Engineering Commons^™

Irish H & V News

Building Services Engineering

No abstract provided.

Vilma (Virtually Interactive Large Scale Model For Arkansas), Rosalinda R.A. Cantiller, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

This user’s guide supports the use of VILMA (Virtually Interactive Large-scale Model for Arkansas). This document presents the basic concepts in Chapter I. Chapter II discusses the execution steps that the user follows during a VILMA session. Chapter III provides a detailed illustration of example data files. Chapter IV presents two example VILMA sessions. Finally, Chapter V elaborates on additional concepts. The Appendices consist of relevant program listings, instructions, and example files. In this user’s guide, the word "interactive" means the user enters his responses to the prompts that appear on a computer terminal while he is logged on to …

An Analysis Of The Abaca Natural Fiber In Reinforcing Concrete Composites As A Construction Material In Developing Countries, Rolando V. Magdamo

Dissertations and Theses @ UNI

This study was undertaken to analyze the flexural and splitting tensile strengths and the ductility of abaca fiber-reinforced concrete composites. Abaca fibers are natural fibers of vegetable origin prepared from the abaca plant which is a native plant of the Philippine Islands. The purpose of the study was to investigate how various volume-fractions of the abaca fiber in the concrete mix could affect the mechanical properties of the concrete matrix.

A concrete design mix containing a volume ratio of 1.0 part Type I Portland...cernent and 3.0 parts sand was utilized in the preparation of laboratory test samples. Abaca fibers were …

Great Salt Lake Interisland Diking: Water Quality Considerations, Executive Summary, Utah Water Research Laboratory, J. P. Riley, J. I. Blandamer, W. J. Doucette, R. R. Dupont, A. W. Grover, J. Herrick, J. M. Ihnat, J. E. Mclean, M. W. Nath, S. R. Rushforth, J. L. Sims, R. C. Sims, W. A. Wurtsbaugh

Reports

No abstract provided.

Stochastic Interpolation Of Precipitation Data From Multiple Sensors, D. J. Seo, A. Azimi-Zonooz, D. S. Bowles, W. F. Krajewski, C. J. Duffy, K. P. Georgakakos, T. H. Lee

Reports

Introduction: This report summarizes the work conducted under Grant No. ECE-8419189, "Stochastic Interpolation of Precipitation Data from Multiple Sensors," which was awarded to Utah State University in September, 1985, and completed February 29, 1988. it also covers work under a supplemental award made in February, 1986. The final report is organized into four sections. The following section presents the objective of the research and a brief problem statment. Section 3 contains a summary of second-year work including the project team, work plan, work completed, and publications. In Section4, project conclusions are summarized. A summary of on-going future work is given …

Great Salt Lake Interisland Diking: Water Quality Considerations, John I. Blandamer, William J. Doucette, Ryan R. Dupont, Anthony W. Grover, James Herrick, Jean M. Ihnat, Joan E. Mclean, Michael W. Nath, Samuel R. Rushforth, Judith L. Sims, Ronald C. Sims, Wayne A. Wurtsbaugh

Reports

No abstract provided.

Friction Factor Tests On High Density Polyethylene Pipe, Steven L. Barfuss

Reports

No abstract provided.

The Distribution Of Chlorine And Iodine In Soil In The Vicinity Of Lead Mining And Smelting Operations, Bixby Area, S.E. Missouri, U.S.A., R. Fuge, M. J. Andrews, T. E. Clevenger, B. E. Davies, Nord L. Gale, C. F. Paveley, B. (Bobby) G. Wixson

Biological Sciences Faculty Research & Creative Works

Iodine and Cl are enriched in soils in the vicinity of the Magmont and Buick lead mines near Bixby, southeastern Missouri. The enrichments, up to 5.6 ppm I and 305 ppm Cl, are against regional background of 1.26 ppm I and 41 ppm Cl. The area of highest I and Cl is thought to reflect a zone of base metal sulphide mineralization occurring about 400 m below the surface. Iodine and Cl are also enriched in soils immediately adjacent to a tailings pond, hence these elements would appear to be leached from this source. A zone of enhanced I values …

Dynamic Timoshenko Beam-Columns On Elastic Media, Franklin Y. Cheng, Chris P. Pantelides

