Engineering Commons^™

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. …

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 …

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 …

Soil Conservation Earthworks Design Manual, K J. Bligh

All other publications

In view of the great diversity of hydrological conditions encountered in the field, and the relative paucity of information with which to design soil conservation earthworks, it is frequently not possible to quantify all aspects of hydrologic design. It remains for the practising soil conservationist to search for a reasonable solution to a problem which is most appropriate to the situation, location, information and skills. The equations in this Manual provide the best available estimates of flow rates and volumes for carrying out design but it must be recognised that the information has come from a relatively limited data set, …

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

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.

Ordination And Mapping Of Wetland Communities In Nebraska's Rainwater Basin Region, Michael C. Gilbert

United States Army Corps of Engineers, Omaha District

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 …

Triggering In Trigatron Spark Gaps: A Fundamental Study, P. F. Williams, F. E. Peterkin

P. F. (Paul Frazer) Williams Publications

The trigatron has been in widespread use as a demand-triggered, high-voltage switch for more than 40 years. In spite of the popularity and maturity of the technology, there persists an uncertainty over the basic physical mechanism(s) responsible for triggering breakdown in the devices. We present the results of an empirical study of trigatrons that demonstrates that breakdown is initiated by a streamer launched from the trigger pin, independent of the trigger spark. We compare our results with those of previous workers, and discuss the generality of our conclusions.

Transient Stability Hierarchical Control In Multimachine Power Systems, A Rubbai, F. Eugenio Villaseca

Electrical and Computer Engineering Faculty Publications

The authors present the optimal transient stability control problem in a hierarchical structure for multimachine power systems. The two-level structure retains the local closed-loop controls, thereby easing its implementation on existing systems. The formulation accounts for nonlinearities and interconnections, and the optimization of the system transient performance is obtained with less computational effort. Since the computations are distributed among the many local feedback subsystems, the storage and solution times are considerably less than those required by a single overall centralized controller. This advantage becomes much stronger as the system size increases. For illustration purposes, this technique was applied successfully to …

Pronated Escape System For Fighter Aircraft, Allen D. Disselkoen Jr., Robert F. Gargiulo, James E. Haywood, Keith H. Heise, Darrell H. Holcombe, Stuart C. Kramer, Gregory R. Miller, Jeffrey S. Nicholson, Curtis H. Spenny

AFIT Patents

An improved aircraft ejection seat system is described which embodies a forward leaning position for an occupant of the aircraft providing enhanced acceleration tolerance for an occupant during ejection from the cockpit, comprising a platform supporting at a rearward end thereof a seat having a seat back and seat pan sized and configured for accommodating the occupant, a forwardly disposed cowling integral with and faired to the platform for providing windblast protection to the occupant, a solid or cushioned upright wall member disposed centrally of the platform and extending between the seat and cowling and supporting an inclined chest plate …

1989 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library

Scholars and Artists Bibliographies

This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti

Use Of Technology For Undergraduate Engineering Education, B. A. Black, J. S. Demetry, J. G. Harris, J. R. Jones

Electrical Engineering

California Polytechnic State University, Rose-Hulman Institute of Technology, University of Alabama at Birmingham, and Worcester Polytechnic Institute have formed a consortium to develop an alternative learning environment centered around a workstation comprised of a personal computer interfaced to a video disk and laboratory instrumentation. The first phase in their collective effort has involved the development of four instructional modules in the fundamentals of electrical engineering. The results of the first phase efforts are presented. They demonstrate how four different universities can work together to agree on standards, and to prepare instructional material that can be shared. The second phase will …

Acuta Enews October 1989, Vol. 18, No. 10

ACUTA Newsletters

In This Issue

One of the hottest topics among ACUTA members... Student Services

DO KNOW YOUR ACUTA REGION?

