Engineering Commons^™

Behavior Of Square And L-Shaped Slender Reinforced Concrete Columns Under Combined Biaxial Bending And Axial Compression, Wen Hu Tsao

Dissertations

A numerical analysis was developed to evaluate the complete load-deflection and moment-curvature relationships for square and L-shaped slender reinforced concrete columns subjected to biaxial bending and axial load. This computer model can be used for any cross section geometry and material properties of normal concrete. The analysis was based on a deformation control and both the ascending and descending branches of curves can be studied. The finite difference method was introduced to calculate the deflections which satisfy the compatibility equations. Six square slender columns and eight L-shaped slender columns were tested to compare their experimental load-deformation results with the analytical …

Frictional Resistance Of Geotextiles, Md. Khairul Alam

Theses

The pullout resistance of geotextiles was examined using pullout tests. A suitable wooden box with large (2 ft x 2 ft x 4 ft) dimensions was used to avoid the effect of boundary and to simulate field conditions. Two types of failure patterns were observed. For shallow embedment (<3 ft), geotextile produced a movement of the surrounding mass of sand in the shape of an inverted cone due to interlocking friction between geotextile and sand particles. The cone angle decreases with increase in depth of embedment. For embedment equal to or greater than 3 ft., no sand cone developed and the failure occurred along the interface of geotextile and sand. For 1 ft. surcharge, the increase in the pullout resistance due to combined horizontal and vertical embedment was about 30 %.

Influence Of Heavy Metal Concentration On Rotating Biological Contrator Performance, Huei-Sheng Cheng

Theses

Seven heavy metals ( Fe⁺², Mn⁺², Zn⁺², Ag⁺, Pb⁺², Cu⁺², Cd⁺² ) at various concentrations were investigated in a Rotating Biological Contactor (RBC) system. The experimental data indicated that the degree of heavy metal toxicity in the biological system mainly depended on the ratio of inflow heavy metal concentration to organic loading. The optimal ratio of heavy metal to organic loading was determined on the basis of the maximum removal of chemical oxygen demand (COD) under different operating conditions. In addition, the effect of heavy metal on …

Evaluation Of Torsional Provisions In Seismic Codes, Anil K. Chopra, Rakesh K. Goel

Civil and Environmental Engineering

The effects of plan asymmetry on the earthquake response of code-designed, one-story systems are identified with the objective of evaluating how well these effects are represented by torsional provisions in building codes. The earthquake-induced deformations and ductility demands on resisting elements of asymmetric-plan systems, designed according to several different codes, are compared with their values if the system plan were symmetric. The presented results demonstrate that the design eccentricity in building codes should be modified in order to achieve the desirable goal of similar ductility demands on asymmetric-plan and symmetric-plan systems. The design eccentricity should be defined differently for elastic …

Illustrative Examples Based On The Asce Standard Specification For The Design Of Cold-Formed Stainless Steel Structural Members, Shin-Hua Lin, Wei-Wen Yu, Theodore V. Galambos

CCFSS Library (1939 - present)

PREFACE During the past four years, two methods were developed for the design of stainless steel structural members at the University of Missouri-Rolla with consultation of Professor T. V. Galambos at the University of Minnesota. One of the methods is based on the load and resistance factor design (LRFD) and the other is based on the allowable stress design (ASD). Both design methods are now included in the new ASCE Standard 8-90, Specification for the Design of Cold-Formed Stainless Steel Structural Members. At the September 21, 1990 meeting of the Control Group of the ASCE Stainless Steel Cold-Formed Section Standards …

Part 1 Of The Mcmaster University Laboratory Test Program On Brick Veneer/Steel Stud Wall Systems, Robert G. Drysdale, Normand Breton

CCFSS Library (1939 - present)

The behaviour of steel stud backup wall panels subjected to lateral loads was investigated experimentally and analytically. In addition, various steel stud to track connections were investigated experimentally.

