Engineering Commons^™

Effect Of Testing Conditions In The Standard Astm C 1567 Test Procedure On Evaluation Of Asr Mitigation Potential Of Fly Ashes, Pavan Seemakurty

All Theses

Alkali Silica Reaction (ASR) is a widespread durability problem not only in the United States, but also in many countries across the world. ASR distress in concrete drastically reduces the service life of a structure and as such, there are no effective rehabilitation measures. As a result, the primary strategy to deal with ASR distress has been one of prevention/mitigation in new construction. Various mitigation measures are widely used to reduce the effects of ASR in concrete. Among these measures, the use of supplementary cementing materials (SCMs) is the most commonly employed method. SCMs are believed to mitigate expansions induced …

Real-Time Arterial Traffic Signal Performance Measures, Christopher M. Day, Edward J. Smaglik, Darcy M. Bullock, James R. Sturdevant

JTRP Technical Reports

Increasing demand for highway system capacity compels transportation agencies to extract as much capacity as possible from existing systems. Traffic signals represent a major component of highway systems. Improvement of traffic signal operation requires accurate performance measures. Despite recent improvements in computing technology, traffic signal controllers are currently not able to capture useful performance measures on a cycle-by-cycle basis. This report presents a set of performance measures that could be collected on a cycle-by-cycle basis by a traffic signal controller given the capability to log phase indications and detector actuations. The performance measures investigated here include the volume-to-capacity ratio and …

Assessment Of Potential Site Selection Methods For Use In Prioritizing Safety Improvements On Georgia Roadways, Priyanka Alluri

All Theses

With over 40,000 people continuing to die on US roads each year, the US government has heightened the awareness of critical safety issues with the passage of SAFETEA - LU legislation in 2005. The plan requires each of the states to develop a Strategic Highway Safety Plan (SHSP) and incorporate data-driven approaches to prioritize and evaluate program outcomes; else federal funds will be redirected. Seeking to meet the new demands for data-driven approaches, many states are struggling to identify data collection/maintenance requirements for satisfying new approaches to highway safety analysis. Recent research has shown that selecting projects on the basis …

Estimating In-Situ Flexural Strength Of Heat-Affected Prestressed Concrete Beams Using Constituent Material Models, Travis Collins

All Theses

When a prestressed concrete structure is subjected to a severe fire, significant damage is created to the extent that a visual analysis is sufficient in rendering the structure unusable. Although moderate fires also create structural damage, the effects can often not be visually assessed. Therefore, a need exists for a method that allows structures to be evaluated after a fire has occurred and visual observations present no conclusive evidence for making decisions regarding the structural impact of the fire on the structure.
It was assumed that temperature histories of a member arising from a moderate fire can be determined using …

Investigation Of The Discharge Coefficient For Circular Orifices In Riser Pipes, David Prohaska

All Theses

The purpose of this study is to examine the discharge coefficient as it pertains to
flow through a circular orifice cut into a thin-walled vertical riser pipe. Perforated riser
pipes are a popular outlet control structure for stormwater detention basins. These
basins are used to store and release stormwater runoff from impervious areas of
developed sites. Federal, state, and local regulatory agencies provide requirements for
the quality of stormwater runoff, as well as the maximum peak discharges from a
developed site. Accurately determining the flow rate from a perforated vertical riser
pipe is crucial to meeting these requirements and protecting …

Statewide Wireless Communications Project, Volume 1: Communication Field Tests For Satellite, Cellular, And Spread Spectrum Radio, J. V. Krogmeier, Darcy M. Bullock

JTRP Technical Reports

The Statewide Wireless Communications Project was an umbrella project intended to support various INDOT activities in the area of wireless communications. As these activities were conducted independently the report for the project is organized into three volumes. Volume 1 contains the results of satellite and cellular communications field testing undertaken in support of INDOT’s SiteManager application. Volume 1 also contains the results of an evaluation of spread spectrum radios for long-range communications. Volume 2 contains the results of detection zone evaluation for loop detection of bicycles and the results of testing algorithms for travel time estimation using vehicle re-identification based …

Bs News

Building Services Engineering

No abstract provided.

