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Filtering by: Conference section Thresholds/Monitoring/Sampling Remove constraint Conference section: Thresholds/Monitoring/Sampling Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Behavioral thresholds in mixtures of sand and clay

    Creator:
    Simpson, Daniel Corder
    Abstract:
    Nearly all soils are comprised of mixtures of coarse and fine particles. Behavior under mechanical and thermal loading of soil is strongly influenced (and in some cases, governed) by the ratio of coarse to fine particles. A better understanding of the fundamental behavior of soil mixtures will provide insight to...
    Resource Type:
    Masters Thesis
    Full Text:
    mixtures to verify identified threshold fines contents and used to unify observed thresholds. 3

  • A Methodological Approach for Structural Health Monitoring of Mass-Timber Buildings Under Construction

    Creator:
    Baas, Esther J.
    Abstract:
    As mass-timber building construction rises around the globe, there exists the need to verify the long-term, in-situ behavior and performance of these structural systems. Structural health monitoring (SHM), generally defined as a damage detection strategy consisting of a network of sensors, a data acquisition system, and algorithms for data analysis,...
    Resource Type:
    Masters Thesis
    Full Text:
    associated with sampling criteria for timber monitoring, how to clean and analyze data, and how to account

  • Influence of Concrete and Construction Parameters on Chloride Test Measurements and Critical Chloride Threshold Limits

    Creator:
    Vaddey, Naga Pavan
    Abstract:
    The issue of chloride-induced corrosion of reinforcing steel in concrete and its economic impacts are well-known. Chlorides that cause reinforcement corrosion can be from constituent materials used to prepare concrete or can enter the hardened concrete when the structure is exposed to chloride environments. To minimize the risk of reinforcement...
    Resource Type:
    Dissertation
    Full Text:
    Parameters on Chloride Test Measurements and Critical Chloride Threshold Limits Abstract approved

  • Quantification of landslide movement in a forested environment

    Creator:
    Conner, Jeremy C.
    Abstract:
    Landslides are an insidious natural hazard, which can result in significant damage to public infrastructure. Limited monitoring tools are available, particularly tools suitable for use in forested environments. These tools often only allow a few locations across the slide to be monitored. Terrestrial Laser Scanning (TLS) shows promise as a...
    Resource Type:
    Masters Thesis

  • Monitoring and Prediction of Severe Weather Phenomena through GNSS Meteorology

    Creator:
    Tahami, Hoda
    Abstract:
    While primary use of Global Navigation Satellite System (GNSS) is positioning, navigation, and timing (PNT), various GNSS applications have emerged over the past decades that includes GNSS meteorology. GNSS meteorology is the remote sensing of the atmospheric constituents in the neutral atmosphere – mostly in the troposphere - using GNSS...
    Resource Type:
    Dissertation
    Full Text:
    : Monitoring and Prediction of Severe Weather Phenomena through GNSS Meteorology Abstract approved

  • Automated Monitoring of Construction Operations for Data-Driven Decision Making

    Creator:
    Rashid, Khandakar, M.
    Abstract:
    The continuous improvement of construction operations requires a systematic approach of monitoring and making appropriate control actions. However, the lack of real-time information hinders this workflow and eventually compromises timely and effective decision-making. Project managers spend a great deal of time and effort to solve problems emerging from lack of...
    Resource Type:
    Dissertation
    Full Text:
    . Title: Automated Monitoring of Construction Operations for Data-Driven Decision Making

  • Automated Monitoring of Modular Construction Factories using Computer Vision

    Creator:
    Panahi, Roshan
    Abstract:
    Modular construction is increasingly seen as an efficient construction method in terms of time, cost, and energy. The full realization of these advantages partly relies on the efficiency of the production process inside the modular factories, which currently rely on tedious manual monitoring methods or expensive automated techniques. As a...
    Resource Type:
    Dissertation
    Full Text:
    methods have emerged as an alternative to manual monitoring methods such as field rating, work sampling