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Differential equations, stiffness coefficients, and fixed-end forces are formulated for a Timoshenko beam-column on an elastic foundation subjected to lateral time-dependent excitations and static axial loads. The theoretical formulation includes shear and bending deformations as well as rotatory inertia, with emphasis on two approaches. The two approaches differ in terms of the assumed shear component of the static axial load on the cross section. The first approach is based on the assumption that the shear component of the axial load is calculated from the total slope; in the second approach, the shear component of the axial load is calculated only …

Static Timoshenko Beam-Columns On Elastic Media, Franklin Y. Cheng, Chris P. Pantelides

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Two approaches are used to derive differential equations, stiffness coefficients, and fixed-end forces for the analysis of structural systems composed of Timoshenko beam-columns that may be supported by an elastic foundation. The analysis is for the evaluation of the critical static axial load and buckling mode-shapes of a structure with consideration of elastic media, bending, and shear deformations. The two approaches differ in terms of the assumed shear component of the static axial load on the cross section. The first approach is based on the assumption that the shear component of the axial load is calculated from the total slope, …

Approximate Methods For Analysis And Design Of Channel And Tee Shaped Reinforced Concrete Columns Under Axial Compression And Biaxial Bending, Chayan Bhattacharyya

Theses

Combined Bending and Axial Compression for irregular shaped (such as L-shaped, Channel shaped, T-shaped) reinforced concrete short column is a common design problem. Current code provisions and the available design aids do not offer an insight into the determination of strength and ductility of biaxially loaded reinforced concrete columns. The reason is that the information on the behavior of irregular shaped reinforced concrete members under combined biaxial bending and axial load is not well known. They are usually overdesigned and this may cause the structure to be stiffer, which may result in loss ductility when applied to seismic regions. Thus …

Application Of Computer Techniques In Groundwater Contamination Studies, Komratchi Raman

Theses

A study has been undertaken to provide insight into two related aspects of groundwater contamination studies - contaminant transport behavior and its analysis by modeling techniques. The study reviews recent research that explains some of the uncertainties in the transport and fate of chemical contaminants in groundwater. Approaches to modeling techniques and data reduction are developed to illustrate their usefulness in analysing existing groundwater data, and to make predictions on the future water chemical characteristics. Three types of study areas have been chosen for this purpose, each representing a different type of groundwater contamination problem. The first study area has …

Hyperbolic Soil Parameters For Granular Soils Derived From Pressuremeter Tests For Finite Element Programs, Dieter Neumann

Dissertations and Theses

In the discipline of geotechnical Engineering the majority of finite element program users is familiar with the hyperbolic soil model. The input parameters are commonly obtained from a series of triaxial tests. For cohesionless soils however, today's sampling techniques fail to provide undisturbed soil specimen. Furthermore, routine triaxial tests can not be carried out on soils with grains exceeding 10 - 15 mm in size.

Initial developments towards a link between high quality pressuremeter tests and the hyperbolic finite parameters element input are presented. Theoretical and empirical approaches are used to determine the entire set of and from pressuremeter tests. …

Evaluation Of Unmanned Radar Installations, Jerry G. Pigman, Kenneth R. Agent, John A. Deacon, Richard J. Kryscio

Kentucky Transportation Center Research Report

Several unmanned radar devices were installed on I75 in northern Kentucky in an attempt to reduce speeds. It was assumed that drivers use radar detectors to exceed the speed limit with a resulting variance between their speeds and others in the traffic stream. Therefore, a reduction in overall speeds and variance was expected to reduce the probability of accidents. Historical data indicated an unusually high accident rate for the study area.

Emphasis was placed on collection and analysis of speed-related data. In addition, a survey of radar detector usage was made and accident patterns were documented.

Speed measures analyzed included …

Irish H & V News

Building Services Engineering

No abstract provided.

Separation And Characterization Of Biologically Significant Chemical Classes In Airborne Particulate Organic Matter : Measurement Of Selected Chemical Classes In Freshly Collected Air Samples, Xueying Sun

Theses

Since hazardous materials present in airborne pollutants can affect human health and environmental quality and most of the specific compounds remain uncharacterized, a study was conducted to characterize airborne particulate extractable organic matter (EOM) with respect to chemical composition. Specifically, a number of chemical classes including N-heterocycles, phenols, quinones, carboxylic acids, and especially N-nitrosamines were tested using an integrated chemical class screening system.

