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Articles 6661 - 6690 of 11810
Full-Text Articles in Engineering
Structural Health Monitoring Using Novel Sensing Technologies And Data Analysis Methods, Seyedmasoud Malekzadeh
Structural Health Monitoring Using Novel Sensing Technologies And Data Analysis Methods, Seyedmasoud Malekzadeh
Electronic Theses and Dissertations
The main objective of this research is to explore, investigate and develop the new data analysis techniques along with novel sensing technologies for structural health monitoring applications. The study has three main parts. First, a systematic comparative evaluation of some of the most common and promising methods is carried out along with a combined method proposed in this study for mitigating drawbacks of some of the techniques. Secondly, nonparametric methods are evaluated on a real life movable bridge. Finally, a hybrid approach for non-parametric and parametric method is proposed and demonstrated for more in depth understanding of the structural performance. …
Equity And Fairness In Transport Planning: The State Of Play, Sarah Rock, Aoife Ahern Prof., Brian Caulfield Dr.
Equity And Fairness In Transport Planning: The State Of Play, Sarah Rock, Aoife Ahern Prof., Brian Caulfield Dr.
Conference Papers
This paper explores the concept of equity, or fairness, in transport. As a pillar of sustainable development, social equity is an important objective of transport planning. The provision of transport infrastructure can have significant equity impacts on society through the distribution of costs and benefits. In recent years, there has been an increase in research interest in transportation related equity issues. The paper outlines the primary theoretical traditions that relate to equity and transport equity, and how equity concerns are currently addressed and evaluated in academia and in practice. Recent research has attempted to establish stronger principles from which to …
Alternative Funding Mechanisms For State Transportation Systems In Predominantly Rural States, John E. Anderson, Eric Thompson
Alternative Funding Mechanisms For State Transportation Systems In Predominantly Rural States, John E. Anderson, Eric Thompson
Bureau of Business Research Publications
The Transportation Research Board of the National Academies has identified a number of research needs related to alternative transportation finance systems. Alternatives are needed because motor fuels taxes are proving to be insufficient to fund operation and maintenance costs of the transportation system. The long-term trend is likely to be continuing use of motor fuel taxes, supplemented by, or transitioning to, use-based fees. Current research in progress in this area is focused on designing variable fees that will internalize congestion externalities in urban areas. These approaches are particularly well suited to highly urbanized areas, but other approaches may be required …
Transformation Of, In, And By Learning In A Service-Learning Faculty Fellows Program, Mary Cazzell, Shirley Theriot, Joan M. Blakey, Melanie L. Sattler
Transformation Of, In, And By Learning In A Service-Learning Faculty Fellows Program, Mary Cazzell, Shirley Theriot, Joan M. Blakey, Melanie L. Sattler
Civil Engineering Faculty Publications - Archive
Transformative learning is the most desired core outcome in adult education. The qualitative study examined critical reflections for professional transformation related to development and implementation of service-learning courses or projects from four university faculty members during enrollment in a Service-Learning Faculty Fellows program and post-servicelearning implementation. Reflective questions related to faculty perceptions of student learning, service-learning as pedagogy, and their own learning— transformation of, in, and by learning, respectively. Content analyses of faculty reflections resulted in three categories of transformation based on three preservice-learning and three post-servicelearning descriptive themes: (1) transformation of student learning from anticipatory integration to conflicts between …
