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Articles 5221 - 5250 of 39805

Full-Text Articles in Civil and Environmental Engineering

Filter-Based Air Sampler Capable Of Integration Into Small Unmanned Aerial Vehicles, Robert M. Eninger, Stepanie A. Ohms, Jeremy M. Slagley Apr 2023

Filter-Based Air Sampler Capable Of Integration Into Small Unmanned Aerial Vehicles, Robert M. Eninger, Stepanie A. Ohms, Jeremy M. Slagley

AFIT Patents

A filter-based air sampler, more specifically a filter-based air sampler capable of integration into small unmanned aerial systems is disclosed. The filter-based air sampler may include a filter assembly which has as its component parts: an open faced air intake component, a filter, and a filter support that has a central supporting grid. The filter assembly may joined to the housing of a fan, such as a centrifugal fan, with the supporting grid of the filter support being disposed over the air inlet of the fan.

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Overview Of The Application Of Remote Sensing In Effective Monitoring Of Water Quality Parameters, Godson Ebenezer Adjovu, Haroon Stephen, David James, Sajjad Ahmad Apr 2023

Overview Of The Application Of Remote Sensing In Effective Monitoring Of Water Quality Parameters, Godson Ebenezer Adjovu, Haroon Stephen, David James, Sajjad Ahmad

Civil and Environmental Engineering and Construction Faculty Research

This study provides an overview of the techniques, shortcomings, and strengths of remote sensing (RS) applications in the effective retrieval and monitoring of water quality parameters (WQPs) such as chlorophyll-a concentration, turbidity, total suspended solids, colored dissolved organic matter, total dissolved solids among others. To be effectively retrieved by RS, these WQPs are categorized as optically active or inactive based on their influence on the optical characteristics measured by RS sensors. RS applications offer the opportunity for decisionmakers to quantify and monitor WQPs on a spatiotemporal scale effectively. The use of RS for water quality monitoring has been explored in …

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Persistence Of Dna From Biocontained Genetically Engineered Microbes, Wentao Dai Apr 2023

Persistence Of Dna From Biocontained Genetically Engineered Microbes, Wentao Dai

McKelvey School of Engineering Graduate Student Theses & Dissertations

The utilization of genetically engineered microbes in environmental systems requires effective biocontainment mechanisms to ensure their safe operation. CRISPR-based kill switches are a promising solution, inducing cell death through site-specific DNA cleavage under specific environmental conditions. In this study, we aimed to assess the impact of CRISPR-based kill switches on the abundance and persistence of bacterial DNA. Our results revealed that while CRISPR-based kill switches were capable of achieving high reductions in viable Escherichia coli Nissle 1917 (EcN); the DNA largely remained intact. This was observed in two strains of EcN: one enabled with multi-locus genome cleavage, and the other …

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Applicability Of A Flood Forecasting System For Nebraska Watersheds, Sinan Rasiya Koya, Nicolas Velasquez Giron, Marcela Rojas, Ricardo Mantilla, Kirk Harvey, Daniel Ceynar, Felipe Quintero, Witold F. Krajewski, Tirthankar Roy Apr 2023

Applicability Of A Flood Forecasting System For Nebraska Watersheds, Sinan Rasiya Koya, Nicolas Velasquez Giron, Marcela Rojas, Ricardo Mantilla, Kirk Harvey, Daniel Ceynar, Felipe Quintero, Witold F. Krajewski, Tirthankar Roy

Department of Civil and Environmental Engineering: Faculty Publications

Accurate and timely flood prediction can reduce the risk of flooding, bolster preparedness, and help build resilience. In this study, we have developed a flood forecasting system prototype and checked its potential for carrying out operational flood forecasting in the state of Nebraska. This system builds upon some of the core components of the Iowa Flood Information System (IFIS), which is a state-of-the-art platform widely recognized around the world. We implemented our platform on a pilot basin in Nebraska (Elkhorn River basin) by installing eight stream sensors and setting up the hydrologic model component of IFIS, i.e., the Hillslope Link …

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Beirut Arab University - Faculty Of Engineering - Newsletter Issue 0, Faculty Of Engineering, Beirut Arab University Apr 2023

Beirut Arab University - Faculty Of Engineering - Newsletter Issue 0, Faculty Of Engineering, Beirut Arab University

Engineering Newsletters

No abstract provided.

