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Modeling Landslide Induced Flow Interactions With Structures Using The Material Point Method
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Book Synopsis Modeling Landslide-induced Flow Interactions with Structures Using the Material Point Method by : Carter M. Mast
Download or read book Modeling Landslide-induced Flow Interactions with Structures Using the Material Point Method written by Carter M. Mast and published by . This book was released on 2013 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landslides cause significant damage and loss of life around the world each year. To help protect people, infrastructure, and lifelines against such disasters, it is critical to: a.) control the path and/or redirect flow when potential interaction with the built environment exists, and b.) have engineered structures that are capable of resisting the loads imparted by a landslide. Capturing the mechanical behavior and structural interaction is challenging---as these flow events are highly dynamic, unpredictable, and inherently complex in nature. This dissertation presents the Material Point Method (MPM) as a continuum-based tool for modeling landslides and other flow-like events, with an emphasis on capturing the force interaction between the flow and rigid structures. Key challenges arising in this context are the ability to: a.)~model the transition between solid and fluid-like behavior within a single numerical environment, b.)~develop constitutive frameworks that can accommodate extremely large deformations while remaining computationally efficient and numerically stable, and c.) account for the different phases and constituents that comprise these events This research addresses these challenges and includes an anti-locking enhancement designed to improve kinematics and the quality of the stress field, a volume constraint for multiphase simulations, and an evaluation of different elasto-plastic material models suitable for large deformation analyses of granular materials. The current implementation is used to model several examples from both the solid and fluid mechanics regime, including incompressible fluid flow, the response of an elastic cantilever beam, three fully saturated porous media analyses, a ductile hyper-velocity Taylor bar impact, a parametric investigation of planar granular flow, snow avalanche simulation, and three landslide applications evaluating the nature of the force interaction with structures.
Book Synopsis The Behavior of a Granular Flow from Collapsing, to Spreading and Sliding Down a Frictional Incline by : Bahman Sheikh
Download or read book The Behavior of a Granular Flow from Collapsing, to Spreading and Sliding Down a Frictional Incline written by Bahman Sheikh and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT Rapid flow-like landslides occur commonly in different parts of the world and present a serious threat to communities and infrastructures, especially in mountainous areas. Due to their high flow velocities, large impact forces, long-runout distance, and poor temporal predictability, flow-like landslides are among the major geohazards. Human safety and infrastructures can be endangered by large impact forces in unexpected flow-like landslide events. Hence, reliable estimates of the runout of flow-like landslides and their resultant impact force on structures are essential for both hazard assessment and the design of protective measures. However, it's challenging to capture, analyze and interpret the behavior of flow-like landslides as real full-scale observations and experiments are often difficult or impossible to conduct because of dangers involved with in-situ field experimental studies, uncontrollable geophysical conditions, and unpredictable time and locations of landslide events. Alternatively, scaled experimental studies of rapid debris flows can provide fundamental and valuable insights to better understand the underlying physics of landslides or to develop and validate a robust computational framework for landslide modeling. Although the scaled laboratory and field experiments of debris flow are useful, they cannot be directly utilized for landslide prediction and designs. Hence, a numerical model capable of simulating the debris flow and its interaction with structures, and reliably estimating the debris flow impact force would be an ultimate alternative for landslide designs. Numerical modeling of debris flow, however, is exceptionally complex since debris flow is known to exhibit both solid-like and fluid-like behaviors from grain inertia to micro viscous material which are responsible for the complex flow dynamics of debris flow. Therefore, numerical models capable of simulating the debris flow are naturally complex. Currently, most of the numerical methods proposed for modeling flow-like landslides or debris flows are developed by means of simplified relationships which are based on the assumption that the granular material is to behave like an incompressible fluid. These single-phase equivalent fluid models rely on manipulation of the rheological properties of landslide mass and, hence, have limited predictive power, and are mainly useful for modeling landslides runout, propagation and spreading which are mostly related to the fluid-like behavior of the granular flow. Solid-like behaviors of a sliding mass, however, can be inferred from its impact forces on a rigid obstruction. Therefore, a physically-based numerical model is required which is capable of taking into account the non-linear behavior of the granular material considering both fluid-like and solid-like behaviors, suitable for modeling of large displacement and deformation of the granular mass and taking into account frictional soil-structure interactions. Such numerical models need to be validated through systematic experimental studies at the well-controlled laboratory scale. In this research, the behavior of a granular sliding mass down an incline from collapsing, to sliding, and to impacting a rigid obstruction was investigated. The main objectives of this research