Architectural Engineering Commons^™

Chloride Binding Mechanism In Seawater-Mixed Uhpc, Wei Zhang, Dawei Ding, Mengmeng Li, Tiao Wang, Hongyan Ma, Binmeng Chen, Hongxing Hu, Jizhou Chen, Xiaomin Liu, Dongshuai Hou

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The rapid development of marine concrete structures and the sharp shortage of freshwater resources contribute to the wide investigation of seawater-mixed ultra-high-performance concrete (swuhpc). However, few studies have investigated the chloride ions (cl-) binding mechanism of swuhpc. Herein, the chloride binding experiments and molecular dynamics (md) simulation were carried out to reveal the physically and chemically bound cl- mechanisms of swuhpc. The results of the experiments clearly demonstrate that the addition of silica fume (sf) led to a significant decrease in the capacity of cl- binding. Conversely, the incorporation of metakaolin (mk) resulted in a marked increase in the content …

Urban Mixed Income, Mixed Use Transit Orientated Design A Precast Prefabricated Modular Design Solution To Atlanta's Housing Affordability Crisis, Taharka Askia Muhammad

Bachelor of Architecture Theses - 5th Year

This thesis will focus on urban housing affordability with an emphasis on quality mixed income, mixed use, transit orientated housing development (TOD). The primary goal is to provide an adequate number of affordable housing units to allow diversity and inclusion for residents of lower income in nearby communities or otherwise provide greater housing affordability overall. This research aims to propose new construction and creative innovations with precast, prefabricated modular architecture which will take advantage of cost offset strategies, lower cost of construction, efficiency, and speed of construction. The design phase of this thesis will develop a design proposal for the …

Safe Passage, Tenzin Senge

Bachelor of Architecture Theses - 5th Year

After the Cultural Revolution of 1959 in China which led to the occupation of Tibet, the people of Tibet suffered the loss of homes and were stripped away from their socio-cultural ethos. As displaced Tibetans, the next generations will grow up without a nation, their self-identity and live with uncertain future. To this day, thousands of Tibetans are fleeing into neighboring countries every year by crossing the treacherous (cold freezing) Himalayas mountains with great hardship, even the most experience hikers find this task challenging. Issues arise for these refugees trying to escape, and questions tend to pile up about the …

The Art Of Experience: Changing Architectural Designs Through The Perception Of Light, Brett Hembree

Bachelor of Architecture Theses - 5th Year

We are constantly surrounded by and inhabiting the built environment. Architecture can affect someone’s mood in the most subtle of ways. The spaces we inhabit have an impact whether you are aware of it or not. Peter Zumthor said, "Architecture is a service, a process, a way of building and leaving the world a little better for our presence." The question becomes, "How can we use lighting in architectural designs to create impactful experiences for those in the space?" My thesis explores how we design spaces and what strategies can be implemented to influence the viewers’ perception. We are shaped …

Raising The Green Roof: Enhancing Youth Water Literacy Through Built Environment Education, Laura B. Cole, Lilian Priscilla, Laura Zangori, Beth Kania-Gosche, Joel G. Burken

Teacher Education and Certification Faculty Research & Creative Works

Green Roofs Cool Cities, Clean the Air, Provide Habitat, and Manage Stormwater. They Are Compelling Tools to Teach Interconnected Human-Ecological Systems. This Study Included the Design, Pilot, and Evaluation of a Fourth-Grade Science Unit Entitled "Raising the Green Roof", Exploring These Connections. Five Classrooms in Two Midwestern U.S. Public Elementary Schools Participated, and 4th-Grade Students (N = 73) Drew Systems Models at Three Time Points (212 Models) and Wrote their Ideas. Qualitative Content Analyses of the Models Showed that Learners Were Increasingly Combining Social Systems (Green Roof Infrastructure) with Ecological Systems (Water Cycle) Across the Unit. Students Also Increasingly Evidenced …

Four-Way Cfd-Dem Coupling To Simulate Concrete Pipe Flow: Mechanism Of Formation Of Lubrication Layer, Tooran Tavangar, Masoud Hosseinpoor, Jeffrey S. Marshall, Ammar Yahia, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study introduced a four-way CFD-DEM coupling approach to simulate the shear-induced particle migration (SIPM) mechanism leading to formation of the lubrication layer (LL) during concrete pumping. The CFD-DEM simulations considered the coupled effect of concentration (10 %–40 %) and wide size distribution (1–17 mm) of aggregate and rheology of the mortar for forces between the suspending matrix and the particles (and vice versa), as well as force transmission directly between particles (and the pipe wall). The formation of the LL was successfully simulated through a more realistic understanding the SIPM mechanism and rheological evaluation across the pipe with comparable …