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A Comprehensive Study On Non-Proprietary Ultra-High-Performance Concrete Containing Supplementary Cementitious Materials, Seyedsaleh Mousavinezhad, Gregory J. Gonzales, William K. Toledo, Judith M. Garcia, Craig M. Newston, Srinivas Allena Apr 2023

A Comprehensive Study On Non-Proprietary Ultra-High-Performance Concrete Containing Supplementary Cementitious Materials, Seyedsaleh Mousavinezhad, Gregory J. Gonzales, William K. Toledo, Judith M. Garcia, Craig M. Newston, Srinivas Allena

Civil and Environmental Engineering Faculty Publications

Ultra-high performance concrete (UHPC) is a novel cement-based material with exceptional mechanical and durability properties. Silica fume, the primary supplementary cementitious material (SCM) in UHPC, is expensive in North America, so it is often substituted with inexpensive class F fly ash. However, future availability of fly ash is uncertain as the energy industry moves toward renewable energy, which creates an urgent need to find cost-effective and environmentally friendly alternatives to fly ash. This study investigated replacing cement, fly ash, and silica fume in UHPC mixtures with ground granulated blast-furnace slag (GGBFS), metakaolin, and a natural pozzolan (pumicite). To identify acceptable …

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Performance Assessment Of Bioasphalt Mixtures Containing Guayule Resin As An Innovative Biobased Asphalt Alternative, Ahmed Hemida, Magdy Abdelrahman Apr 2023

Performance Assessment Of Bioasphalt Mixtures Containing Guayule Resin As An Innovative Biobased Asphalt Alternative, Ahmed Hemida, Magdy Abdelrahman

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Guayule resin was investigated through mixture to assess its role in the field performance. For performance comparisons, conventional asphalt, neat guayule, asphalt-rubber-guayule, and guayule-rubber binders were implied. Field-simulated lab mixtures were made to investigate the major distresses. Modified Lottman, rut, semicircular bending, and disk-shaped compact tension tests were used to assess stripping, rutting, fatigue, and thermal cracking resistances. Stripping and rutting susceptibilities were also assessed by Hamburg wheel-tracking test. The outcomes disclosed that when the modified Lottman test was used, guayule containing a 7% air content was more susceptible to stripping than that containing a 3.5% air content, resulting in …

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Pedestrian Bridge For Discovery & Innovation, Matthew Hale, Dylan Stegman, Jake Porter Apr 2023

Pedestrian Bridge For Discovery & Innovation, Matthew Hale, Dylan Stegman, Jake Porter

Civil, Environmental and Sustainable Engineering Senior Theses

A new pedestrian bridge was designed adjacent to the Children’s Discovery Museum of San Jose spanning across the Guadalupe River in the Downtown San Jose area. This design includes structural, geotechnical, and construction components. The architectural aspects of the bridge include two intertwined mass timber arches, galvanized steel cables, and a deck consisting of wide flange I-beams and a proprietary structural glass deck system. These features allow the bridge to seamlessly integrate into the surrounding environment as well as expose structural components of a pedestrian bridge that would otherwise be covered by a traditional bridge deck. All disciplinary components of …

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New Braunfels Stormwater Park, Glen Falconio, Judah Foster, Teagan Moore Apr 2023