  • Bridge Damage State Detection Based on Strain-Based Wireless Structural Health Monitoring

    Creator:
    Slaven, Kelli R.
    Abstract:
    The Pacific Northwest is at risk for significant seismic and tsunami events, which are capable of severely damaging lifeline transportation infrastructure, particularly bridges. As the bridges in the United States age and begin to show signs of fatigue, the risk for severe damage increases. Proper monitoring and inspection of bridges...
    Resource Type:
    Masters Thesis
    Full Text:
    State Detection Based on Strain-Based Wireless Structural Health Monitoring Abstract approved

  • Remote and Ground-based Methods for Monitoring Vegetation Health Parameters in a Bioretention Facility

    Creator:
    Prettyman, Kery M.
    Abstract:
    The growing contamination of surface water by stormwater runoff parallels increasing urban development. Heavy metals, polycyclic aromatic hydrocarbons (PAHs), persistent organic pollutants (POPs), and contaminants of emerging concern (CECs) are discharged from point sources and washed from impervious surfaces into surface waters, impacting the ecology of these systems, food supplies,...
    Resource Type:
    Masters Thesis
    Full Text:
    : Remote and Ground-based Methods for Monitoring Vegetation Health Parameters in a Bioretention Facility

  • Preliminary deployment and evaluation of geophone sensors for monitoring wave activity: GeoMoteShield

    Creator:
    Lathrop, Eve
    Abstract:
    This study focuses specifically on the investigation of a new, inexpensive geophone system and its application to monitor wave activity. Studies of seismic observations of coastal cliffs suggest that ground motions generated from local ocean waves may provide a surrogate to limited wave buoy data to quantify the wave contact...
    Resource Type:
    Honors College Thesis
    Full Text:
    for monitoring wave activity: GeoMoteShield by Eve Lathrop A THESIS

  • Progress Monitoring and Quality Assessment/Quality Control of Construction Projects Using Lidar and BIM

    Creator:
    Puri, Nisha
    Abstract:
    The construction industry is a key contributor to the Gross Domestic Product (GDP) of many countries around the world and is valued at more than $10 trillion globally. Schedule, cost and quality are the main performance measures of construction projects. The primary goal for project stakeholders in the construction industry...
    Resource Type:
    Dissertation
    Full Text:
    : Progress Monitoring and Quality Assessment/Quality Control of Construction Projects using Lidar and BIM

  • Multi-Scale Dynamic Monitoring and Behavior of Cross-Laminated Timber Elements and Systems

    Creator:
    Mugabo, Ignace
    Abstract:
    Cross-Laminated Timber (CLT) is one of the latest engineered wood products to show promising structural features for a variety of structural purposes including resisting lateral loads. For CLT to be widely adopted, its modal behavior needs to be fully evaluated through experimental and numerical methods. It is important to the...
    Resource Type:
    Dissertation
    Full Text:
    presented on July 25, 2019. Title: Multi-Scale Dynamic Monitoring and Behavior of Cross-Laminated Timber

  • Use of Virtual Visual Sensors in the Determination of Natural Frequencies of Timber Structures for Structural Health Monitoring

    Creator:
    Walker, Kristopher
    Abstract:
    Many nondestructive techniques for structural health monitoring are subjective and based on visual observations of degradation. In addition, dynamic properties of structures are already used to obtain quantitative structural health data. However, most current data collection is limited to localized damage on the structure, rather than global response. Recent research...
    Resource Type:
    Masters Thesis
    Full Text:
    Natural Frequencies of Timber Structures for Structural Health Monitoring AN ABSTRACT OF THE THESIS OF

  • Small Unmanned Aircraft Systems (UAS) for Engineering Inspections and Geospatial Mapping

