Effects Of Downdrag On Pile Performance,
2022
University of South Florida
Effects Of Downdrag On Pile Performance, Malaak Omelia Araujo
USF Tampa Graduate Theses and Dissertations
All soils settle under the weight of newly constructed embankments. In the case of MSE wall-type embankments, piles are driven prior to embankment construction. Under the weight of the newly constructed embankment, the soil surrounding the piles may settle more than the piles themselves. This downward movement potentially drags the piles down and induces a force within the pile known as downdrag. The research on the downdrag phenomenon involving cohesionless granular soils is sparse, thus the focus of this study is to investigate the effects of downdrag on pile performance driven in Florida sandy soils. A site consisting of soil …
The Impact Of Land Use Change On Hydrology Using Hydrologic Modelling And Geographical Information System (Gis),
2022
University of South Florida
The Impact Of Land Use Change On Hydrology Using Hydrologic Modelling And Geographical Information System (Gis), Nattachan Luesaksiriwattana
USF Tampa Graduate Theses and Dissertations
Surface and groundwater conditions in west-central Florida are highly interactive, with shallow water table and sandy soil. Land use types including forests, agricultural areas, and urbanization affect water resources differently. Change in land use, associated with expanding the urban environment to support human needs, significantly impacts surface water infiltration and runoff characteristics. Construction of infrastructures such as buildings and housing can result less water to infiltrate through the soil, with increased surface water runoff and decline in evapotranspiration. A computerized hydrologic model, Hydrological Simulation Program-FORTRAN (HSPF), couple to a spreadsheet groundwater model and a Geographical Information System (GIS) were applied …
Investigating Lateral Displacement Of Pile Groups Under Construction Loads And Excavation—A Case Study,
2022
The University of Texas Rio Grande Valley
Investigating Lateral Displacement Of Pile Groups Under Construction Loads And Excavation—A Case Study, Thang Pham, Andres Palma, Thuyet Nguyen, Thuy Vu
Civil Engineering Faculty Publications
Piles in weak soils are sensitive to adjacent excavation and construction loads. Excessive lateral displacement of piles during construction adds shear and bending moment to the piles. This is of great concern because these additional lateral loads are sometimes not accounted for when designing piles, and the horizontal bearing capacity as well as shear strength of the piles is low. This paper presents a case study of a recent project with severe pile damage and large soil displacement during construction due to the installation of adjacent piles and excavating foundation pits. With improper construction procedures, the piles were severely damaged …
Streamlining Project Development Through Planning & Environmental Linkages,
2022
CDM Smith
Streamlining Project Development Through Planning & Environmental Linkages, Karen Hadley, Brett Lackey
Purdue Road School
As transportation agencies continue to explore ways to be more efficient in the project development process, they are embracing integrated methodologies like planning and environmental linkages. This tool is practical, yet highly effective and inclusive, and teams across the country are experiencing its value. This presentation will highlight a variety of use cases, discuss lessons learned and best practices, and specifically address how planning and environmental linkages can be applied in Indiana and the Midwest.
Big Data Applications: Public Involvement Tools For Public Involvement,
2022
CDM Smith
Big Data Applications: Public Involvement Tools For Public Involvement, Amy L. Livingston, Houssam Ghandour
Purdue Road School
Using big data to better understand origin-destination and regional travel patterns is critical to project development. Tools such as passive geographically based data lead to improved definitions for traffic analysis zones (TAZs), which, in turn, help inform public involvement plans for a more targeted approach and improved equity. This presentation will highlight future planning applications in Indiana and other case examples where we have used big data to aid the plan development of public and stakeholder engagement.
