Civil and Environmental Engineering Commons^™

Criteria For Connection Spacing In Cold-Formed Steel, Muzaffer Yener

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

European Recommendations For Mechanical Connections In Thin-Walled Structural Steel Elements, A. W. Toma

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Reliability Verification Using Service Loads, Brent W. Hall, Andrzej S. Nowak

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Buckling Of Plates Containing Openings, Fong-Yen Chow, Rangachari Narayanan

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Inelastic Torsional-Flexural Buckling Of Cold-Formed Open Section Under Eccentric Load, Jang Dejin, Chen Shaofan

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Shear Resistance Of Steel Stud Wall Panels: A Summary Report, Thomas S. Tarpy Jr.

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.

Irish H & V News

Building Services Engineering

No abstract provided.

Self-Flushing Piston Assembly For Slurry Pump, David T. Kao

Civil Engineering Faculty Patents

A slurry pump is provided having a self-flushing piston assembly mounted in a mating cylinder. The piston assembly includes a first piston having a peripheral sealing member and a reciprocating piston rod for driving the first piston for pumping action. A second piston mounted adjacent to the first piston includes a sealing member and forms an enclosed chamber with the first piston. A lost motion coupler connects the pistons together and varies the size of the chamber. On the return stroke of the piston assembly, flushing liquid on the non-slurry side is sucked into the chamber as the chamber expands. …

Pavement Cuts For Utilities - A Guide For Their Management, James Mabry Iddins, Charles F. Scholer

Indiana Local Technical Assistance Program (LTAP) Publications

A manual of street cut methods that have worked well for several states, cities & counties.

Pavement Cuts For Utilities - A Field Guide To Their Accomplishment And Maintenance, James Mabry Iddins, Charles F. Scholer

Indiana Local Technical Assistance Program (LTAP) Publications

A guide to developing specifications and procedures for road maintenance.

Irish H & V News

Building Services Engineering

No abstract provided.

Design Of Automotive Structural Components Using High Strength Sheet Steels - Structural Behavior Of Beam Webs Subjected To Web Crippling And A Combination Of Web Crippling And Bending, Chiravut Santaputra, Wei-Wen Yu

CCFSS Library (1939 - present)

INTRODUCTION In recent years, high strength steels have been used in automotive structural components to achieve weight reduction while complying with Federal safety standards. The current design recommendations, the "Guide for Preliminary Design of Sheet Steel Automotive Structural Components" 1 was issued by American Iron and Steel Institute (AISI) in February 1981. It was recommended for application to materials with yield strength up to 80 ksi. These design expressions are based primalily on the 1968 Edition of the AISI "Specification for the Design of Cold-Formed Steel Structural Members" 2 which was written for the design of buildings. The AISI Specification …

Manual Of Safety Practices, Rack Manufacturers Institute

Rack Manufacturers Institute (RMI) Specifications and Manuals (1984 - 2012)

No abstract provided.

Estimation Of Equivalent Axleloads: Computer Program Documentation, John M. Salsman, John A. Deacon

Kentucky Transportation Center Research Report

The estimation of equivalent axleloads (EAL) requires the correlation of several data bases. Described herein are three computer programs which summarize truckweight data and classification data, and combine the two data bases to estimate EAL's for each site where classification counts are available in a given year.

The programs also present the data in two matrices to characterize the effects that geographic area, federal-aid classification, coal-haul volume and total volume have on each of the traffic parameters necessary to compute EAL's.

Jackson Purchase Parkway Pavement Study, James H. Havens

Kentucky Transportation Center Research Report

Four distinct patterns of cracking were found. Temperature cracks are transverse and occur at intervals of about 15 to 88 feet. Roller-induced cracking has been made apparent by weather and erosion. Longitudinal cracking is usually at the edges of the wheel paths where rutting is prominent. Map cracking or checkering in the wheel paths is caused by the maximum shear stresses occurring at a depth equal to 1/3rd the radius of the loaded area (tire print). This cracking penetrated about 2.5 inches. This cracking and weakness was found only in the all-gravel asphaltic concrete. No stripping was found, but evidences …

Water-Induced Surface Failures On I 65, Hardin County, Kentucky, Ellis G. Williams, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

