Architecture Commons^™

Coupled Effect Of Fiber Type And Reinforcement Ratio On Flexural Behavior Of Reinforced Beams Cast With Super Workable Concrete, Jingjie Wei, Le Teng, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study investigated the effect of 5-dimensional hooked-end fiber (5D) on the structural performance of beams and compared its efficiency with other fibers in strengthening structural performance of reinforced concrete (RC) beams with an increase in reinforcement ratio (ρ). The potential of using fibers to reduce the longitudinal rebar based on various design criteria was investigated. The fibers included 5D, a combination of 80 % 3-dimensional hooked-end and 20 % short steel fibers (STST), and two combinations of macro synthetic fibers A and B (MSF). Experimental results indicated that, compared to non-fibrous beams, using 5D was the most efficient in …

Effect Of Superabsorbent Polymer On 3d Printing Characteristics As Rheology-Modified Agent, Yu Cun Gu, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study aims to investigate the effects of two superabsorbent polymer (SAP) types, S1 and S2 (with continual absorption and rapid desorption, respectively) as rheology-modified agent on 3D printing characteristics. Three base mixtures were selected with different thixotropic behaviors (i.e., mixtures with high re-flocculation (τfloc), high structuration rate (Athix), and both low τfloc and Athix, respectively). The initial mini-slump flow of 190±10 mm was secured by adjusting superplasticizer (SP) or water demand (increasing w/b by either 0.025 or 0.05). An extrudable region was determined within the range of τfloc (200-890 Pa) and Athix (15-60 Pa/min). The use of the S2 …

Simulation Of Calcium Carbonate Nucleation Processes In Confined C-S-H Nanopores With Different Calcium-Silicon Ratios, Jiao Yu, Kerui Wang, Peixuan Yang, Mengmeng Li, Biqin Dong, Zuquan Jin, Shuxian Hong, Hongyan Ma

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Carbonation curing technology plays an important role in carbon cycling and improving the properties of cement-based materials, while the nucleation and growth mechanism of calcium carbonate (CaCO₃) is still unclear. Based on molecular dynamics simulation, the formation process and nucleation mechanism of CaCO₃ in confined C-S-H nanopores with different calcium-silicon ratios were studied. The results show that the clustering behavior of CaCO₃ in C-S-H nanopores filled with saturated CaCO₃ solution can be divided into three phases, rapid agglomeration stage, slow cluster stage, and stable cluster stage. The aggregation is mainly dependent on ionic bonding for …

Campus Master Plan Update - August 2023, Facilities Management, East Tennessee State University

Campus Facility Master Plans

No abstract provided.

In Pursuit Of Eye Tracking For Visual Landscape Assessments, David Evans, Brent Chamberlain

Landscape Architecture and Environmental Planning Faculty Publications

Visual quality and impact assessments have historically relied on experts to formally evaluate the visual properties of a landscape. In contrast, environmental psychologists have studied subjective landscape preferences using ratings and surveys. These two approaches represent, respectively, the “objectivist” and “subjectivist” paradigms within visual landscape research. A gap, however, exists between these approaches: actual observation behaviors. In this paper, we argue for the inclusion of eye-tracking research in visual landscape assessments as a critical bridge between objective landscape qualities and subjective visual experiences. We describe the basics of eye-tracking methods and data types to introduce the role of eye movements …

Reviving Historic Buildings - Adaptive Reuse Of The Jazzy Building, Mazze Stokes

Honors Theses

In the face of rapid urbanization and modernization, the significance of historic preservation and adaptive reuse has gained prominence as a sustainable approach to development. There is an intricate relationship between historic preservation and adaptive reuse, delving into the principles, challenges, and benefits inherent in this practice as they apply to the Jazzy Building on 619/621 Market Street in Downtown Chattanooga Tennessee. A mixed-use approach for the Jazzy Building is optimal, as it addresses the pressing need for expanded housing amidst Chattanooga's population growth, capitalizes on its potential as a tourist attraction, and aligns with the city's strong environmentalist ethos.

