BRITE Synergy: Enhancing Prediction of Rock Slope Failures During Earthquakes

BRITE Synergy：增强地震期间岩坡破坏的预测

• 批准号: 2135730
• 负责人: Mary MacLaughlin
• 金额: $ 21.28万
• 依托单位: Montana Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2135730&HistoricalAwards=false
• 关键词: BRITE; Synergy; Enhancing; Prediction; Rock

Engineering characterization of geological materials is a critical and challenging endeavor, continuously evolving as new technologies are introduced. Understanding the strength and behavior of rock and soil is necessary for safe and cost-effective designs, with applications ranging from robust infrastructure (roads, buildings, dams, tunnels, etc.) to sustainable development of energy and mineral resources, all of which are essential to society. News coverage of recent failures of natural slopes and tailings dams has raised public awareness and concern across the globe. Although such disasters have significant negative consequences, study of them enables improved understanding, allowing for improved safety in the future. This Boosting Research Ideas for Transformative and Equitable Advances in Engineering (BRITE) Synergy project aims to improve our ability to predict seismically induced rock slope failures so they can be addressed prior to a triggering earthquake event. Laboratory experiments will be combined with numerical simulations to enhance our ability to predict and prevent seismically-induced rock slope failures. In addition to the benefit to society via improved safety during earthquakes, the project supports the professional development and research goals of a female PI and a set of students from groups currently underrepresented in science and engineering. In particular, this project will provide the opportunity for the PI and her students to engage with new techniques and technologies as they perform the experiments and simulations and interpret the results, ranging from acoustic emissions instrumentation to hybrid finite-discrete element numerical models.The research goals will largely be accomplished via experimental work with two related thrusts: development of an improved direct shear test procedure for characterizing the shear strength of rock joint surfaces, and implementation of a suite of shake table tests to investigate the motion of rock blocks under seismic loading conditions. The associated experimental datasets will be archived and shared via the DesignSafe repository. The dataset containing the direct shear test results will allow the global rock mechanics community to more readily adopt the improved test procedure and the dataset containing yield accelerations and block displacements will provide a validation tool that will be of use to earthquake engineering researchers and practitioners worldwide. Numerical models will be used to augment the experimental datasets using continuum, discontinuum, and hybrid methods, allowing exploration of a wider variety of conditions than can be simulated in the laboratory.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地质材料的工程表征是一项关键且具有挑战性的工作，随着新技术的引入而不断发展。了解岩石和土壤的强度和行为对于安全且具有成本效益的设计至关重要，其应用范围从坚固的基础设施（道路、建筑物、水坝、隧道等）到能源和矿产资源的可持续发展，所有这些对社会都至关重要。最近有关天然斜坡和尾矿坝溃坝的新闻报道引起了全球公众的认识和关注。尽管此类灾难会产生严重的负面后果，但对它们的研究可以增进了解，从而提高未来的安全性。这一促进工程变革和公平进步的研究理念 (BRITE) 协同项目旨在提高我们预测地震引起的岩石边坡破坏的能力，以便在触发地震事件之前解决这些问题。实验室实验将与数值模拟相结合，以增强我们预测和防止地震引起的岩质边坡破坏的能力。除了通过提高地震期间的安全性造福社会之外，该项目还支持一名女性 PI 和来自目前在科学和工程领域代表性不足的群体的一组学生的专业发展和研究目标。特别是，该项目将为 PI 和她的学生提供在进行实验和模拟并解释结果时接触新技术和新技术的机会，从声发射仪器到混合有限离散元数值模型。研究目标将主要通过两个相关推力的实验工作来实现：开发一种改进的直接剪切测试程序，用于表征岩石节理表面的剪切强度，以及 实施一套振动台测试，以研究地震荷载条件下岩块的运动。相关的实验数据集将通过 DesignSafe 存储库进行存档和共享。包含直剪测试结果的数据集将使全球岩石力学界更容易采用改进的测试程序，包含屈服加速度和块位移的数据集将为全世界的地震工程研究人员和从业人员提供验证工具。数值模型将用于使用连续体、不连续体和混合方法来增强实验数据集，从而允许探索比实验室模拟更广泛的条件。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。