New Braunfels Stormwater Park, Glen Falconio, Judah Foster, Teagan Moore

Civil, Environmental and Sustainable Engineering Senior Theses

Comal County, located in a region in Texas inundated by a high frequency of floods, has faced over $272 million in flood damages to properties and crops. The largest urban area in the county, New Braunfels has made efforts to increase the quantity of flood mitigation practices in the city through weir construction, stormwater runoff control requirements, and new drainage proposals. Still, there are older parts of the city lacking stormwater management projects. A stormwater park serving the region along the Dry Comal Creek has been conceptualized to manage stormwater, increase water quality in the creek, and provide recreational value …

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Finn Hall Community Spaces Redesign, Kaan Euchukanonchai, Kevin Liang, Niko Lopez Apr 2023

Finn Hall Community Spaces Redesign, Kaan Euchukanonchai, Kevin Liang, Niko Lopez

Civil, Environmental and Sustainable Engineering Senior Theses

Carbon emissions negatively impact the environment through climate change, air pollution, and rising sea levels, among many other factors. One large contributor to carbon emissions is industrialization, more specifically, the building sector. Based on Architecture 2030, a non-governmental organization whose primary mission is to build an environment free from carbon emissions, building operations and the construction industry contribute to 40% of carbon emissions (Architecture 2030). As more buildings are being constructed, the need for reducing carbon emissions increases. This senior design project looked at Finn Residence Hall, a dormitory on the premises of Santa Clara University. The current design of …

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Highway 17 Wildlife Crossing, Taryn Chisholm, Seema Singh, Justin Uyeno Apr 2023

Highway 17 Wildlife Crossing, Taryn Chisholm, Seema Singh, Justin Uyeno

Civil, Environmental and Sustainable Engineering Senior Theses

Highway 17 is an essential corridor for people to commute between the Bay Area and the Santa Cruz regions, but this highway also creates a barrier between wildlife territories, fragmenting their habitats and stranding animal populations on either side. The lack of crossing infrastructure along Highway 17 forces wildlife to attempt to cross the highway into oncoming traffic, causing wildlife-vehicle collisions (WVC) which endangers the lives of motorists and animals alike. In order to address this problem, the team designed a precast, concrete culvert crossing underneath Highway 17 to provide a safer passageway to increase habitat connectivity as well as …

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Discrete-Element Modeling Of Shear-Induced Particle Migration During Concrete Pipe Flow: Effect Of Size Distribution And Concentration Of Aggregate On Formation Of Lubrication Layer, Tooran Tavangar, Masoud Hosseinpoor, Jeffrey S. Marshall, Ammar Yahia, Kamal Khayat Apr 2023

Discrete-Element Modeling Of Shear-Induced Particle Migration During Concrete Pipe Flow: Effect Of Size Distribution And Concentration Of Aggregate On Formation Of Lubrication Layer, Tooran Tavangar, Masoud Hosseinpoor, Jeffrey S. Marshall, Ammar Yahia, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Paper Seeks to Better Understand the Particulate Mechanics Giving Rise to the Lubrication Layer (LL) in Flows with Wide Particle-Size Distributions (PSD) Typical of Concrete Pumping Applications. the Study Uses a Soft-Sphere Discrete Element Method (DEM) to Simulate the Shear-Induced Particle Migration (SIPM) Mechanism of Formation of the LL. to Provide Realistic Understanding of SIPM and Rheological Heterogeneity of Concrete, Three Wide PSDs (Fine, Medium, and Coarse) and Three Different Concentrations (10 %–40 %) of Five Spherical-Particle Subclasses (1–17 Mm Diameter) Were Investigated. the Radial Evolution of Concentration and Particle Distribution Was Simulated over Time and the LL Formation …

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Cyclic Behavior Of Transitional Fine-Grained Soils In Northern Willamette Valley, Frank Jarman Apr 2023

Cyclic Behavior Of Transitional Fine-Grained Soils In Northern Willamette Valley, Frank Jarman

