Browsing by Subject "Civil engineering"
Now showing items 1-20 of 37
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A Mean Field Approach to Watershed Hydrology
(2016)Society-induced changes to the environment are altering the effectiveness of existing management strategies for sustaining natural and agricultural ecosystem productivity. At the watershed scale, natural and agro-ecosystems ... -
A Study in Laterally Restrained Buckled Beams for the use in a Vertical Isolation System
(2021)Linear vibration isolation systems, used to reduce the transmissibility of vertical vibration, requires a vertical static displacement that increases with the square of the natural period of the isolation system. The static ... -
Adaptive Spline-based Finite Element Method with Application to Phase-field Models of Biomembranes
(2015)Interfaces play a dominant role in governing the response of many biological systems and they pose many challenges to traditional finite element. For sharp-interface model, traditional finite element methods necessitate ... -
Analysis of the Stability and Response of Deep-Seated Landslides by Monitoring their Basal Temperature
(2020)Deep-seated landslides are known as large slides involving millions of cubic meters that move as a rigid block on top of a deep (below the roots of the trees and the groundwater level) basal layer of heavily deformed minerals. ... -
Application of Numerical Methods to Study Arrangement and Fracture of Lithium-Ion Microstructure
(2016)The focus of this work is to develop and employ numerical methods that provide characterization of granular microstructures, dynamic fragmentation of brittle materials, and dynamic fracture of three-dimensional bodies.We ... -
Applications of Deep Representation Learning to Natural Language Processing and Satellite Imagery
(2020)Deep representation learning has shown its effectiveness in many tasks such as text classification and image processing. Many researches have been done to directly improve the representation quality. However, how to improve ... -
Aquifer Parametrization and Evaluation of Dipole Flow in Recirculation Wells
(2015)The dipole-flow test is a novel aquifer characterization technique that utilizes a single-borehole measurement system to yield the vertical hydraulic conductivity, horizontal hydraulic conductivity, and storativity within ... -
Characterization and Mechanism of Rigidity in Columns of Star-shaped Granular Particles
(2020)An important challenge in the science of granular materials is to understand the connection between the shapes of individual grains and the macroscopic response of the aggregate. Granular packings of concave or elongated ... -
Chemo-Hygro-Geomechanics of Enhanced Crack Propagation
(2015)This dissertation studies the chemo-hygro-mechanical coupling involved in the process of crack propagation encountered both in natural and engineered context. Chemical processes are likely to affect the mechanical properties ... -
Combined Deterministic-Stochastic Identification with Application to Control of Wave Energy Harvesting Systems
(2012)This thesis proposes an integrated procedure for identifying the nominal models of the deterministic part and the stochastic part of a system, as well as their model error bounds in different uncertainty structures (e.g. ... -
Control of Vibratory Energy Harvesters in the Presence of Nonlinearities and Power-Flow Constraints
(2012)Over the past decade, a significant amount of research activity has been devoted to developing electromechanical systems that can convert ambient mechanical vibrations into usable electric power. Such systems, referred ... -
Correlation of Finite Element Analysis to Impacted Composite Plates
(2011)The purpose of this thesis was to examine progressive composite damage models available within LS-DYNA and to correlate the results of these models with drop weight impact testing and with the non-destructive evaluation ... -
Crack Nucleation and Branching in the eXtended Finite Element Method
(2013)The eXtended Finite Element Method (X-FEM) has proven to be a robust method for simulating crack propagation, but relatively little work has focused on the important problem of crack initiation or nucleation. In this work, ... -
Data Transfer between Meshes for Large Deformation Frictional Contact Problems
(2013)In the finite element simulation of problems with contact there arisesthe need to change the mesh and continue the simulation on a new mesh.This is encountered when the mesh has to be changed because the original mesh experiences ... -
Development of Water and Wastewater Biofiltration Technologies for the Developing World using Locally Available Packing Media: Case Studies in Vietnam and Haiti
(2014)Water and sanitation are two of the world's most urgent current challenges (Elimelech, 2006). With a population racing towards seven billion people, over one sixth of the human population does not have access to adequate ... -
Effects of Earthquake Source Recurrence on the Conditional Seismic Hazard Analysis
(2012)In earthquake engineering, the selection of input ground motions for nonlinear structural dynamic analysis is an important element in performance based structural design. Probabilistic seismic hazard analysis (PSHA) provides ... -
Elucidating Atmospheric Turbulence Across Scales in Numerical Models: Land-Atmosphere Interaction Controls of Moist Processes
(2020)This research aims to understand the development of the atmospheric energy spectrum and energy transfer mechanisms across scales. A clear understanding of energy spectrum development and transfer mechanisms is necessary ... -
Exploring Chemical Enhancement of Subcritical Fractures in Geomaterials
(2013)Propagation of subcritical cracks is studied in a geomaterial subject to weakening by the presence of water, which dissolves a mineral component of it. Such weakening is common when tensile micro-cracks develop, constituting ... -
Finite Element Methods for Interface Problems with Mesh Adaptivity
(2015)This dissertation addresses interface problems simulated with the finite element method (FEM) with mesh adaptivity. More specifically, we concentrate on the strategies that adaptively modify the mesh and the associated data ... -
Flow and Jamming of Granular Materials in a Two-dimensional Hopper
(2012)Flow in a hopper is both a fertile testing ground for understanding fundamental granular flow rheology and industrially highly relevant. Despite increasing research efforts in this area, a comprehensive physical theory is ...