Investigation Of An Association Between Childhood Leukemia Incidences And Airports In Texas, Sala. Nanyanzi Senkayi, Melanie L. Sattler, Nancy Rowe, Victoria Chen
Investigation Of An Association Between Childhood Leukemia Incidences And Airports In Texas, Sala. Nanyanzi Senkayi, Melanie L. Sattler, Nancy Rowe, Victoria Chen
Civil Engineering Faculty Publications - Archive
As worldwide demand for air travel increases, emissions from airports will likely also increase. Airport emissions pose a concern due to lack of information about their quantity and impacts on human health and the environment. This research aimed to address the question of whether there is an association between childhood leukemia cases and airport emissions in Texas. Rather than looking at the impacts of a single airport on the surrounding community, this study looks at all airports in the state of Texas, and 2 134 incidences of childhood leukemia (children age 9 and under) state–wide over a 10–year period. The …
Effect Of Enhanced Leachate Recirculated (Elr) Landfill Operation And Gas Extraction On Greenhouse Gas Emission, Sonia Samir
Effect Of Enhanced Leachate Recirculated (Elr) Landfill Operation And Gas Extraction On Greenhouse Gas Emission, Sonia Samir
Civil Engineering Dissertations - Archive
The bioreactor/ enhanced leachate recirculated (ELR) landfill operation with the addition of moisture/ leachate to the landfill, accelerate the process of landfill waste decomposition; and increase the generation of LFG over a shorter period of time. Since emissions from the landfills are directly related to the gas generation, the increase in gas generation might also increase the emission from the landfill. On the contrary, the presence of gas extraction is suggested to mitigate the fugitive emissions from the landfills. Therefore, the motivation of the current study was to evaluate the effect of ELR operation as well as the gas extraction …
Estimation Of Optimum Compaction Level For Bioreactor Landfill Operation, Dipak Tiwari
Estimation Of Optimum Compaction Level For Bioreactor Landfill Operation, Dipak Tiwari
Civil Engineering Dissertations - Archive
The effect of compaction on the degradation of MSW is important for the successful operation of bioreactor landfill. It has been a general tendency to compact working face solid waste as much as possible to gain more space. Previous studies has shown moisture content, moisture recirculation and ambient temperature were important components for degradation. There was a limitation on the compaction effect on degradation. Although several studies were conducted in the past to find the hydraulic conductivity of the waste, there was lack of work to find the optimum compaction to achieve sufficient flow inside the landfill and thus to …
Spatial Variability Models And Prediction Analysis Of Soil Properties Using Geostatistics, Tejo Vikash Bheemasetti
Spatial Variability Models And Prediction Analysis Of Soil Properties Using Geostatistics, Tejo Vikash Bheemasetti
Civil Engineering Dissertations - Archive
Soils are composed of solid, water and air phases whose characteristics are highly variable. The interactions of these phases in the soil matrix can lead to different types of topographical formations and characteristics. Due to the uncertainty and complex interactions among these phases, studies on soils have always been a challenging problem for engineers. These variations and uncertainties make it necessary for engineers to adopt new techniques and methods to analyze soil properties in order to determine or interpret their generalized behaviors and patterns. Existing research in variability analysis tends to focus on the distribution of the soil properties, reliability-based …
Evaluation Of Lightweight Geofoam For Mitigating Bridge Approach Slab Settlements, Pinit Ruttanaporamakul
Evaluation Of Lightweight Geofoam For Mitigating Bridge Approach Slab Settlements, Pinit Ruttanaporamakul
Civil Engineering Dissertations - Archive