Civil and Environmental Engineering Master's Project Reports

As discussed within studies from Idriss and Boulanger (2008) and Bray and Sancio (2006), the undrained cyclic shear behavior of low-plasticity fine-grained soils will transition between liquefaction (sand-like behavior) to cyclic softening (clay-like behavior) over a narrow range of plasticity index (PI). Despite not being sufficiently understood, the cyclic behavior of low plasticity silts has become an increasingly important field of study due to the significant impact it has on ground deformations and infrastructure failure in areas that are seismically active. Laboratory tests were performed on soils by third party consultants on a site located in the northern Willamette Valley, …

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Liquefaction Triggering In Low-Plasticity Silts And Effects Of Liquefaction-Induced Lateral Spreading On A Reinforced-Concrete Pile, Jared A. Martinez Apr 2023

Liquefaction Triggering In Low-Plasticity Silts And Effects Of Liquefaction-Induced Lateral Spreading On A Reinforced-Concrete Pile, Jared A. Martinez

Civil and Environmental Engineering Master's Project Reports

Liquefaction triggering and post-liquefaction effects on lateral loading of deep foundations is an emerging area of study. This project presents: the results of cyclic direct simple shear (CDSS) testing on a low-plasticity alluvial silt collected in Portland, Oregon; and analysis of the combined effects of liquefaction-induced lateral spreading on a reinforced-concrete pile using data collected from a shake table test. The former research determines the liquefaction susceptibility and post-liquefaction characteristics of a local transitional soil using stress-controlled CDSS testing, the latter explores the complex lateral loading a reinforced-concrete pile undergoes during seismic loading with liquefaction-induced lateral spreading of the ground …

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Ce-Qual-W2 Performance Assessment Modeling 1979 Grh Flume Study, Logan Negherbon Apr 2023

Ce-Qual-W2 Performance Assessment Modeling 1979 Grh Flume Study, Logan Negherbon

Civil and Environmental Engineering Master's Project Reports

In an early review of numerical reservoir hydrodynamic models, the US Army Corps of Engineers developed a physical model at the US Army Waterways Experiment Station to assess the performance of modeling cold water underflow with numerous 2-dimensional and 3-dimensional numerical hydrodynamic models. Within this effort, the precursor for CE-QUAL-W2, the Laterally Averaged Reservoir Model, was defined and applied with limited success in representing the vertical velocity profile and outflow temperatures series collected from the physical model in the General Reservoir Hydrodynamics flume. CE-QUAL-W2 has since been modified from this early form in numerous ways including incorporation of higher order …

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Supetai Well Filtration System, Nicholas Holtz, Shirley Naranjo, Eduardo Villegas Apr 2023

Supetai Well Filtration System, Nicholas Holtz, Shirley Naranjo, Eduardo Villegas

Civil, Environmental and Sustainable Engineering Senior Theses

The rural, Maasai community of Ewaso Ngiro lacks a dependable source of clean drinking water. Their well, Supetai Well, pumps out groundwater that has high amounts of fluoride making it unsafe to consume. The team worked with a local kenyan water and power company, Davis & Shirtliff, to design a reverse osmosis system that will remove all contaminants, including fluoride. The reverse osmosis system takes into consideration current water demand and future population growth. The system will include pre-treatment, reverse osmosis membranes, and post treatment. This system will be powered by solar panels. The team will provide a final report …

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Sustainable, Environmental Transit Hub (Seth) In Kapolei, Hawai‘I, Rebecca Ridao, Azi Nigmatullin, Andrew Ruiz, Matthew Flores Apr 2023

Sustainable, Environmental Transit Hub (Seth) In Kapolei, Hawai‘I, Rebecca Ridao, Azi Nigmatullin, Andrew Ruiz, Matthew Flores

Civil, Environmental and Sustainable Engineering Senior Theses

In this report, a detailed design of a Sustainable, Environmental Transit Hub is provided that has the potential to mitigate the overbearing traffic congestion problem on the primary highways of O‘ahu, Hawai‘i. The report will consist of a brief description on why the team considered reviewing this issue with an explanation of the problem statement followed by an alternative analysis breakdown, constraints and criteria list, chosen solution with the inclusion of the location, the team’s respective scopes of work, codes and regulations that were followed, ethical considerations, design specifications, and references that were used for information. The primary scopes that …

