契亚地区的学者，将被积极招募来进行这个项目的暑期实习，并作为研究生。 所产生的三维模型和算法将通过为解决土壤/结构相互作用问题提供先进的计算资源来加强研究和教学基础设施。 此外，将通过印刷媒体和网络媒体广泛传播项目结果。 将在万维网上以可下载的格式建立一个表面轮廓数据库。 最后，整个社会将受益于节省成本的机会和技术进步。