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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 ...


My Catalyst, Gabrielle Gambino Lyon 2018 Augustana College, Rock Island Illinois

My Catalyst, Gabrielle Gambino Lyon

Celebration of Learning

Over the course of my internship and shadow program with Pepper Lawson Construction and Ziegler Cooper Architects, I was able to explore the various career paths involved in the design, construction, and civil engineering fields. My work on the construction site of a high-rise apartment building located in the heart of Houston, TX allowed me first-hand experience working and learning alongside project engineers, contractors, building developers, and the construction team.

This project was the perfect confluence of my main areas of interest: structural, mechanical, civil, and environmental engineering, as well as architecture. My daily work consisted of on-site walk throughs ...


Hydronic Heated Pavement System Using Precast Concrete Pavement For Airport Applications, Hesham Abdualla, Halil Ceylan, Sunghwan Kim, Peter C. Taylor, Kasthurirangan Gopalakrishnan, Kristen Cetin 2018 Iowa State University

Hydronic Heated Pavement System Using Precast Concrete Pavement For Airport Applications, Hesham Abdualla, Halil Ceylan, Sunghwan Kim, Peter C. Taylor, Kasthurirangan Gopalakrishnan, Kristen Cetin

Civil, Construction and Environmental Engineering Conference Presentations and Proceedings

The use of deicing chemical has the potential to cause environmental and safety concerns and pavement deterioration. Hydronic heated pavement systems (HHPS) have been widely used to melt or prevent ice and snow accumulation on paved surfaces. HHPS uses heated fluid circulated through pipes embedded in the concrete pavement to warm the surface of the concrete. The objective of this study is to develop a conceptual design framework and construction guidance for large-scale HHPS using precast concrete pavement (PCP) technology to expedite construction work and minimize air travel disruption. The detailed design and 3-D visualization of construction procedures has been ...


Investigating The Heat Generation Efficiency Of Electrically-Conductive Asphalt Mastic Using Infrared Thermal Imaging, Ali Arabzadeh, Halil Ceylan, Sunghwan Kim, Alireza Sassani, Kasthurirangan Gopalakrishnan 2018 Iowa State University

Investigating The Heat Generation Efficiency Of Electrically-Conductive Asphalt Mastic Using Infrared Thermal Imaging, Ali Arabzadeh, Halil Ceylan, Sunghwan Kim, Alireza Sassani, Kasthurirangan Gopalakrishnan

Civil, Construction and Environmental Engineering Conference Presentations and Proceedings

One of the emerging technologies for producing sustainable ice-and snow-free pavements is the use of electrically-conductive surface courses, e.g., electrically-conductive asphalt concrete (ECAC) that can melt ice and snow through resistive heating. Modifying the mastic in asphalt concrete with electrically-conductive materials is a promising approach for producing high-quality ECAC. The objective of this study is to evaluate electrical conductivity and heat generation efficiency of electrically-conductive asphalt mastic (ECAM) specimens at a below-freezing temperature—simulating the harsh weather conditions in North America during the wintertime. To this end, asphalt mastic was electrically modified with carbon fiber (CF) at varying volume ...


Abraham, John E., 1844-1925 (Sc 3233), Manuscripts & Folklife Archives 2018 Western Kentucky University

Abraham, John E., 1844-1925 (Sc 3233), Manuscripts & Folklife Archives

MSS Finding Aids

Finding aid only for Manuscripts Small Collection 3233. Letter, 8 March 1886, of John E. Abraham, Beattyville, Kentucky, to Captain Thomas J. Hardin, Monterey, Kentucky. He discusses timber transactions and meeting with a supplier of stone in connection with a bid to construct dikes on the Ohio River.


Impact Of Pavement Surface Condition On Roadway Departure Crash Risk In Iowa, Ahmad Alhasan, Inya Nlenanya, Omar G. Smadi, Cameron A. MacKenzie 2018 Iowa State University

Impact Of Pavement Surface Condition On Roadway Departure Crash Risk In Iowa, Ahmad Alhasan, Inya Nlenanya, Omar G. Smadi, Cameron A. Mackenzie

Industrial and Manufacturing Systems Engineering Publications

Safety performance is a crucial component of highway network performance evaluation. Besides their devastating impact on roadway users, traffic crashes lead to substantial economic losses on both personal and societal levels. Due to the complexity of crash events and the unique conditions in each country and state, empirical local calibration for the correlation between attributes of interest and the safety performance is always recommended. Limited studies have established a procedure to analyze the impact of pavement condition on traffic safety in a risk analysis scheme. This study presents a thorough analysis of some roadway departure crashes which occurred in Iowa ...


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 ...


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 ...