Utilizing Biomimicry To Design Sustainable Architecture, Virginia Hammond

Architecture Undergraduate Honors Theses

Nature has an integral relationship with architecture and serves as a sustainable role model and inspiration for designers. The process of biomimicry in architecture has the potential to produce more sustainable design solutions and foster a connection between humans and nature. Existing biomimetic design projects have varying strengths and weaknesses as examples of the process. Utilizing guidelines and references from key leaders in biomimetic design consultancy (Biomimicry 3.8), selected case studies are assessed for their ability to demonstrate the benefits of this design strategy. Using these evaluations, the case studies are diagrammed and critiqued to determine how new projects could …

Surface Coating Method For Cement-Based Materials To Improve Chloride Ion Penetration Resistance Using Amine-Based Co2 Solvent, Seongho Han, Tae Hoon Han, Jae Hong Kim

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The application of coatings on concrete surfaces serves as a protective shield, guarding the structure against chlorides and averting corrosion of the reinforcement, consequently enhancing its durability. This study investigates the resistance of cement mortar samples to chloride ion penetration when coated with an amine-based carbon dioxide (CO2) solvent. Various factors, including monoethanolamine (MEA) concentrations of 1, 10, and 30 wt.%; water-to-cement ratios (w/cm) of 0.35, 0.4, and 0.5; coating timings on day 3 and day 27; and pre-conditioning methods such as air drying, are investigated for their impact on the performance of chloride penetration resistance. Specifically, pre-conditioning significantly enhanced …

A Review Of Whipple Shield Ballistic Limit Equations, S. Ryan, W. (William) P. Schonberg

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Ballistic limit equations (BLEs) are semi-analytical expressions used to predict the risk posed by micrometeoroid and orbital debris (MMOD) impacts on a spacecraft. A foundational BLE, known as the new non-optimum (NNO) equation was published by Eric Christiansen of NASA Johnson Space Center in 1990 for application on Whipple shields – two-plate configurations consisting of a thin sacrificial plate located at some standoff in front of the spacecraft pressure hull or structural wall. Today, BLEs for almost all multi-plate spacecraft structures, e.g., honeycomb sandwich panels, monolithic structures with thermal insulation blankets, etc., are based on the NNO Whipple BLE. We …

Spatial Hearing In Simulated Reverberant Classroom Environments, Gabriel Seth Evan Weeldreyer

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

Spatial hearing provides access to auditory spatial cues that promote speech perception in noisy listening situations. However, reverberation degrades auditory spatial cues and limits listeners’ ability to utilize these cues for segregating target speech from competing babble. Hence, spatial unmasking—an intelligibility benefit from a spatial separation between a target and masker—is reduced in reverberant environments as compared to free field. This work tests the hypothesis that interaural decorrelation, the result of increasing reverberation, will broaden the perceived auditory source width with a cascading effect of reduced auditory spatial acuity and subsequently poorer spatial unmasking. To understand the perceptual consequences of …

Seasonal Comparison Of Air Quality Variables And Evaluation Of Carbon Dioxide And Particulate Measurement Period In Classrooms, Daud Nosham

Durham School of Architectural Engineering and Construction: Dissertations, Theses, and Student Research

Indoor air quality and thermal environmental variables were measured in 55 classrooms in the mid-western United States spanning a full academic year. The studied air quality and environmental factors included carbon dioxide, temperature, relative humidity, particle counts, air velocity, formaldehyde, total volatile organic compounds, carbon monoxide, nitrogen dioxide, and ozone.

Carbon dioxide and Particulate matter concentrations were measured for a four-day measurement period. Then one-day, two-day, and four-day occupied time average concentrations were calculated which were then compared statistically to figure out an appropriate measurement period for these air quality variables. Kruskal Wallis test and Wilcoxon test were used to …

Multihalle Pavilion: The Renovation Of An Innovative, Experimental Structure From The 1970s, Steffen Lehmann

Architecture Faculty Research

This article discusses the significance and challenges of renovating a unique 1970s experimental timber building and iconic structure: the Multihalle Pavilion in Mannheim (Germany), which has the world’s first and largest self-supporting wooden grid shell roof structure. Originally conceived as a temporary structure for the 1975 Federal Garden Exposition, Multihalle uses a lattice grid shell structure with gentle curves, remarkably slim profiles, and a translucent roof. The term ‘grid shell’ refers to a doubly curved surface formed from the lattice of timber with uniform spacing in two directions. Furthermore, this was one of the first buildings in Germany whose plan …

Education And Advocacy For Universal Design And Accessibility In Housing, Apisara Vairojanakich, Amy Lyons-Brown, Molly Wuebker

Spring 2024 Virtual OTD Capstone Symposium

In the United States, there is a lack of adequate numbers of universally designed and accessible houses in the housing market for the older population and people with disabilities. Many barriers, such as financial support and lack of knowledge for housing-related professionals, can prevent this population from participating in home occupations. The project developed educational products, including the universal design housing experience booklet, universal design housing checklist, and universal design blueprints. These products were delivered through the blog post on Uncurbed LinkedIn website. The needs assessment was conducted to provide the guidelines for the chapters in the booklet and checklist. …