The bump at the end of a bridge infrastructure is one of the frequent problems found in Texas and other states. Transportation agencies spend millions of dollars annually to repair the bump problem. The major cause of the problem is the settlement of backfill materials and foundation soils, as well as the erosion of backfill. Research was undertaken at the University of Texas at Arlington to study the embankment located on US 67 over SH 174 in Johnson County, Cleburne, Texas. The embankment was reconstructed, replacing the top of existing fill soil with lightweight EPS 22 geofoam blocks to reduce …
Response Of Unsaturated Silty Sand Over A Wider Range Of Suction States Using A Novel Double-Walled Triaxial Testing System, Ujwalkumar Dashrath Patil
Response Of Unsaturated Silty Sand Over A Wider Range Of Suction States Using A Novel Double-Walled Triaxial Testing System, Ujwalkumar Dashrath Patil
Civil Engineering Dissertations - Archive
In recent decades, the state-of-the-art of our understanding of unsaturated soil performance has been considerably enhanced by incorporating novel and advanced features to the conventional testing devices such as direct shear device, ring shear device, triaxial device and true triaxial device. The novel suction-controlled triaxial system used in this research is fully automated and has enhanced features such as volume change device and double-walled cell to monitor the volume change accurately during all the stages of unsaturated triaxial test. Despite the sophistication, such devices can help in testing mechanical behavior of unsaturated soils only up to matric suction (s) value …
Numerical Modeling Of Ground Movements Associated With Trenchless Box Jacking Technique, Babak Haji Mohammad Hasan Mamaqani
Numerical Modeling Of Ground Movements Associated With Trenchless Box Jacking Technique, Babak Haji Mohammad Hasan Mamaqani
Civil Engineering Dissertations - Archive
The Trenchless Technology (TT) is defined as a family of methods used to install, renew, replace or renovate new pipe/box or existing pipe/box underground with little or no surface disruption. TT is divided into two main categories including Trenchless Construction Methods (TCMs) and Trenchless Renewal Methods (TRMs). TCMs are used to install new utilities and pipes underground while TRMs are used to renew, renovate and replace an existing utility or pipe. Box jacking (BJ) is a TCM used to install rectangular box culverts under existing facilities such as highways and railroads. In this method, box culverts are pushed through the …
A Technical And Economic Appraisal Of Insulation Retrofits, Niamh O'Brien
A Technical And Economic Appraisal Of Insulation Retrofits, Niamh O'Brien
Theses
The main aim of this literature review is to further develop the project brief and to examine what research has previously been undertaken in the field of thermal conductivity and retrofitting insulation. The basis of this project is to determine the effect of moisture in domestic cavity walls on the effectiveness of retrofitted insulation. The research began by highlighting the reasoning behind the need for insulation within domestic dwellings within Ireland and the guiding legislation in place in relation to this. Carrying on from this, the current methods used to retrofit insulation were examined, along with the types of insulation …
Evaluation Of Truck Signal Priority At N Columbia Blvd And Martin Luther King Jr. Blvd Intersection: Vissim Micro Simulation Analysis Of Truck Signal Priority, Maisha Mahmud
Civil and Environmental Engineering Master's Project Reports
Given the importance of over growing freight transportation system worldwide, engineers and planners are faced with the challenge of improving freight service in urban area using low cost measure. Truck Signal Priority is one of the strategy that can be used to improve operational efficiency with enhance safety benefits (red light running) of freight service, without major capital investment. In light to this interest this study focus on evaluating the impacts of freight signal priority on a high truck density intersection like N Columbia Blvd and NE Martin Luther King Jr. Blvd. Using a simulation tool, VISSIM, these impacts were …
