Engineering Commons^™

Performance-Based Testing Of Chemical Stabilizers, Thomas M. Petry

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Chemical stabilizing agents have been introduced that have performed in field applications to improve the behavior of earth materials. The same agents and materials subjected to standardized laboratory tests have often resulted in no improvement. For example, the tests often require pulverization of materials to finer states than are needed in the field or may require remolding when field applications are done in situ, as with injection applications. Some of the physical tests do not place treated materials in a situation resembling conditions in the field, yet they are applied to determine the use of these agents. The experiences of …

University Of Missouri-Rolla Research On Cold-Formed Steel Structures, Wei Wen Yu, Roger A. Laboube

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

During the past 27 years, numerous research projects have been conducted at the University of Missouri-Rolla (UMR) under the sponsorships of the American Iron and Steel Institute, National Science Foundation, American Society of Civil Engineers, Metal Building Manufacturers Association, Steel Deck Institute, Metal/Lath Steel Framing Association, Chromium Center, Nickel Development Institute, and several steel companies located in the USA, Canada, and South Africa. The purpose of these investigations has been to study the structural strength of cold-formed steel members, connections, and structural systems. Some of the research findings have been used in the development of the AISI Specification for the …

Cold-Formed Steel Webs With Openings: Summary Report, Roger A. Laboube, Wei-Wen Yu, J. E. Langan, M. Y. Shan

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Based on a 3-year study that focused on the behavior of cold-formed steel beams with web openings, researchers at the University of Missouri-Rolla have developed simple, easy to apply design recommendations. The design recommendations address the limit states of web buckling resulting from bending, shear, web crippling, combined bending and shear, and combined bending and web crippling. The recommendations were developed based on the results of experimental and analytical studies of C-section beams. The C-sections, which are commonly used for wall studs and floor joists, are manufactured with web openings. Common web opening sizes are 38 x 102mm and 19 …

Additional Shear Wall Values For Light Weight Steel Framing, American Iron And Steel Institute

CCFSS Library (1939 - present)

No abstract provided.

Multiobjective Optimum Design Of Static And Seismic-Resistant Structures With Genetic Algorithm, Fuzzy Logic And Game Theory, Dan Li

Doctoral Dissertations

"The goal of this research is to develop a constrained multiobjective optimization method in the form of a robust, practical, problem-independent algorithm, and to investigate the effect of multiobjective optimization on structural design.

This research studies the properties and characteristics of multiobjective optimization and solutions. Design objectives, constraints and design variables as well as their effect on structural design and behaviors are investigated. Dynamic input energy for a multidegree-of-freedom structure is formulated. A multiobjective optimization algorithm based on game theory is developed. Fuzzy set theory is introduced to construct a fuzzy constrained environment. A Pareto genetic algorithm is developed based …

Capacity And Stiffness Of Bridge Abutments During Earthquakes, Rakesh K. Goel

Civil and Environmental Engineering

No abstract provided.

บทบรรณาธิการ

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

การออกแบบเรือพระที่นั่งนารายณ์ทรงสุบรรณ รัชกาลที่ 9

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

การออกแบบเรือดำน้ำ, อัณณพ ปาลวัฒน์วิไชย

Journal of Transportation and Logistics (TRANSLOG)

No abstract provided.

Evaluation Of Shrp Work Zone Safety Devices, Kenneth R. Agent, John O. Hibbs

Kentucky Transportation Center Research Report

The objective of this study was to use and evaluate various SHRP work zone devices. Experience with the use of these devices was obtained through trial use by the Kentucky Transportation Cabinet and various city, county, and private agencies. The devices included in the study included:

• Flashing Stop/Slow Paddle
• All-Terrain Sign and Stand
• Portable Rumble Strip
• Opposing Traffic Lane Divider
• Intrusion Alarm

The experience with the flashing stop/slow paddles was very positive indicating the potential for expanded use in the future. Six different models of flashing paddles were evaluated with some having better results than others. While the all-terrain stand …

Development Of Synthetic Soils For Sorption Mass Transfer Model Validation, Thomas P. De Venoge