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Sustainable Design Of Reinforced Concrete Beam, Justin Lei, Alyssa Quezada, Juan Ramirez-Daza Apr 2023

Sustainable Design Of Reinforced Concrete Beam, Justin Lei, Alyssa Quezada, Juan Ramirez-Daza

Civil, Environmental and Sustainable Engineering Senior Theses

The need for sustainable methods of construction is continuously rising as heavily populated areas are growing in size and the demand for new construction is expanding. This project aims to identify typical environmental damages associated with the construction of a typical mixed-use building in San Jose, CA, specifically the emissions of greenhouse gasses; carbon dioxide. The project also aims to meet current design standards and requirements set by the American Concrete Institution and the California Building Code to ensure the safety of all users. Lastly, to ensure the design can be implemented in the field, a cost analysis of the …

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Templates To Transition: Making Solar-Generated Electricity Accessible For Lagos Residents, Adeola O. Adebajo Apr 2023

Templates To Transition: Making Solar-Generated Electricity Accessible For Lagos Residents, Adeola O. Adebajo

Senior Theses

According to the EPA, direct energy production results in at least 25% of the world’s emissions. This refers to emissions produced by burning coal, natural gas, and oil for electricity and heat. With the increasing effects of climate change, sustainable energy is becoming increasingly important as the world shifts away from fossil fuels. However, implementation of renewable energy sources is not as fast or as widespread as necessary. This paper aims to identify feasible solutions to the problem of renewable energy affordability in Nigeria especially in growing megacities like Lagos to ensure long lasting and climatefriendly energy sources. Two major …

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Component Testing And Characterization Of An Innovative Pressurized Sand Damper For The Response Modification Of Structures, Konstantinos Kalfas Apr 2023

Component Testing And Characterization Of An Innovative Pressurized Sand Damper For The Response Modification Of Structures, Konstantinos Kalfas

Civil and Environmental Engineering Theses and Dissertations

This study is partly motivated by the need to develop sustainable energy dissipation devices that do not suffer from oil leakage due to failure of their end seals and from displacement limitations; and partly from the need to develop a robust damper that consists only of traditional civil engineering materials (sand and steel) in association with the use of post-tensioned steel rods with which practitioner civil engineers are familiar. Past failures of fluid dampers are both disruptive and costly, therefore not in-line with the current design paradigm of sustainable engineering, where the design and construction of structural systems shall meet …

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Data From: Warming Of The Columbia River, 1853 To 2018, Malia Hanae Scott, Stefan Talke, David Jay, Heida Diefenderfer Apr 2023

Data From: Warming Of The Columbia River, 1853 To 2018, Malia Hanae Scott, Stefan Talke, David Jay, Heida Diefenderfer

Civil and Environmental Engineering Faculty Datasets

Water temperature is a critical ecological indicator; however, few studies have statistically modeled century-scale trends in riverine or estuarine water temperature, or their cause. Here, we recover, digitize, and analyze archival temperature measurements from the 1850s onward to investigate how and why water temperatures in the lower Columbia River are changing. To infill data gaps and explore changes, we develop regression models of daily historical Columbia River water temperature using time-lagged river flow and air temperature as the independent variables. Models were developed for 3 time periods (mid-19 th , mid-20 th , and early 21 st century), using archival …

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Efficient Recycling Of Waste Rubber In A Sustainable Fiber-Reinforced Mortar And Its Damping And Energy Dissipation Capacity, Haodao Li, Wu Jian Long, Kamal Khayat Apr 2023