Benthic Biolayer Structure Controls Whole-Stream Reactive Transport,
2022
Boise State University
Benthic Biolayer Structure Controls Whole-Stream Reactive Transport, Kevin R. Roche, Marco Dentz
Civil Engineering Faculty Publications and Presentations
Hyporheic zone reaction rates are highest just below the sediment-water interface, in a shallow region called the benthic biolayer. Vertical variability of hyporheic reaction rates leads to unexpected reaction kinetics for stream-borne solutes, compared to classical model predictions. We show that deeper, low-reactivity locations within the hyporheic zone retain solutes for extended periods, which delays reactions and causes solutes to persist at higher concentrations in the stream reach than would be predicted by classical approaches. These behaviors are captured by an upscaled model that reveals the fundamental physical and chemical processes in the hyporheic zone. We show how time scales …
Rail: Yesterday, Today, And Tomorrow In Indiana, Indiana State Rail Plan,
2022
INDOT
Rail: Yesterday, Today, And Tomorrow In Indiana, Indiana State Rail Plan, Vanetta Keffe, Keith Bucklew
Purdue Road School
The Indiana State Rail Plan is focused on improving the mobility, safety, economic development, and environmental stewardship of the state’s multimodal freight system. As the Crossroads of America, Indiana is home to 50 railroads, which deliver freight and Hoosiers to their destinations daily. This session focuses on the development of Indiana’s State Rail Plan and strategies to balance rail, trucking, and inland waterways as complementary modes that together represent the future of cost-efficient freight transportation.
Rehabilitation Of I-70 Composite Pavement Using Peel And Stick Strip Membrane & Geosynthetic Paving Fabric Interlayer,
2022
Indiana department of transportation
Rehabilitation Of I-70 Composite Pavement Using Peel And Stick Strip Membrane & Geosynthetic Paving Fabric Interlayer, Kumar P. Dave, Pankaj G. Patel
Purdue Road School
I-70 composite (asphalt over concrete) pavement is being rehabilitated using peel and stick membrane and geosynthetic paving fabric. The innovative rehabilitation technique is the first time peel and stick membrane is being used with geosynthetic paving fabric on the existing concrete pavement of the interstate. This combination retards reflective cracking and acts as a moisture barrier, which extends the service life of the treatment.
Understanding Effects Of Permafrost Degradation And Coastal Erosion On Civil Infrastructure In Arctic Coastal Villages: A Community Survey And Knowledge Co-Production,
2022
Missouri University of Science and Technology
Understanding Effects Of Permafrost Degradation And Coastal Erosion On Civil Infrastructure In Arctic Coastal Villages: A Community Survey And Knowledge Co-Production, Min Liew, Ming Xiao, Louise Farquharson, Dmitry Nicolsky, Anne Jensen, Vladimir Romanovsky, Jana Peirce, Lilian Alessa, Christopher Mccomb, Xiong Zhang, Benjamin Jones
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
This paper presents the results of a community survey that was designed to better under-stand the effects of permafrost degradation and coastal erosion on civil infrastructure. Observations were collected from residents in four Arctic coastal communities: Point Lay, Wainwright, Utqiaġvik, and Kaktovik. All four communities are underlain by continuous ice-rich permafrost with varying degrees of degradation and coastal erosion. The types, locations, and periods of observed permafrost thaw and coastal erosion were elicited. Survey participants also reported the types of civil infrastructure being affected by permafrost degradation and coastal erosion and any damage to residential buildings. Most survey participants reported …
Seismic Performance Design Criteria Of Existing Bridge Bent Plastic Hinge Region And Rapid Repair Measures Of Earthquake Damaged Bridges Considering Future Resilience,
2022
Portland State University
Seismic Performance Design Criteria Of Existing Bridge Bent Plastic Hinge Region And Rapid Repair Measures Of Earthquake Damaged Bridges Considering Future Resilience, A K M Golam Murtuz
Dissertations and Theses
The main objective of this research was to evaluate the seismic performance of existing sub-standard reinforced concrete (RC) bridge column-spread footing subassemblies and to quantify the material strain limits through a full-scale experimental program. A total of six column-footing test specimens with pre-1990 construction details were subjected to reverse cyclic lateral loading, utilizing a conventional three-cycle symmetric loading protocol and a protocol representing the demands expected from a CSZ earthquake. Additionally, the tests were designed so that variable axial loading could be applied to simulate the secondary load effects experienced during an earthquake in a column that is part of …
Implementation Of Secondary And Tertiary Treated Wastewater In Concrete Manufacturing,
2022
The British University in Egypt
Implementation Of Secondary And Tertiary Treated Wastewater In Concrete Manufacturing, Amany G. Micheal Prof., Haidy Abd El Salm, Gouda Ghanem Prof.