Statewide Wireless Communications Project, Volume 3: Data Collection And Signal Processing For Improvement Of Road Profiling And Proof Of Concept Of A Vehicle-Infrastructure Based Road Surface Monitoring Application, J. V. Krogmeier, Darcy M. Bullock

JTRP Technical Reports

The Statewide Wireless Communications Project was an umbrella project intended to support various INDOT activities in the area of wireless communications. As these activities were conducted independently the report for the project is organized into three volumes. Volume 1 contains the results of satellite and cellular communications field testing undertaken in support of INDOT’s SiteManager application. Volume 1 also contains the results of an evaluation of spread spectrum radios for long-range communications. Volume 2 contains the results of detection zone evaluation for loop detection of bicycles and the results of testing algorithms for travel time estimation using vehicle re-identification based …

Investigation Of The Effects Of Aggregate Properties And Gradation On Pervious Concrete Mixtures, Andrew Neptune

All Theses

Pervious concrete is a concrete mixture prepared from cement, aggregates, water, little or no fines and in some cases admixtures. It has been considered a Best Management Practice by the EPA because of its ability to reduce storm water runoff and to initiate the filtering of pollutants. Because the hydrologic properties of pervious concrete has been the primary reason for its reappearance in construction, the focus of previous research has been on maximizing the drainage properties of the mix with single-sized aggregates. This research, however, investigates the effects of aggregate properties and gradation on the strength, as well as hydrologic …

Predicting The Seismic Behavior Of The Dywidag Ductile Connector (Ddc) Precast Concrete System, Elizabeth Mary Kenyon

Master's Theses

Structural engineering is heavily dependent on the use of computers. When creating a building model using structural analysis software, it is required that the designer have an understanding of the system behavior and the modeling program capabilities.

Some engineers in the Southern California region are taking steps towards incorporating the Dywidag ductile connector (DDC) and super hybrid systems into building practice due to the advantages found in these systems’ construction methods and seismic performance.

As the DDC and super hybrid systems reach industry, the design engineer will need to model these systems using structural analysis programs. This report describes two …

Statewide Wireless Communications Project, Volume 2: Inductive Loop Detection Of Bicycles And Inductive Loop Signature Processing For Travel Time Estimation, J. V. Krogmeier, Darcy M. Bullock

JTRP Technical Reports

The Statewide Wireless Communications Project was an umbrella project intended to support various INDOT activities in the area of wireless communications. As these activities were conducted independently the report for the project is organized into three volumes. Volume 1 contains the results of satellite and cellular communications field testing undertaken in support of INDOT’s SiteManager application. Volume 1 also contains the results of an evaluation of spread spectrum radios for long-range communications. Volume 2 contains the results of detection zone evaluation for loop detection of bicycles and the results of testing algorithms for travel time estimation using vehicle re-identification based …

The Limnogeology Of The Lakes Sagara And Nyamagoma, Hudson Nkotagu

Tanzania Journal of Engineering and Technology (TJET)

The present study focuses on the limnogeological aspects of the lakes Sagara and Nyamagoma within the Malagarasi Wetland Ecosystem. Abiotic parameters from water and sediment samples were determined during the dry and wet seasons using appropriate gears and methods. The data show variation of the abiotic parameters in both lakes from the water surface to the bottom. Lake Nyamagoma is less turbid (0.7-24 NTU) than Lake Sagara (25 to 65 NTU). The water transparency was also high at Lake Nyamagoma (0.75-1.5 m) thus supporting the observed turbidity trend. The physical chemical changes may be attributed to processes such as cooling, …

Application Of Non-Destructive Testing In Evaluating Reinforced Concrete Structural Elements In Buildings, I Rubaratuka

Tanzania Journal of Engineering and Technology (TJET)

Of recent a large number of existing reinforced concrete buildings have required reconstruction, renovation and improvement. This tendency poses a number of problems that have to be solved, the main one being to determine the actual strength condition of the structural components/elements of the building. It includes determination of the quality of materials used, specification of the types and description of apparent faults and damages and extent of wear of the building. To undertake this evaluation, non – destructive testing methods are used. In this paper, applications of non – destructive testing methods to determine the strength state of reinforced …

Assessment Of Integrated Water Resources Management Practice In Yatta Canal, Machakos District, Kenya, Lawrence Simitu

Tanzania Journal of Engineering and Technology (TJET)

Yatta Canal is situated in Yatta division, Machakos district about 100 km from Nairobi along Thika- Garissa road. It is about 60 Km long and supplies water for domestic, livestock and irrigation use. Over the years, the water supply has been unreliable especially during dry season leading to conflicts between upstream and downstream consumers. Sometimes the Government has been forced to intervene to restore order. The study aimed at assessing the use of Yatta canal, based on the principles of Integrated Water Resources Management (IWRM) which stipulates efficient use of water and involvement of all stakeholders in decision making for …

Sediment Yield Prediction In Tanzania: Case Study Of Dodoma District Catchments, Mathew Mulemgera

Tanzania Journal of Engineering and Technology (TJET)

Soil erosion and sedimentation is serious and is resulting in rapid sedimentation of streams and reservoirs in Tanzania. This makes sediment yield modeling important before undertaking water resources development projects, although it has so far not been done in the country. At present sediment yield prediction can be done using physically based models, empirical soil erosion and sediment yield models, and sediment rating curves. The physically based models contain numerous parameters that are difficult to measure or estimate, making them inappropriate in developing countries like Tanzania. The rating curves give rough estimates while the empirical sediment yield models need runoff …

Quality Control In The Construction Of Reinforced Concrete Buildings In Dar Es Salaam, I Rubaratuka

Tanzania Journal of Engineering and Technology (TJET)

Quality Control in the construction industry is very important to ensure that what is being done conforms to the applicable standards or good practice and the contract documents. In this article, results of investigations conducted at different construction sites for reinforced concrete buildings in Dar es Salaam to check if quality control measures are being implemented are discussed. It has been established that generally quality control is not properly carried out. Finally, measures to enhance quality control on sites are outlined.