The experimental work consisted of the fabrication and testing of 109 steel stud to track connections. Thirty-two full size steel stud backup wall panels were also tested. Some of the panels were braced with various types of commonly used steel bridging while others were braced with gypsum board sheathing or Styrofoam SM insulation. Twelve beam tests were also performed in order to establish the flexural bending capacity of the steel studs tested. …

Seat Belt Attitudinal Survey, Kenneth R. Agent

Kentucky Transportation Center Research Report

The primary objective of this study was to conduct a statewide survey to determine public opinion of a statewide mandatory safety belt law. The survey was conducted so that opinions could be analyzed by areas of the state. The method used to separate the state into geographic regions was to use the boundaries of the 15 Area Development Districts (ADD). A mail survey was conducted with 1,000 questionnaires sent to each ADD. A response rate of 51 percent was obtained.

The respondents were in favor of a statewide law requiring use of safety belts. The statewide percentage in favor of …

Construction Evaluation Of Hydraway Edge Drains And Outlet Pipes On Interstate 64, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

This report documents the installation of the Hydraway edge drain (version two) on 1-64 in Franklin·Woodford-Scott and Fayette Counties. The edge drain was placed on the back side of the trench against the shoulder and backfilled with a sand/slurry.

From observations on this project and several previous projects, the sand/slurry backfill helps to insure the integrity of the drainage system during initial backfilling. It is apparent that the sand slurry backfill provides a better installation in comparison to previous methods using excavated trench material. Notable trench settlement did occur on this project. It is apparent that insufficient water was used …

Stochastic Hydrologic Modeling In Real Time Using A Deterministic Model (Streamflow Synthesis And Reservoir Regulation Model), Time Series Model, And Kalman Filter, Philip Kwok Fan Tang

Dissertations and Theses

The basic concepts of hydrologic forecasting using the Streamflow Synthesis And Reservoir Regulation Model of the U.S. Army Corps of Engineers, auto-regressive-moving-average time series models (including Greens' functions, inverse functions, auto covariance Functions, and model estimation algorithm), and the Kalman filter (including state space modeling, system uncertainty, and filter algorithm), were explored. A computational experiment was conducted in which the Kalman filter was applied to update Mehama local basin model (Mehama is a 227 sq. miles watershed located on the North Santiam River near Salem, Oregon.), a typical SSARR basin model, to streamflow measurements as they became available in simulated …

Population Trends For Indiana Counties, Cities, And Towns 1970–1990, Herpicc

Indiana Local Technical Assistance Program (LTAP) Publications

This report presents tabulation and rankings that permit a direct comparison of population growth and population totals for city, town, and county units to assist officials in making amore comprehensive interpretation of the 1990 census figures.

Uniform System For Accident Reporting, Jorge A. Vanegas

Indiana Local Technical Assistance Program (LTAP) Publications

This report presents the results of Project 91-08 Task 5, Project 1, Part III: Uniform System for Accident Reporting.

Bs News

Building Services Engineering

No abstract provided.

Green's Law Revisited: Tidal Long-Wave Propagation In Channels With Strong Topography, David A. Jay

Civil and Environmental Engineering Faculty Publications and Presentations

Green's Law states that tidal long-wave elevation ζ and tidal transport Q vary with width b and depth h according to ζ ≌ b^−1/2h^−1/4 and Q ≌ b^+1/2h^+/4. This solution is of limited utility because it is restricted to inviscid, infinitesimal waves in channels with no mean flow and weak topography (those with topographic scale L ≫ wavelength λ). An analytical perturbation model including finite-amplitude effects, river flow, and tidal flats has been used to show that (1) wave behavior to lowest order is a function of only two nondimensional parameters representing, respectively, …

Field Performance Report On Corrugated Polyethylene Pipe, L. John Fleckenstein, David L. Allen

Kentucky Transportation Center Research Report

This report documents the installation and performance of corrugated smooth lined polyethylene pipe installed during construction of South Forbes Road in Fayette County, KY 54 in Daviess County, US 62 in McCracken County, Nicholasville Road in Fayette County, US 68/KY 80 in Warren County, KY 127 in Franklin County, US 62 in Hardin County, Donaldson Road and KY 236 in Kenton County, KY 17 in Kenton County, and Anderson Road in Kenton County. The majority of the pipe installed was N-12 pipe manufactured by Advanced Drainage Systems, Inc., and is designated as ADS N-12. ADS N-12 is a corrugated high-density …

Sensitivity Study Of 1986 Aashto Guide For Design Of Pavement Structures, Herbert F. Southgate