are: (1) to develop and validate a computational framework capable of addressing the following four main challenges in landslide modeling and granular flow namely: (A) suitable for modeling of the large deformation of the granular material, (B) capable of considering the frictional soil-structure interaction, (C) equipped with suitable constitutive models to capture the complex behavior of a granular sliding mass in a rapid fluid-like landslide, and (D) computationally efficient to be practical for medium to large-scale granular modeling; (2) to study the governing mechanisms of granular collapse on a frictional surface; and (3) to study the governing mechanisms of granular flow and investigate the transition between solid-like and fluid-like behavior in a granular flow and its impact force. These research objectives are achieved by developing an efficient parallel numerical model based on the Smoothed Particles Hydrodynamics (SPH) method. Two frictional boundary conditions in the framework of SPH method were developed in this study and implemented into the SPH computational tool and their performance was examined in collisional and sliding problems. An elasto-plastic model, a critical hypo-plastic model and a collisional Bagnold-type rheology constitutive model were implemented in the SPH computational tool to investigate the granular flow impact force and mass front velocity. Results of this study revealed that the granular flow is governed by a combination of sliding, collapsing, and spreading mechanisms, depending on the inclination angle, sliding distance, basal friction, and the material initial condition. It is shown that the elasto-plastic models can predict the granular behavior and impact force relatively well in sliding-dominant flows only. The critical hypo-plastic model can consider the effect of dispersive pressure and shearing on the material stiffness and energy dissipation, it shows better predictions of the impact forces compared to the elasto-plastic model, especially in spreading-dominant flows. It is observed that the unified critical hypo-plastic and collisional Bagnold-type model predicted more accurate results of the impact force than the critical hypo-plastic model did, as the unified model accounts for both fluid-like and solid-like behaviors within a sliding granular mass.
Book Synopsis Progress in Landslide Research and Technology, Volume 2 Issue 1, 2023 by : Irasema Alcántara-Ayala
Download or read book Progress in Landslide Research and Technology, Volume 2 Issue 1, 2023 written by Irasema Alcántara-Ayala and published by Springer Nature. This book was released on 2023-12-24 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book provides an overview of the progress in landslide research and technology and is part of a book series of the International Consortium on Landslides (ICL). The book provides a common platform for the publication of recent progress in landslide research and technology for practical applications and the benefit for the society contributing to the Kyoto Landslide Commitment 2020, which is expected to continue up to 2030 and even beyond to globally promote the understanding and reduction of landslide disaster risk, as well as to address the 2030 Agenda Sustainable Development Goals.
Book Synopsis Advanced Tunneling Techniques and Information Modeling of Underground Infrastructure by : J. James Yang
Download or read book Advanced Tunneling Techniques and Information Modeling of Underground Infrastructure written by J. James Yang and published by Springer Nature. This book was released on 2021-07-10 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a compilation of studies regarding novel technology of underground space development, behavior analysis and modelling of soils and underground infrastructure from the 6th GeoChina International Conference held in Nanchang, China from July 19 to 21, 2021. The scope of the studies covers both methodological and pragmatic solutions to critical issues, including soil arching and invert heaving, penetration resistance of mono-bucket foundations in silty soil, inception of debris avalanches, and novel infrastructure survey methods based on point cloud and image analysis. It is anticipated that this updated knowledge will lead to more resilient design, expedited inspection, timely maintenance and rehabilitation of underground infrastructure, and will be beneficial to both researchers and practitioners in the field.
Book Synopsis Progress in Landslide Research and Technology, Volume 3 Issue 1, 2024 by : Biljana Abolmasov
Download or read book Progress in Landslide Research and Technology, Volume 3 Issue 1, 2024 written by Biljana Abolmasov and published by Springer Nature. This book was released on with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Material Point Method for Geotechnical Engineering by : James Fern
Download or read book The Material Point Method for Geotechnical Engineering written by James Fern and published by CRC Press. This book was released on 2019-01-30 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical guide provides the best introduction to large deformation material point method (MPM) simulations for geotechnical engineering. It provides the basic theory, discusses the different numerical features used in large deformation simulations, and presents a number of applications -- providing references, examples and guidance when using MPM for practical applications. MPM covers problems in static and dynamic situations within a common framework. It also opens new frontiers in geotechnical modelling and numerical analysis. It represents a powerful tool for exploring large deformation behaviours of soils, structures and fluids, and their interactions, such as internal and external erosion, and post-liquefaction analysis; for instance the post-failure liquid-like behaviours of landslides, penetration problems such as CPT and pile installation, and scouring problems related to underwater pipelines. In the recent years, MPM has developed enough for its practical use in industry, apart from the increasing interest in the academic world.
