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Articles 1 - 30 of 169
Full-Text Articles in Engineering
Development Of A Priority Ranking System For Bridge Rehabilitation And Replacement, Theodore Hopwood Ii, Vishwas G. Oka
Development Of A Priority Ranking System For Bridge Rehabilitation And Replacement, Theodore Hopwood Ii, Vishwas G. Oka
Kentucky Transportation Center Research Report
The main objective of this study was to review a Bridge Priority Ranking System for Bridge Replacement developed by the Kentucky Transportation Cabinet Division of Maintenance. The system ranked bridges for improvement (rehabilitation or replacement) based on a benefit/cost ratio.
The system was used to rank a large data base consisting of 267 bridges. Analysis of the rankings revealed that the ranking system gave priority to bridges having low improvement costs. Many of those had low traffic volumes and subsequently, they had high costs of improvement per vehicle served.
The equation used to compute bridge deficiency points was revised. Several …
Evaluation Of Wick Stabilization Of Approach Fill Foundation (Carroll County), Bobby W. Meade, David L. Allen
Evaluation Of Wick Stabilization Of Approach Fill Foundation (Carroll County), Bobby W. Meade, David L. Allen
Kentucky Transportation Center Research Report
The purpose of this study was to document construction procedures and evaluate the effectiveness of wick drains as a foundation stabilization method. This effort was executed by use of field inspections, photologs, and instrumentation to monitor foundation and field response. Instrumentation included a multipoint settlement gage, settlement platforms, and vertical slope inclinometers.
This procedure was judged to be successful in that 90 percent consolidation of the deep foundation occurred within approximately 100 days. Construction procedures were generally satisfactory.
Integrated Truck Monitoring System, Jerry G. Pigman, John A. Deacon
Integrated Truck Monitoring System, Jerry G. Pigman, John A. Deacon
Kentucky Transportation Center Research Report
The primary objectives of the study are as follows: 1) Develop functional specifications for an integrated truck monitoring system for use in Kentucky, 2) Determine the extent to which KYU numbers (unique identification for large trucks operating in Kentucky) are being displayed as required, 3) Examine the impact of the KYU numbering system on motor carrier operations, and 4) Determine the magnitude of the problems related to trucks using bypass routes to avoid inspection stations.
Accomplishments documented in this interim report include the following: 1) Field studies were conducted to determine the frequency of trucks bypassing inspection stations and compliance …
Noninteractive Macroscopic Reliability Model For Ceramic Matrix Composites With Orthotropic Material Symmetry, Stephen F. Duffy, Jane M. Manderscheid
Noninteractive Macroscopic Reliability Model For Ceramic Matrix Composites With Orthotropic Material Symmetry, Stephen F. Duffy, Jane M. Manderscheid
Civil and Environmental Engineering Faculty Publications
A macroscopic noninteractive reliability model for ceramic matrix composites is presented. The model is multiaxial and applicable to composites that can be characterized as orthotropic. Tensorial invariant theory is used to create an integrity basis with invariants that correspond to physical mechanisms related to fracture. This integrity basis is then used to construct a failure funciton per unit volume (or area) of material. It is assumed that the overall strength of the composite is governed by weakest link theory. This leads to a Weibull type model similar in nature to the principle of independent action (PIA) model for isotropic monolithic …
Investigation Of Flow Patterns In Various Wastewater Treatment Facilities, Thomas Joseph Martin Jr
Investigation Of Flow Patterns In Various Wastewater Treatment Facilities, Thomas Joseph Martin Jr
LSU Historical Dissertations and Theses
The theoretical hydraulic retention time of wastewater treatment plants is often used to predict the efficiency of treatment and to calculate operational parameters. However, these values are related to the actual hydraulic retention time. When there is a large discrepancy between the actual and predicted values, the actual hydraulic retention time can be determined by marking a parcel of wastewater and recording its passage through the system. This investigation utilized rhodamine WT, a fluorescent dye, to track the movement of wastewater through a stabilization lagoon and a rock-reed filter. The loss of rhodamine WT to sorption, biodegradation and photodegradation was …
Techniques For Improving Energy Efficiency At Water Supply Pumping Stations, Lindell Ormsbee, Thomas M. Walski, Donald V. Chase, Wayne W. Sharp
Techniques For Improving Energy Efficiency At Water Supply Pumping Stations, Lindell Ormsbee, Thomas M. Walski, Donald V. Chase, Wayne W. Sharp
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
This report describes the application of methods presented in Engineer Technical Letter (ETL) "Energy Efficiency at Water Supply Pumping Stations'' to the Washington, DC, and vicinity water system.
