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Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta 2019 Portland State University

Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta

Dissertations and Theses

A large magnitude, long duration subduction earthquake is impending in the Pacific Northwest, which lies near the Cascadia Subduction Zone (CSZ). Great subduction zone earthquakes are the largest earthquakes in the world and are the sole source zones that can produce earthquakes greater than M8.5. Additionally, the increased duration of a CSZ earthquake may result in more structural damage than expected. Given such seismic hazard, the assessment of reinforced concrete substructures has become crucial in order to prioritize the bridges that may need to be retrofitted and to maintain the highway network operable after a major seismic event. Recent ...


A Decision-Making Tool For Incorporating Cradle-To-Gate Sustainability Into Pavement Design, Sujata Subedi 2019 Louisiana State University and Agricultural and Mechanical College

A Decision-Making Tool For Incorporating Cradle-To-Gate Sustainability Into Pavement Design, Sujata Subedi

LSU Master's Theses

The need to continually maintain an aged and crumbling national roadway network, together with a growing demand for upgrading has resulted in major environmental and economic impacts around the nation. This has led to an interest in developing a structured framework to quantify the sustainability performance of pavements by balancing economic and environmental performance against engineering criteria. This study developed an Environment Product Declaration (EPD) based, decision-making framework to quantify the sustainability of pavement design alternatives. In this study, the sustainability of pavement is described in tandem with Environmental and Economic performance criteria. First, the Environmental analysis was inclusive of ...


Development Of An Rfid Tracking System For Coarse Sediment Transport In A Flume Setting, Peter Mahoney Jr. 2019 Dartmouth

Development Of An Rfid Tracking System For Coarse Sediment Transport In A Flume Setting, Peter Mahoney Jr.

ENGS 88 Honors Thesis (AB Students)

Development of an RFID Tracking System for Coarse Sediment Transport in a Flume Setting

Peter E. Mahoney

Professor Carl Renshaw

Understanding how sediment moves through a fluvial system has important implications for the study of river systems, sediment flux, and flood events. Over the past decade, RFID (radio frequency identification) technology has emerged as a useful method for tracking the movement and transport of coarse sediment clasts. This approach has been used to measure the transport of large clasts in mid-sized streams, ephemeral channels, and laboratory flume settings. However, this research utilized finite transport of sediment and focused on accurately ...


Environmental And Occupational Impacts From U.S. Beef Slaughtering Are Of Same Magnitude Of Beef Foodborne Illnesses On Human Health, Shaobin Li, Jeyamkondan Subbiah, Bruce Dvorak 2019 University of Nebraska-Lincoln

Environmental And Occupational Impacts From U.S. Beef Slaughtering Are Of Same Magnitude Of Beef Foodborne Illnesses On Human Health, Shaobin Li, Jeyamkondan Subbiah, Bruce Dvorak

Biological Systems Engineering: Papers and Publications

Foodborne pathogens and occupational hazards are two primary safety concerns for U.S. beef slaughterhouses. The anthropogenic environmental impacts due to intensive resource use and pollution also exert threats to human health. Quantifying human health impacts from various sources remain a grand sustainability challenge for U.S. beef industry. We develop a framework to systematically estimate and compare human health impacts associated with U.S. beef foodborne illnesses from major pathogens and environmental impacts and occupational hazards from U.S. beef slaughtering on a common metric, disability-adjusted life year (DALY). Foodborne illnesses and occupational hazards are estimated by synthesizing published ...


Investigation Of Tactile Sensory System Configuration For Construction Hazard Perception, Sayan Sakhakarmi, Jeewoong Park 2019 University of Nevada, Las Vegas

Investigation Of Tactile Sensory System Configuration For Construction Hazard Perception, Sayan Sakhakarmi, Jeewoong Park

Civil & Environmental Engineering and Construction Faculty Publications

The application of tactile-based wearable devices to assist in navigation for people with low sight/low memory has demonstrated the feasibility of using such devices as a means of communication. Accordingly, a previous study in construction research investigated various parameters of tactile signals to develop a communicable system for potential application in construction hazard communication. However, the nature of construction limits the application of such devices to the body of construction workers, and it is important to understand sensor design parameters for improved communication, which has not been given significant attention yet. Therefore, this study aims to determine key design ...