Kentucky Transportation Center Research Report

A sensitivity study of 14 items added to the 1986 AASHTO Guide for Design of Pavement Structures indicated: (1) variations in percent reliability were most influential on the design EAL for the same pavement structure while (2) variations in standard deviations had minimal effects. (3) Resilient moduli for base and subbase materials are very dependent upon stress state (or bulk stress). (4) A method was developed to quantify the effect of drainage capabilities for various soils and its effect upon reduction in structural coefficients for base and subbase materials. (5) Literature review revealed 13 relationships to define soil stiffness. The …

Disc Size Scale-Up In Rotating Biological Contactor System, Chi-Sheng Chang

Theses

Disc size scale-up of prototype and small-scale RBC plants are successfully developed by applying the 114 data sets obtained from 12 RBC plants to the evaluation of percent sBOD remaining. These data analyses are performed by the least square method, therefore, the scale-up factors of the prototype and the small-scale are determined at different hydraulic loading. Furthermore, the relationship between scale-up factor and the disc diameter are established under the given flow rate, the number of stages, and the number of discs. A group of Curves are obtained and can be utilized for the full-scale RBC plant preliminary design. The …

Ole Miss Engineer 1991

Ole Miss Engineer

No abstract provided.

Flexural Behavior Of Web Elements With Openings, Roger A. Laboube, Wei-Wen Yu, Ming-Yang Shan, K. D. Batson

CCFSS Library (1939 - present)

INTRODUCTION The purpose of this research project has been to investigate the flexural behavior of C-shaped members with web openings. Three common industry standard C-sections have been studied as summarized in the First and Second Progress Reports. To date two testing sequences have been completed. Test sequence No.1 investigated sections with web openings fabricated from nominally low yield strength material. Test sequence No.2 examined sections both with and without web openings. Specimens in test sequence No. 2 have nominally higher yield strengths. This report summarizes the test procedure and results of the research to date.

Bs News

Building Services Engineering

No abstract provided.

Evaluation Of Pe Film, James E. Funk, Theodore Hopwood Ii, Christopher M. Oberst

Kentucky Transportation Center Research Report

Laboratory tests were conducted to assess the ability of a 3-mil thick adhesive-backed polyethylene film (Polymask) to protect vehicle paint finishes from acid-rain damage. The laboratory tests employed conditions known to be relevant to actual service conditions including: 1) automotive paints of various colors, 2) simulated acid-rain solutions (of pH values from 2.2 to 5.5), and 3) service temperatures (120 to 160 °F). Laboratory tests included cyclic evaporation and soak tests similar to those employed in a previous series of tests for Toyota (1). Cyclic evaporation tests were performed for 12 cycles and the soak tests were performed for 5 …

Value Of Research, Kentucky Transportation Center

Kentucky Transportation Center Research Report

Transportation research in Kentucky has been ongoing since 1914. The Road Materials Testing Laboratory was established that year at the University of Kentucky. Operation of the laboratory commenced in 1915 under the guidance of Professor D.V. Terrell who later became Dean of the College of Engineering. Dean Terrell often noted that the purpose of research was not to save money but to make it go farther. Public funding was never sufficient to accomplish all that various agency personnel considered essential nor that which the public deemed necessary and research was conducted most often for the purpose of gaining more for …

Appendix: List Of Participants [1991], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.

Wrap-Up Luncheon, Milo D. Bryant

Kentucky's Annual Forum on Transportation

No abstract provided.

Surface Transportation Assistance Act 1991 Report, T. Peter Ruane

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky's Legislative Perspective, Michael R. Moloney

Kentucky's Annual Forum on Transportation

No abstract provided.

Construction Engineering And Management Option At The University Of Kentucky, James D. Stevens

Kentucky's Annual Forum on Transportation

No abstract provided.

Advanced Institute For Transportation Systems Management, Tomas R. Leinbach

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky Transportation Cabinet Scholarship Program: Initial Years At The University Of Kentucky, Jerry G. Rose

Kentucky's Annual Forum on Transportation

No abstract provided.

University Transportation Centers: Partners For The '90s, Charley V. Wootan

Kentucky's Annual Forum on Transportation

No abstract provided.

Strategic Highway Research Program Products, John O. Hibbs

Kentucky's Annual Forum on Transportation

No abstract provided.