Trust: The Inertia Taxonomy Of Trust And Learning Outcomes Of Trust Building Exercises, Ann B. Lyons

All Theses

This study investigates United States construction professionals’ view of trust in the workplace. In particular the focus is on building trust through trust building exercises. In order to accomplish this, a literature review was conducted focusing on trust in the worldwide construction industry. This was followed by interviews with US construction professionals who focus on team building. These interviews informed a survey sent to a wide variety of US construction professionals. The survey had two sections of content questions, 1. view of trust indicators and 2. perception of trust building exercises. Finally, experts in the field of construction team building …

A Study Of The Impact And Mitigation Strategies For Community-Defined Historic Places At Immediate (Within Three Decades) Risk Of Sea Level Rise, Isaac Quaye

All Theses

The rising sea level casts formidable threats on community-based historic places within coastal communities. These community-defined historic places derive their meaning from local values and are more recognized within the local community. Unlike recognized iconic historic places, these resources are confronted with inadequate resources to address the impacts of punctuated climate events. This study investigates the imminent threats posed by sea level rise (SLR) to community-defined historic places within the next three decades (2025) and explores mitigation strategies proposed by stakeholders. The study used a GIS-based (enhanced bathtub model) to model the impact of coastal inundation on three historic places …

Investigation Of Faults In Air-Conditioning Systems In Commercial Buildings: Occurrence, Diagnostic Validation, And Energy Impacts, Yuxuan Chen

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

In commercial buildings, fault detection and diagnosis (FDD) tools have been developed for detecting and diagnosing faults in building systems, which can provide useful information regarding fault locations and potential causes of faults, so that building operators and facility staff can be notified in time and quickly respond as problems arise. Nowadays, there are many commercial FDD tools available in the market, and these tools have been widely adopted in large- and medium-scale commercial buildings in the United States. Several studies have demonstrated the energy saving potential with the use of FDD in commercial HVAC systems, and one critical aspect …

Environmental Barriers And Facilitators To Family-Centered Rounds In Pediatric Critical Care Settings, Swati Goel

All Dissertations

Rounding in healthcare settings involves the clinical team making routine trips to the patient room to evaluate the patient and devise a care plan (Lynch, 2015). In ICUs, multiple rounds occur throughout the day based on purpose, location, and timing (Mittal, 2014), including morning, surgical, and post-admission rounds (Gurses & Xiao, 2006). Due to the nature of patient illnesses in ICUs, multidisciplinary rounds are most effective in making patient care decisions (Gurses & Xiao, 2006; Lane et al., 2013).

This study discusses the morning rounds that an attending physician and their team lead to create a plan for the day …

The Jazzy Building: A Revitalization Plan, Christine Bebawy

Honors Theses

The Jazzy building is located at 619-621 Market Street in Chattanooga, TN in the City Center downtown area. Both the interior and exterior of the building show signs of being vacant for a long period. The Jazzy building has significant historical value, especially the east and west facades that feature various ornamentations and details that testify to its significance. Although the building's interior has been severely damaged, it is still possible to salvage and reuse some of the materials. To determine the appropriate use of the Jazzy building, a market analysis of downtown Chattanooga research was referenced, along with a …

Timber Buckling Restrained Brace, Finn K. Burke

Architectural Engineering

Buckling Restrained Brace Frames (BRBs) are a lateral force resisting system providing near equal compressive and tensile capacities through the mitigation of compression buckling. BRBs have traditionally existed in the steel building market, with limited use in wood construction. The proposal of a Timber Bucking Restrained Brace Frame (TBRB) presents a BRB option for the low-rise and mid-rise wood framed market, using readily available materials within the low/mid-rise construction cost bracket. Five previous TBRB iterations have been built and tested, with results showing promising results for further TBRB development and exploration. The sixth and current iteration of the TBRB builds …

Effortless Mindfulness Toolkit: Easy Meditation Scripts To Begin Each Class., Brett Whysel

Open Educational Resources

The Effortless Mindfulness in the Classroom Toolkit is an open educational resource designed to create happier classrooms, boost student engagement, and foster a sense of community through brief, effective mindfulness exercises. This comprehensive toolkit provides educators with everything they need to seamlessly integrate mindfulness practices into their teaching routines, regardless of prior experience. The toolkit includes introductory slides, 15 ready-to-use meditation scripts, and accompanying audio recordings, covering a variety of mindfulness techniques such as focused breathing, body scans, and loving-kindness meditations. Each meditation is paired with a reflective prompt to deepen student engagement and reinforce the benefits of mindfulness. Additionally, …