Numerical Evaluation Of The Extended Endplate Moment Connection Subjected To Cyclic Loading, Mehdi Ghassemieh, Mehdi Jalalpour, Ali Akbar Gholampour
Numerical Evaluation Of The Extended Endplate Moment Connection Subjected To Cyclic Loading, Mehdi Ghassemieh, Mehdi Jalalpour, Ali Akbar Gholampour
Civil and Environmental Engineering Faculty Publications
In this paper, the seismic behaviour of extended endplate moment connection is analysed using finite element method (FEM). First, an existing test setup is modelled and analysed using ANSYS computer program. The model is validated by comparing the results from the finite element with the experimental ones. Afterwards, by changing the dimensions of members of the connection, their effect on the overall seismic performance of connection is investigated. The results show that by enlarging the column depth and stiffening the connection, the seismic performance is improved and the thickness of endplate should be chosen in a way that its moment …
Concession Analysis For Highway Infrastructure Projects Financed As Public-Private Partnerships, Tanaphat Jeerangsuwan
Concession Analysis For Highway Infrastructure Projects Financed As Public-Private Partnerships, Tanaphat Jeerangsuwan
Open Access Dissertations
Public funds allocated to the improvement and maintenance of highway infrastructure have reached the limits due to a rapid rate of socioeconomic growth and deterioration in infrastructure system performance. A public-private partnership (PPP) concessions a contractual and project financing mechanism that helps public authorities lessen the impact of their limited financial resources. In this project financing scheme, a public authority enters into a partnership with a private concessionaire for the purpose of developing a specific infrastructure facility. In return, the concessionaire receives the right to operate for a specified period of time. This creates strong potential for the delivery of …
Methods For Estimating Sediment Yield And Dam Capacity In The Great Lakes Watershed, Jennifer Hui
Methods For Estimating Sediment Yield And Dam Capacity In The Great Lakes Watershed, Jennifer Hui
Wayne State University Theses
Sedimentation is the most important factor in the longevity of dams built in the United States. As most dams are reaching their capacity for sediment storage, this study investigated the historical and predicted future rates of sediment accumulation as well as the remaining storage capacity. This study examined the mechanisms influencing sediment production and storage in the watershed to provide future insight regarding potential control of this process. Twelve reservoirs throughout the Great Lakes watershed were selected and analyzed for their greater applicability to the entire watershed. Both historic and new data were collected on these dams to determine how …
Measurements Of Fluvial Sediments Using A Single-Frequency Acoustic Attenuation System, Thomas Alexander Kajdan
Measurements Of Fluvial Sediments Using A Single-Frequency Acoustic Attenuation System, Thomas Alexander Kajdan
Electronic Theses and Dissertations
Suspended sediments are a global-scale pollutant that threaten the integrity of our waterways and pose an environmental threat to many aquatic ecosystems. Innovative techniques are required to continuously monitor this pollutant. Ultrasonic acoustic measurements have the potential to improve the temporal resolution of fluvial sediment data. This work investigates the use of a prototype field grade single-frequency acoustic attenuation system that was developed at the National Center for Physical Acoustics (NCPA), located at the University of Mississippi. This field-deployable unit consists of two 20 MHz immersion transducers that are aligned in a "pitch-catch" configuration at a fixed distance of 18 …
Comparison Of Costs Of Personal Protective Equipment For All Workers To Avoid Costs Of Fall Accidents, Sultan Noori Al-Karawi
Comparison Of Costs Of Personal Protective Equipment For All Workers To Avoid Costs Of Fall Accidents, Sultan Noori Al-Karawi
Masters Theses