Theses and Dissertations

Existing sorption models often fail to describe grain scale sorption because of an inability to define the diffusion domain. A proposed improved model required testing to determine model validity. The testing method used a synthetic media of known geometry such that the distribution of sorption sites was known. Sorption rate data was obtained using batch experiments with the media. Data was used in comparison against model predicted rates. Fined sorption site distributions were compared to real distributions obtained by controlling sorbent geometries. Comparison determined model performance in fitting known distributions. The focus of this study was to (1) determine what …

Habitat Suitability Mapping Through Integration Of Multicriteria Evaluation Techniques With A Geographic Information System (Gis), Anthony A. Ference

Theses and Dissertations

The presence of an endangered species, the Pacific Pocket Mouse (PPM), in critical Marine Corps training areas aboard Camp Pendleton may adversely affect training activities that are crucial to meeting the Marine Corps' mission. Camp Pendleton must focus limited budgetary assets for live trapping surveys of the PPM in the areas of best habitat suitability and the purpose of this study was to develop a PPM habitat suitability map of Camp Pendleton. Suitability maps were developed by integrating expert opinion with the Camp Pendleton Geographic Information System (GIS) database.

Economic Valuation Of Air Force Environmental Resources: A Contingent Valuation Case Study, Timothy P. Haynie

Theses and Dissertations

The Air Force spends $1 billion each year to preserve, maintain, and restore environmental resources under its control (Budget of the United States Government, 1994). Assessing the benefit of this spending is a central issue in federal environmental management. As federal environmental management moves from a "clean it up at any cost" mentality to one which carefully considers the costs and benefits of spending, a fundamental question arises: What value of environmental resources does our environmental spending provide? As in any rational economic exchange benefits must exceed costs; the value of an environmental resource which benefits from public spending must …

Study Of Desorption Of Contaminant From Synthetic Soil, Kung-Fu Hwang

Theses and Dissertations

A better understanding of sorption and desorption processes could improve estimates of time and cost required for remedial activities, exposure times and health risk, and bioavailability. Conventional rate-limited sorption models do not accurately define the diffusion domain at the grain scale. Heyse (1994) proposed the multiple sites in series (MSS) model, which allows more general description of the geometry of the sorption domain than the classical spherical or discrete distributions. A version of this model was tested by deVenoge (1996). The model was able to accurately simulate sorption rate data, but could not estimate unique geometry parameters. This research is …

A Comparative Analysis Of Two Alternatives To Chemical Aircraft Paint Stripping, George P. Joyce Ii

Theses and Dissertations

The Air Force must periodically strip and paint its aircraft to prevent the damaging effects of corrosion. The paint removal process typically involves the use of toxic chemicals such as methylene chloride which are soon to be banned as a result of impending environmental regulations and increased costs associated with handling and disposing of such material. The Air Force must choose an alternative to methylene chloride chemical stripping which complies with environmental regulations and reduces costs. This thesis compares the life cycle costs and environmental impacts of two alternatives to chemical aircraft stripping. Plastic Media Blasting (PMB) and Modified Medium …

Modeling Plant Uptake Of Metal In Constructed Wetlands Supported By Experimentally Derived Uptake Rates, Michael B. Peake

Theses and Dissertations

Many communities and Air Force installations are using constructed wetlands to filter trace metals from their stormwater runoff. Constructed wetlands are attractive to industry for runoff mitigation because they are relatively cheap to build and operate and require little or no energy for operation. The purpose of this research project is to develop quantitative concepts for understanding the dynamics of metal uptake in constructed wetland plants by constructing a system dynamics model supported by experimental observation and offer environmental managers a tool to simulate, under a broad range of conditions, long term wetland exposure to stormwater runoff contaminated with trace …

Investigation Of Sorption Mass Transfer Models Using Synthetic Soils, Karla K. Mika

Theses and Dissertations

Grain-scale sorption mass transfer is an important process that must be considered when predicting clean-up time and choosing remediation techniques for subsurface hazardous waste contamination. Rate-limited sorption is responsible for the rebound effect, where remediated groundwater is recontaminated by desorption. Sorbed contaminants are not available for microbial degradation, and the desorption rate may govern the effectiveness of natural attenuation by biodegradation. Grain-scale sorption nonequilibrium is generally attributed to diffusive transport, either in SOM or in mineral micropores. Typically used sorption mass transfer models either fail to reproduce long-term slow desorption (first-order models), or are based on diffusion in assumed (often …