Both the ETL and this report were prepared under the Water System Operation, Maintenance and Rehabilitation Work Unit (CWIS 31794) of the Water Supply and Conservation Research Program. The technical monitors for this program in the Office, Chief of Engineers, were Mr. James Ballif (DAEN-ECE-B) and Mr. Robert Daniel (DAEN-CWP-D). The work was conducted at the US Army Engineer (USAE) Waterways Experiment Station (WES), Vicksburg, Miss., and the University of Kentucky (UK) …
A Model Ordinance For Erosion Control On Sites With Land Disturbing Activities, Herpicc
A Model Ordinance For Erosion Control On Sites With Land Disturbing Activities, Herpicc
Indiana Local Technical Assistance Program (LTAP) Publications
This model ordinance was developed by a task group composed of a county engineer, a county commissioner, county surveyors, land developers, and representatives of Indiana Department of Transportation, Indiana Department of Natural Resources, Indiana Farm Bureau, Indiana Department of Environmental Management, and Hoosier Heartland RC&D.
Evaluation Of Stone Column Stabilized Embankment Foundation, Bobby W. Meade, David L. Allen
Evaluation Of Stone Column Stabilized Embankment Foundation, Bobby W. Meade, David L. Allen
Kentucky Transportation Center Research Report
The purpose of this study was to document construction procedures, monitor field performance, and make recommendations as to the effectiveness and future use of the stone column procedure for foundation stabilization. This effort was executed by use of field inspections, photologs, instrumentation to monitor foundation and field response, and laboratory analyses of existing and possible conditions.
Instrumentation included earth pressure meters, a multipoint settlement gage, a horizontal slope inclinometer, a settlement platform, and vertical slope inclinometers. Settlement of the foundation after column construction was observed to be approximately 9 inches as compared to the predicted total settlement of 16 inches. …
Ordination And Mapping Of Wetland Communities In Nebraska's Rainwater Basin Region, Michael C. Gilbert
Ordination And Mapping Of Wetland Communities In Nebraska's Rainwater Basin Region, Michael C. Gilbert
US Army Corps of Engineers
Forty-seven Rainwater Basin wetlands of south-central Nebraska were evaluated to provide information on vegetation composition, species assemblages determined from direct and indirect ordination methodology, and community characteristics derived from wetlands mapping. Vegetation/soil relationships were evaluated from both vegetational stand and mapping data. Seasonal and year to year vegetation dynamics were evaluated for one study site, Harvard Marsh.
Ordination of vegetational data was accomplished by use of weighted averaging and detrended correspondence analysis. Weighted average ordination results indicated wetland status for the Fillmore, Scott and Massie soil series. Occurrence of upland vegetation on hydric soils and wetland vegetation on non-hydric soils …
Preliminary Engineering, Monitoring Of Construction, And Initial Performance Evaluation: Use Of Ponded Fly Ash In Highway Road Base, David Q. Hunsucker, R. Clark Graves
Preliminary Engineering, Monitoring Of Construction, And Initial Performance Evaluation: Use Of Ponded Fly Ash In Highway Road Base, David Q. Hunsucker, R. Clark Graves
Kentucky Transportation Center Research Report
This report summarizes findings of laboratory and field trial evaluations of ponded fly ash used as a component In a stabilized aggregate base course. Ponded fly ash is the fine portion of pond ash which is a by-product of a coal burning process and Is disposed by sluicing to a disposal pond.
Three stabilized aggregate base mixtures containing various proportions of dense graded aggregate, ponded fly ash, and hydrated lime were evaluated In the laboratory relative to maximum dry density, optimum moisture content, and unconfined compressive strength. The mixture that was selected for field trial evaluation had the highest unconfined …
Long-Term Evaluation Of Durable Lane Delineation Materials, Kenneth R. Agent, Jerry G. Pigman
Long-Term Evaluation Of Durable Lane Delineation Materials, Kenneth R. Agent, Jerry G. Pigman
Kentucky Transportation Center Research Report
The objective of this report was to summarize the long-term performance of several types of durable lane delineation materials. Polyester paint was determined to be an effective durable lane material with most use of this material being on asphaltic concrete surfaces having an average daily traffic of under 10,000. Extruded thermoplastic was also determined to be an effective durable lane delineation material with its cost limiting its use to higher volume asphaltic concrete surfaces. Either the hydrocarbon or alkyd thermoplastic formulation could be used but the alkyd formulation was observed to maintain a higher reflectivity. While not classified as a …
Appendix A: Presentation Of Roads Scholars, Calvin G. Grayson
Appendix A: Presentation Of Roads Scholars, Calvin G. Grayson
Kentucky's Annual Forum on Transportation
No abstract provided.
