Development Of A New Seismic Metamaterial For Passive Vibration Control Of Civil Structures,
2025
The University of Texas Rio Grande Valley
Development Of A New Seismic Metamaterial For Passive Vibration Control Of Civil Structures, Shayan Khosravi
Theses and Dissertations
Seismic metamaterials are engineered structures that control mechanical wave propagation through frequency bandgaps, making them useful for structural control and seismic hazard mitigation. This study introduces the Passive Friction Seismic Metamaterial Base Isolation (PFSMBI) system, which combines frequency bandgaps and solid friction energy dissipation to improve the seismic performance of civil structures. The PFSMBI consists of a lattice structure with identical cells connected by springs and dampers, shifting a building’s natural frequency away from earthquake excitations. A dynamic model analyzes the system’s absolute acceleration, drift responses, and base shear force, optimizing parameters such as frequency ratios, mass ratios, and the …
Influence Of Terrain Model Resolution On Rockfall Dispersion And Tortuosity Of Rockfall Paths,
2025
Boise State University
Influence Of Terrain Model Resolution On Rockfall Dispersion And Tortuosity Of Rockfall Paths, Lucas Jason Arsenith
Boise State University Theses and Dissertations
The geology of the Snake River Plain region of southwestern Idaho contains terraces formed from downcutting of the Boise River and columnar jointed basalt cliffs from lava flows. Within the city limits of Boise, Idaho, rockfall events originate from these columnar jointed basalt cliffs. Whitney Terrace, a rockfall-prone location in southwestern Boise, was chosen as the study site. Site-specific LiDAR data was used to create a bare earth terrain model, and rockfall boulders were geolocated and measured to be used as inputs into rockfall models. The slope below the cliff face was divided into four distinct slope zones, each with …
Development Of A Probabilistic Interaction Rule And Failure Pressure Model For Pipelines With A Colony Of Corrosion Defects,
2025
Marquette University
Development Of A Probabilistic Interaction Rule And Failure Pressure Model For Pipelines With A Colony Of Corrosion Defects, Kiswendsida J. Kere
Civil and Environmental Engineering Faculty Research and Publications
The interaction effect originating from a defect colony can pose a higher pipeline failure risk than the case when such possible interaction is not considered. Recognizing the limitations in existing models that can lead to inaccurate pipeline integrity assessment, the goal of this study is to develop a probabilistic interaction rule and predictive burst failure pressure model for pipelines with a colony of corrosion defects. First, a comprehensive database of burst failure pressure for pipes with a colony of corrosion is established that encompasses a wide range of influencing factors (e.g., spacing, defect sizes, and material properties) on the defect …
Comparison And Evaluation Of Overlay And Leveling Binder In Traffic Circle Construction,
2025
University of South Alabama
Comparison And Evaluation Of Overlay And Leveling Binder In Traffic Circle Construction, Pratik Neupane
Graduate Theses and Dissertations (2019 - present)
Traffic circles play a vital role in managing traffic flow and ensuring safety, yet their unique traffic conditions make them prone to early cracking and deformation. This study evaluated the performance of overlay and leveling binder asphalt mixtures for a reconstructed traffic circle at the University of South Alabama, using plant-mixed laboratory-compacted (PMLC) specimens. Volumetric analyses were performed to determine maximum specific gravity (Gmm), bulk specific gravity (Gmb), and air voids content. Laboratory tests were conducted on both the overlay and leveling binder layers using indirect tensile cracking test (IDEAL-CT) and indirect tensile rutting test (IDEAL-RT) to assess cracking tolerance …
Incorporating Recycled And Repurposed Plastic Into 100% Reclaimed Asphalt Pavement,
2025
University of South Alabama
Incorporating Recycled And Repurposed Plastic Into 100% Reclaimed Asphalt Pavement, Basant Bhatt
Graduate Theses and Dissertations (2019 - present)
