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On Thermal Bowing Of Concrete Sandwich Wall Panels With Flexible Shear Connectors, Fray Pozo 2018 Utah State University

On Thermal Bowing Of Concrete Sandwich Wall Panels With Flexible Shear Connectors, Fray Pozo

All Graduate Theses and Dissertations

Thermal bowing, often referred as bulging or out-of-plane wall deflection, is a common issue on sandwich panel walls caused by a temperature differential between a building interior temperature and the environment. The stresses caused by temperature changes in concrete members are widely known in the practice of bridge design, but not on sandwich wall panels. For sandwich wall panel applications, it is common to have non-composite panels when the designer expects a high temperature gradient, what yields a less economical design, but reduces the bowing.

This project aimed to validate current assumptions regarding the heat flow in sandwich wall panels ...


Input Space Dependent Controller For Civil Structures Exposed To Multi-Hazard Excitations, Liang Cao, Simon Laflamme, Jonathan Hong, Jacob Dodson 2018 Lehigh University

Input Space Dependent Controller For Civil Structures Exposed To Multi-Hazard Excitations, Liang Cao, Simon Laflamme, Jonathan Hong, Jacob Dodson

Civil, Construction and Environmental Engineering Publications

A challenge in the control of civil structures exposed to multiple types of hazards is in the tuning of control parameters to ensure a prescribed level of performance under substantially different excitation dynamics, which could be considered as largely uncertain. A solution is to leverage data driven control algorithms, which, in their adaptive formulation, can self-tune to uncertain environments. The authors have recently proposed a new type of data-driven controller, termed input space dependent controller (ISDC), that has the particularity to adapt its input space in real-time to identify key measurements that represent the essential dynamics of the system. Previous ...


Formal And Informal Undergraduate Ethics Education In Engineering, Grace Ports 2018 University of Dayton

Formal And Informal Undergraduate Ethics Education In Engineering, Grace Ports

Undergraduate Voices

This literature review attempts to answer the question of whether formal education or informal education of ethics within civil engineering is more beneficial. If there is a lack of structured education of ethics in civil engineering, then another area of interest is to discover where engineers are being informally educated. Another area of inquiry is whether it is more beneficial to teach engineers ethics prior to the time when they are required to study the code of ethics for their certification exam, or should engineers wait until moments before the exam to study the code. This article examines the potential ...


An Experimental Test Bed For Developing High-Rate Structural Health Monitoring Methods, Bryan Joyce, Jacob Dodson, Simon Laflamme, Applied Research Associates 2018 University of Dayton Research Institute

An Experimental Test Bed For Developing High-Rate Structural Health Monitoring Methods, Bryan Joyce, Jacob Dodson, Simon Laflamme, Applied Research Associates

Civil, Construction and Environmental Engineering Publications

Complex, high-rate dynamic structures, such as hypersonic air vehicles, space structures, and weapon systems, require structural health monitoring (SHM) methods that can detect and characterize damage or a change in the system’s configuration on the order of microseconds. While high-rate SHM methods are an area of current research, there are no benchmark experiments for validating these algorithms. This paper outlines the design of an experimental test bed with user-selectable parameters that can change rapidly during the system’s response to external forces. The test bed consists of a cantilever beam with electronically detachable added masses and roller constrains that ...


Development Of Carbon Fiber-Modified Electrically Conductive Concrete For Implementation In Des Moines International Airport, Alireza Sassani, Halil Ceylan, Sunghwan Kim, Ali Arabzadeh, Peter C. Taylor, Kasthurirangan Gopalakrishnan 2018 Iowa State University

Development Of Carbon Fiber-Modified Electrically Conductive Concrete For Implementation In Des Moines International Airport, Alireza Sassani, Halil Ceylan, Sunghwan Kim, Ali Arabzadeh, Peter C. Taylor, Kasthurirangan Gopalakrishnan

Civil, Construction and Environmental Engineering Publications

This paper reports on the procedures of mix design preparation, production, placement, and performance evaluation of the first electrically conductive concrete (ECON) heated-pavement system (HPS) implemented at a U.S. airport. While ECON has drawn considerable attention as a paving material for multi-functional pavements, including HPS, the majority of ECON HPS applications and studies have been limited to laboratory scale or include materials/methods that do not conform to regulations enforced by airfield construction practices. Carbon fiber-reinforced ECON provides a promising prospective for application in airfield pavements. In this study, ECON mixtures were prepared in the laboratory using varying cementitious ...