Book Synopsis Mechanisms and Early Warning Strategies of Geotechnical Disasters by : Bisheng Wu
Download or read book Mechanisms and Early Warning Strategies of Geotechnical Disasters written by Bisheng Wu and published by Frontiers Media SA. This book was released on 2024-01-29 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the beginning of the 21st century, global environmental problems have become increasingly prominent, and extreme weather events have become more frequent. The irrational development and excessive construction of underground space have also led to various disasters, such as landslides, collapses, debris flows, and ground collapses. According to the data released in the National Geological Disaster Bulletin, 133899 geological disasters have occurred in China from 2009 to 2019, of which landslides accounted for 71%, collapses for 19%, and debris flows for 8%, and ground collapses for 2%. The number of casualties and economic losses caused by rock and soil disasters are the greatest in the world. Therefore, a good understanding of disaster-causing mechanisms of rock and soil has a strong theoretical and practical significance for the safe construction of diversified geotechnical projects.
Book Synopsis Modeling Gravity Hazards from Rockfalls to Landslides by : Vincent Richefeu
Download or read book Modeling Gravity Hazards from Rockfalls to Landslides written by Vincent Richefeu and published by Elsevier. This book was released on 2016-10-11 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravity hazards are a major concern to those living in mountainous areas. To protect infrastructure and human life in these areas, engineers require numerical tools for trajectory analysis, for application from fragmental rockfalls to large-scale avalanches or landslides.This book explores state-of-the-art methods to model the propagation (flows and stops) of masses, using the discrete element method (DEM) to study the evolution of kinetics during an event. Taking into account the shape of the blocks and the topology of the terrain provides an explicit and sophisticated consideration of geometries, eliminating the need for stochastic inputs to rockfall simulations. This method is validated experimentally, before the authors apply it to real case studies. The book ends with an introduction to and comparison with the material point method (MPM), a new and promising approach able to bridge the gap between cases dominated by discreteness and those involving a very large number of elements.Engineering consulting firms, researchers and students should find the approaches outlined in this book useful, whether designing prevention and protection systems for gravity hazards, or exploring new ways to model gravity hazards. - Covers conventional methods used to study gravitational phenomena using empirical parameters - Presents a new numerical tool taking account of the physical phenomenon (friction, dissipation, realistic block shapes) and a methodology for parameter calibration and the achievement of numerical simulations - Applies the numerical model to real cases with a critical analysis of its applicability in the field of engineering - Emphasizes the discrete element method (DEM)
Book Synopsis Multiscale and Multiphysics Processes in Geomechanics by : Ronaldo I. Borja
Download or read book Multiscale and Multiphysics Processes in Geomechanics written by Ronaldo I. Borja and published by Springer Science & Business Media. This book was released on 2011-05-10 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art book contains all results and papers of the International Workshop on Multiscale and Multiphysics Processes in Geomechanics at Stanford University Campus, June 23–25, 2010.
Book Synopsis Numerical Simulation of Landslides and Debris Flows Using an Enhanced Material Point Method by : Woo Kuen Shin
Download or read book Numerical Simulation of Landslides and Debris Flows Using an Enhanced Material Point Method written by Woo Kuen Shin and published by . This book was released on 2009 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods and advances in marine geology and hydrodynamics environment by : Nan Wu
Download or read book Methods and advances in marine geology and hydrodynamics environment written by Nan Wu and published by Frontiers Media SA. This book was released on 2024-01-29 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Academies of Sciences, Engineering, and Medicine Publisher : ISBN 13 :9780309440271 Total Pages :350 pages Book Rating :4.4/5 (42 download)
Book Synopsis State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences by : National Academies of Sciences, Engineering, and Medicine
Download or read book State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences written by National Academies of Sciences, Engineering, and Medicine and published by . This book was released on 2019-01-30 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquake-induced soil liquefaction (liquefaction) is a leading cause of earthquake damage worldwide. Liquefaction is often described in the literature as the phenomena of seismic generation of excess porewater pressures and consequent softening of granular soils. Many regions in the United States have been witness to liquefaction and its consequences, not just those in the west that people associate with earthquake hazards. Past damage and destruction caused by liquefaction underline the importance of accurate assessments of where liquefaction is likely and of what the consequences of liquefaction may be. Such assessments are needed to protect life and safety and to mitigate economic, environmental, and societal impacts of liquefaction in a cost-effective manner. Assessment methods exist, but methods to assess the potential for liquefaction triggering are more mature than are those to predict liquefaction consequences, and the earthquake engineering community wrestles with the differences among the various assessment methods for both liquefaction triggering and consequences. State of the Art and Practice in the Assessment of Earthquake-Induced Soil Liquefaction and Its Consequences evaluates these various methods, focusing on those developed within the past 20 years, and recommends strategies to minimize uncertainties in the short term and to develop improved methods to assess liquefaction and its consequences in the long term. This report represents a first attempt within the geotechnical earthquake engineering community to consider, in such a manner, the various methods to assess liquefaction consequences.
