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Articles 1 - 18 of 18
Full-Text Articles in Engineering
Circular Reinforced Concrete Columns Damaged By Fire And Retrofitted With Cfrp And Steel Jacketing, Jia Xu
Circular Reinforced Concrete Columns Damaged By Fire And Retrofitted With Cfrp And Steel Jacketing, Jia Xu
Dissertations - ALL
In recent decades, the post-fire behavior of reinforced concrete (RC) columns with normal and high-strength concrete has become an important research topic. Numerous studies have demonstrated that RC columns exhibit good fire resistance owing to the thermal properties of concrete. Therefore, reinforced concrete structures rarely collapse within a finite fire duration and can be successfully repaired. Along with the increasing number of skyscrapers, high-strength concrete (HSC) has played an equally important role as normal-strength concrete (NSC) in the industry. In this study, the thermal behavior of RC columns with NSC and HSC exposed to ISO 834 standard fire for various …
Transformational Leadership And The Adoption Of Sustainability And Asset Management Practices In Ground Transportation Organizations, Mohammad M. Bushahri
Transformational Leadership And The Adoption Of Sustainability And Asset Management Practices In Ground Transportation Organizations, Mohammad M. Bushahri
Dissertations - ALL
The unprecedented challenges the infrastructure domain has been facing for the past few decades are forcing the authorities and owners of relevant organizations, particularly within the ground transportation sector, to introduce more innovative measures and to mitigate risks by embracing and adopting sustainability and asset management practices. This study examined the relationship between transformational leadership and the embracing and adopting of sustainability and asset management practices in the U.S. ground transportation sector. Further, this study assessed the mediation effect of organizational innovation on the relationship between transformational leadership style and the leaders' perception in terms of adaptation of sustainability and …
Investigation Of Elastic Parameters And Pavement Modeling With Eps Geofoam, Engda Kassahun Temesgen
Investigation Of Elastic Parameters And Pavement Modeling With Eps Geofoam, Engda Kassahun Temesgen
Dissertations - ALL
Models using EPS geofoam rely on input elastic parameters derived from compression tests on small size samples. Young's modulus and Poisson's ratio are parameters required to model isotropic and homogenous material behavior. For the most widely used EPS density grade of 20 Kg/m3 (1.25 pcf), Young's modulus of 4 MPa and Poisson's ratio of 0.1 are commonly used. Use of these values in models led to unreasonable long term deformation predictions that contradicted with field observations. Tests on small samples are prone to edge effects. Edge effects in turn result in underestimation of input elastic parameters. Alternative tests and sensing …
Assessment Of Pluvial Flooding In Syracuse, Ny, Using High-Resolution Topographic Data, Yngrid Pereira Marques
Assessment Of Pluvial Flooding In Syracuse, Ny, Using High-Resolution Topographic Data, Yngrid Pereira Marques
Theses - ALL
Although there have been many advances in regulations to assess flood risk in urban environments, the majority of these investigations to date have focused on fluvial or coastal flooding. However, in urban systems, pluvial flooding continues to be a pressing issue in need of attention. Due to the limited research on pluvial flooding in Syracuse, NY, its population and assets are exposed to the risks imposed by this type of flooding, as their primary metric for delineating flood risk is the traditional riverine flood zones designated by the Federal Emergency Management Agency (FEMA). To address this issue, this research implemented …
Integrated Water Quality Monitoring Of Skaneateles Lake Tributaries, Mengyi Zhang
Integrated Water Quality Monitoring Of Skaneateles Lake Tributaries, Mengyi Zhang
Theses - ALL
Skaneateles Lake is the drinking water source for the City of Syracuse and surrounding areas. Harmful algal blooms (HABs) have been occurring in Skaneateles Lake every year since 2017 and posing a great threat to water quality and drinking water safety. Although the exact cause of the HABs is still unclear, sunlight, quiescent conditions, warm temperature, and elevated concentrations of nitrogen and phosphorus seem to favor the development of such blooms. In this study, a custom-built, low-cost, multi-parameter sensor unit was designed, built, and deployed on a third-order tributary. The unit collected high-frequency data for stage, temperature, pH, and dissolved …
Hydrus-1d Modeling To Represent Hydrologic Performance Of The Oncenter Green Roof, Courtney Gammon
Hydrus-1d Modeling To Represent Hydrologic Performance Of The Oncenter Green Roof, Courtney Gammon
Theses - ALL
Green infrastructure has the potential to alleviate stormwater runoff and reduce combined sewer overflows. Green roofs have stormwater mitigation potential in urban areas but further analysis to predict performance is needed. This research aims to understand how rainfall parameters affect green roof retention and reduction during storm events and whether a one-dimensional hydrologic model can be used to accurately predict performance. An extensive network of sensors on the OnCenter green roof in downtown Syracuse, New York, was utilized for analysis and modeling. This roof is larger than nearly all other green roofs that have been previously studied, and the layer …