Centre for Advanced Materials
Water scarcity is a problem that faces many regions. In a developing and arid country like Egypt, the need for freshwater is exponentially increasing. This research is an evaluation of the recycled wastewater to be used in concrete manufacturing. The treated wastewater is blended with potable water with percentages of 25%, 50%, and 100%. The mixture of the two types of water is used in concrete mixing and curing. Control specimens with pure potable water are cast for comparison. The setting time for Ordinary Portland Cement is tested using the different water mixes. The hardened concrete is tested in compression …
Groundwater Level Modeling With Machine Learning: A Systematic Review And Meta-Analysis,
2022
Boise State University
Groundwater Level Modeling With Machine Learning: A Systematic Review And Meta-Analysis, Mojtaba Sadegh
Civil Engineering Faculty Publications and Presentations
Groundwater is a vital source of freshwater, supporting the livelihood of over two billion people worldwide. The quantitative assessment of groundwater resources is critical for sustainable management of this strained resource, particularly as climate warming, population growth, and socioeconomic development further press the water resources. Rapid growth in the availability of a plethora of in-situ and remotely sensed data alongside advancements in data-driven methods and machine learning offer immense opportunities for an improved assessment of groundwater resources at the local to global levels. This systematic review documents the advancements in this field and evaluates the accuracy of various models, following …
Copulas For Hydroclimatic Analysis: A Practice-Oriented Overview,
2022
Uppsala University
Copulas For Hydroclimatic Analysis: A Practice-Oriented Overview, Faranak Tootoonchi, Mojtaba Sadegh, Jan Olaf Haerter, Olle Räty, Thomas Grabs, Claudia Teutschbein
Civil Engineering Faculty Publications and Presentations
A warming climate is associated with increasing hydroclimatic extremes, which are often interconnected through complex processes, prompting their concurrence and/or succession, and causing compound extreme events. It is critical to analyze the risks of compound events, given their disproportionately high adverse impacts. To account for the variability in two or more hydroclimatic variables (e.g., temperature and precipitation) and their dependence, a rising number of publications focuses on multivariate analysis, among which the notion of copula-based probability distribution has attracted tremendous interest. Copula is a mathematical function that expresses the joint cumulative probability distribution of multiple variables. Our focus is to …
Defining Resilience, Robustness, And Vulnerability Metrics To Guide Facilities And Infrastructure Decision Making For The United States Air Force,
2022
Air Force Institute of Technology
Defining Resilience, Robustness, And Vulnerability Metrics To Guide Facilities And Infrastructure Decision Making For The United States Air Force, Kelly W. Minor
Theses and Dissertations
Tyndall AFB was nearly destroyed after a category five hurricane named Michael tore through the Florida panhandle in 2018. A Program Management Office was stood up to coordinate, plan, and carry out the rebuild efforts of Tyndall AFB. The office’s primary responsibility is “building a base capable of supporting a 21st-century mission while also focusing on structural resiliency and efficiency” (Laidlaw 2019). Despite the requirement to build a resilient infrastructure portfolio, the United States Air Force has yet to fully quantify and qualify measures of resilience, including robustness and vulnerability, in the context of their current built infrastructure portfolio. This …
Modeling Multimodal Access To Primary Care In An Urban Environment,
2022
Marquette University
Modeling Multimodal Access To Primary Care In An Urban Environment, Danielle Eden Del Conte, Amanda Locascio, Joseph Amoruso, Margaret L. Mcnamara
Civil and Environmental Engineering Faculty Research and Publications
Access to primary health care facilities is a key component of public health, and measuring that access is vital to understanding how to target interventions. Transportation is one dimension of access and measuring distance via multiple modes allows better understanding of how varied populations access health care, particularly those who do not have access to a personal vehicle. This work builds on the 2-Step Floating Catchment Area (2SFCA) method to include travel by car, bus, bicycle, and walking. Travel time data are sourced from OpenStreetMap and transit data incorporates stop and schedule information from the General Transit Feed Specification (GTFS). …
Investigating The Relationship Of Preventive And Corrective Maintenance In Chiller Assets Using Linear Regression Analysis,
2022
Air Force Institute of Technology
Investigating The Relationship Of Preventive And Corrective Maintenance In Chiller Assets Using Linear Regression Analysis, Jacob A. Franke
Theses and Dissertations
Asset managers must balance maintenance plans between preventive (PM) and corrective maintenance (CM). While PM plans have been a staple for decades, the benefits achieved have not been thoroughly examined at the asset specific level. This study focuses on the U.S. Air Force chiller portfolio to better understand the relationship between PM and CM, utilizing multiple stages of linear regression modeling and data from 14 US Air Force installations. PM and CM were found to be positively correlated, with PM accounting for relatively small portions of the variance experienced in CM. This study reveals the value of standardized data collection …
A Critical Review Of Climate Change On Coastal Infrastructure Systems,
2022
Air Force Institute of Technology
A Critical Review Of Climate Change On Coastal Infrastructure Systems, Gregory J. Howland Jr.