"The construction industry is one of the most important industries in the United States. It is the biggest contributor in the growth of the U.S. economy. Despite the great achievements and prominent role for this sector in the U.S. economy, the construction industry is suffering from neglect and dereliction by related government institutions and private companies. This neglect led to formation of a negative image about the construction industry that has caused a deep impact in productivity and economic growth. One of the reasons is a high percentage of accidents that occur within the construction industry which leads to injuries …
Two Driven Pile Load Tests For Use In Missouri Lrfd Guidelines, Matthew Garry Stuckmeyer
Two Driven Pile Load Tests For Use In Missouri Lrfd Guidelines, Matthew Garry Stuckmeyer
Masters Theses
"A static pile load test program was initiated by the Missouri Department of Transportation (MoDOT) to evaluate the use of pile load tests in Missouri LRFD guidelines. The program's approach involves two phases to achieve the appropriate levels of reliability for driven piles in the state of Missouri. This thesis focuses on the data collection efforts of Phase 1. Two quick static pile load tests were performed to failure on test piles in the Southeast Lowlands geologic region of Missouri. The piles were dynamically monitored during installation and subsequent restrike tests performed. The results of the static and dynamic pile …
Shear Behavior Of High Strength Self-Consolidating Concrete In Nu Bridge Girders, Alexander Michael Griffin
Shear Behavior Of High Strength Self-Consolidating Concrete In Nu Bridge Girders, Alexander Michael Griffin
Masters Theses
"As the nation's infrastructure continues to age, advanced concrete technologies have been developed to both reduce a structure's costs and increase its life expectancy. Since the early 1990's, self-consolidating concrete (SCC) has been one of these technologies. Many, however, have been reluctant to implement SCC in highway girders due to the mixture constituents. One of these concerns is the reduced content and size of the coarse aggregate. These differences in the concrete potentially hinder SCC's mechanical properties and shear resistance. Additionally, for high strength concretes (HSC) with weaker aggregates, shear cracks tend to propagate through the coarse aggregate, reducing the …
Dynamic Testing Procedures For Performance Assessment Of Nuclear Fuel Rods, Travis M. Adams
Dynamic Testing Procedures For Performance Assessment Of Nuclear Fuel Rods, Travis M. Adams
Honors Theses and Capstones
Existing transportation probabilistic risk assessment for spent nuclear fuel in the United States is based on short-term (decades) on-site storage at power plants before transport. Updated risk assessment estimates will be required as extended on-site storage (centuries) and higher burnup levels in fuel become standard. Nuclear fuel rods under these two conditions are more brittle than rods from short-term storage and intermediate burnup due to several mechanisms, including hydrogen embrittlement. Development of risk assessment requires characterizations of dynamic behavior of these degraded rods under transportation scenarios. This Honors thesis provides an initial literature review for a larger project that will …
Longitudinal Analysis Of Crash Frequency Data, Mojtaba Ale Mohammadi
Longitudinal Analysis Of Crash Frequency Data, Mojtaba Ale Mohammadi
Doctoral Dissertations
"This study comprises mainly of three papers. First, a systematic evaluation of the effects of Missouri's Strategic Highway Safety Plan between 2004 and 2007 is presented. Negative binomial regression models were developed for the before-through-change conditions for the various collision types and crash severities. The models were used to predict the expected number of crashes assuming with and without the implementation of MSHSP. This procedure estimated significant reductions of 10% in crashes frequency and a 30% reduction for fatal crashes. Reductions in the number of different collision types were estimated to be 18-37%. The results suggest that the MSHSP was …
Evaluation Of Long Term Effects Of Erosion Due To Groin Placement In The Northern Yucatan Peninsula, Andrew V. Mahfood