Understanding The Challenges To Robotic-Assisted Surgery Adoption From The Perspectives Of The Human-Robot Interaction, Built Environment, And Training, Patrick A. Fuller

All Theses

Introduction: Robotic-assisted surgery (RAS) is a form of minimally invasive surgery that is increasing in both its adoption and development due to many perceived advantages such as tremor reduction and motion scaling. However, RAS is still relatively new and there are a variety of novel barriers and challenges to the adoption of these platforms. Objectives: This study aims to understand how the integration of RAS platforms impacts the interactions and outcomes of interactions between surgical team members to explore the barriers from three aspects critical to facilitating Robotic-assisted-surgery (RAS) adoption: the human-robotic interaction, built environment, and RAS training. Future …

Assessing The Efficacy: Statistical Models Vs. Machine Learning (Ml) Approaches For Prediction Modeling In The Construction Industry, Stuti Garg

All Theses

The construction industry has witnessed a significant surge in the daily volume of objective data (i.e., precise data sources representing actual project progress) accumulated across a project's lifecycle. This abundance of data presents an opportunity to extract valuable organizational insights and potential remedies for project management issues. The construction technology landscape is gradually evolving towards integrated software platforms to meet customer needs more effectively. However, the construction sector lacks comprehensive predictive analytics solutions for projects or industry-wide applications - a significant portion of descriptive analytics tools rely on trade association surveys or dashboards constructed from collected company data, suffering from …

Evaluation And Improvement Of The Design 4 Every Drop Course, Kenzy Fogle

All Graduate Reports and Creative Projects, Fall 2023 to Present

Utah and the greater Intermountain West are experiencing a water crisis. Many factors are contributing to this situation, including an arid climate exacerbated by climate change, rapid population growth, and a high-water-demanding landscape typology. Landscapes currently consume an estimated 60-80% of Utah’s potable water, representing a significant opportunity for water savings. However, changing the traditional water-dependent landscape typology requires educating the public regarding water-wise landscape design processes, best practices, and implementation approaches. Utah State University is the land grant university for Utah and home to one of the oldest Landscape Architecture departments in the Intermountain West. Utah State University’s community …

The Sustainable Sites Initiative As It Applies To Existing Parks In Logan Utah, Randall Smith

All Graduate Reports and Creative Projects, Fall 2023 to Present

The Intermountain West of the United States consists of a variety of climates and landscapes. Despite their diversity, all of these regions face similar issues, such as water shortage, lack of biodiversity, invasion of non-native plant species, land development, and population growth. The pursuit of sustainability has become imperative in order to meet the needs of the present, while simultaneously safeguarding the ability of future generations to meet their own needs. Many influential landscape architects have advocated for sustainable design; namely, Frederick Law Olmsted, Ian McHarg, and Laurie Olin. However, sustainability is used too often as a generic buzzword, diminishing …

Introduction To Landscape Architecture State Standards And Curriculum For Utah High Schools, Joseph Pancoast

All Graduate Reports and Creative Projects, Fall 2023 to Present

Utah State University (USU) offers a successful Introduction to Landscape Architecture class for college students; this class increases awareness and understanding of landscape architecture as a profession. Though this is a wonderful resource offered at the college level, high school is a key time for career awareness. Unfortunately, there is a lack of student awareness surrounding the profession of landscape architecture. In Utah and the rest of the United States, there are currently no in-person Introduction to Landscape Architecture classes available in a high school setting to increase awareness and understanding for students in a high school setting. Providing a …

Presence Of Other People In Urban Parks: Exploring Psychological Effects Using Virtual Reality, Eye Tracking, And Qualitative Methods, Shuai Yuan

All Dissertations

Urban parks are essential public spaces that provide numerous benefits, but the presence of others can significantly influence these benefits. This dissertation explores the complex and context-dependent effects of the presence of other people on urban park experiences by drawing on diverse disciplinary perspectives and employing multiple methodological approaches, including theoretical synthesis, virtual reality, eye tracking, and qualitative methods.