The increasing awareness of sustainability in the asphalt industry has driven the use of recycled materials like reclaimed asphalt pavement (RAP) and waste plastic. This study examines the incorporation of recycled polypropylene (rPP), recycled high-density polyethylene (rHDPE), and recycled low-density polyethylene (rLDPE) at 0.3%, 0.6%, and 0.8% dosages into 100% RAP, along with the warm mix asphalt additive Evotherm® P25. Laboratory tests were conducted to evaluate the mechanical and durability performance of the modified asphalt mixtures while rutting and fatigue life were evaluated using mechanistic-empirical (ME) analysis in PerRoad software. Both plastic type and dosage had a statistically significant impact …
Towards Advancing Streamflow And Peak Flow Prediction With Machine Learning: Identifying Infrastructure At Risk,
2025
University of Nebraska-Lincoln
Towards Advancing Streamflow And Peak Flow Prediction With Machine Learning: Identifying Infrastructure At Risk, Sudan Pokharel
Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–
Due to climate change and its impact, the need for adaptive strategies for natural disaster mitigation and resource management has never been more urgent. Central to this is water resource management, which is essential for sustainable human activities, ecological balance, and the mitigation of natural hazards like floods. Streamflow is a crucial element of water resource management and plays a vital role in planning and building water infrastructure, implementing emergency response plans, supporting flood mitigation initiatives, and regulating agricultural and industrial use. However, accurate prediction of streamflow still remains a challenge due to the complex non-linear and non-stationary interaction between …
Building Resilience: Strategies For Sustainable Wildfire Management In California,
2025
Kennesaw State University
Building Resilience: Strategies For Sustainable Wildfire Management In California, Jaiden Rennie, Pegah Zamani
Symposium of Student Scholars
Wildfires in California are becoming more intense and destructive, threatening communities, ecosystems, and livelihoods. This project explores how resilience and sustainability can work together to reduce wildfire risks and long-term damage. By reviewing research, case studies, and expert insights, it examines what’s driving these fires, climate change, poor land management, and human activity, and looks at solutions that can make a real difference. From community education programs to AI-driven fire detection and smarter policies, the findings highlight practical ways to better prepare for and manage wildfires. The goal is to contribute to a future where communities and the environment are …
Comparative Analysis On Design Error Risks In Design-Bid-Build And Design-Build Construction Approaches,
2025
University of Dar es salaam
Comparative Analysis On Design Error Risks In Design-Bid-Build And Design-Build Construction Approaches, Eradius Edward Rwakarehe
Tanzania Journal of Engineering and Technology (TJET)
This study was conducted to compare design errors risk in Design-Bid-Build (DBB) (traditional) and Design-Build (DB) methods in building projects. Several construction projects under both DB and DBB method were reviewed. On most of construction projects under DB method, it was found that there were over supply of floor area due to different reasons. Also, it was found that, clients’ requirements were changed during project execution, which resulted into change on schedule, contract value and project quality. It was also revealed that in most cases, designs were in accordance with the clients’ requirements as submitted earlier but during construction clients …
Flood Inundation Mapping For The Tana River Delta In Kenya,
2025
Department of Water Resources Engineering, University of Dar es Salaam
Flood Inundation Mapping For The Tana River Delta In Kenya, Anne N. Mugatha
Tanzania Journal of Engineering and Technology (TJET)
This study aimed at mapping flood inundation areas in the Tana River Delta. The 30 m DEM and digitized streams and road networks data were collected through remote sensing techniques followed by ground truthing. The data used also included Tana River discharge data at Garsen gauging station. Probability distributions were fitted on the annual maximum discharges. The 4 parameter generalized Gamma probability distribution was the best-fitting distribution according to goodness-of-fit criteria and the Q-Q plots and was used to generate the flood quantiles for different return periods. The generated flood quantiles were; 286 m3/s, 369 m3/s, 400 m3/s, 405 m3/s, …
Pros And Cons Of Preservation Treatments,
2025
Purdue University
Pros And Cons Of Preservation Treatments, Buzz Powell
Local Transportation Asset Management Conference
No abstract provided.