This report documents an investigation of water-related distress on portions of I 65 in Hardin County, Kentucky, on Muldraugh Hill. An open-graded surface placed on a full-depth asphaltic concrete pavement had shown areas of flushing and shallow shear failures in the outer lanes after one year of service. Cores were obtained from the outer lanes in areas exhibiting no problems to shear and flow failures. Core sites also were chosen across the lane to represent edge, wheel track, and between wheel track conditions. Visual inspection of the cores was made under normal lighting and an ultraviolet light and photographs were …

Microbial Characteristics Of An Activated Sludge And Three Commercial Preparations After Exposure To Phenolics, Laurie Gneiding

Theses

The biological characteristics of four microbial mixtures were examined after successive exposure to phenol and 2-chlorophenol at room temperature. One of the microbial mixtures was an activated sludge from the Livingston, NJ municipal wastewater treatment plant. The other three mixtures were commercial preparations sold by Polybac Corp.(Hydrobac), Sybron Corp. (BI-CHEM DC 1006/1007), and General Environmental Sciences(LLMO).

The characteristics examined were relative counts and species of gram negative/gram positive bacteria, yeast and fungi, protozoa, and higher organisms. For the gram negative bacteria and yeasts, culturing techniques and diagnostic tubes were used to determine the predominant species. Biochemical tests were done on …

Nondestructive Evaluation Of Rigid Pavements Using Road Rater Deflections [1984], Gary W. Sharpe, Mark Anderson, Robert C. Deen, Herbert F. Southgate

Kentucky Transportation Center Research Report

Road Rater deflections have been used to determine in-place structural conditions of rigid and composite pavements, based on modifications of principles and experience with the structural evaluation of flexible pavements. Details of the use of elastic layer theory to simulate deflection measurements associated with loadings for the Kentucky Road Rater are presented. Included is an illustration of the use of field deflection measurements to "back calculate'" in-place moduli. The procedures are generally iterative and involve matching measured deflections with theoretical deflections. Elastic layer principles have been used to simulate deflections only at the midslab position. Relationships regarding deflections at other …

1984 Safety Belt And Child Safety Seat Usage Rates In Kentucky And Evaluation Of A Public Information Campaign, Kenneth R. Agent, John M. Salsman

Kentucky Transportation Center Research Report

There were two objectives of the survey summarized in this report. One was to establish 1984 safety belt and child safety seat usage rates in Kentucky which were compared to 1983 and 1982 rates. The other was to evaluate the effectiveness of public information campaigns as a means of increasing safety belt and seat usage rates.

Statewide usage rates in the 19 cities previously surveyed in 1982 and 1983 showed that both driver safety belt and child safety seat and belt usage rates had increased in 1984. The 1984 statewide usage rate of safety belts by drivers was 6.9 percent …

A Statistical Comparison Of A Direct Filtration And A Conventional Water Treatment Facility In The Intermountain Region, Susan K. Burns, V. Dean Adams

Reports

Interest in low-cost direct filtration facilities and their effectiveness in treating the potable water sources of the Intermountain Region is increasing as the need for treated water supplies increase. Direct filtration is a water treatment scheme which does not include sedimentation and in some cases flocculation. Compared to conventional treatment, direct filtration has lowered capital costs, reduced space requirement, and decreased sludge quantities. Moreover, the direct filtration process may offer large reductions in coagulant dosages and costs.

Currently information comparing a direct filtration system to a conventional water treatment system in the Intermountain area is not readily available. The specific …

Impact Evaluation Of Traffic Alcohol Programs: Selected Locations In Kentucky, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

This report is an evaluation of increased police enforcement to reduce alcohol-related accidents at selected locations in Kentucky. Evaluations were performed for the following programs: 1) Lexington-Fayette County, including only Urban Police enforcement; 2) McCracken County, including Kentucky State Police, Sheriff's Office and Paducah Police enforcement; and 3) Warren County, including both Kentucky State Police and Bowling Green Police enforcement. Duration of enforcement and level of enforcement varied among the programs.