Environmental Restoration Project, Peer Review Process Assessment, Paul A. Schantz

Theses and Dissertations

Installation Restoration Program (IRP) projects often cost over $250 thousand, and projects over $1.5 million are common. To ensure these projects are risk based, technically sound, and cost effective, the Air Force instituted a peer review program in 1992. The objective of this research is to describe and analyze the peer review process. Through triangulation of data from interviews, observations, official and academic documents, and surveys, seven constructs were discovered: focus, agenda, facilitator, written preparation, oral presentation, team characteristics, and reviewer characteristics. A questionnaire was used to gather perceptions of peer review effectiveness--the criterion variable--and of the seven constructs. A …

Applicability Of Angle Parking For A Major City Street, Jerry G. Pigman, Samantha S. Jones

Kentucky Transportation Center Research Report

No abstract provided.

Evaluation Of Incident Management Techniques (Lexington, Kentucky), Kenneth R. Agent, Jerry G. Pigman, Nikiforos Stamatiadis, Eugene Culton

Kentucky Transportation Center Research Report

The objective of this project was to evaluate and document the various incident management techniques used by the Lexington Fayette Urban County Government (LFUCG) to alleviate the impact of incidents on highways in Fayette County. Components included in the evaluation included: 1) establishment and use of traffic diversion routes, 2) use of variable message signs, 3) use of detour signing, 4) use of arrow board signs, 5) improvement of existing incident detection and verification through enhanced computerized mapping, 6) use of linked motion detection equipment, and 7) development of a public information program. The methods used to incorporate each of …

Evaluation Of Red Light Running Campaign, Kenneth R. Agent, Deborah Wagner

Kentucky Transportation Center Research Report

The purpose of this project was to use a public information and education campaign, along with increased enforcement, to reduce the problem of red light running (RLR) in Lexington, Kentucky. The objective of this portion of the project was to evaluate the effectiveness of the campaign.

The mail and telephone surveys, taken before and after the campaign, revealed that the RLR program had been successful in improving public awareness of the problems associated with disregarding traffic signals. About 60 percent of the respondents recalled seeing or hearing ads or information dealing with red light running. Approximately one-half of the respondents …

Survey Of High School Driver Safety Programs, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The over representation of teenage drivers in traffic collisions has been a cause of concern and the basis for the recent graduated license legislation. A subcommittee of the Safety Management System has the objective of improving teenage driver safety through development and implementation of education and training programs. The objective of this study was to obtain information on current and desired traffic safety related programs for high schools. A survey was sent to all high schools. Information was obtained from 189 of 432 schools. Current activity in the area of traffic safety was summarized. The activity with the most participation …

Evaluation Of A Regional Traffic Safety Improvement Program, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objectives of this report were to document the activities and evaluate the effectiveness of a regional traffic safety improvement program in the Green River Area Development District (GRADD). This is a seven county region in western Kentucky. The goals of the program were to reduce the numbers of motor vehicle fatalities and injuries, to increase safety belt usage, and to increase public awareness of the effects of alcohol-related and high speed driving in rural areas.

A full-time employee was hired by GRADD to manage the program. A Citizen Advisory Board (CAB) was established in each county. Each CAB formulated …

A Cultural Resource Investigation Of Two Louisiana-Pacific Corporation Parcels, Susie Van Kirk

Susie Van Kirk Papers

During the month of October, November, and December 1996, a Cultural Resources Investigation was conducted on two Louisiana-Pacific Corporation parcels located at Big Lagoon, Humboldt County, California (see Map 1). The survey was requested by Jamie Heltsley of Ron Hunt Surveying & Forestry, Arcata, California. Proposed project plans include the combining of four separate assessors parcels into two assessor's parcels.