Travel Behavior Study On Shared Micromobility Service,
2025
Purdue University
Travel Behavior Study On Shared Micromobility Service, Yixiang Teng
Lyles School of Civil Engineering Graduate Student Reports
This study investigates the travel behavior on the shared micromobility service around Purdue University West Lafayette campus area. It aims to understand the shared micromobility user patterns and identify the barriers of adoption. The study was enlightened by the influence of pandemic on transportation choices and the shift on transportation habits, and the gap identified was the understanding of the college related population. The research method was a constructed survey distributed among Purdue University’s students, faculties and staffs. A total of 143 valid responses were collected, comprising 73 current users and 70 non-users. Results indicate that shared micromobility is primarily …
Examination Of A Bench-Scale Model For Post-Wildfire Flood And Water Quality Mitigation Solutions,
2025
University of Mississippi
Examination Of A Bench-Scale Model For Post-Wildfire Flood And Water Quality Mitigation Solutions, Cheyenne Ethridge
Honors Theses
The objective of this study is to determine a potential low-cost, sustainable, and rapidly deployable solution for post-wildfire flood and water quality mitigation in communities reliant on surface water for drinking water. Coalinga, Fresno County, California was selected as a study area for a full-scale solution due to its high risk of wildfires, high social vulnerability, and relatively low community resilience. A bench-scale demonstration of the system directs water into a gravel infiltration zone surrounded by a weir perimeter and followed by a clarifier. Because of their abundance in the area, almond shells were explored as a coagulant additive to …
Evaluation Of Chloride Diffusion In Concrete Using Bulk Diffusion Test And Scanning Electron Microscopy,
2025
Embry-Riddle Aeronautical University
Evaluation Of Chloride Diffusion In Concrete Using Bulk Diffusion Test And Scanning Electron Microscopy, Payton Davis
Doctoral Dissertations and Master's Theses
Reinforced concrete is one of the most widely used construction materials in the world with many bridges and other major infrastructure consisting of such structural elements. A primary concern impacting the durability of concrete is chloride penetration in aggressive environments such as marine or coastal areas. In such environments, chloride ions can penetrate into the pores of concrete leading to the corrosion of embedded steel reinforcement which compromises the structural integrity of concrete. To investigate the issue, a comprehensive experimental program was designed and implemented which involved the preparation and testing of 31 different concrete mixes, each incorporating varying proportions …
Selective Lithium Extraction Using Ion-Sieves From Geothermal Brine,
2025
Old Dominion University, Norfolk
Selective Lithium Extraction Using Ion-Sieves From Geothermal Brine, Agyare Asante, Abigail Berardi, Jayla Standin, Elliott Walker, Ujjwal Pokharel, Sandeep Kumar
Graduate Student Government Association Research Conference
Lithium (Li) is a critical component in modern green energy technologies, serving as the cornerstone for advanced batteries used in electric vehicles, renewable energy storage, and portable electronics. To address the increasing global demand for lithium, this study explores the synthesis and performance of ion-sieve novel adsorbents derived from the spinel-type precursor Li4Mn4.5Zr0.5O12 (LMZO). The precursor was produced using an economical solid-phase reaction that involved lithium, manganese, magnesium, and zirconium salts. This was followed by a two-stage calcination process involving 200 K for 2 hours and 450 K for 24 hours. Acid activation …
Establishing Particle Size Recommendations For Cationic Asphalt Emulsions,
2025
University of Arkansas, Fayetteville
Establishing Particle Size Recommendations For Cationic Asphalt Emulsions, Tanner Turben, Pedro Diaz-Romero, Andrew Braham
Civil Engineering Faculty Publications and Presentations
Asphalt emulsions are used in flexible pavement maintenance and rehabilitation treatments. Emulsion specifications for material characterization are based on testing methodology dating to the 1930s. Newer test methods, including particle size analysis (PSA) of binder droplets in emulsion, have been explored but not implemented into specifications. The objective of this study is to observe the particle size and performance of cationic slow-setting (CSS) emulsions and establish baseline particle size recommendations for cationic emulsions. Four physical property tests (residue, oversize particles, viscosity, and particle size) and two cold mix asphalt performance tests (indirect tensile strength (IDT) and direct shear test (DST)) …