Western Kentucky University Stormwater Utility Survey 2019, C. Warren Campbell 2019 Western Kentucky University

Western Kentucky University Stormwater Utility Survey 2019, C. Warren Campbell

SEAS Faculty Publications

No abstract provided.


Investigation Of Grout - A Comparison Of Standard Grout Mix To Self-Consolidating Grout Mix, Rachel Garcia Chandler 2019 California Polytechnic State University, San Luis Obispo

Investigation Of Grout - A Comparison Of Standard Grout Mix To Self-Consolidating Grout Mix, Rachel Garcia Chandler

Architectural Engineering

Masonry is a major structural material for low rise buildings, however the design of masonry buildings is rarely taught as a formal course at most universities. As part of the educational experience and to become familiar with the specifications and testing procedures for grouted masonry, a student run experiment on varying the water to cement ratio of masonry grout was conducted. The purpose is to report on the effects of changing the water-to-cement (W/C) ratios in a standard grout mix. The typical W/C ratio is approximately 0.80:1.00. In order to show the effects of increasing ...


Analysis Of Disengagements In Semi-Autonomous Vehicles: Drivers’ Takeover Performance And Operational Implications, Francesca M. Favaro, Sky Eurich, Syeda Rizvi, Shivangi Agarwal, Sumaid Mahmood, Nazanin Nader 2019 San Jose State University

Analysis Of Disengagements In Semi-Autonomous Vehicles: Drivers’ Takeover Performance And Operational Implications, Francesca M. Favaro, Sky Eurich, Syeda Rizvi, Shivangi Agarwal, Sumaid Mahmood, Nazanin Nader

Mineta Transportation Institute Publications

This report analyzes the reactions of human drivers placed in simulated Autonomous Technology disengagement scenarios. The study was executed in a human-in-the-loop setting, within a high-fidelity integrated car simulator capable of handling both manual and autonomous driving. A population of 40 individuals was tested, with metrics for control takeover quantification given by: i) response times (considering inputs of steering, throttle, and braking); ii) vehicle drift from the lane centerline after takeover as well as overall (integral) drift over an S-turn curve compared to a baseline obtained in manual driving; and iii) accuracy metrics to quantify human factors associated with the ...


Nonlinear Mechanical Properties Of Road Pavements: Geometric Symmetries Explain The Empirical Difference Between Roads Built On Clay Vs. Granular Soils, Afshin Gholamy, Vladik Kreinovich 2019 University of Texas at El Paso

Nonlinear Mechanical Properties Of Road Pavements: Geometric Symmetries Explain The Empirical Difference Between Roads Built On Clay Vs. Granular Soils, Afshin Gholamy, Vladik Kreinovich

Departmental Technical Reports (CS)

It is empirically known that roads built on clay soils have different nonlinear mechanical properties than roads built on granular soils (such as gravel or sand). In this paper, we show that this difficult-to-explain empirical fact can be naturally explained if we analyze the corresponding geometric symmetries.


Quantifying Bonding Characteristics Between Uhpc And Normal-Strength Concrete For Bridge Deck Application, Sriram Aaleti, Sri Sritharan 2019 University of Alabama - Tuscaloosa

Quantifying Bonding Characteristics Between Uhpc And Normal-Strength Concrete For Bridge Deck Application, Sriram Aaleti, Sri Sritharan

Civil, Construction and Environmental Engineering Publications

Ultrahigh performance concrete (UHPC) is an advanced cementitious material which has excellent mechanical and durability properties, making it appropriate for the rehabilitation of concrete structures. This paper investigates the usage of a thin layer of UHPC overlaying a normal strength concrete (NC) deck. The behavior of the interface connection will have a significant impact on the overall structural and durability performance of the UHPC-NC composite deck system. An integrated experimental and analytical study was conducted to understand the influence of several variables, such as normal concrete strength, interface roughness, and curing condition on the shear transfer behavior across the interface ...