Technology, Civic Engagement And Street Science: Hacking The Future Of Participatory Street Design In The Era Of Self-Driving Cars., William W. Riggs 2018 California Polytechnic State University - San Luis Obispo

Technology, Civic Engagement And Street Science: Hacking The Future Of Participatory Street Design In The Era Of Self-Driving Cars., William W. Riggs

William W. Riggs

Emerging technologies are fundamentally changing how we plan, develop, and manage our cities. Given trends of increasing mobile use, local governments are being required to adopt and use new technologies to plan, communicate and engage with citizens. In this context, this study then hypothesizes how technology trends will continue to impact planning and local government using the case of the participatory planning application ReStreet.comapp.restreet.com), a tool for visioning the future of streets in a future of autonomous or self-driving vehicles. While other work has detailed the importance of technology in the participatory process, this tool provides an ...


Risk Assessment Of Concrete Gravity Dams Under Earthquake Loads, Ufuk Sen 2018 Louisiana State University and Agricultural and Mechanical College

Risk Assessment Of Concrete Gravity Dams Under Earthquake Loads, Ufuk Sen

LSU Master's Theses

Dams are important structures to supply water for irrigation or drinking, to control flood, and to generate electricity. In seismic regions, the structural safety of concrete gravity dams is important due to the high potential of life and economic loss if they fail. Therefore, the seismic analysis of existing dams in seismically active regions is very crucial to predict responses of dams to ground motions. In this thesis, earthquake response of concrete gravity dams is investigated using the finite element (FE) method. The selected dam is the Pine Flat Dam which is located in the Central Valley of Fresno County ...


A Survey Of Ride-Hailing Passengers, Steven Gehrke 2018 Boston Metropolitan Area Planning Council

A Survey Of Ride-Hailing Passengers, Steven Gehrke

TREC Friday Seminar Series

In less than a decade, the ride-hailing industry, led by Uber and Lyft, has dramatically transformed the way we travel in our metro regions. Rider adoption of these on-demand mobility services has proceeded much quicker than our understanding of their impacts to our urban transportation systems. Planning for this transformation in personal mobility, which will have unintended consequences, has been made more difficult by the scarcity in meaningful data made available by these ride-hailing companies. Public agencies responsible for managing congestion and transit services are hindered in their ability to successfully plan for the integration of this emergent travel mode ...


Role Of Zero Valent Iron And Organic Substrates In Chlorinated Solvent Degradation: An Ex-Situ Remediation Case Study, Alexander Stevenson 2018 The University of Western Ontario

Role Of Zero Valent Iron And Organic Substrates In Chlorinated Solvent Degradation: An Ex-Situ Remediation Case Study, Alexander Stevenson

Electronic Thesis and Dissertation Repository

Field practice suggests that a combination of biotic and abiotic technologies to treat soil impacted by chlorinated solvents positively influences a remediation project’s success rate. Two large remediation programs have used a material containing both zero-valent iron (ZVI) and a dry organic substrate to abiotically reduce contaminants and increase anaerobic bioremediation in soil contaminated with tetrachloroethylene and 1,2-dichloroethylene using ex-situ mixing techniques. This research assesses the contributions made by the dry organic substrate and ZVI to the observed changes in chlorinated solvent concentrations by analyzing field samples collected from the sites previously remediated, as well as conducting bench-scale ...


Analyzing A Small-Scale, Constructed Wetland For Stormwater Treatment, Juliann Apple, Pascal Schlee 2018 Rose-Hulman Institute of Technology

Analyzing A Small-Scale, Constructed Wetland For Stormwater Treatment, Juliann Apple, Pascal Schlee

Rose-Hulman Undergraduate Research Publications

Stormwater treatment by means of constructed wetlands has the ability to effectively remove pollutants such as total suspended solids, nitrite, nitrate, and ammonia. Utilizing two small, lab-scale constructed wetlands, one free water flow system and one subsurface flow system, our research team analyzed the levels of these pollutants at different locations in the wetland. Our team of two Civil and Environmental Engineering undergraduate students tested a variety of different water samples including tap water, stormwater, and a high nitrate solution. A consistent decrease in nitrate and nitrite was observed throughout the systems. While there was not an overall decrease in ...


