PECASE: Micro-Scale Based Reliability Analysis of Mechanical and Flow-Related Behavior of Heterogeneous Materials for Macro-Scale Infrastructure and Geotechnical Applications

PECASE：针对宏观基础设施和岩土应用的异种材料的机械和流动相关行为的基于微尺度的可靠性分析

• 批准号: 9875516
• 负责人: Lori Graham-Brady
• 金额: $ 21万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9875516&HistoricalAwards=false
• 关键词: PECASE; Micro; Scale; Based; Reliability

9875516 Lori L. Graham University of Virginia CAREER: Micro-Scale Based Reliability Analysis of Mechanical and Flow-Related Behavior of Heterogeneous Materials for Macro-Scale Infrastructure and Geotechnical Applications Abstract With the aging of our nation's infrastructure comes safety concerns about existing systems based on geomaterials such as soil and concrete. The full development of proper reliability analyses of such systems will contribute to a rationally prescribed balance of safety and cost in engineering design and maintenance activities. An important part of this reliability analysis is to assess the effects of the randomness that is inherent in soil and concrete. This career development plan describes integrated research and educational activities aimed at improving the behavioral descriptions for these materials, thereby promoting reliability-based design and analysis for civil engineering applications. The research plan consists of five phases that provide a logical and efficient progression from experimentally obtained microstructures to reliability analysis of such critical responses as local stresses in concrete and soils and local groundwater velocity in soils. Use of "moving-window GMC" and stochastic field theory establishes a much-needed link between micro-scale and macro-scale research on these materials. This research has potential to be extended within the fields of geotechnical and concrete engineering, as well as to be applied in other engineering fields (e.g., microelectronics, materials process modeling). The advantages provided by probabilistic analysis and reliability-based design will be further promoted through an education plan to improve the incorporation of probability and statistics into the engineering curriculum, based on the development of probability modules to be applied to a range of civil engineering courses. Further, incorporation into educational activities of the visualization techniques developed in research will enhance presentation of complex course materials. In general, the education plan addresses the development of students (both full-time and in continuing education) who are confident in their abilities to solve complex problems by placing an emphasis on cross-disciplinary preparation.

9875516洛里湖格雷厄姆弗吉尼亚大学职业生涯：微观尺度为基础的可靠性分析的机械和流动相关行为的异质材料的宏观基础设施和岩土工程应用摘要随着我国的基础设施的老化来对现有系统的安全问题的基础上地质材料，如土壤和混凝土。 充分开展此类系统的可靠性分析，将有助于在工程设计和维修活动中合理地规定安全和成本的平衡。 可靠性分析的一个重要部分是评估土壤和混凝土固有的随机性的影响。 该职业发展计划描述了旨在改善这些材料的行为描述的综合研究和教育活动，从而促进土木工程应用的可靠性设计和分析。该研究计划包括五个阶段，提供了一个逻辑和有效的进展，从实验获得的微观结构的可靠性分析等关键反应，如局部应力在混凝土和土壤和当地地下水在土壤中的速度。 使用“移动窗口GMC”和随机场理论建立了一个迫切需要的联系之间的微观尺度和宏观尺度的研究这些材料。 这项研究有可能在岩土工程和混凝土工程领域得到扩展，并应用于其他工程领域（例如，微电子学、材料工艺建模）。概率分析和基于可靠性的设计所提供的优势将通过一项教育计划得到进一步推广，该计划将在开发适用于一系列土木工程课程的概率模块的基础上，更好地将概率和统计纳入工程课程。 此外，纳入教育活动的可视化技术的研究开发将提高复杂的课程材料的介绍。 总的来说，教育计划通过强调跨学科准备，解决对自己解决复杂问题的能力有信心的学生（全日制和继续教育）的发展问题。