Evaluation Of Long Term Effects Of Erosion Due To Groin Placement In The Northern Yucatan Peninsula, Andrew V. Mahfood
College of Graduate Studies: Theses & Dissertations
This thesis documents the results of a study conducted to evaluate the long term effects of groin placement on beach re-nourishment and beach restoration in the Yucatan peninsula. The study includes the evaluation of six control points located on Chelem beach in Yucatan, Mexico, very close to the Progreso pier. The control points were set up in an active groin field to record data on the re-nourishment project covering the Chelem beach area. These erosion control groins were constructed as part of an experimental project to see how the adopted U.S. Army Corps of Engineers guidelines, for installing groins, affected …
Effect Of Construction Worker Demographic On E-Learning With Hazard Communication Standard, Serhan Kaya
Effect Of Construction Worker Demographic On E-Learning With Hazard Communication Standard, Serhan Kaya
Wayne State University Theses
Construction safety and health training can be delivered by different training methods, such as traditional, online and blended learning. E-learning is a newly introduced method whose effectiveness is still being investigated. This study focuses on the effect of construction worker demographics on the effectiveness of e-learning. The univariate analysis technique was used to find out the distribution and frequency of data collected by an internet based system. Further, multivariate analysis (cross tabulation) and analysis of variance (ANOVA) were performed to determine the association between the independent variables which are age, gender, ethnic background, union status, number of employees in the …
Pile Load Distribution Behavior Of Pile Group Foundations Subjected To Combined Vertical Load And Moment, Janine Correa Faustino
Pile Load Distribution Behavior Of Pile Group Foundations Subjected To Combined Vertical Load And Moment, Janine Correa Faustino
Chulalongkorn University Theses and Dissertations (Chula ETD)
The purpose of this thesis is to perform parametric studies of maximum pile force, pile settlement, pile cap rotation and pile force distribution on square shape pile group foundation by employing three-dimensional finite element software, PLAXIS 3D. The square pile group foundation is subjected to combined vertical load and moment under the elastic material of two soil layers. For this study, a special element in PLAXIS 3D, called embedded pile element is used to model each pile in the pile group foundation. To simulate the pile group foundation, a small gap between pile cap and subsoil is introduced in the …
ผลเฉลยสถานะวิบัติของเสาเข็มรับแรงดันด้านข้างในดินเหนียวโดยการวิเคราะห์ไฟไนต์อิลิเมนต์, สุรภาพ แก้วสวัสดิ์วงศ์
ผลเฉลยสถานะวิบัติของเสาเข็มรับแรงดันด้านข้างในดินเหนียวโดยการวิเคราะห์ไฟไนต์อิลิเมนต์, สุรภาพ แก้วสวัสดิ์วงศ์
Chulalongkorn University Theses and Dissertations (Chula ETD)
วัตถุประสงค์ของวิทยานิพนธ์นี้เพื่อศึกษาเสาเข็มแรงดันด้านข้างวิบัติในดินเหนียว วิธีไฟไนต์อิลิเมนต์สองมิติและสามมิติถูกนำมาใช้เพื่อหาผลเฉลยในการศึกษานี้ การวิเคราะห์ไฟไนต์อิลิเมนต์แบบสามมิติบนระนาบความเครียดถูกนำมาใช้สำหรับการจำลองหน้าตัดแนวราบและหน้าตัดแนวดิ่ง การจำลองหน้าตัดแนวราบแสดงการประมาณของเสาเข็มรูปวงกลมหรือท่อรับแรงด้านข้างที่จุดศูนย์กลาง ในทางกลับกัน การจำลองหน้าตัดแนวดิ่งแสดงการประมาณของกำแพงฝังในดินซึ่งรับแรงดันด้านข้างและโมเมนต์ที่จุดบนสุด สำหรับกรณีเสาเข็มหน้าตัดแนวดิ่งและเสาเข็มจริงในระบบสามมิติ ที่หัวเสาเข็มถูกจำลองโดยแบ่งออกเป็นสองกรณีคือกรณีที่มีการยึดรั้งที่หัวเสาเข็มและไม่ยึดรั้งที่หัวเสาเข็ม นอกเหนือจากนี้ ผลกระทบของความหนาสำหรับการจำลองเสาเข็มหน้าตัดแนวดิ่งก็ถูกนำมาศึกษาเช่นกัน สำหรับการวิเคราะห์ทั้งหมด เสาเข็มถูกจำลองด้วยวัสดุแบบอิลาสติกและไม่เกิดการวิบัติขึ้นในโครงสร้าง ดินเหนียวถูกจำลองด้วยวัสดุแบบมอร์-คูลอมบ์ในสภาพไม่ระบายน้ำ ชิ้นส่วนเชื่อมต่อระหว่างดินและโครงสร้างถูกใช้ที่ผิวสัมผัสระหว่างดินเหนียวและเสาเข็มของทั้งสองหน้าตัด นอกจากนั้น ชิ้นส่วนเชื่อมต่อระหว่างดินและโครงสร้างถูกจำลองเป็นสองแบบคือ การเชื่อมต่อแบบแรงดึงสมบูรณ์ และ การเชื่อมต่อแบบไม่มีแรงดึง กรณีแรกจำลองสภาพไม่เกิดการแยกตัวระหว่างดินและโครงสร้าง แต่กรณีสองจำลองสภาพการแยกตัวระหว่างดินและโครงสร้าง ผลเฉลยแรงวิบัติของเสาเข็มรับแรงด้านข้างถูกนำเสนอในรูปของพารามิเตอร์ไร้มิติ ผลการศึกษาของงานวิจัยนี้ถูกเปรียบเทียบกับผลการศึกษาในอดีต นอกเหนือจากนี้ เส้นขอบเขตการวิบัติของผลเฉลยของเสาเข็มรับแรงในแนวราบและโมเมนต์ร่วมกันสำหรับกรณีเสาเข็มหน้าตัดแนวดิ่งและเสาเข็มจริงในระบบสามมิติก็ถูกนำเสนอเช่นกัน ท้ายที่สุด ผลกระทบสามมิติที่มีต่อผลเฉลยของตัวแปรไร้มิติของเสาเข็มรับแรงดันด้านข้างก็ถูกนำเสนอในงานวิจัยนี้