Bmptrains User Manual V8.6, Rich Magee 2018 UCF Stormwater Management Academy

Bmptrains User Manual V8.6, Rich Magee

BMP Trains

No abstract provided.


Radical Social Ecology As Deep Pragmatism: A Call To The Abolition Of Systemic Dissonance And The Minimization Of Entropic Chaos, Arielle Brender 2018 Fordham University

Radical Social Ecology As Deep Pragmatism: A Call To The Abolition Of Systemic Dissonance And The Minimization Of Entropic Chaos, Arielle Brender

Student Theses 2015-Present

This paper aims to shed light on the dissonance caused by the superimposition of Dominant Human Systems on Natural Systems. I highlight the synthetic nature of Dominant Human Systems as egoic and linguistic phenomenon manufactured by a mere portion of the human population, which renders them inherently oppressive unto peoples and landscapes whose wisdom were barred from the design process. In pursuing a radical pragmatic approach to mending the simultaneous oppression and destruction of the human being and the earth, I highlight the necessity of minimizing entropic chaos caused by excess energy expenditure, an essential feature of systems that aim ...


Long Term Bathymetry Changes In The Lower Mississippi River Due To Variability In Hydrograph And Variable Diversion Schemes, Nina J. Reins 2018 University of New Orleans

Long Term Bathymetry Changes In The Lower Mississippi River Due To Variability In Hydrograph And Variable Diversion Schemes, Nina J. Reins

University of New Orleans Theses and Dissertations

This research is part of an ongoing effort to improve predictions for bathymetric and morphological changes in the Lower Mississippi River. The utilized model is a subset of a previously calibrated Delft3D model. This shorter model has reduced computational time, and can be deployed for analysis focused on the area between Belle Chasse and HOP, which is the domain of the model. Simulation runs conducted under this study vary from 12 years to 48 years, utilizing a developed 12-year variable hydrograph.

The comparison of variable annual hydrograph and repeated representative annual (uniform) hydrograph input data on bathymetric changes indicated that ...


Planning Of Fast-Charging Stations For A Battery Electric Bus System Under Energy Consumption Uncertainty, Zhaocai Liu, Ziqi Song, Yi He 2018 Utah State University

Planning Of Fast-Charging Stations For A Battery Electric Bus System Under Energy Consumption Uncertainty, Zhaocai Liu, Ziqi Song, Yi He

Civil and Environmental Engineering Faculty Publications

Battery-powered electric buses are gaining popularity as an energy-efficient and emission-free alternative for bus fleets. However, battery electric buses continue to struggle with concerns related to their limited driving range and time-consuming recharging processes. Fast-charging technology, which utilizes dwelling time at bus stops or terminals to recharge buses in operation employing high power, can raise battery electric buses to the same level of capability as their diesel counterparts in terms of driving range and operating time. To develop an economical and effective battery electric bus system using fastcharging technology, fast-charging stations must be strategically deployed. Moreover, due to the instability ...


Fundamental Studies Of Solid-Fuel Combustion Using A Two-Stage Flat-Flame Burner, Adewale Ayodeji Adeosun 2018 Washington University in St. Louis

Fundamental Studies Of Solid-Fuel Combustion Using A Two-Stage Flat-Flame Burner, Adewale Ayodeji Adeosun

Engineering and Applied Science Theses & Dissertations

Innovative coal technologies are essential for addressing concerns about air pollution and global climate change. A key pathway to advancing these technologies is through developing a thorough understanding of the fundamental physical and chemical processes that occur during coal combustion. Ignition influences many aspects of coal combustion, including flame stability, submicron aerosol evolution, and char burnout. As important as ignition and these associated processes are, they are challenging to study because they depend on many factors, such as the combustion environment, particle size, and particle-particle interactions.

While there have been many studies of coal ignition, none have studied the process ...