Bayesian Belief Networks Approach To Prioritize Road Safety Mitigation Measures For Eco-Mobility Modes,
2025
United Arab Emirates University
Bayesian Belief Networks Approach To Prioritize Road Safety Mitigation Measures For Eco-Mobility Modes, Fatmah Mohamed Alyammahi
Thesis/ Dissertation Defenses
This study presents a novel approach to prioritizing road safety mitigation measures for eco-mobility modes in Abu Dhabi, employing a sophisticated Bayesian methodology integrated with cost-benefit analysis. The research addresses the pressing need for enhanced safety in sustainable urban transportation, focusing on pedestrians, cyclists, and users of micro-mobility devices. A comprehensive Bayesian Belief Network (BBN) model was developed, incorporating key variables influencing eco-mobility safety, including visibility, predictability, road curvature, obstructions, and lighting conditions. The model was constructed using a combination of historical accident data and Probabilistic reasoning. This approach allowed for the quantification of complex relationships between various risk factors …
Polymetal Phosphate Cement From Tin Fuming Furnace Slag: Hydration Mechanism, Mechanical Performance, And Environmental Safety,
2025
Missouri University of Science and Technology
Polymetal Phosphate Cement From Tin Fuming Furnace Slag: Hydration Mechanism, Mechanical Performance, And Environmental Safety, Peiwen Lv, Xintao Zhou, Zhongqiu Luo, Cuirong Yan, Xiunan Cai, Ting Huang, Pingyan Wang, Hongyan Ma
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Phosphate cement materials are ideal binders for the rapid repairment of civil engineering and solidification/stabilization of hazardous solid wastes due to their fast setting, high early strength and strong adhesion. However, the use of pure metal oxides as the raw base materials and their deactive pretreatment result in the high cost and energy consumption, limiting its broad applications. In this study, an eco-friendly polymetal phosphate cement (PMPC) was developed using tin fuming furnace slag (TFFS) as the primary base material. The hydration behavior, microstructure, mechanical properties, and environmental safety of PMPC were comprehensively evaluated. The results showed that the hydration …
Design Of A Retaining Wall For M-10 Freeway,
2025
Western Michigan University
Design Of A Retaining Wall For M-10 Freeway, Anthony Paul
Honors Theses
The M-10 Freeway, also known as the John C. Lodge Freeway, is bordered by retaining walls at the project location, one section of which required replacement to meet safety and serviceability standards. Located in Detroit, Michigan, this project focused on the redesign and replacement of a 300-foot section of retaining wall along the southeast-bound lanes of M-10, between Curtis Street and Outer Drive. The 20-foot-tall retaining wall also supports traffic loads from the overhead James Couzens Freeway. Through geotechnical and structural design, several alternatives were developed and evaluated. A CIP concrete cantilever wall was selected with a height of 21 …
Evaluating Embodied Carbon Emissions Of Post-Seismic Steel Framed Buildings,
2025
Utah State University
Evaluating Embodied Carbon Emissions Of Post-Seismic Steel Framed Buildings, Nicholas Leavitt
Student Research Symposium
The carbon emissions of earthquake damage repairs is on average 40% of a building's total carbon emissions in 50 years.
Wind-Resilient Solar: Harnessing Cfd For Enhanced Load Estimation,
2025
Louisiana State University
Wind-Resilient Solar: Harnessing Cfd For Enhanced Load Estimation, Aly Mousaad Aly
Faculty Publications
Solar panels are a cornerstone of renewable energy infrastructure, playing a pivotal role in global sustainability efforts. To ensure their resilience and long-term viability, accurate wind load estimations are essential for designing supporting structures, which account for nearly 50% of their total cost. However, traditional building codes lack comprehensive guidance for solar panels, resulting in inconsistent estimations due to discrepancies in scaled wall-bounded wind tunnel testing methodologies. These inaccuracies pose safety risks, increase costs, and hinder adoption. Emerging technologies like computational fluid dynamics (CFD) simulations offer a promising alternative by enabling full-scale analysis under realistic conditions of complete turbulence. This …