Effects Of Acid Deposition And Changing Climate On The Hydrochemistry And Critical Loads Of Watersheds In The Adirondack Region Of New York, Shuai Shao
Dissertations - ALL
Despite decreases in acidic deposition since the 1970s, the recovery of surface waters from acidification has been limited primarily due to the depletion of exchangeable base cations, net mineralization of organic sulfur and nitrogen and release of previously retained SO42- and NO3-, and increases in concentrations of naturally occurring organic acids from soil. The future recovery of stream chemistry from acidic deposition may be altered by projected increases in temperature and precipitation associated with a changing climate. The goals of this study were to conduct a modeling analysis of the response of soils and streams in the Adirondack Park, New …
A Building Information Modeling (Bim)-Centric Digital Ecosystem For Smart Airport Life Cycle Management, Basak Keskin
A Building Information Modeling (Bim)-Centric Digital Ecosystem For Smart Airport Life Cycle Management, Basak Keskin
Dissertations - ALL
An increasing number of new airport infrastructure construction and improvement projects are being delivered in today's modern world. However, value creation is a recurring issue due to inefficiencies in managing capital expenditures (CapEx) and operating expenses (OpEx), while trying to optimize project constraints of scope, time, cost, quality, and resources. In this new era of smart infrastructure, digitalization transforms the way projects are planned and delivered. Building Information Modeling (BIM) is a key digital process technique that has become an imperative for today's Architecture, Engineering, Construction and Operations (AECO) sector. This research suggests a BIM-centric digital ecosystem by detailing technical …
A Building Information Modeling (Bim)-Centric Digital Ecosystem For Smart Airport Life Cycle Management, Basak Keskin
A Building Information Modeling (Bim)-Centric Digital Ecosystem For Smart Airport Life Cycle Management, Basak Keskin
Dissertations - ALL
An increasing number of new airport infrastructure construction and improvement projects are being delivered in today’s modern world. However, value creation is a recurring issue due to inefficiencies in managing capital expenditures (CapEx) and operating expenses (OpEx), while trying to optimize project constraints of scope, time, cost, quality, and resources. In this new era of smart infrastructure, digitalization transforms the way projects are planned and delivered. Building Information Modeling (BIM) is a key digital process technique that has become an imperative for today’s Architecture, Engineering, Construction and Operations (AECO) sector. This research suggests a BIM-centric digital ecosystem by detailing technical …
Tracking The Rain: Can We Use Remote In Situ Sensors To Evaluate The Effectiveness Of Green Infrastructure?, Ethan Schafer
Tracking The Rain: Can We Use Remote In Situ Sensors To Evaluate The Effectiveness Of Green Infrastructure?, Ethan Schafer
Honors Capstone Projects - All
For decades Onondaga County and the City of Syracuse, New York, have struggled with water quality issues involving combined sewer overflows. These combined sewer overflows and the lack of an appropriate system to mitigate storm water runoff have continually contributed to the degradation of Onondaga Lake and the streams draining into it. To combat the issues presented by combined sewer overflows, Onondaga County implemented the storm water reduction program known as "Save the Rain". The Save the Rain program aims to utilize various forms of green infrastructure to reduce storm water flows into the combined sewer system. Examples of green …
The Role Of The Structural Engineer In The Contemporary Design Process, Amanda Yeager
The Role Of The Structural Engineer In The Contemporary Design Process, Amanda Yeager
Honors Capstone Projects - All
This capstone is a critical look at the contemporary design process, particularly design competitions, and the role of the structural engineer in that process. Often, the design process for competitions is architect-led with the technical experts entering the process after the major design decisions have been made. As a result, structural requirements and other technical considerations are too often left out of the conceptual design proposals, leading to extensive design changes and costly structural issues to resolve before the structure can be realized. To investigate this issue, a structural analysis of an ambitious winning pedestrian bridge design was conducted. The …
Stress-Strain Behavior By Image Analysis, Mix Density And Pre-Strain Effects Of Eps Geofoam, Chen Liu
Stress-Strain Behavior By Image Analysis, Mix Density And Pre-Strain Effects Of Eps Geofoam, Chen Liu
Theses - ALL
In order to have a deeper understanding of the engineering performances of EPS geofoam, it is necessary to study the stress-strain response and internal strain distribution when loaded. In this investigation, the key objective is to study the stress-strain behavior of EPS geofoam under different conditions and develop construction practical suggestions when using geofoam. The scope of this research is divided into three main sections: (1) study the effect of induced anisotropy on the stress-strain behavior of EPS geofoam; (2) evaluate stress distribution within EPS blocks by using image analysis system; (3) analyze the effect of combining different EPS densities …
Evaluation Of Volatile And Semi-Volatile Organic Compounds Potentially Associated With The Gas Shale Fracturing Process In The Fayetteville And Marcellus Shale, Karl Albert Oetjen