Efficient Recycling Of Waste Rubber In A Sustainable Fiber-Reinforced Mortar And Its Damping And Energy Dissipation Capacity, Haodao Li, Wu Jian Long, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A Great Number of Waste Tires Are Discarded in Landfills, Occupying Land Resources, and Severely Endangering the Ecosystem. Upcycling These Wastes as Aggregates to Partially Substitute Natural Sand and Develop Structure-Function Integration in Concrete Structures is a Desirable Solution. in This Study, a Sustainable Fiber-Reinforced Rubberized Mortar with Superior Material Damping and Moderate Strength is Developed by Combined Use of Waste Crumb Rubber (WCR) Incorporated at 0, 30%, and 60%, by Volume of Sand, and Polyvinyl Alcohol (PVA) Fiber Added at 0, 0.5%, and 1%, by Volume, in a High-Volume Fly Ash Binder System. Low-Temperature Plasma (LTP) Pre-Treatment of the …

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Inter-Wythe Slip Design Criteria For Non-Composite Insulated Walls, Abdelrahman Awawdeh, Fray F. Pozo-Lora, Marc Maguire Apr 2023

Inter-Wythe Slip Design Criteria For Non-Composite Insulated Walls, Abdelrahman Awawdeh, Fray F. Pozo-Lora, Marc Maguire

Durham School of Architectural Engineering and Construction: Faculty Publications

Non-composite insulated wall connector design is governed by ICC-ES AC320. This standard works entirely in the loading domain, asking the engineer to prevent connector failure due to tension and shear loading. In this paper, the authors discuss additional criteria related to thermal loading and out-of-plane wind loading that create displacement demand in the non-composite connectors. Loads suitable for such analyses are not well defined. Loads are assumed and demonstrated herein and shown to cause significant displacement demand on connectors. Limited non-composite wythe connector testing is available, and some results are presented here. A comparison indicates that outright failure of non-composite …

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Unleash The Heat: Exploring Geothermal Energy Perspectives And Energy Literacy In São Miguel, Azores, Lena Mcdonough Apr 2023

Unleash The Heat: Exploring Geothermal Energy Perspectives And Energy Literacy In São Miguel, Azores, Lena Mcdonough

Independent Study Project (ISP) Collection

The green energy transition is moving ahead in EU countries at very different paces, and there are some key challenges that all regions currently face in trying to phase fossil fuels out of their energy mixes. One of these challenges is that most regions simply cannot harness enough renewable energy sources and simultaneously have the storage technology for creating a baseload power source as reliable as oil, coal and natural gas. That is, unless you sit in the middle of the Atlantic Ocean on the boundary of three tectonic plates, with a continuous and reliable renewable energy source beneath your …

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Paved With Good Intentions? A Geopolitical Analysis Of The Belt And Road Initiative In Central And Eastern Europe, Vincent Zhang Apr 2023

Paved With Good Intentions? A Geopolitical Analysis Of The Belt And Road Initiative In Central And Eastern Europe, Vincent Zhang

Independent Study Project (ISP) Collection

The objective of this analysis is to reveal the geopolitical and geoeconomic significance of the Belt and Road Initiative (BRI) to the region of Central and Eastern Europe (CEE). Launched in 2013 as a proposal for increased economic interconnectivity between China and Kazakhstan, the BRI has since grown to encompass hundreds of countries across Asia, Africa, and Europe. The region of CEE is of note as it is coterminous with important regional groupings like the 14 + 1 Cooperative Framework between China & CEE and a point of overlapping interests from actors like the European Union (EU), North Atlantic Treaty …

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Incorporating Variability In Kytc Planning And Project Development, Reginald Souleyrette, Teng Wang, Riana Tanzen, Arnold Stromberg Apr 2023

Incorporating Variability In Kytc Planning And Project Development, Reginald Souleyrette, Teng Wang, Riana Tanzen, Arnold Stromberg