Message From The President

Focus on ACUTA News:

Then and Now

User Groups

Party Line

Tracer Gas As A Practical Field Diagnostic Tool For Assessing Duct System Leaks, Florida Solar Energy Center, James Cummings

FSEC Energy Research Center®

A methodology is presented for using tracer gas testing to detect and quantify duct leakage in homes. Since air is invisible, leakage of air from duct systems often remains undetected. Smoke sticks used in conjunction with blower doors are excellent diagnostic tools for detecting and locating leaks in the air distribution system. The tracer gas tests described are a good complement to these tools in the detection, location, and measurement of duct leakage.

Testing for house infiltration once with the air handler on and again with the air handler off indicates whether duct leaks exist. In many cases, it is …

Bodner-Partom Viscoplastic Constitutive Model And The Non Linear Finite Element Analysis Of A Stress Concentration At High Temperature, Faysal A. Kolkailah, A. J. Mcphate

Aerospace Engineering

The design and analysis of structural components to operate at elevated temperature and severe stress levels, such as a low-cycle fatigue-limited jet engine disk, require an accurate prediction of the nonlinear stress-strain . response encountered during the cyclic loading conditions. Nonlinear analysis of such components is normally carried out by a finite element code making use of constitutive theories in which the material response is separated into the two important groups of phenomena known as rate dependent "creep" and rate independent "plasticity." A number of viscoplastic. constitutive theories in which "creep" and ''plasticity" effects are combined _into a unified plastic …

Analysis Of Accident Data In Kentucky (1984-1988), Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

Kentucky has a systematic procedure to identify locations that have abnormal rates or numbers of accidents. This procedure utilizes average accident rates and numbers. A primary objective of this study was to determine average accident statistics in Kentucky. An annual safety program for Kentucky, which includes the identification, programming, budgeting, and evaluation of safety projects, is prepared each year. The data presented in this report may be included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

Average and critical accident rates were calculated by highway type for rural and urban highways. A summary of results and recommendations …

Breakaway Timber Utility Pole Installations In Kentucky, Ronald D. Hughes

Kentucky Transportation Center Research Report

This report describes the installation of ten breakaway timber utility poles in Lexington, Kentucky. Installations were made by Kentucky Utilities Company personnel and monitoring has been performed by Kentucky Transportation Center investigators. Retrofit hardware is described and locations of modified poles are detailed.

Modified poles have not been struck by vehicles to date. Monitoring will continue until September 1991 at which time a final report will be issued.

Construction And Inspection Report On Corrugated Polyethylene Pipe, N-12, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

Construction and performance evaluations of N-12 pipe. Construction procedures, and field observations are included.

Construction And Performance Evaluation Of Geocomposite Pavement Edge Drains Hydraway And Akwadrain, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

Construction and performance evaluations of Hydraway and Akwadrain edge drains are presented. Construction procedures, laboratory tests, and discharge data, are included.

Evaluation Of The Effects Of Asphalt Additives On Properties Of Class A Surface Mixtures, Kamyar C. Mahboub

Kentucky Transportation Center Research Report

Various modified asphalt mixture systems were selected for laboratory and field testing. These systems included the following asphalt mixtures: Class A mix, as the control mixture; Class N, which is a coarse mixture; polymerized Class A; polyester fiber; polypropylene fiber; and Vestoplast. Laboratory testing included: Marshall stability, resilient modulus, moisture susceptibility, tensile strength, and freeze-thaw. A field trial section was constructed for long-term performance monitoring.

Load Indicating Washers, Theodore Hopwood Ii, Edgar E. Courtney

Kentucky Transportation Center Research Report

Kentucky Transportation Center (KTC) personnel monitored the installation of load indicating washers (LIWs) on the US 60 bridge at Catlettsburg, KY during construction. On completion of the bridge, KTC personnel performed torque measurements on a number of LIW installations. LIWs previously installed on the Thirteenth Street Bridge over the Ohio River at Ashland, KY were also inspected.