Sedimentation Status Of Lake Victoria: Loading From River Mouth And In-Lake Sedimentation, F Mwanuzi1

Tanzania Journal of Engineering and Technology (TJET)

Lake sediments consist of the input of suspended solids by river discharges, the autochthonous produced particulate matter in the water column and the settled material on the lake bottom. The loading, transport, formation and decay of the sediments entering the Lake Victoria from Tanzanian side was monitored for the period 2000 to 2005. The sedimentation study focused on; quantification of settling fluxes of particulate nutrients and organic carbon at the off shore(Pelagic) and near-shore(Littoral) monitoring stations. Monitored data on sedimentation rate and settling velocities has been sampled and analysed in the period November 2000 to March 2005. The mean sedimentation …

Strategies For Promoting The Use Of Concrete Pavements In Tanzania: Technical And Institutional Considerations, Mfinanga A

Tanzania Journal of Engineering and Technology (TJET)

High-type roads in Tanzania have been predominantly of asphaltic concrete construction. This ever enlarging and ageing asphaltic road network represents increasing resource requirements on the road agency in the form of maintenance. Limited resources coupled with the ever sky-rocketing costs of petroleum products and the competing demands of social economic developments, presupposes the need to look for alternative road construction technology that is more cost-effective and resource optimising. Experience gained from developed and some developing countries where concrete pavements have been widely used suggests the potential of this type of pavement in many developing countries. This paper discusses the technical …

Trends Of Rainfall And Maize Productivity In Malawi, T Kimaro

Tanzania Journal of Engineering and Technology (TJET)

Daily rainfall data between 1966 and 2005 across all Agricultural Development Areas (ADDs) in Malawi was investigated to determine changes in selected rainfall characteristics and their impact on Maize productivity. Rainfall indices analyzed included rainfall amounts (annual and seasonal), onset, cessation, dry spells and length of rainy season. Man Kendal’s trend test was applied to the time series of these indices to detect any trends in the time series. Water Requirement Satisfaction Index (WRSI) for maize crop was used to study the spatial-temporal variation of maize productivity and thus its linkage to rainfall. Definition of onset and cessation adopted from …

A Comparative Study Of Seismic Response Of R.C Low-To-Medium Rise Buildings Under The Egyptian Code Of Loads (Ecdl 2003), Mohamed Ahmed Mohamed Diab

Archived Theses and Dissertations

No abstract provided.

Bs News

Building Services Engineering

No abstract provided.

A Laboratory Study On The Effects Of Submerged Vertical And Semicircular Breakwaters On Near-Field Hydrodynamics And Morphodynamics, David Young

All Theses

A laboratory study is presented herein that investigates the effects of submerged vertical and semicircular breakwaters on near-field hydrodynamics and morphodynamics. Breakwaters are employed worldwide in order to reduce destructive wave forces often imparted on vulnerable shorelines; a task partially completed by reflecting incident wave energy back out to sea. However, two common side-effects of their function are the occurrence of scour at the breakwater, which can lead to structural problems; and offshore ripple formations, which are influential in scour protection failure and sediment transport patterns. This study aims to determine a relationship between breakwaters and the wave reflection coefficient …

Chemisorption Of Oxygen Onto Activated Carbon Can Enhance The Stability Of Biological Perchlorate Reduction In Fixed Bed Biofilm Reactors, Young Chul Choi, Xu Li, Lutgarde Raskin, Eberhard Morgenroth

Department of Civil and Environmental Engineering: Faculty Publications

Fixed bed biofilm reactors with granular activated carbon (GAC) or glass beads as support media were used to evaluate the influence of short-term (12 h) and long-term (23 days) increases of influent dissolved oxygen (DO) concentrations on biological perchlorate removal. The goal was to evaluate the extent by which chemisorption of oxygen to GAC can enhance the stability of biological perchlorate reduction. Baseline influent concentrations were 50 μg/L of perchlorate, 2 mg/L of acetate as C, and 1 mg/L of DO. Perchlorate removal in the glass bead reactor seized immediately after increasing influent DO concentrations from 1 to 4 mg/L …