Solar And Rain Catching Canopy. Urban Oasis, Afolabi Ibitoye, Langston Clark, Elena Zimareva, Evan Banks, Alexander Aptekar 2018 CUNY New York City College of Technology

Solar And Rain Catching Canopy. Urban Oasis, Afolabi Ibitoye, Langston Clark, Elena Zimareva, Evan Banks, Alexander Aptekar

Publications and Research

The Urban Oasis is designed to work within existing “pocket parks” in New York City as a combined rainwater collector, personal electronics charging station and resting designation for New Yorkers. Intended to not only lessen the demand on the city power grid by using renewable energy to charge devices, the urban oasis is also intended to mitigate grey water overfill in New York’s combined sewer system and, in general, serve as a model for responsible environmental stewardship in urban areas.

The important technical aspects of the canopy specifically analyzed were:

a) how much rainwater could the canopy be expected ...


Archaeology And Conservation Of The Middle Phrygian Gate Complex At Gordion, Turkey, Semih Gönen, Richard F. Liebhart, Naomi F. Miller, Elspeth Dusinberre 2018 Boğaziçi Üniversitesi

Archaeology And Conservation Of The Middle Phrygian Gate Complex At Gordion, Turkey, Semih Gönen, Richard F. Liebhart, Naomi F. Miller, Elspeth Dusinberre

Classics Faculty Contributions

In 2016, a project was undertaken at Gordion, Turkey, to stabilize and conserve the remains of a rubble platform built early in the Middle Phrygian period (ca. 800–700 b.c.e.) under the vast Gate Complex leading to the megarons on the Citadel Mound. In the process, aspects of Middle Phrygian building strategies came to light that enhanced our understanding gained from the original excavation in the 1950s. This article outlines the archaeology of the Middle Phrygian Gate Complex and the sophisticated internal structures that lent stability to the rubble platform upon which it was built, and examines the ...


An Engineer’S Rules For Running A Business, Singapore Management University 2018 Singapore Management University

An Engineer’S Rules For Running A Business, Singapore Management University

Perspectives@SMU

Peter Ho sold everything he had to make his business a success; 10 rules guide his thinking

On a lobby wall of Singapore engineering firm HOPE Technik are 10 company rules that set the organisational tone. Co-founder and CEO Peter Ho describes them as “very personal”, none perhaps more so than the first two:

1. It is a passion and a career, not a job.

2. We are engineering commandos. Small in number, strong in force.


Effects Of Tension On Resonant Frequencies Of Strings, Blake Burnett 2018 Linfield College

Effects Of Tension On Resonant Frequencies Of Strings, Blake Burnett

Senior Theses

This project tests and explores resonance of strings. Since all materials and mechanisms are affected by vibrations, it is important to know the frequencies at which resonance occurs. To explore this subject, strings were used as a model material to test the effect tension has on resonance. The fundamental frequencies and the corresponding modes of resonance were used to analyze the data. The results of this experiment show that increasing tension on a string increases its resonance frequency. Understanding the physics behind resonance frequency allows systems to be designed to take advantage of resonance properties, or to avoid resonance where ...


A Study On Residential Construction Energy Code Compliance In Nebraska, Aaron Thompson 2018 University of Nebraska - Lincoln

A Study On Residential Construction Energy Code Compliance In Nebraska, Aaron Thompson

Construction Systems -- Dissertations & Theses

Energy codes are easy to implement, but how effectively are they being followed? To determine energy code compliance of residential construction in Nebraska, a study was conducted in which seven key areas having the most effect on energy savings were analyzed. The study examined both urban and rural areas of the state and compared Nebraska to other states’ energy code compliance studies. The study found an eighty-eight percent average compliance in the key areas. Urban areas tended to be more compliant than rural areas. Nebraska is comparative in energy code compliance to other states. Yet, the state of Nebraska, code ...


Impact Of Owners’ Early Decisions On Project Performance And Dispute Occurrence In Public Highway Projects, Sogand Hasanzadeh, Behzad Esmaeili, Ghada M. Gad, Douglas D. Gransberg 2018 University of Nebraska - Lincoln

Impact Of Owners’ Early Decisions On Project Performance And Dispute Occurrence In Public Highway Projects, Sogand Hasanzadeh, Behzad Esmaeili, Ghada M. Gad, Douglas D. Gransberg

Civil, Construction and Environmental Engineering Publications

Disputes are common in the construction industry and lead to unnecessary cost and schedule overruns in projects. It is commonly believed that owners’ early decisions regarding the selection of delivery methods, procurement methods, and contract types affect the frequency and severity of project disputes; however, no previous study has empirically tested this hypothesis, particularly in highway public projects. Therefore, this study empirically investigated the effect of owners’ early decisions regarding project organization (i.e., delivery methods, procurement, and contract types) on performance measures (e.g., cost and schedule growth), specifically dispute performance metrics (e.g., frequency and severity of disputes ...