Book Synopsis Analytical Methods in Petroleum Upstream Applications by : Cesar Ovalles
Download or read book Analytical Methods in Petroleum Upstream Applications written by Cesar Ovalles and published by CRC Press. This book was released on 2015-04-02 with total page 1351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effective measurement of the composition and properties of petroleum is essential for its exploration, production, and refining; however, new technologies and methodologies are not adequately documented in much of the current literature. Analytical Methods in Petroleum Upstream Applications explores advances in the analytical methods and instrumentation that allow more accurate determination of the components, classes of compounds, properties, and features of petroleum and its fractions. Recognized experts explore a host of topics, including: A petroleum molecular composition continuity model as a context for other analytical measurements A modern modular sampling system for use in the lab or the process area to collect and control samples for subsequent analysis The importance of oil-in-water measurements and monitoring The chemical and physical properties of heavy oils, their fractions, and products from their upgrading Analytical measurements using gas chromatography and nuclear magnetic resonance (NMR) applications Asphaltene and heavy ends analysis Chemometrics and modeling approaches for understanding petroleum composition and properties to improve upstream, midstream, and downstream operations Due to the renaissance of gas and oil production in North America, interest has grown in analytical methods for a wide range of applications. The understanding provided in this text is designed to help chemists, geologists, and chemical and petroleum engineers make more accurate estimates of the crude value to specific refinery configurations, providing insight into optimum development and extraction schemes.
Book Synopsis Landslides and Engineered Slopes. Experience, Theory and Practice by : Stefano Aversa
Download or read book Landslides and Engineered Slopes. Experience, Theory and Practice written by Stefano Aversa and published by CRC Press. This book was released on 2018-04-17 with total page 2160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landslides and Engineered Slopes. Experience, Theory and Practice contains the invited lectures and all papers presented at the 12th International Symposium on Landslides, (Naples, Italy, 12-19 June 2016). The book aims to emphasize the relationship between landslides and other natural hazards. Hence, three of the main sessions focus on Volcanic-induced landslides, Earthquake-induced landslides and Weather-induced landslides respectively, while the fourth main session deals with Human-induced landslides. Some papers presented in a special session devoted to "Subareal and submarine landslide processes and hazard” and in a “Young Session” complete the books. Landslides and Engineered Slopes. Experience, Theory and Practice underlines the importance of the classic approach of modern science, which moves from experience to theory, as the basic instrument to study landslides. Experience is the key to understand the natural phenomena focusing on all the factors that play a major role. Theory is the instrument to manage the data provided by experience following a mathematical approach; this allows not only to clarify the nature and the deep causes of phenomena but mostly, to predict future and, if required, manage similar events. Practical benefits from the results of theory to protect people and man-made works. Landslides and Engineered Slopes. Experience, Theory and Practice is useful to scientists and practitioners working in the areas of rock and soil mechanics, geotechnical engineering, engineering geology and geology.