Exposed! The Impact Of Structural Materiality On The Design Of Architecture, Terri Boake 2019 University of Waterloo

Exposed! The Impact Of Structural Materiality On The Design Of Architecture, Terri Boake

Building Technology Educator's Society

There is a formative connection between structural choice and architectural design. Where the term “low hanging fruit” has often been used with reference to critical first choices towards climate responsive sustainable design, a similar approach can be applied to design-thinking when it comes to structural choices. The consideration of the material nature of the primary structure at the conceptual stage of design can allow for improved focus during the design process. This is particularly critical when working with exposed structural systems as the materiality also directly impacts the aesthetics. Exposing a structure requires that the architect be significantly more technically ...


The Corner: Tectonic Intersections Of The Architectural Environment, Chad Schwartz, Jaasiel Duarte-Terrazas,, Nataani Garnenez 2019 Kansas State University

The Corner: Tectonic Intersections Of The Architectural Environment, Chad Schwartz, Jaasiel Duarte-Terrazas,, Nataani Garnenez

Building Technology Educator's Society

Architectural corners serve as nodes of constructional shifting, of structural logistics, of environmental control emphasis, of spatial experience, and of aesthetic considerations and it is in these particular building intersections that our greatest architects have exceled. Despite the importance of the corner, most architectural software introduces generalizations into design work that all but assures improper understanding of a building’s corners, especially for students and those novice to the profession. The transformations undertaken in the computer rarely reflect the strategies used to create physical, occupiable space. For instance, when working in building information modeling software, walls intersect via “butt” or ...


Intuition Before Integers: Integrating Building Technology Into The Design Studio, James Leach, Kristin Nelson 2019 University of Detroit Mercy

Intuition Before Integers: Integrating Building Technology Into The Design Studio, James Leach, Kristin Nelson

Building Technology Educator's Society

The studio methodology, used almost universally to teach architectural design in the US, embraces speculative investigation and hands-on learning, offering unparalleled opportunities for integrated thinking and open-ended inquiry. Building technology courses, in contrast, tend to be taught in more constrained, and more passive modes - lecture classes, sometimes accompanied by a laboratory or including a project or two. As instructors of both design studios and building technology courses, we have found it difficult to generate the level of engagement and enthusiasm, or achieve the depth of inquiry, in the technology classroom that is common in the design studio. Moreover, we find ...


Design-Build For Discovery: Applied Research On The Construction Site, Mary Hardin 2019 University of Arizona

Design-Build For Discovery: Applied Research On The Construction Site, Mary Hardin

Building Technology Educator's Society

The University of Arizona’s architectural education program utilizes the dual learning vehicles of design-build pedagogy and affordable housing projects to investigate the cost effectiveness of regional vernacular construction methods paired with contemporary energy and water conservation strategies to control initial construction costs and long-term operational costs of single-family dwellings.

Earth, clay and stone, indigenous building materials with long histories in the arid deserts of the southwestern U.S., have diminished in use as labor prices have risen in the construction industry. Over the course of six design-build projects, Building Technology faculty and students experimented with and improved wall forming ...


Big Glue! Testing The Scalability Of Adhesives In Architecture And Design, Emily White, Erik Sapper 2019 California Polytechnic State University, San Luis Obispo

Big Glue! Testing The Scalability Of Adhesives In Architecture And Design, Emily White, Erik Sapper

Building Technology Educator's Society

This paper documents the questions, methods and outcomes of “Big Glue,” a research collaboration among students and faculty from Cal Poly, San Luis Obispo’s chemistry and architecture departments that explores the potentials of structural adhesives in architecture and design. The project asks how adhesives can be more broadly used as work increases in size from the scale of models to full-scale construction.

Our focus is on aluminum structures. We looked at existing adhesive use in construction and in the automotive industry, where adhesives are increasingly used on aluminum and aluminum composites to reduce weight and consequently increase fuel efficiencies ...