Theses and Dissertations
This thesis is a response to climate threats identified by DoD report on Climate Change in 2019. A critical review of climate change literature related to coastal infrastructure was conducted to synthesize past research and to inform future research. This review intends to inform how climate change may impact infrastructure systems, how those impacts are evaluated, can the investigation be improved, and what can stakeholders learn from the outcomes. The end goal is to find climate change mitigation strategies and adaptation measures, or identify the easiest path to get to that end. The compiled information will inform civilian and military …
Developing An Adaptable Best Value Contractor Selection Tool For Federal Construction Projects,
2022
Air Force Institute of Technology
Developing An Adaptable Best Value Contractor Selection Tool For Federal Construction Projects, Robert B. Kitson
Theses and Dissertations
Currently, there is no Air Force-wide best practice or standard for using an other-than lowest price source selection process for construction projects. Installations often award contracts using Lowest Price Technically Acceptable (LPTA) because of perceived cost and time savings. However, a heavy reliance on LPTA often leads to long-term decreases in quality and value. To allow the Air Force to receive the best value for its construction funding, a simple and adaptable tool was developed that allows installations to pursue contractor selection for construction projects by other-than lowest price methods. This research conducted a systematic literature review to obtain a …
A Scientometric Analysis Of Smart Sensors In Facility Management And Applications In Air Force Operations,
2022
Air Force Institute of Technology
A Scientometric Analysis Of Smart Sensors In Facility Management And Applications In Air Force Operations, Joseph-Thomas H. Lehotsky
Theses and Dissertations
To investigate the areas which smart sensors can be implemented to assist facility managers to optimize limited resources, this research consists of a scientometric analysis to identify the areas of research quantitatively and qualitatively. Existing literature related to smart sensors in facility management operations were compiled and trends were analyzed to determine the ways in which researchers have been applying this technology. The title, abstracts, and keyword were used to perform frequency, networking, and clustering analysis. This research effort serves to provide ways in which Air Force installations can implement smart sensors in a way which fulfills the initiatives posed …
A Post-Disaster Construction Portfolio Optimization Framework For Tyndall Afb Rebuild Post Hurricane Michael,
2022
Air Force Institute of Technology
A Post-Disaster Construction Portfolio Optimization Framework For Tyndall Afb Rebuild Post Hurricane Michael, Andre J. May
Theses and Dissertations
Natural disasters such as hurricanes, earthquakes, tsunamis, and extreme flooding cause severe social and economic disruptions. Restoration of social and revenue-generating services often requires extensive reconstruction, from the facility to the campus scale. For multi-facility portfolios, decision-makers must prioritize post-disaster reconstruction activities appropriately to ensure facilities and infrastructure are restored. In addition, any expansion or new construction initiatives are ideally completed in order of decision-maker and community preference. Most post-disaster optimization and decision framework research consider a single stakeholder as guiding decisions related to a project portfolio. However, these portfolio prioritization frameworks ignore the effect of multiple stakeholders and competing …