The inhalable particulate matter was collected, using a high volume 10 um inlet sampler, on the roof of Tiernan Hall, New Jersey Institute of Technology, which is located off Warren Street in Newark. Sequential solvent extractions yielded …

Traffic Volume Estimates And Growth Trends, John A. Deacon, Jerry G. Pigman, Ahmad Mohsenzadeh

Kentucky Transportation Center Research Report

The objective of this study was to develop a procedure to forecast highway traffic volumes through the use of growth factors representative of Kentucky highways and reflecting effects of important socioeconomic and demographic variables. A two-stage modeling process was used. In the first, linear regression models were used to relate average daily travel on Kentucky roadways to personal income, price of fuel, and total miles of streets and highways. In the second, cross-tabulation models were used to relate growth in volume at a specific site--expressed relative to the statewide ADT--to highway functional classification rural/urban location, county population growth, SMSA/non-SMSA designation, …

Native Aggregates For Skid Resistance, Scott P. Hall, David Q. Hunsucker, David L. Allen, Gary W. Sharpe

Kentucky Transportation Center Research Report

The objectives of the study were 1) to identify sources of native aggregates with varying histories of skid resistance performance; 2) to evaluate and correlate native aggregate characteristics, processing techniques, and other factors with skid resistance and surface mixture performance; and 3) to provide guidelines for implementation of research findings. Limestone, sandstone, river gravel, and control aggregates (granite, traprock, and slags) were subjected to a battery of tests to determine physical relationships between aggregate type and skid resistance.

Laboratory results were analyzed for correlations among themselves and for correlations with skid number data obtained from pavements containing aggregates involved in …

Breaking And Seating Of Rigid Pavements, Gary W. Sharpe, Mark Anderson, Robert C. Deen

Kentucky Transportation Center Research Report

Breaking and seating has been utilized extensively in Kentucky to rehabilitate portland cement concrete pavements. Experience over three or four years with this type of design and construction are summarized and reported. Breaking to a range of nominal fragments is evaluated. Evaluation of two roller weights for seating is reported. The use of dynamic deflections to evaluate the effectiveness of the breaking and seating process and to measure the appropriateness of the asphaltic concrete overlay.

Evaluation Of Wick Drain Stabilization Of Approach Fill Foundation (Bullitt County), Bobby W. Meade, David L. Allen

Kentucky Transportation Center Research Report

The purpose of this study was to document the construction procedures and evaluate the effectiveness of wick drains as a foundation stabilization method. Field data was primarily obtained from field surveys and penumatic piezometers installed in the approach foundation.

Construction procedures used have been determined to be generally acceptable. The wick drains appear to have effectively dewatered the foundation during embankment construction.

Evaluation Of Asphalt Additive -- Chemkrete, L. John Fleckenstein, David L. Allen, Gary W. Sharpe, Scott P. Hall, David Q. Hunsucker

Kentucky Transportation Center Research Report

Construction, performance, and cost-effectiveness evaluations of an AC-10 treated with Chemkrete (CTI-101) and an untreated AC-20 are presented. Laboratory tests, and field tests which include marshall stability, density test, repeated load test, road-ratter deflection data, and visual observation are summarized.

Because of the apparent failure of Chemkrete to significantly enhance the performance of the pavement, and the additional cost for the use of Chemkrete, it would not be recommended for further use in the state of Kentucky.

Modifications To Chevron N-Layer Computer Program, Herbert F. Southgate, Robert C. Deen, David Cain, Jesse G. Mayes

Kentucky Transportation Center Research Report

This report documents changes made to the Chevron N-layer computer program to:

1. Include superposition principles.
2. Calculate strain energy density (or work) at specified locations within the pavement structure.
3. Analyze pavement response at specified radii from one circularly loaded area to permit comparison of analyses by the program as originally written with results incorporating superposition principles.
4. Evaluate pavement response to any combination of loads on circular areas defined by XY coordinates on the surface. Loads and contact pressures are permitted to be different from one loaded area to another, but must be constant for any one loaded area.
5. Simulate dynamic loads …

Laboratory Analysis Of Failed Asphaltic Concrete Surface -- Us 23, Lawrence County, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

Laboratory analyses of a failed asphaltic concrete surface are presented. Construction procedures, mix design data, density tests, repeated load tests, asphalt extraction tests, and gradation tests are summarized.