Book Synopsis MPM modelling of landslides in brittle and unsaturated soils by : Alba Yerro Colom
Download or read book MPM modelling of landslides in brittle and unsaturated soils written by Alba Yerro Colom and published by . This book was released on 2017 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landslides and slope instabilities represent one of the most important problems in geotechnics causing significant damages around the world every year. Understanding the mechanics of the whole process is of particular importance for risk assessment. First, it is important to determine what areas may be susceptible to landsliding. In addition, it is essential to estimate the travelled distance and the velocity of the unstable mass in order to prevent severe damage. The need to develop solution schemes capable of simulating failure initiation as well as post-failure dynamics is also required in most geotechnical analyses. For instance the design of dams, tunnels, pipes, foundations or embankments. The prediction of such catastrophic episodes presents several challenges due to the complexities of real soil behaviour. In addition, the consideration of the coupled behaviour of soil and pore fluids is essential by means coupled hydromechanical formulations. Traditional geotechnical analysis, such as Limit Equilibrium Methods (LEM), and the well-known standard lagrangian Finite Element Methods (FEM) are very useful to study the failure initiation, but they provide limited information on the post-failure behaviour. In order to overcome such difficulties, modern numerical approaches are being developed. This is the case of the Material Point Method (MPM), which offers an interesting alternative. MPM discretises the media into a set of lagrangian material points which move attached to the material carrying the soil properties. Governing equations are solved incrementally at the nodes of a computational grid that remains fixed through the calculation. This dual description of the media prevents mesh distortion problems. This Thesis focusses on studying brittle failures and slope instabilities, from static conditions to run-out. Relevant aspects for the interpretation of landslides are described: the development of progressive failure mechanism, the role played by internal shearing in compound slides, and the effect of brittleness on the onset of failure and run-out. Different slope instabilities are presented. First, the Selborne slope experiment is simulated. This case, well identified with laboratory data, has been an opportunity to perform a validation of the MPM formulation. A simplified geometry of the Vajont landslide is also analysed in a second modelling. It has shown that a kinematically admissible failure mechanism requires internal shearing of the mobilised mass controlled by the geometry of the basal sliding surface. In addition, by means of a parametric study varying peak and residual strength, run-out is found to be directly related with brittleness index. Finally, a step forward in the application of MPM to multi-phase problems in porous media has been achieved. In order to simulate the behaviour of unsaturated materials, MPM has been extended by means a coupled 3-phase 1-point MPM formulation. In this way, the interaction of three different phases (solid liquid and gas) is taken into account within each material point. This approach is validated by means the modelling of an infiltration problem. Finally, an embankment slope instability induced by heavy rain has been simulated. Two constitutive models are used in the applications: a brittle model with strain softening for saturated soils, and a Mohr-Coulomb elastoplastic model formulated in terms of net stress and suction.
Book Synopsis Understanding and Reducing Landslide Disaster Risk by : Binod Tiwari
Download or read book Understanding and Reducing Landslide Disaster Risk written by Binod Tiwari and published by Springer Nature. This book was released on 2020-12-22 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a part of ICL new book series “ICL Contribution to Landslide Disaster Risk Reduction” founded in 2019. Peer-reviewed papers submitted to the Fifth World Landslide Forum were published in six volumes of this book series. This book contains the followings: • Five keynote lectures • Recent development in physical modeling of landslides • Recent development in numerical modeling of landslides • Recent development in soil and rock testing techniques, application and analysis methods • Recent advancements in the methods of slope stability and deformation analyses • Recent development in disaster risk assessment Prof. Binod Tiwari is a Vice President of the International Consortium on Landslides (ICL). He is the Associate Vice President for research and sponsored project and Professor of civil and environmental engineering at the California State University, Fullerton, California, USA. Prof. Kyoji Sassa is the Founding President and the Secretary-General of the International Consortium on Landslides (ICL). He has been the Editor-in-Chief of International Journal Landslides since its foundation in 2004. Prof. Peter Bobrowsky is the President of the International Consortium on Landslides. He is a Senior Scientist of Geological Survey of Canada, Ottawa, Canada. Prof. Kaoru Takara is the Executive Director of the International Consortium on Landslides. He is a Professor and Dean of Graduate School of Advanced Integrated Studies (GSAIS) in Human Survivability (Shishu-Kan), Kyoto University.
Book Synopsis Fluid-Structure Interaction by : Hans-Joachim Bungartz
Download or read book Fluid-Structure Interaction written by Hans-Joachim Bungartz and published by Springer Science & Business Media. This book was released on 2007-06-24 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume in the series Lecture Notes in Computational Science and Engineering presents a collection of papers presented at the International Workshop on FSI, held in October 2005 in Hohenwart and organized by DFG's Research Unit 493 "FSI: Modeling, Simulation, and Optimization". The papers address partitioned and monolithic coupling approaches, methodical issues and applications, and discuss FSI from the mathematical, informatics, and engineering points of view.