Appendix B: Riding High Today, Paige Daniel
Appendix B: Riding High Today, Paige Daniel
Kentucky's Annual Forum on Transportation
No abstract provided.
Appendix C: Index Of Participants, Kentucky Transportation Center
Appendix C: Index Of Participants, Kentucky Transportation Center
Kentucky's Annual Forum on Transportation
No abstract provided.
Kentucky's Transportation System [1989], Milo D. Bryant
Kentucky's Transportation System [1989], Milo D. Bryant
Kentucky's Annual Forum on Transportation
No abstract provided.
Transportation Finance In The Next Biennium, Merl M. Hackbart, James Ramsey, Michael R. Moloney, Joe Clarke
Transportation Finance In The Next Biennium, Merl M. Hackbart, James Ramsey, Michael R. Moloney, Joe Clarke
Kentucky's Annual Forum on Transportation
No abstract provided.
Safety Legislation: Concerns For 1990 General Assembly, Calvin G. Grayson, Nancy Foster, Ray Larson, Jerry G. Pigman, Willam M. Lear Jr.
Safety Legislation: Concerns For 1990 General Assembly, Calvin G. Grayson, Nancy Foster, Ray Larson, Jerry G. Pigman, Willam M. Lear Jr.
Kentucky's Annual Forum on Transportation
No abstract provided.
Accident Prevention At Rail Grade Crossings, Robert A. Wells
Accident Prevention At Rail Grade Crossings, Robert A. Wells
Kentucky's Annual Forum on Transportation
No abstract provided.
Safety Research—Needs And Funding Opportunities, David K. Phillips
Safety Research—Needs And Funding Opportunities, David K. Phillips
Kentucky's Annual Forum on Transportation
No abstract provided.
Law Enforcement And Engineering Incident Management—A Necessary Partnership: Commercial Driver's Licensing Law, Jerry L. Lentz, O. B. Arnold, Mickey Goff, Tim Hazlett, Joe Breeze
Law Enforcement And Engineering Incident Management—A Necessary Partnership: Commercial Driver's Licensing Law, Jerry L. Lentz, O. B. Arnold, Mickey Goff, Tim Hazlett, Joe Breeze
Kentucky's Annual Forum on Transportation
No abstract provided.
Law Enforcement And Engineering Incident Management—A Necessary Partnership: Incident Management, Jerry L. Lentz, James H. (Mike) Molloy, Sam W. Lester, Pat Dugger, William R. Monhollon, Robert L. Freeman, Mike Duncan
Law Enforcement And Engineering Incident Management—A Necessary Partnership: Incident Management, Jerry L. Lentz, James H. (Mike) Molloy, Sam W. Lester, Pat Dugger, William R. Monhollon, Robert L. Freeman, Mike Duncan
Kentucky's Annual Forum on Transportation
No abstract provided.
Highway Design—A Risky Business, Daniel S. Turner
Highway Design—A Risky Business, Daniel S. Turner
Kentucky's Annual Forum on Transportation
No abstract provided.
Design And Construction Of Safe Roads And Streets: Opening Remarks, O. Gilbert Newman
Design And Construction Of Safe Roads And Streets: Opening Remarks, O. Gilbert Newman
Kentucky's Annual Forum on Transportation
No abstract provided.
Design—A Beginning Step, Glen Kelly
Design—A Beginning Step, Glen Kelly
Kentucky's Annual Forum on Transportation
No abstract provided.
Standards—If We Don't Set Them, Juries Will, David C. Oliver
Standards—If We Don't Set Them, Juries Will, David C. Oliver
Kentucky's Annual Forum on Transportation
No abstract provided.
Looking For Wizards, Gene W. Childress
Looking For Wizards, Gene W. Childress
Kentucky's Annual Forum on Transportation
No abstract provided.
Designing Safe Roads: Who's Responsible?, Daniel S. Turner
Designing Safe Roads: Who's Responsible?, Daniel S. Turner
Kentucky's Annual Forum on Transportation
No abstract provided.
Intelligent Vehicle Highway System, John A. Deacon
Intelligent Vehicle Highway System, John A. Deacon
Kentucky's Annual Forum on Transportation
No abstract provided.
Keynote Address [1989], B. J. Campbell
Keynote Address [1989], B. J. Campbell
Kentucky's Annual Forum on Transportation
No abstract provided.