Landslide and Debris-flow Induced Static and Dynamic Loads on Protective Structures

这项研究的重点是滑坡和泥石流的高级建模，重点是确定此类事件对防护结构造成的静态和动态荷载。这项工作基于数值技术，利用物质点方法(MPM)能够模拟广泛的滑坡和泥石流现象，包括固体和类似流体的流动行为之间的转变。这项工作的目的是扩大对与自然和人为地貌和结构边界条件有关的荷载效应的理解，如在自然景观、公路系统和保护结构中存在的情况。这项研究将对滑坡和泥石流诱发的荷载提供新的认识和理解。在岩土工程、本构模型、数值分析和一般计算模型方面，特别是在开发滑坡模型原型方面，私人投资经理具有很好的资格来开展这项工作。拟议的工作是对现有和现有技术和方法的补充，但它在概念和范围上与现有工作基本上是垂直的。这项工作经过组织、预算，并与现有的设施和人员联系在一起，以便在拟议的时间框架内实现目标。研究将论证建立一个统一的建模框架的可能性，该框架能够跟踪湿气引发的滑坡和泥石流事件的整个序列，从最初的稳定状态开始，一直持续到大规模水流的开始和表现，最后恢复到稳定的状态，同时允许观察和量化关键的工程现象和影响。这类能力可以极大地影响如何在预防和缓解措施方面为此类事件设计基础设施。这项研究将在几个方面产生更广泛的影响：(1)改进的分析能力可以帮助减少与防止滑坡和泥石流的基础设施保护相关的经济和社会成本，仅在美国每年就会造成数千亿美元的损失；(2)增强的岩土工程和相关工程应用的建模能力将有助于扩大工程师、研究人员和学生可用的计算基础设施；(3)专门为教育目的设计的可视化能力和材料将拓宽在本科生和研究生水平上研究和理解滑坡和泥石流相关现象的背景。我们还将利用华盛顿大学工程学院工程咨询与多样性中心的能力，让来自不同背景的本科生参与到这个研究项目中来。

This research focuses on advanced modeling of landslide and debris flows with an emphasis on determining the static and dynamic loads induced on protective structures arising from such events. The work is based on numerical techniques utilizing the material point method (MPM) capable of modeling a broad range of landslide and debris flow phenomena, including transitions between solid and fluid-like flow behaviors. The objective of the work is to extend the understanding of loading effects in general pertaining to natural and man made geomorphological and structural boundary conditions, as present in natural landscapes, highway systems, and protective structures. This research will advance knowledge and understanding by shedding new light on landslide and debris flow-induced loading. The PIs are well-qualified to carry out the work, having demonstrated expertise in the required aspects of geotechnical engineering, constitutive modeling, numerical analysis, and computational modeling in general, and in developing a landslide modeling prototype, in particular. The proposed work is complementary to current and existing techniques and approaches, but it is fundamentally orthogonal to existing work in its conception and scope. The work has been organized, budgeted, and linked to available facilities and personnel such that the objectives can be achieved within the proposed time frame.The research will demonstrate the possibility of a unified modeling framework capable of tracking the entire sequence of moisture-induced landslides and debris flow events, starting from an initial stable state, continuing through to the onset and manifestation of large scale flow, and ending with a return to a stable configuration, all while allowing the observation and quantification of key engineering phenomena and effects. These kinds of capabilities can dramatically impact how infrastructure can be designed for such events in regards to both prevention and mitigation measures. This research will have broader impact on several fronts:(1) improved analysis capabilities can help mitigate the economic and social costs associated with infrastructure protection against landslides and debris-flows, which cause hundreds of billions of dollars of damage annually in the US alone;(2) enhanced modeling capabilities for geotechnical and related engineering applications will help extend the computational infrastructure available to engineers, researchers, and students;(3) visualization capabilities and materials specifically designed for educational use will broaden the contexts in which landslides and debris-flow related phenomena can be studied and understood, both at the undergraduate and graduate level. We also will leverage the capabilities of the Engineering Advising & Diversity Center in the College of Engineering at the University of Washington, to involve undergraduates from diverse backgrounds into this research project.