Geotechnical Investigations At Three Sites In The South Carolina Coastal Plain That Did Not Liquefy During The 1886 Charleston Earthquake, Ronald Boller

All Theses

Geotechnical investigations were performed at three sites in the South Carolina Coastal Plain where liquefaction is believed to not have occurred in 1886 or during other Holocene earthquakes. The three sites are the Coastal Research and Education Center (CREC) located near Charleston, and the Borrow Pit and Marsh Road sites at Hobcaw Barony near Georgetown. The investigations consisted of nine seismic cone penetration test (SCPT) soundings, three non-seismic cone penetration test (CPT) soundings, one standard penetration test (SPT) boring, and two dilatometer test (DMT) soundings. Shear wave velocities (Vs) were calculated from the SCPTs using pseudo interval measurements at the …

A Relational Model For Environmental And Water Resources Data, Jeffery S. Horsburgh, David G. Tarboton, David R. Maidment, Ilya Zaslavsky

Civil and Environmental Engineering Faculty Publications

Environmental observations are fundamental to hydrology and water resources, and the way these data are organized and manipulated either enables or inhibits the analyses that can be performed. The Observations Data Model presented here provides a new and consistent format for the storage and retrieval of point environmental observations in a relational database designed to facilitate integrated analysis of large data sets collected by multiple investigators. Within this data model, observations are stored with sufficient ancillary information (metadata) about the observations to allow them to be unambiguously interpreted and to provide traceable heritage from raw measurements to useable information. The …

Factors Affecting The Performance Of Brick Veneer Construction, Jocelyn Dickie

All Theses

The first topic focused on in this report is the height restriction imposed by the masonry standard for brick veneer on wood frame backing. The current US standard (ACI 530-05/ASCE 5-05/TMS 402-05 Building Code Requirements for Masonry Structures) does not allow brick veneer to extend more than thirty feet above the foundation when supported by wood framing. These prescriptive requirements are compared with those of the Canadian (CSA 304.1-04) and Australian (AS 3700-2001) masonry standards. The logic found for this height restriction is based on the vertical differential movement caused by moisture and thermal expansion of the brick veneer and …

Analysis Of The Impact Of Fuel Price And Bidding Volume On The Engineer's Estimate, Greaton Sellers

All Theses

The research project 'Analysis of the Impact of Fuel Price and Bidding Volume on the Engineer's Estimate' was initiated by the South Carolina Department of Transportation and conducted by Clemson University. This research was executed as a two part study, 'Best Practices for Developing the Engineer's Estimate', which addressed two distinct but related objectives. The first research objective was to fully explore the advantages and disadvantage of alternative methodologies utilized to compile the engineer's cost estimate. This research objective is addressed in Report Volume I. The second research objective, which is addressed in this Report Volume II, was to develop …

Knowledge-Based System To Support Site Investigation For Safety Improvement, Andrew P. Tarko, Andrew Kwasniak, Jorge Ramos

JTRP Technical Reports

Specialists in transportation and other areas of engineering are trying to improve road safety. The most difficult part is determining the road features, driver behaviors, and vehicular failures that unduly increase the risk of crash. To help INDOT safety investigation teams, a previous research project developed a prototype Road Safety Investigation Tool (RSIT) for two-way stop-controlled intersections. The research summarized here has evaluated the prototype RSIT and has developed a new version RSIT2 that has incorporated the findings of the evaluation.

The evaluation of the RSIT prototype confirmed usefulness of the proposed methodology. The tool has been applied to two …

A Laboratory Study Of Streambed Stability In Bottomless Culverts, Brian Mark Crookston

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Traditional culvert designs, in many cases, have become habitat barriers to aquatic animal species. In response, environmentally sensitive culvert designs have been developed to function as ecological bridges. Bottomless and buried invert culverts are examples of such designs and are commonly used for fish passage. Additional design guidance specific to streambed stability in buried-invert or bottomless culverts under high flow events is needed. This study investigated incipient motion conditions for four substrate materials in a 2-ft (0.61-m) diameter circular bottomless arch culvert and in a 1-ft (0.30-m) wide rectangular flume in a laboratory setting. General scour of the streambed within …

A Collection Of New Studies Using Existing And Proposed Techniques And Instrumentation For Nondestructive Testing And Analysis Of Concrete Materials And Structures, Shane D. Boone

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A variety of studies were performed using existing and newly proposed techniques and instrumentation to further the understanding of nondestructive testing of concrete. A new combined stress wave propagation method was developed that combined the existing methods of the spectral analysis of surface waves, impact echo, and free-free resonant column experimental and analysis techniques. The method was used to determine the stiffness profile and location of embedded voids in a concrete tunnel lining modeled as a three layer concrete slab. A new equation was proposed that predicted the level of damage of concrete samples based on the functions of the …