Using Virtual Reality Technologies In Built Environment Education, Rebekah Floyd, Kayla Walters, Stuart Werner Baur

Undergraduate Research Conference at Missouri S&T

Virtual reality (VR) offers transformative potential in built environment education, including human-made surroundings like buildings and infrastructure. This review explores VR's benefits, challenges, and trends in this field. VR fosters immersive learning, allowing students to explore architectural designs and urban planning scenarios. It provides hands-on experiences, enhancing spatial understanding and critical thinking. Simulations enable safe experimentation with design ideas and construction techniques without the real-life limitations or risk holding students back. However, challenges include high costs, technical limitations, and the need for educator training. Ensuring accessibility for all students is crucial. Despite challenges, VR's potential to revolutionize built environment education …

Analyzing The Viability Of Novel Reactor Technology, Auston Obsuth

Undergraduate Research Conference at Missouri S&T

This study explores an innovative anaerobic digestion reactor technology aimed at improving the sustainability and efficiency of organic waste management. By employing a system without mechanical parts, it seeks to significantly enhance energy conversion from waste, tackling waste accumulation and the need for renewable energy sources. The project will use a multidisciplinary approach, incorporating economics, engineering management, and environmental science, to thoroughly evaluate the reactor's performance in terms of gas production, stability, and efficiency. Additionally, it will assess the economic viability and environmental impact, emphasizing advantages such as waste reduction and decreased greenhouse gas emissions. Additionally, preliminary market analysis and …

Effects Of Rest Time And Curing Regime On Short- And Long-Term Strength Of Class C Fly Ash-Based Alkali-Activated Mortars, Cedric Kashosi, Ahmed Gheni, Eslam Gomaa, Mohamed Elgawady

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study investigated how different rest times affect the strength development of fly-ash-based alkali-activated mortar (aam) over a period of 90 days. Two types of fly ash with varying calcium oxide contents of 37 and 21% were used. The rest times ranged from 2 to 36 h, and three curing methods (ambient, oven, and steam) were tested. The results showed that the rest time significantly influenced the compressive strength of the aam. The optimal rest time was found to be between 12 and 30 h depending on the curing method and fly ash type. Beyond this range, there were only …

Improving Early Design Processes With The Use Of Bim And Vr Technologies In The Gcc Construction Industry, Mohamed Wahid Mohamed

Theses

The early stages of construction projects play a crucial role in determining the outcome of the entire project life cycle. However, conventional early design practices have been facing significant challenges and limitations in recent times. These challenges include a lack of coordination among various disciplines, communication gaps, and poor decision-making. Unfortunately, these challenges often lead to increased costs, project delays, and change orders. To tackle these challenges, it is essential to adopt the latest technological advancements in the construction industry. This is especially important given the complexity of modern construction projects and the rapid construction growth. One of the most …

For Students, By Students: A Python Programming Manual For Structural Engineering Courses, Anahid Behrouzi, Kennedy Gomez, Aaron Dewey, Meileen Yee

Architectural Engineering

Learning to program is challenging enough for structural engineering students without the complexity of using a textbook with examples from unfamiliar engineering and scientific fields. Moreover, the open-source nature of Python means each library has a separate documentation website to navigate, discern what functions are useful, and how to implement them.

The idea of a senior project to develop a Python manual tailored to structural engineering students came from the authors’ experiences in three structural analysis/dynamics computing labs in Cal Poly in San Luis Obispo’s architectural engineering (ARCE) curriculum. The team recognized the barriers, lack of confidence, and frustration that …

Building For Safety: Design Considerations For Refuge Areas In Tall Buildings From Quality Management Perspective, Enass. A. Salama, Heba. M. Gaber, Ahmed. M. Selim

Journal of Engineering Research

New El Alamein City is one of the largest urban projects in Egypt, and the largest project on the north coast. Tall buildings (super high-rise buildings) are considered the prevailing trend by architectural designers to obtain the maximum view of the Mediterranean Sea. The provision of safety evacuation in emergencies for these buildings’ occupants is a crucial challenge from the Quality management point of view. In contrast, there are no sufficient architectural design guidelines for the tall buildings provided by the Egyptian code for protecting buildings from fire, especially the design of the refuge areas. This study aims to investigate …

Impact Of Mega Projects Construction On Surrounding Traffic - A Case Study Of The Oncology Institute, Rania Abdo, Huda Soliman Seddiq, Walaa Ahmed Nour Prof, Bahaa El-Boshy

Journal of Engineering Research

The adverse effects of traffic on the quality of life have become undeniable, with congestion, noise, and pollution significantly impacting urban environments. Large construction projects risk exacerbating existing traffic problems or creating new ones without proper traffic planning and management. Notably, most existing studies predominantly concentrate on the post-construction phase of buildings, neglecting the broader temporal spectrum of project development. The importance of traffic studies is further underscored as they provide a proactive framework for planners, policymakers, and developers. By delving into the nuances of traffic impact during the entire project lifecycle, this research, instead of our research, not only …