Life-cycle Management of Civil Infrastructure Considering Risk and Sustainability

民用基础设施系统在支持社区的经济和社会福利方面发挥着至关重要的作用。然而，在美国，这些系统正在不断老化和恶化，妨碍了它们正常工作的能力。气候变化可能会加剧这一功能问题。为了对结构系统在其生命周期内进行适当的性能评估，不仅要考虑功能，还要考虑经济、社会和环境指标。因此，至关重要的是，应制定方法，量化气候变化对基础设施脆弱性的影响，并在考虑到风险和可持续性的情况下，确定民用基础设施的最佳生命周期管理战略。该项目致力于基础研究，为开发综合风险和可持续性知情决策框架提供必要的知识，以实现民用基础设施系统的最佳生命周期管理。这项研究的结果将有利于美国的经济和社会。本研究涉及多个学科，包括结构可靠度与风险、桥梁工程、全寿命工程、最优化和决策理论。多学科方法将有助于扩大代表性不足的群体对研究的参与。以往关于民用基础设施系统生命周期管理的研究大多侧重于制定方法，以了解气候变化对这些系统性能的影响。此外，在管理日益恶化的基础设施方面，没有明确整合风险和可持续性指标。本研究旨在建立一个基于风险和可持续性的决策框架，能够优化民用基础设施系统的生命周期管理。该框架的产出是基于风险和可持续性的性能概况以及考虑到预算和安全限制冲突的优化生命周期干预战略。所开发的基于风险和可持续性的生命周期管理框架将促进生命周期管理方法在现实世界中的实施。

Civil infrastructure systems play a crucial role in supporting economic and social welfare of communities. However, in the U.S., these systems are under continuous aging and deterioration hindering their ability to properly function. Changing Climate may exacerbate this functionality problem. For the proper performance assessment of structural systems during their life-cycle, it is necessary to take into account not only functionality but also economic, social and environmental indicators. Therefore, formulating methodologies to quantify the effects of changing climate on infrastructure vulnerability and to identify optimal life-cycle management strategies for civil infrastructure considering risk and sustainability is of paramount importance. This project pursues fundamental research to provide needed knowledge for the development of an integrated risk and sustainability informed decision making framework for optimum life-cycle management of civil infrastructure systems. Results from this research will benefit the U.S. economy and society. This research involves several disciplines including structural reliability and risk, bridge engineering, life-cycle engineering, optimization, and decision theory. The multi-disciplinary approach will help broaden participation of underrepresented groups in research. Most of the previous research on life-cycle management of civil infrastructure systems focused on formulating methodologies to enable understanding the effects of changing climate on the performance of these systems. Additionally, no clear integration of risk and sustainability metrics in the management of deteriorating infrastructure has been provided. This research is to create a risk and sustainability based decision making framework capable of optimizing life-cycle management of civil infrastructure systems. The outputs of this framework are the risk and sustainability based performance profiles and the optimized life-cycle intervention strategies taking into account conflicting budgetary and safety constraints. The developed risk and sustainability based life-cycle management framework will facilitate the real-world implementation of life-cycle management methodologies.