CAREER: A Performance-Based Multi-Objective Optimization Framework to Define Innovative Structural Concepts and Support the Seismic Design of Critical Buildings

职业生涯：基于性能的多目标优化框架，用于定义创新结构概念并支持关键建筑的抗震设计

• 批准号: 1351591
• 负责人: Gordon Warn
• 金额: $ 40万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1351591&HistoricalAwards=false
• 关键词: CAREER; Performance; Based; Multi; Objective

The research objective of this Faculty Early Career Development (CAREER) program award is to integrate performance-based design and multi-objective optimization into a single computational framework to support the seismic design of critical buildings. The emphasis is placed on critical buildings, such as acute care hospitals and emergency response centers, because these buildings play a key role in a community's response to an earthquake event and subsequent recovery. Disruption to the functionality of these buildings can have cascading effects resulting in significant societal losses. Although the focus here is on the seismic design of critical buildings, the integrated framework developed will be adaptable to all types of buildings and various natural hazards. Performance-based seismic design (PBSD) provides decision variables for post-event functionality or economic loss. However, the PBSD process is likely to lead to a satisfactory but not necessarily optimal design solution. Furthermore, the heuristic nature of the PBSD process does not provide understanding of the tradeoffs of robustness and cost-effectiveness. This research will pursue an integrated computational framework that simultaneously identifies innovative structural concepts and tradeoffs between conflicting design objectives to support decision-making.The study will develop a computational framework that integrates probabilistic seismic performance assessment methodology and multi-objective algorithms. The integrated framework will be tested and validated in three phases. Each phase involves an increased level of mathematical modeling and computational complexity. In conjunction with the second phase, an improved hospital functionality model will be developed and incorporated into the framework to gain insights about how physical damage affects functionality and to identify innovative seismic protective system concepts that maximize post-event functionality while balancing conflicting design objectives, such as minimizing building cost. Following the third phase, a global variance-based sensitivity analysis will be performed on the integrated performance-based multi-objective optimization framework to understand how uncertainties in model factors propagate through the framework. The integrated educational activities are designed to address the need for understanding how to engineer complex systems at all levels of education. These activities include various techniques to reveal tradeoffs between conflicting objectives and techniques to identify balanced multiple conflicting objectives. The educational activities target groups ranging from K-12 students to K-12 educators to doctoral students and have been designed around engineering problems appropriate for each educational level.

该学院早期职业发展（CAREER）计划奖项的研究目标是将基于性能的设计和多目标优化集成到单个计算框架中，以支持关键建筑物的抗震设计。重点放在关键建筑物上，例如急症护理医院和应急响应中心，因为这些建筑物在社区应对地震事件和随后的恢复中发挥着关键作用。这些建筑物的功能中断可能会产生连锁效应，造成重大社会损失。虽然这里的重点是关键建筑物的抗震设计，但开发的综合框架将适用于所有类型的建筑物和各种自然灾害。基于性能的抗震设计（PBSD）为事后功能或经济损失提供决策变量。然而，PBSD 过程可能会产生令人满意但不一定是最佳的设计解决方案。此外，PBSD 过程的启发式本质并不能提供对鲁棒性和成本效益权衡的理解。这项研究将寻求一个综合计算框架，该框架可同时识别创新的结构概念和相互冲突的设计目标之间的权衡，以支持决策。该研究将开发一个集成概率地震性能评估方法和多目标算法的计算框架。集成框架将分三个阶段进行测试和验证。每个阶段都涉及更高水平的数学建模和计算复杂性。结合第二阶段，将开发改进的医院功能模型并将其纳入框架中，以深入了解物理损坏如何影响功能，并确定创新的地震防护系统概念，最大限度地提高事件后功能，同时平衡相互冲突的设计目标，例如作为最小化建筑成本。第三阶段之后，将在基于性能的集成多目标优化框架上进行基于全局方差的敏感性分析，以了解模型因素中的不确定性如何通过框架传播。综合教育活动旨在满足理解如何在各级教育中设计复杂系统的需求。这些活动包括揭示冲突目标之间权衡的各种技术以及识别平衡的多个冲突目标的技术。教育活动的目标群体涵盖从 K-12 学生、K-12 教育工作者到博士生，并围绕适合每个教育级别的工程问题进行设计。