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CAREER: Beyond the Code - Towards Next Generation Design for Deep Foundations

职业生涯：超越规范 - 迈向下一代深层基础设计

基本信息

批准号：
1752303
负责人：
Anne Lemnitzer
金额：
$ 50万
依托单位：
University of California-Irvine
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1752303&HistoricalAwards=false
关键词：
CAREER Beyond Code Towards Next

项目摘要

This Faculty Early Career Development Program (CAREER) award will create a synthesized, geo-structural, and risk-informed framework for deep foundation engineering analysis and design. Recent events, both domestically and internationally, have highlighted the critical nature of foundation resilience in ensuring continued infrastructure function following natural disasters. The framework to be developed will be capable of providing next-generation resistance formulations for infrastructure foundations capable of reliably and holistically assessing the behavior and response of deep foundations under multiaxial loading. The framework will offer more accurate and parsimonious design solutions which will reduce overdesign, and require less material. It will spur the introduction and implementation of novel instrumentation technologies and sustainable materials. In addition, research findings will accelerate the transition to use of high-performance materials with permanently integrated integrity assessment capabilities by providing a validated design platform to accurately characterize foundation response behavior. This will potentially result in substantial reductions in the cost of building foundations. The CAREER educational objectives focus on stimulating interdisciplinary curiosity and growth through diverse curricular efforts and industry involvement in geo-structural undergraduate and graduate classroom training. It will cater to the increasing demand for technical rigor and a global mindset in engineering graduates. Professional career development activities will supplement the technical educational activities to increase the retention of diversity in geo-structural engineering in academia and industry, and stimulate a lifelong interest in research and development. The latter part of the educational plan will specifically target female engineers, and is aligned with NSF INCLUDES.The core of the CAREER research consists of executing well-coordinated, large-scale experimental- and risk-informed numerical simulations to generate baseline knowledge that aids the development of integrated, performance-based assessment metrics. Specifically, this research will enable the (i) derivation of robust, next-generation loading-response formulations; (ii) development of creative experimental tools to holistically evaluate damage evolution; (iii) validation of models for design and post-hazard integrity analyses, and (iv) risk-driven sensitivity studies to connect all components into a unified decision-making framework. In addition, the experimental studies will fill vital data gaps through prototype-scale testing of soil-pile systems for which limited research has been performed, i.e., specifically targeting piles with complex structural fixity conditions at the pile head and pile tip. Another aspect of the research will develop innovative experimental tools to improve our fundamental understanding of complex three-dimensional (3D) soil-structure interaction (SSI) by extracting volumetric measurements in deep foundation systems via 3D printed, cast in place instrumentation technologies. The research program will benefit the profession by implementing new understanding in software tools usable for individual component and system analysis for a broad spectrum of infrastructure beyond deep foundations.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该教师早期职业发展计划（CAREER）奖将为深基础工程分析和设计创建一个综合的，地质结构和风险知情的框架。最近在国内和国际上发生的事件突出表明，基础复原力对于确保基础设施在自然灾害后继续发挥作用至关重要。待开发的框架将能够为基础设施基础提供下一代阻力公式，能够可靠和全面地评估多轴载荷下深基础的行为和响应。该框架将提供更准确和更简约的设计解决方案，这将减少过度设计，并需要更少的材料。它将刺激新型仪器技术和可持续材料的引入和实施。此外，研究结果将通过提供经过验证的设计平台来准确表征基础响应行为，加速过渡到使用具有永久集成完整性评估能力的高性能材料。这将有可能大大降低建造地基的成本。职业教育目标的重点是通过不同的课程努力和行业参与地质结构本科和研究生课堂培训，激发跨学科的好奇心和成长。它将满足工程毕业生对技术严谨性和全球思维的日益增长的需求。专业职业发展活动将补充技术教育活动，以增加学术界和工业界地质结构工程的多样性，并激发对研究和开发的终身兴趣。教育计划的后半部分将专门针对女性工程师，并与NSF INCLUDES保持一致。CAREER研究的核心包括执行协调良好的、大规模的实验和风险信息数值模拟，以生成基线知识，以帮助开发综合的、基于绩效的评估指标。具体来说，这项研究将实现（i）推导出鲁棒的下一代载荷响应公式;（ii）开发创造性的实验工具来全面评估损伤演变;（iii）验证设计和灾后完整性分析的模型，以及（iv）风险驱动的敏感性研究，将所有组件连接到统一的决策框架中。此外，实验研究将通过土桩系统的原型规模测试填补重要的数据空白，对土桩系统进行了有限的研究，即，特别是针对桩头和桩尖处具有复杂结构固定条件的桩。该研究的另一个方面将开发创新的实验工具，通过3D打印，现场铸造仪器技术提取深基础系统中的体积测量，提高我们对复杂三维（3D）土壤-结构相互作用（SSI）的基本理解。该研究计划将通过实施对软件工具的新理解而使该行业受益，这些软件工具可用于对深层基础之外的广泛基础设施的单个组件和系统分析。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。