The KTC construction inspections revealed no significant problems in installing LIWs. Workers were able to use them to determine proper bolt assembly installation. They also permitted inspectors to rapidly check for proper bolt tension. As with other bolt tensioning methods, LIWs had to …

Mountain Parkway Edge Drain Inspection (September 29-October 5, 1989), L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

On September 28, 1989, the Kentucky Transportation Cabinet requested the Kentucky Transportation Center (KTC) to investigate an apparent drainage problem on the Mountain Parkway. The area of concern was a rehabilitation project starting at Milepost 16 and ending at the Stanton exit (Milepost 22). The old PCC pavement was being broken and seated and then overlaid with approximately nine inches of asphaltic concrete. Longitudinal edge drains Advanedge and Contech Stripdrain 100 had been installed prior to the breaking and seating.

Pavement Base Evaluation Ky 55 Taylor County, R. Clark Graves

Kentucky Transportation Center Research Report

This report summarizes the findings of a field investigation of the aggregate underdrain system constructed on KY 55 in Taylor County. A detailed description of the construction of this project is presented in UKTRP Research Report 83-13 (Water Under Pavements).

Performance Of Corrugated Polyethylene Entrance Pipe, Ronald D. Hughes

Kentucky Transportation Center Research Report

Observations noted during inspections of 57 entrance pipe installations are summarized. Inspections were conducted in 1986 and 1989. It is recommended that corrugated polyethylene pipe be permitted routinely as an alternate to other materials for entrance pipe.

Study Of Loads On Four Box Culverts On The Alexandria - Ashland Highway, Bobby W. Meade, David L. Allen

Kentucky Transportation Center Research Report

Culverts on the Alexandria - Ashland Highway (AA Highway) were designed with modifications recommended in a 1984 report titled "Analysis of Loads and Settlements For Reinforced Concrete Culverts". In 1986, the Kentucky Department of Highways requested the Kentucky Transportation Center monitor selected culverts on the AA Highway. The objectives of this study were to compare predicted loads on the culverts to measured loads and to monitor differential settlement of the embankment near the culvert.

Four culverts with varied box dimensions and embankment heights were selected. Each of the four culverts was instrumented with earth pressure meters on the sidewalls and …

Test 1629: John Deere 4555 And 4560 Quadrange Diesel 16-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Test 1630: John Deere 4755 And 4760 Quadrange Diesel 16-Speed, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …

Accurate Calibration Of The Four-Detector Photopolarimeter With Imperfect Polarizing Optical Elements, R. M.A. Azzam, Ali G. Lopez

Electrical Engineering Faculty Publications

The first three columns of the instrument matrix A of the four-detector photopolarimeter (FDP) are determined by Fourier analysis of the output current vector I(P) as a function of the azimuth angle P of the incident linearly polarized light. Therefore 12 of the 16 elements of A are measured free of the imperfections of the (absent) quarter-wave retarder (QWR). The effect of angular beam deviation by the polarizer is compensated for by taking the average, (1/2) [I(P) + I(P + 180°)], of the FDP output at 180°-apart, optically equivalent, angular positions of the polarizer. The remaining fourth column of A …

Pesticide Movement And Water Management, Majid Ehteshami, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

Agricultural chemicals are essential components of agricultural production systems in the United states. Pesticides control weeds, insects, and have had an important role in increasing agricultural productivity in the last 50 years, despite diminishing crop land acreage. The benefits of chemicals use options in agriculture must be balanced against potential contamination of surface water and ground water resources. This study shows the effect of water management practices on pesticide movement and its potential pollution to ground water. It indicates that careful use of pesticides, water management practices and irrigation system design alternatives could cause a major reduction in ground water …

Water Resources Development Alternatives For The Mississippi Alluvial Plain In Eastern Arkansas, Gary L. Mahon, John E. Terry, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

Effective management of the water resources of the Mississippi Alluvial Plain in eastern Arkansas involves understanding the nature of existing problems, estimating total water demands, predicting how much of the total demand can be provided by the underlying aquifer and available surface-water sources, and deducing how much water must come from alternate sources. Various Federal and State agencies have cooperatively provided hydrologic information for the area to evaluate water-resources development alternatives ensuring that (1) the use of water from the aquifer be maximized while maintaining a minimum of 20 feet of saturated thickness, (2) the use of surface water be …