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

本研究的重点是先进的滑坡和泥石流的建模，重点是确定静态和动态负载引起的保护结构所产生的这种事件。 这项工作是基于数值技术，利用物质点法（MPM）能够模拟范围广泛的滑坡和泥石流现象，包括固体和类流体流动行为之间的过渡。 这项工作的目的是扩大了解一般有关自然和人为的地貌和结构边界条件，目前在自然景观，公路系统和保护结构的负载效应。 这项研究将通过对滑坡和泥石流引起的载荷的新认识来推进知识和理解。 这些专业研究人员具备开展这项工作的良好资格，在岩土工程、本构建模、数值分析和计算建模等方面具有专业知识，特别是在开发滑坡建模原型方面。拟议的工作是对当前和现有技术和方法的补充，但在概念和范围上与现有工作基本上是正交的。 这项工作已经组织，预算，并与现有的设施和人员，使目标可以在拟议的时间框架内实现。研究将证明一个统一的建模框架的可能性，能够跟踪整个序列的水分引起的滑坡和泥石流事件，从最初的稳定状态，继续通过的发病和大规模流动的表现，并以返回到稳定配置结束，同时允许观察和量化关键工程现象和影响。 这些能力可以极大地影响如何为此类事件设计预防和缓解措施的基础设施。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轻与基础设施保护相关的经济和社会成本，以防止滑坡和泥石流，仅在美国每年就造成数千亿美元的损失;（2）增强岩土工程和相关工程应用的建模能力将有助于扩展工程师，研究人员和学生可用的计算基础设施;（3）专门为教育用途设计的可视化功能和材料将扩大本科生和研究生研究和理解滑坡和泥石流相关现象的范围。 我们还将利用华盛顿大学工程学院工程咨询多样性中心的能力，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.