Design/Lift: An Extra Concrete Beam In A Park, Federico Garcia Lammers 2019 South Dakota State University

Design/Lift: An Extra Concrete Beam In A Park, Federico Garcia Lammers

Building Technology Educator's Society

According to the Department of Transportation, a commercial truck can drive at a maximum speed of sixty miles per-hour while carrying a sixty-foot-long precast concrete beam on a state highway. The beam in question is headed to a town of 1,800 people to be installed as part of a student-driven, faculty led Public Works project in Webster, South Dakota. Design/Lift focuses on the choreography of lifting and positioning a large piece of concrete on a public site. The beam sits in a yard, unapproved to span highway bridges, but potentially ready to engage the public in unexpected ways ...


Structures For Relief & Resiliency: Enhancing Creative Applications Of Technical Acumen Through Constrained Conditions, Rob Whitehead 2019 Iowa State University

Structures For Relief & Resiliency: Enhancing Creative Applications Of Technical Acumen Through Constrained Conditions, Rob Whitehead

Building Technology Educator's Society

The design of places, objects, and experiential operations are of great importance to the relief, recovery and rebuilding efforts that affect millions of people each year. Proactively designing for these scenarios requires a more than just sensitivity to the vexing nature of the people and their problems. The inter-disciplinary teams that assist in these efforts must be able to translate these activities into solutions that have insights into the structural, material, and construction considerations. Without these qualities, the tangible, useful, and deployable solutions could be marginalized until they become the lowest common denominator of design solutions.

The value of design ...


Truss-Ting History, Chad Dennis, Joshua Friedman 2019 Northeastern University

Truss-Ting History, Chad Dennis, Joshua Friedman

Building Technology Educator's Society

Building performance in this case being evaluated by traditional means, such as energy use over time, in addition to qualitative questions of space, history, pedagogy etc. Another term explicit in this project is that of “future use” by which we build on typical modes of site analysis in addition to the growing body of research developed through building scientists, we ask how building systems can be used to accommodate a variety of program while simultaneously maintaining a strong connection to place. Through the use of a hybrid system of glulam trusses and CLT panels to repurpose an existing historic pumphouse ...


Technical Provocations: Material Inventions, Structural Assemblies, And Environmental Responses As Precursors And Design Prompts, Lisa Huang, Bradley Walters 2019 University of Florida

Technical Provocations: Material Inventions, Structural Assemblies, And Environmental Responses As Precursors And Design Prompts, Lisa Huang, Bradley Walters

Building Technology Educator's Society

The purpose of the study is to develop a studio course that is a precursor to the integrative studio in the University of Florida Master of Architecture curriculum. The studio course introduces each building technology discipline as design concept generators and the course intends to prepare students not to think of building technologies in only practical terms but to integrate a conceptual thinking regarding building technologies in their design work. Our primary goal is for the students to discover poetic approaches for working with building technologies before they need to integrate all disciplines simultaneously in their design work. The studio ...


Steel Structures That Breathe: Two Extensively Glazed Buildings That Integrate Natural Ventilation Within Structural Members, Patrick Charles 2019 Roger Williams University

Steel Structures That Breathe: Two Extensively Glazed Buildings That Integrate Natural Ventilation Within Structural Members, Patrick Charles

Building Technology Educator's Society

The paper is a case study of two extensively-glazed steel- framed buildings, Jean Prouvé’s 1957 temporary school in Villejuif, France, and, Müller Verdan Architekten’s 2006 Sporthalle “Gotthelf” in Thun, Switzerland, that integrate natural ventilation within the building structure itself.

Practically, this unique approach enables the designers to provide usually mutually exclusive features, large glass formats and natural ventilation, without incurring the various penalties associated with operating such very heavy elements.

Conceptually, the idea of integrating the ventilation function within structural members goes against the standard orthodoxy consisting of the separation of enclosure systems from skeletal structural systems. This ...


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