The purposes of this investigation were to (1) locate and record project area cultural resources; (2) to evaluate the significance of study area cultural resources; (3) to assess potential impacts to cultural resources resulting from project related operations; (4) to …

Preliminary Evaluation Of The Effects Of A Pumping Well On Existing Surface Water Resources Located In T. 12n, R. 2e, Sec. 23, Cache And Box Elder Counties, Denny J. Johnson, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

This report contains the results of a preliminary study of the impact of pumping a well located in T. 12N, R. 2E, sec. 23, Cache and Box Elder Counties, Utah. A semianalytical capture zone analysis was performed to determine if pumping at the well is likely to reduce flow in Willow Creek or any of three springs in the surrounding area. The well has been used from 1974 to present and is sometimes pumped at 90 gallons per minute (gpm) (verbal communication, Veibell, 1996).

Strength Of Flexural Members Using Structural Grade 80 Of A653 Steel (Deck Panel Tests), Shaojie Wu, Wei-Wen Yu, Roger A. Laboube

CCFSS Library (1939 - present)

This second progress report describes the design of deck panel specimens for flexural tests and presents the test results of ninety-three deck panel specimens. The deck panels consisted of single and multiple hat-shaped ribs in their cross sections and were manufactured from 28, 26, and 22 gage steel sheets of Structural Grade 80 of ASTM A653 Steel. Among the ninety-three deck panel specimens, seventy-two panels were tested in simply supported and two-point loading conditions; sixteen panels were tested in simply supported and one-point loading conditions; and five panels with screws penetrating through tension flanges were tested in simply supported and …

Development Of Site Characterization Simulator Specifications, Jeffrey L. Heiderscheidt

Theses and Dissertations

The purpose of this study was to develop a tool for evaluating data quality when characterizing a potentially contaminated groundwater aquifer, and to provide a basis for developing a simulator to allow environmental managers and engineers to practice and learn about the site characterization process. Specifically, this study characterized the uncertainty, estimation block size, and cost for the various methods of determining the value of each geological, hydrological, and contaminant parameter necessary to characterize a site. Research entailed identifying site characterization objectives and identifying parameters necessary to obtain those objectives. Methods of estimating each parameter were identified, then research was …

Membrane Analogy For Saint-Venant Torsion: New Results, Stephen M. Heinrich

Civil and Environmental Engineering Faculty Research and Publications

The Saint-Venant torsion problem for a twisted shaft may be formulated in terms of the Prandtl stress function (PSF) or the conjugate warping function (CWF), each of which may be interpreted as the transverse deflection of a thin membrane via the well-known membrane (soap-film) analogies. The deflection of the PSF membrane is associated with a uniform transverse pressure loading, whereas the CWF membrane is nonpressurized—its deformation is due solely to imposed deflections along its edge. The utility of the PSF analogy stems from the simple relationships that exist between the geometry of the deformed membrane (slope, enclosed volume) and the …

Use Of Audible Pedestrian Signals, Kenneth R. Agent

Kentucky Transportation Center Research Report

Audible pedestrian signals are a device used to provide additional traffic control at signalized intersections to aid visually impaired pedestrians. An objective of this study was to determine the status of the use of this device and investigate possible guidelines for possible future installations of audible pedestrian signals in Kentucky. Another specific objective was to investigate the need for such signals at a number of intersections at the University of Kentucky.

The study showed that audible pedestrian signals can be used to supplement the standard pedestrian signals. However, their use must be limited to intersections with a demonstrated need and …

On Hack's Law, Riccardo Rigon, Ignacio Rodriguez-Iturbe, Amos Maritan, Achille Giacometti, David G. Tarboton, Andrea Rinaldo

Civil and Environmental Engineering Faculty Publications

Hack's law is reviewed, emphasizing its implications for the elongation of river basins as well as its connections with their fractal characteristics. The relation between Hack's law and the internal structure of river basins is investigated experimentally through digital elevation models. It is found that Hack's exponent, elongation, and some relevant fractal characters are closely related. The self-affine character of basin boundaries is shown to be connected to the power law decay of the probability of total contributing areas at any link and to Hack's law. An explanation for Hack's law is derived from scaling arguments. From the results we …