Chapter 2 develops a comprehensive theoretical framework that bridges social psychology, environmental psychology, and practice-based fields. It categorizes the impacts of the presence of others on park users' experiences into perceptual, behavioral, cognitive-emotional, and symbolic domains. Chapter 3 utilizes virtual reality …

Integrating Artificial Intelligence And Augmented Reality For Enhanced Task Performance In The Construction Industry, Aasish Chandrika Bhanu

All Dissertations

The Architecture, Engineering, and Construction (AEC) sector, characterized by its complex tasks, often faces challenges in adopting cutting-edge technologies, a trend that can significantly hinder productivity improvements compared to other industries. This dissertation explores the emerging integration of Artificial Intelligence (AI) and Augmented Reality (AR) within the AEC domain, investigating how effectively this can be implemented to potentially revolutionize industry practices. AI could be used in the AEC domain for advanced analytical and decision-making processes, while AR could be used for training, visualization, and remote collaboration.

In scenarios where construction site workers require expert guidance, these technologies could be helpful. …

Extrudability Window And Offline Test Methods To Predict Buildability Of 3d Printing Concrete, Yu Cun Gu, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This Study Investigates the Effect of Thixotropy and Stiffness Evolution on the Extrudability and Buildability of 3D Printing Concrete. Different Types of Supplementary Cementitious Materials and Limestone Filler Were Used to Prepare Mortars with Varying Levels of Thixotropy and Early-Age Stiffness. Mixtures with Yield Stress and Flocculation (Τfloc) of 180–400 and 420–950 Pa, Respectively, Exhibited Adequate Extrudability Without Plastic Collapse. the Printing Was Completed 8–15 Min after Mixing at a Vertical Build-Up Rate of 138 Mm/min. Several Process Parameters, Including Rest Time to Secure a Penetration Resistance of 150 KPa (T150) and Penetration Resistance at Various Rest Times Were Developed …

Rheology Modification Of Flowable Mortar With Co2, Sean Monkman, Soo Duck Hwang, Kamal Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The Rheological Properties of Mortar Samples with Different Additions of CO₂ during Mixing Were Determined. Flowable Cement-Based Mortars at Three Different W/c (0.55, 0.45 and 0.35) Were Produced and the Effects of CO₂ Gas Were Examined on the Fresh Properties of Slump Flow, Yield Stress and Plastic Viscosity. According to the Experimental Results, the Mortar Yield Stress and Plastic Viscosity Increased Faster over Time Than in a Reference System with the Increasing Addition of CO₂ and Greater Effects Were Seen at the Lowest W/c of 0.35 Than at the Others. the Impact of the CO₂ on …

Effect Of Absorption Kinetics Of Superabsorbent Polymers On Printability And Interlayer Bond Of 3d Printing Concrete, Yu Cun Gu, Shuyi Zheng, Hongyan Ma, Wu Jian Long, Kamal H. Khayat

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study examines the effect of the material characteristics of superabsorbent polymers (SAPs) on the printability and interlayer bond strength of 3D printing concrete. Three types of SAP, including two acrylamide-co-acrylic polymers with coarse and fine particle sizes (S1 and S2) and an acrylic copolymer (S3), were employed. The investigated mortar mixtures had a fixed initial mini-slump flow of 195 ± 10 mm and yield stress of 290 ± 25 Pa. The fluidity of SAP-incorporated mortars was maintained by either adjusting the superplasticizer dosage or increasing the water content. Test results indicate that particle flocculation is dependent on SAP absorption …

Carbon Capture And Renewable Energy Policies: Could Policy Harmonization Be A Puzzle Piece To Solve The Electricity Crisis?, Mahelet G. Fikru, Fateh Belaïd, Hongyan Ma

Economics Faculty Research & Creative Works

The electricity market crisis, driven by factors such as increased energy demand, rising fuel prices, aging infrastructure, and greenhouse gas emissions, requires a multifaceted approach including the strategic implementation of Carbon Capture and Storage (CCS) technologies, which despite high costs and potential adverse impact on renewable investments, can allow the use of fossil fuels to maintain grid stability, and simultaneously lower carbon footprint. Across the world, several nations are designing financial incentives and improving regulatory frameworks to reduce barriers to the deployment of CCS. However, it is not clearly understood whether and to what extent such policy support would affect …