Making Strides: State Of The Practice Of Pedestrian Forecasting In Regional Travel Models, Patrick A. Singleton, Joseph C. Totten, Jaime P. Orrego-Oñate, Robert J. Schneider, Kelly J. Clifton 2018 Utah State University

Making Strides: State Of The Practice Of Pedestrian Forecasting In Regional Travel Models, Patrick A. Singleton, Joseph C. Totten, Jaime P. Orrego-Oñate, Robert J. Schneider, Kelly J. Clifton

Civil and Environmental Engineering Faculty Publications

Much has changed in the 30 years since non-motorized modes were first included in regional travel demand models. As interest in understanding behavioral influences on walking and policies requiring estimates of walking activity increase, it is important to consider how pedestrian travel is modeled at a regional level. This paper evaluates the state of the practice of modeling walk trips among the largest 48 metropolitan planning organizations (MPOs) and assesses changes made over the last 5 years. By reviewing model documentation and responses to a survey of MPO modelers, this paper summarizes current practices, describes six pedestrian modeling frameworks, and ...


Ewb-Wyo Comunidad Maya Water Distribution System Design, Brandon Wilde, Nick Blume, Presleigh Hayashida, Tristan McKenzie 2018 University of Wyoming

Ewb-Wyo Comunidad Maya Water Distribution System Design, Brandon Wilde, Nick Blume, Presleigh Hayashida, Tristan Mckenzie

Honors Theses AY 17/18

For the past five years, the University of Wyoming chapter of Engineers Without Borders (EWB-WYO) has worked with a small community in Guatemala to renovate the town’s water distribution system. Comunidad Maya receives its water supply from two spring box systems installed in nearby hills, but has suffered lately from insufficient water delivery. EWB-WYO has sent multiple teams to analyze the predicament from various angles and to ascertain the primary causes of the water shortage. These trips have been followed by periods of design and redesign, as EWB-WYO has sought the best long-term solution for the community.

In recent ...


City Of Tyler Hub-And-Spoke Bicycle Lane Network, Pedro A. Zavagna 2018 University of Texas at Tyler

City Of Tyler Hub-And-Spoke Bicycle Lane Network, Pedro A. Zavagna

Civil Engineering Theses

The purpose of this study is to showcase the up-to-date development of a Bicycle Lane Engineered Scoring System (BLESS) that will be utilized to map and identify the optimum feasible locations for bicycle lanes. The project was initiated for the City of Tyler, Texas where a Hub-and-Spoke bicycle lane will be designed around the city utilizing the BLESS. The design process is comprised of attentive planning, progressive development and a collective effort by the transportation engineering research team at the University of Texas at Tyler to design an exceptional bicycle lane network. The BLESS consisted of traffic analysis, lane configuration ...


Utah Salt Storage Facilities Guidelines And Best Management Practices, Weston Bellon 2018 Utah State University

Utah Salt Storage Facilities Guidelines And Best Management Practices, Weston Bellon

All Graduate Plan B and other Reports

An environmental analysis was conducted at the Utah Water Research Laboratory of samples gathered from Utah Department of Transportation (UDOT) salt storage facilities retention ponds across the state. The analysis indicated high levels of TSS largely made up of minerals directly associated with the deicing solution currently used by UDOT in roadway applications. As a companion to that analysis, best management practices have been identified and compiled to provide a resource for the proper management of salt storage facilities in the state of Utah. Topics included as best management practices include locating new storage facilities, proper salt storage, proper salt ...


Analysis Of The Contribution Of Transportation And Land Use To Citizen Perceptions Of Livability, Rebecca Lewis 2018 University of Oregon

Analysis Of The Contribution Of Transportation And Land Use To Citizen Perceptions Of Livability, Rebecca Lewis

TREC Friday Seminar Series

What is livability? How does the built environment influence resident perceptions of livability? Although livability is a broadly used term and a key goal in land use and transportation plans at the state level, it is unclear whether residents think their neighborhoods are livable and what contributes to their perception of livability. The purpose of the project was to understand how Oregonians, in neighborhoods of varying densities and within Metropolitan Planning Organizations (MPOs), perceive livability at the nexus of transportation and land use. We sought to understand how residents define and perceive livability in three different MPOs in the state ...


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