Social Contagion And Knowledge Acquisition In Construction Professional Service Firms, Oluwasegun O. Seriki, Roisin Murphy 2018 Dublin Institute of Technology

Social Contagion And Knowledge Acquisition In Construction Professional Service Firms, Oluwasegun O. Seriki, Roisin Murphy

Conference papers

The construction industry in Ireland, including professional service firms (PSF’s) operating therein, are undergoing a period of change and uncertainty driven by economic, demographic, political and technological factors. While considerable evidence exists demonstrating the relationship between environmental turbulence on organisational decision making, there remains a distinct lack of focus on behavioural patterns affecting decision-making process of construction firms. Social contagion (SC) theory asserts that the spread of ideas, attitudes, or behaviour patterns in a group is achieved through imitation and conformity, and is well established within social sciences research, and is increasingly being used to analyse organisational behaviour. However ...


Solar Water-Heating In The Developing World, Raymond Gomez, Kellen Miller 2018 Carroll College

Solar Water-Heating In The Developing World, Raymond Gomez, Kellen Miller

Carroll College Student Undergraduate Research Festival

We designed a solar heating system for an elderly home in Saint Lucia. St. Lucia is a Caribbean island-country with abundant rainfall. We worked with EWB to design a system that provides sufficient hot rainwater to the laundry facility. Free hot water is a great resource.


Industry Requirement Gap Analysis For Sustainable Construction Technology, Parya Nickbeen 2018 University of New Mexico - Main Campus

Industry Requirement Gap Analysis For Sustainable Construction Technology, Parya Nickbeen

Civil Engineering ETDs

As sustainable construction becomes a standard necessity in the construction industry, construction engineering and management programs seek to integrate sustainable construction concepts and skills into their degree programs. The aim of this research is to identify industry-required competencies and recognize the possible gaps between industry skills demands and the education provided by academia for sustainable construction technologist jobs. In this study, industry requirements for sustainable construction technologist (mid-level) positions were identified through the analysis of job advertisements, literature review, job analysis (i.e., Developing a Curriculum-DACUM- process), and surveys. Results from the DACUM process provided a categorization of 4 main ...


An Embedded Sensory System For Worker Safety: Prototype Development And Evaluation, Chunhee Cho, Jee Woong Park 2018 University of Nevada, Las Vegas

An Embedded Sensory System For Worker Safety: Prototype Development And Evaluation, Chunhee Cho, Jee Woong Park

Civil & Environmental Engineering and Construction Faculty Publications

At a construction site, workers mainly rely on two senses, which are sight and sound, in order to perceive their physical surroundings. However, they are often hindered by the nature of most construction sites, which are usually dynamic, loud, and complicated. To overcome these challenges, this research explored a method using an embedded sensory system that might offer construction workers an artificial sensing ability to better perceive their surroundings. This study identified three parameters (i.e., intensity, signal length, and delay between consecutive pulses) needed for tactile-based signals for the construction workers to communicate quickly. We developed a prototype system ...


Development Of A Computational Framework For Big Data-Driven Prediction Of Long-Term Bridge Performance And Traffic Flow, In Ho Cho, An Chen, Alice Alipour, Behrouz Shafei, Simon Laflamme, Ikkyun Song, Jin Yan 2018 Iowa State University

Development Of A Computational Framework For Big Data-Driven Prediction Of Long-Term Bridge Performance And Traffic Flow, In Ho Cho, An Chen, Alice Alipour, Behrouz Shafei, Simon Laflamme, Ikkyun Song, Jin Yan

InTrans Project Reports

Consistent efforts with dense sensor deployment and data gathering processes for bridge big data have accumulated profound information regarding bridge performance, associated environments, and traffic flows. However, direct applications of bridge big data to long-term decision-making processes are hampered by big data-related challenges, including the immense size and volume of datasets, too many variables, heterogeneous data types, and, most importantly, missing data. The objective of this project was to develop a foundational computational framework that can facilitate data collection, data squashing, data merging, data curing, and, ultimately, data prediction. By using the framework, practitioners and researchers can learn from past ...


Industry Perspectives On The 40-Hour Work Week As It Relates To Overtime In The Pacific Northwest, John S. Korsmo III 2018 California Polytechnic State University, San Luis Obispo

Industry Perspectives On The 40-Hour Work Week As It Relates To Overtime In The Pacific Northwest, John S. Korsmo Iii

Construction Management

The construction industry has a stigma for construction projects often being behind schedule, delayed, or delivered late. Many projects that find themselves in this predicament will utilize overtime to make up for the loss in schedule. However, a number of published studies shows evidence that extended overtime produces a decrease in labor productivity. Does the structure of the 40-hour work week have an affect on this loss of production with overtime? This paper will examine the structure of the 40-hour work week with an emphasis on a 4-day, 10-hour day schedule as well as overtime productivity. This study explores the ...


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