Four types of data were collected as a means of evaluating Traffic Alcohol Programs at the locations selected for study; accident data, arrest and adjudication data, cost-effectiveness data, and …

Measurement Of Air Force Fire Department Productivity: An Evaluation Of Efficiency/Effectiveness, Timothy A. Byers, Susanne M. Waylette

Theses and Dissertations

This research was sponsored to develop a method of evaluating the productivity of Air Force Fire Departments. Using the tasks developed by the Fire Department Workshop, input and output measures were defined and used in a new model of efficiency called Constrained Facet Analysis (CFA). The advantage of this methodology over others considered was that it can simultaneously evaluate multiple inputs and multiple outputs using empirical data with no a priori weighting. The results of the analysis provided an efficiency rating for each fire department and information about marginal rates of substitution and marginal rates of productivity for inefficient units …

Irish H & V News

Building Services Engineering

No abstract provided.

Low Technology Recycling And Rdf System At The U.S. Facility, Subic Bay, Philippines, Samuel A. Vigil, Donald E. Brunner

Civil and Environmental Engineering

The U.S. Facility Subic Bay is located about 50 miles east of Manila, on the East China Sea. The Facility consists of seven major Naval installations. The Facility is essentially a large commercial/industrial complex. The Public Works Center (PWC) Subic Bay is the public works agency responsible for the collection and disposal of the solid waste produced by the facility. A portion of the solid waste is manually sorted and recycled. Although the present manual sorting and recycling system is effective, PWC Subic Bay feels that it can be improved. Therefore , the Naval Civil Engineering Laboratory (NCEL) was requested …

Minor Maintenance Manual For County Bridges, Brent Roberts, Marion B. Scott, Charles F. Scholer

Indiana Local Technical Assistance Program (LTAP) Publications

This report outlines a routine program of bridge maintenance and does not cover the repair of bridges which requires a different set of resources. While the tasks described may seem simple and insignificant, they will extend to their fullest the lives of the bridges in the system.

Pavement Thickness Designs Utilizing Low-Strength (Pozzolanic) Base And Subbase Materials, Gary W. Sharpe, Robert C. Deen, Herbert F. Southgate, Mark Anderson

Kentucky Transportation Center Research Report

This paper presents information whereby laboratory test data for pozzolanic base and subbase materials may be combined with elastic layer theory and a limiting strain criterion to determine thickness designs equivalent to conventional asphaltic concrete and crushed stone pavement structures. A summary of laboratory testing in Kentucky also is presented. An example thickness design determination is presented and includes an economic comparison of alternative designs with the conventional asphaltic – crushed stone thickness design.

Relationship Between Kentucky Cbr And Slake Durability, Tommy C. Hopkins

Kentucky Transportation Center Research Report

The design of pavements requires a knowledge of the relative strength and durability of subgrade materials. In Kentucky, the CBR (California Bearing Ratio) test is used to define the relative bearing strength of subgrade materials. Pavement thickness can be obtained if traffic loadings and CBR values are known. Durability of subgrade materials can be characterized using the slake-durability test. The purposes of this study were to correlate values of (soaked) KYCBR and slake-durability indices and examine the swell potential of compacted shales. Correlations were developed between soaked KYCBRs and slake-durability indices obtained from three different slake-durability I testing procedures. The …

Analysis Of Loads And Settlements For Reinforced Concrete Culverts, David L. Allen, Bobby W. Meade

Kentucky Transportation Center Research Report

Three primary factors in considering the loads on, and therefore the design of, underground conduits are: bedding conditions, trench configuration, and use of the "imperfect trench." Models of varied conditions are analyzed using a finite element program and the results compared to data obtained at instrumented sites of similar conditions. Presented herein are charts developed from these analyses which will facilitate future design of culverts. Also presented are recommendations for design criteria and construction procedures.

Irish H & V News

Building Services Engineering

No abstract provided.

Evaluation Of Full-Depth Asphaltic Concrete Pavements, Herbert F. Southgate, Gary W. Sharpe, Mark Anderson, Robert C. Deen

Kentucky Transportation Center Research Report

This study was initiated to verify a newly-developed set of design curves for full-depth asphaltic concrete pavements. Quality control during construction was checked using nuclear density testers, Benkelman beams, and a Road Rater. During the course of this study, an analysis system was developed to interpret the dynamic deflections as measured by the Road Rater and was confirmed by elastic theory. The thickness design curves were verified within the accuracy of construction variations.

Rut depths measured in 1979 were analyzed in terms of potential rut depth resulting from consolidation under traffic due to lack of obtaining 100-percent of Marshall density …