Indefinability Of Effective Stress For Unsaturated Soils, Xiong Zhang, Sandra Houston

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

For decades, researchers have searched for an unsaturated soil effective stress that performs analogously to effective stress for saturated soils and provides some simplifications over net stress and suction approaches. A recent debate is whether problems identified with unsaturated soil effective stress can be resolved via elastoplastic analyses. Effective stress equations are reviewed and categorized as being based on volume change, shear strength, yield, or degree of saturation. These equations are evaluated for consistency with saturated soil effective stress expectations using the Barcelona basic model (BBM), simplified into an integrated elastoplastic framework using the modified state surface approach (MSSA). Under …

Threat And Hazard Identification And Risk Assessment (Thira) Guidance For Railroads, Frances L. Edwards, Daniel C. Goodrich

Mineta Transportation Institute

Climate change creates new challenges for all critical transportation infrastructure, especially for railroads with an open system that is continuously exposed to the elements. A Threat and Hazard Identification and Risk Assessment (THIRA) is a necessary first step for an organization to understand the challenges and develop strategies for adaptation to them. In many cases, the railroad sector is uniquely positioned to mitigate greenhouse gas emissions through mitigation steps. This guide will assist railroad risk managers and emergency managers to evaluate the risks and determine how best to respond to them through preparation, mitigation, or adaptation. The THIRA is the …

The Influence Of Business Development Areas On Leadership Positions Within Landscape Architecture Professional Practice, Catherine E. Frost

All Graduate Theses and Dissertations, Fall 2023 to Present

Landscape architecture is a discipline that connects natural, physical, and human sciences, and which operates as a professional design practice. While technical skills and design proficiency have historically been the focus of landscape architecture programs, the literature indicates a recognition of the indispensable role of entrepreneurial skills alongside design expertise (Marsh, 1928; Pray, 1911; Rice, 2017; Shepphard et al., 2018). However, there remains a scarcity of research specifically investigating business development skills within landscape architecture practice (Evans & Leccese, 1991; Gobster et al., 2010; Granet, 2021; Littlefield, 2015; Powers & Walker, 2009).

To bridge this gap, this study engaged in …

A Framework To Unveil Design Decisions In Ecological Urbanism, Addison C. Martin

All Graduate Theses and Dissertations, Fall 2023 to Present

Ecological urbanism offers a framework for landscape architecture to address the challenges posed by dynamic infrastructure projects in the face of changing climates and human impacts. As Nature-based Solutions (NbS) become more prevalent, the role of aesthetics in these solutions becomes increasingly important. However, there has been a lack of systematic approaches to assess the design aesthetics of landscape architecture in practice. This study aims to fill this gap by providing a rapid assessment framework tailored for landscape architecture practitioners. Drawing from the concepts of regenerative design and ecological urbanism, the framework comprises three sections: Ecological Function (EFx), Anthropocentric Function …

Revisiting Bodies In Interior Design Practice, Paramita Atmodiwirjo, Yandi Andri Yatmo

Interiority

Addressing human bodies is inevitable in interior inquiries and practices. Integrating knowledge about human bodies into design practice can extend beyond the idea of bodies as merely static entities with fixed dimensions. The idea of bodies as the basis for spatial design practice views the human body as a living entity that dwells, occupies, moves, and engages in space. Knowledge about bodies as the basis of practice also needs to view bodies' presence as sociocultural entities. The emergence of the virtual environment provides another context with a shifting materiality of bodies and interior spaces. This issue of Interiority acknowledges the …

Assessing Relations Among Visual Variables In Hotel Lobbies Using Deep Learning, Taraneh Saniei, Mansoureh Kianersi, Shervan Fekri-Ershad

Interiority

To understand the relationships between cognitive variables like visual complexity, coherence, and colour contrast in interior spaces, direct numerical analysis is crucial. Conventional approaches are limited due to the brain's struggle to process visual information without cognitive manipulation. However, advancements in artificial intelligence enable direct examinations. This study used a convolutional neural network to assess the intensity of colour contrasts in images of 5-star hotel lobby interiors with high levels of coherence and complexity. The results indicated that visually complex lobby interiors have less warm-cool and dark-light contrast but more pronounced complementary contrast than coherent lobby interiors. Additionally, a negative …