Kentucky Transportation Center Research Report

Transportation planning and design decisions are typically made using point estimates of traffic and safety measures. This report addresses the uncertainty of data used to make these decisions. It focuses on two data elements — project safety ratings and volume estimates from traffic counts. For safety ratings, the Kentucky Transportation Cabinet’s Strategic Highway Investment Formula for Tomorrow (SHIFT) crash history score is used as a case study. Confidence intervals are developed for the Cabinet’s new safety metric, which incorporates estimates of future crashes by severity as well as excess expected crashes above safety goals. For traffic counts, the report develops …

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Warming Of The Columbia River, 1853 To 2018, Malia Hanae Scott, Stefan Talke, David Jay, Heida Diefenderfer Apr 2023

Warming Of The Columbia River, 1853 To 2018, Malia Hanae Scott, Stefan Talke, David Jay, Heida Diefenderfer

Civil and Environmental Engineering Faculty Publications and Presentations

Water temperature is a critical ecological indicator; however, few studies have statistically modeled century-scale trends in riverine or estuarine water temperature, or their cause. Here, we recover, digitize, and analyze archival temperature measurements from the 1850s onward to investigate how and why water temperatures in the lower Columbia River are changing. To infill data gaps and explore changes, we develop regression models of daily historical Columbia River water temperature using time-lagged river flow and air temperature as the independent variables. Models were developed for 3 time periods (mid-19 th , mid-20 th , and early 21 st century), using archival …

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Closure To "Some Insights On Flow Over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications For Enhanced Flow Measurement", Joseph M. Sinclair, S. Karan Venayagamoorthy, Timothy K. Gates Apr 2023

Closure To "Some Insights On Flow Over Sharp-Crested Weirs Using Computational Fluid Dynamics: Implications For Enhanced Flow Measurement", Joseph M. Sinclair, S. Karan Venayagamoorthy, Timothy K. Gates

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

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Indirect Bridge Monitoring Using Crowdsourced Smartphone Data From Passing Vehicles, Jase Sitton Apr 2023

Indirect Bridge Monitoring Using Crowdsourced Smartphone Data From Passing Vehicles, Jase Sitton

Civil and Environmental Engineering Theses and Dissertations

Bridges become susceptible to deterioration and damage as they age and are subjected to continually increasing demands. Bridge inspections help insure the integrity and safety for service and are conducted on a regular, but usually infrequency, basis. Traditional evaluation methods include visual inspections and permanent sensor installations. Visual inspections are both time and labor intensive and often require bridge closure or service interruption, while cost and logistics complications often prevent practical, widespread deployment of permanent sensor installations. Sensors, including smartphones, in moving vehicles may be used to monitor bridge condition over time and provide valuable insight into the dynamic behavior …

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Analysis Of Eccentrically Loaded Frp Partially Wrapped Reinforced Concrete Columns Subjected To Combined Environmental Erosion, Zhiqiang Gu, Congjie Wei, Chenglin Wu, Danying Gao, Peibo You, Dong Wei Apr 2023

Analysis Of Eccentrically Loaded Frp Partially Wrapped Reinforced Concrete Columns Subjected To Combined Environmental Erosion, Zhiqiang Gu, Congjie Wei, Chenglin Wu, Danying Gao, Peibo You, Dong Wei

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Behavior of Eccentrically Loaded Fiber Reinforced Polymer (FRP) Partially Wrapped Reinforced Concrete (RC) Columns under Combined Environmental Erosion Was Investigated in This Paper. Circular RC Columns Were Firstly Subjected to Chloride Erosion Where the Target Corrosion Degree (0, 10 %, and 20 %) is Obtained with Externally Applied Current. This Was Then Followed by Partially Strengthening with 2-Ply of Glass Fiber Reinforced Polymer (GFRP) Strips as Well as 50 Freeze–thaw Cycles. Series of Eccentric Compression Tests Were Conducted with Ranging Eccentricities of 0, 5 Mm, 10 Mm, and 15 Mm. for Comparison, the Carbon Fiber Reinforced Polymer (CFRP) Partially …

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