Pavement Designs Based On Work, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

Thickness design curves presented in the report provide a systematic methodology for the selection of equivalent pavement designs for a broad range of layered systems. This is a unified system since the failure criteria are founded on the same concept of work strain and work. The analyses of stress-strain fields in the layered systems are based on elastic layered theory. This theory is represented by the Chevron N-layered computer program.

The report also summarizes the historical development and evolution of pavement design in Kentucky.

Reliability Assessment Of High-Risk Steel Bridges By Nondestructive Test Methods, Theodore Hopwood Ii, Vishwas G. Oka, Robert C. Deen

Kentucky Transportation Center Research Report

Fatigue-crack related failures of high-risk (fracture-critical) steel bridges may be prevented through application of nondestructive tests (NDT). Economical reliability assessment of those structures requires 1) application of a suitable NDT method, 2) testing of fatigue-susceptible members, and 3 ) periodic retests of those members to preclude problems with growing or previously undetected flaws.

Six conventional NDT techniques were tested in the laboratory using buttweld configured specimens having intentionally embedded cracks. Those NDT methods were 1) visual inspection, 2) magnetic-particle testing, 3) dyepenetrant testing, 4) florescent-enhanced surface testing, 5 ) eddy-current testing, and 6) ultrasonic testing. The other NDT methods provided …

A Survey Of States' Aggregate Soundness Specifications And Test Methods, David Q. Hunsucker

Kentucky Transportation Center Research Report

This report summarizes findings of a national survey to determine aggregate durability test methods and specification requirements of the various states. Also included are specifications and test methods concerning allowable shale contents in aggregates and requirements for percentages of crushed particles in aggregates.

Effects Of Hysteresis With Air Entrapment On Water Flow In The Unsaturated Zone, Jagath J. Kaluarachchi, J. C. Parker

Civil and Environmental Engineering Faculty Publications

Effects of hysteresis with air entrapment on water content and head distributions, surface fluxes, and water balance components are investigated by finite element simulations of flow in one- and two-dimensional spatial domains. Results of one-dimensional analyses indicate that effects of hysteresis are markedly influenced by surface boundary conditions and to a lesser extent by initial conditions. Stipulation of flux-controlled boundary conditions results in minimal hysteretic effects, while potential-type boundary conditions produce substantial deviations between hysteretic and nonhysteretic simulations. The latter effects are attributable in large part to differences in surface conductivity associated with air entrapment. Predicted water content distributions for …

Irish H & V News

Building Services Engineering

No abstract provided.

Computer-Aided Analysis And Design Of Rectangular Buried Tank Walls And Its Safety Factor Evaluation Based On Yield Line Analysis, Rakiya J. Fatoohi

Civil & Environmental Engineering Theses & Dissertations

This thesis presents the results of a study that determines the true safety factor of underground square reinforced concrete tank walls.

The walls are analyzed and designed by elastic method. The amount and distribution of the reinforcement was determined by use of the alternate design method (working stress) in compliance with all ACI code requirements. The wall's ultimate moment was computed by use of yield line theory assuming non-isotropic reinforcement. The ultimate value of the earth pressure was computed and compared with the elastic analysis and design values to give the true safety factor.

The results of this study indicate …

Degradation Of Aniline And Nitrobenzene In A Photoreactor, Michael Joseph Sowa

Theses

Degradation of aniline and nitrobenzene in aqueuous solutions was studied. Five reaction processes were utilized, including ultraviolet light, ozone, O₂/UV, O₃/O₂/UV, and H₂O₂/UV. A 30 liter semi-batch gas sparged reactor was used for the development of reaction rate and mass transfer parameters in these systems. The results were used to model a continuous stirred tank reactor (CSTR) for the O₃/O₂/UV case. Reasonable agreement was obtained for steady state exit concentrations between the experimental data and those predicted from the model.