Evaluation Of Volatile And Semi-Volatile Organic Compounds Potentially Associated With The Gas Shale Fracturing Process In The Fayetteville And Marcellus Shale, Karl Albert Oetjen
Theses - ALL
With the recent growth of the natural gas industry coupled with technological advancements, gas shale fracturing has become an effective and highly profitable method for natural gas production. Unlike conventional natural gas extraction which may require vertical fracturing, gas shale fracturing relies on a method known as horizontal fracturing to remove gas trapped within the impermeable facies. Compared to vertical fracturing, horizontal fracturing requires larger amounts of fluids to be injected downhole under high pressure. These fracturing fluids can contain high concentrations of petroleum hydrocarbons with known adverse health effects. Due to the large volumes used, the potential for groundwater …
Effect Of Particle Shape And Size On Compressibility Behavior Of Dredged Sediment In A Geotextile Tube Dewatering Application, Louis Lafata
Effect Of Particle Shape And Size On Compressibility Behavior Of Dredged Sediment In A Geotextile Tube Dewatering Application, Louis Lafata
Honors Capstone Projects - All
Each year, more than 250 million cubic yards of sediment need to be dredged from U.S. ports, harbors and waterways to maintain navigability. This is accomplished by dredging, the process of excavating submerged sediment by means of scooping or suction. Dredged sediments have low solids content, typically between 10% and 20% for hydraulic dredging. Geotextile tubes are one of many methods utilized to dewater these sediments, which is a process of removing water from sediment that contains low percent solids. Understanding the engineering behavior of slurries inside geotextile tubes is critical for the evaluation of the properties of the dewatered …
Biogeochemical Modeling Of The Response Of Forest Watersheds In The Northeastern U.S. To Future Climate Change, Afshin Pourmokhtarian
Biogeochemical Modeling Of The Response Of Forest Watersheds In The Northeastern U.S. To Future Climate Change, Afshin Pourmokhtarian
Dissertations - ALL
In this dissertation I assessed the potential hydrochemical responses of future climate change conditions on forested watersheds in the northeastern U.S. using climate projections from several atmosphere ocean general circulation models (AOGCMs) under different carbon dioxide (CO2) emissions scenarios. The impacts of changing climate on terrestrial ecosystems have been assessed by observational, gradient, laboratory and field studies; however, state-of-the-art biogeochemical models provide an excellent tool to investigate climatic perturbations to these complex ecosystems. The overarching goal of this dissertation was to apply a fully integrated coupled hydrological and biogeochemical model (PnET-BGC) to evaluate the effects of climate change and increasing …
Estimation Of Solute Fluxes From Ungaged Headwater Catchments In The Catskill Park Of New York State, Chris Gianfagna
Estimation Of Solute Fluxes From Ungaged Headwater Catchments In The Catskill Park Of New York State, Chris Gianfagna
Civil and Environmental Engineering - Theses
Predictions of flow and subsequent solute fluxes from ungaged basins have important implications both for water resources management and ecosystem monitoring studies. The Catskill region of New York State is one such place that requires both water resources management and ecosystem monitoring due to its strategic location as the main water-supplying region for New York City. This study examines the differences in chemical mass flux estimates made in ungaged basins using three different chemistry aggregation methods for solute concentrations determined from monthly grab samples. The efficacy of area ratios for predicting flow at the upstream location of a nested pair …
Spatial Patterns Of Mercury In Atmospheric Deposition, Soils And Lake Biota In The Adirondack Park, New York, Xue Yu
Civil and Environmental Engineering - Dissertations
Mercury (Hg), as a trace element cycling in the environment, poses a serious health threat to both humans and wildlife due to its toxicity. Atmospheric deposition is the main source of Hg to most remote environments. The Adirondack Park in New York State of the United States receives moderate Hg deposition, and is a region characterized by relatively high concentrations of Hg in the terrestrial and especially aquatic biota. It is important to understand the mechanisms that contribute to the sensitivity of this region to Hg inputs. In my research, studies of the spatial patterns of Hg in atmospheric deposition, …
Effects Of Calcium Addition On Structure And Bioavailability Of Soil Organic Matter, Ankit Balaria
Effects Of Calcium Addition On Structure And Bioavailability Of Soil Organic Matter, Ankit Balaria
Civil and Environmental Engineering - Dissertations
The northeastern USA has a long history of acid rain, which has impacted soil fertility and raised concerns about the sustainability of the forests in the region. To facilitate recovery of these forests, calcium addition, in the form of wollastonite, was evaluated as a remedial tool at Hubbard Brook Experimental Forests in New Hampshire, USA. In order to study the effects of these amendments on soil organic matter and soil microbes, I characterized the structural chemistry of soil organic matter (SOM) and its hot-water extractable organic matter (HWEOM) fraction for Hubbard Brook soils and studied the changes in the structure …