Laboratory Investigation And Numerical Modelling Of Track Foundation For High-Speed Railway Construction On Bangkok Soft Soil, Phitsanu Pholkainuwatra
Laboratory Investigation And Numerical Modelling Of Track Foundation For High-Speed Railway Construction On Bangkok Soft Soil, Phitsanu Pholkainuwatra
Chulalongkorn University Theses and Dissertations (Chula ETD)
The government of Thailand has recently decided to launch a high-speed railway project to promote regional economy and improve the logistics of trade to connect with other countries in Southeast Asia community. Raising a complication regarding the load transfers will certainly induce many problems to the railway system. Moreover, the constructions of railway substructures in the past often involve the low quality of materials especially in the Central Plain of Thailand. Therefore, it is necessary to determine the sources of construction materials for railway substructure materials. This study consists of two main objectives. The first objective is to investigate the …
Evaluation Of The Empirical Deck Design For Vehicular Bridges, Georges El-Gharib
Evaluation Of The Empirical Deck Design For Vehicular Bridges, Georges El-Gharib
UNF Graduate Theses and Dissertations
This research evaluated the feasibility of the empirical design method for reinforced concrete bridge decks for the Florida Department of Transportation [FDOT]. There are currently three methods used for deck design: empirical method, traditional method and finite element method. This research investigated and compared the steel reinforcement ratios and the stress developed in the reinforcing steel for the three different methods of deck design. This study included analysis of 15 bridge models that met the FDOT standards. The main beams were designed and load rated using commercial software to obtain live load deflections. The bridges were checked to verify that …
Examining Optimal Form Of Two Scale Approximation (Tsa) For Calculating Snl Source Term, Dorukhan Ardag
Examining Optimal Form Of Two Scale Approximation (Tsa) For Calculating Snl Source Term, Dorukhan Ardag
UNF Graduate Theses and Dissertations
Nonlinear four-wave interactions (Snl) are critical for acquiring realistic spectra needed by operational wave models. High computational demand to calculate these interactions led to an approximation method named the Discrete Interaction Approximation (DIA) to be used broadly in the major operational wave models for a long time. However, the accuracy of the DIA has been controversial since it was first introduced and more precise approximations such as the Two Scale Approximation (TSA in short) are now available. The only issue with the initial TSA`s efficiency is performing an order of a magnitude slower than the DIA in speed. …
Quantifying Ultra-High Performance Concrete Flexural System Mechanical Response, Yulin Xiao
Quantifying Ultra-High Performance Concrete Flexural System Mechanical Response, Yulin Xiao
Electronic Theses and Dissertations
The research and application of Ultra-high Performance Concrete (UHPC) has been developed significantly within the last 1-2 decades. Due to the specific property of high strength capacity, it is potential to be used in bridge deck system without shear reinforcement so that it provides even lighter self-weight of the deck. However, one of the shear component, dowel action, has not been adequately investigated in the past. In this dissertation, a particular test was designed and carried out to fully investigate the dowel action response, especially its contribution to shear resistance. In addition, research on serviceability and fatigue behaviors were expanded …