    Creator:
    Javadnejad, Farid
    Abstract:
    Small unmanned aircraft systems (UAS) carrying consumer-grade nonmetric cameras are increasingly utilized to generate high-resolution 3D geospatial data. Low cost, ease of operation, widespread availability and low altitude maneuvering capabilities of UAS, as well as the rapid development of technology and methods, make UAS-based photogrammetry applicable to many civil engineering...
    Resource Type:
    Dissertation
    Full Text:
    visualization, 3D mapping, progress monitoring, construction, structural inspection, maintenance, and

  • Evaluating Methods of Aligning Real-Time GNSS Networks to the National Spatial Reference System

    Creator:
    Ohene, William
    Abstract:
    Aligning Real-Time Networks (RTNs) with the National Spatial Reference System (NSRS) is crucial to ensure accuracy, consistency, interoperability, and long-term data integrity for geospatial applications. However, the effectiveness of different alignment methods as well as the need for monitoring approaches to maintain alignment consistency with the NSRS have not yet...
    Resource Type:
    Masters Thesis
    Full Text:
    recommends effective monitoring practices, such as setting horizontal and vertical displacement thresholds

  • Tidal influence on downstream fining in gravel-bed rivers

    Creator:
    Coles, Derron Rafiq
    Abstract:
    This research examines the downstream fining phenomenon as it operates in coastal gravel-bed rivers of Oregon. Downstream fining is a change in bed composition toward smaller sediment sizes in the downstream direction. Changes in stream flow discharge and channel slope affect the rate of bed-load transport, thereby altering the downstream...
    Resource Type:
    Dissertation
    Full Text:
    expansion of field research for added understanding of downstream fining. Bulk sampling of the armor

  • Assimilation of Multi-Sensor Data into Numerical Hydrodynamic Models of Inland Water Bodies

    Creator:
    Javaheri, Amir
    Abstract:
    Numerical models are effective tools for simulating complex physical processes such as hydrodynamic and water quality processes in aquatic systems. The accuracy of the model is dependent on multiple model parameters and variables that need to be calibrated and regularly updated to reproduce changing aquatic conditions accurately. Multi-sensor water temperature...
    Resource Type:
    Dissertation
    Full Text:
    monitoring technologies, can improve model accuracy by providing benefits of individual monitoring

  • Evaluation of Low-Impact Development (LID) Treatment Train at OSU-Benton County Green Infrastructure Facility

    Creator:
    Saduova, Alisha
    Abstract:
    Urban stormwater runoff with a high impervious area can significantly impact pollution concentrations of receiving water bodies. The use of low impact development (LID), which mimics the hydrological properties of the site before development, has been studied in an increasing number of studies, and the available database has shown to...
    Resource Type:
    Masters Thesis
    Full Text:
    characteristics of the monitoring site, the analytical methods, sampling methods, and water quality parameters

  • Nitrate and pesticide transport under pear production in clay and sandy soil

    Creator:
    Cao, Weidong
    Abstract:
    Groundwater contamination on irrigated land is of concern in this nation and around the world. In order to reduce the potential of groundwater contamination by agricultural practices such as irrigation, fertilizer and pesticide application, vadose-zone monitoring and sampling are needed. The main objective of this study was to evaluate impacts...
    Resource Type:
    Masters Thesis
    Full Text:
    pesticide application, vadose-zone monitoring and sampling are needed. The main objective of this study

  • Radon-222 as a tracer for performance assessment of NAPL remediation technologies in the saturated zone : an experimental investigation

    Creator:
    Gottipati, Sarayu
    Abstract:
    Persistence of Non aqueous phase liquids (NAPLs) in the subsurface at residual saturations eventually contributes to undesirable groundwater contamination. Proper characterization of subsurface NAPL, its location, composition and distribution, is essential for the chosen remediation technology to be effective. It is also desirable to assess the performance of remedial actions...
    Resource Type:
    Masters Thesis
    Full Text:
    detecting and quantifying NAPLs, and monitoring the progress of NAPL remediation. The results of this