Man-made Hazard Mitigation of Reservoir Dams: Monte Carlo Simulation with Multiscale Modeling of Concrete and Accurate Fluid-Structure Interaction

该项目的主要目标是研究有效的计算方法，使大坝的故障和可靠性分析受到人为的危险，如爆炸和渗透。这就需要水库/大坝失效响应的精确建模，而现有的计算工具不能令人满意地处理这一问题。研究方法的进展，从概率建模的混凝土在长度尺度上的主要材料的异质性，制定一个多尺度框架的大型结构的分析。然后通过一种新的流固耦合算法将大坝的计算模拟与水库水的模拟耦合起来。最后，所开发的框架被用来计算与弹丸穿透和空气blasting.The成功完成这项研究将导致一个显着的改进，在大坝破坏分析的计算工具提供给从业人员的故障概率。工程师将能够准确评估现有大坝的失败概率，大坝管理人员将能够利用这些评估来确定投资和资源的优先次序。此外，这项研究将对教育和促进多样性产生重大影响，通过广泛的活动，旨在参与大学预科生，本科生和研究生，特别是那些属于少数民族和代表性不足的群体。这主要是通过在虚拟现实世界的背景下开发一个在线的NSF弹性结构虚拟中心（VCRI）来实现的。第二人生？（SL）。该中心将为外联活动、传播和培训提供前所未有的机会。

The main objective of this project is to study effective computational methods that will allow the failure and reliability analysis of dams subjected to man-made hazards, such as blast and penetration. This requires the accurate modeling of reservoir/dam failure response, which is not handled satisfactorily by available computational tools. The research approach progresses from the probabilistic modeling of concrete at the length scale of the major material heterogeneities to the formulation of a multi-scale framework for the analysis of large structures. The computational simulation of the dam is then coupled with the simulation of the reservoir water through a novel fluid-structure interaction algorithm. Finally, the developed framework is used to compute the probability of failure associated with projectile penetration and air-blasting.The successful completion of this research will lead to a significant improvement in the computational tools for dam failure analysis available to practitioners. Engineers will be able to assess accurately the probability of failure of existing dams and dam administrators will be able to use these assessments to prioritize investments and resources. In addition, the research will have a significant impact on education and promotion of diversity through the wide range of activities aimed at the involvement of pre-college, undergraduate, and graduate students, especially those belonging to minority and underrepresented groups. This is achieved mainly by the development of an online NSF Virtual Center for Resilient Infrastructures (VCRI) in the context of the virtual reality world ?Second Life? (SL). The VCRI will give unprecedented opportunities for outreach activities, dissemination, and training.