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Dissertations / Theses on the topic 'Civil Engineering (Theses)'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Stone, Gregory M. "Beneficial Reuse of Corrugated Paperboard in Civil Engineering Applications." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/691.

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Abstract Beneficial Reuse of Corrugated Paperboard in Civil Engineering Applications Gregory Michael Stone An investigation was conducted to explore the potential for reuse of corrugated paperboard. Corrugated paperboard represents a large fraction of the municipal solid waste generated and discarded in the United States. Alternative applications for reuse can provide a significant benefit by reducing the volume of waste being disposed and by reducing the use of raw materials. Four civil engineering applications were examined for potential beneficial reuse of corrugated paperboard: slurry tr

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2

Deacon, M. "Distributed Collaboration: Engineering Practice Requirements." Thesis, Linkt to the online version, 2007. http://hdl.handle.net/10019/755.

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Park, Suwan. "A systems approach to strategic planning for the Civil Engineering Department." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08222008-063414/.

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4

Cronje, Mercia. "Engineering process model: Detection of cycles and determination of paths." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2376.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2006.<br>In order to plan the engineering work of large construction projects efficiently, a model of the engineering process is required. An engineering process can be modelled by sets of persons, tasks, datasets and tools, as well as the relationships between the elements of these sets. Tasks are more often than not dependent on other tasks in the engineering process. In large projects these dependencies are not easily recognised, and if tasks are not executed in the correct sequence, costly delays may occur. The homogeneo

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Day, Peter William. "A contribution to the advancement of geotechnical engineering in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79868.

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Thesis (DEng)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Geotechnical engineering is a relatively young field of engineering and one in which there are still many unanswered questions and gaps in our knowledge. Added to this, the geotechnical materials on each new site on which geotechnical work is undertaken are the unique product of many influences including geology, geomorphology, climate, topography, vegetation and man. There is thus plenty of scope for innovation. This dissertation describes the contributions made to Geotechnical Engineering in South Africa by the Candidat

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Welling, Gary E. "Engineering Performance of Polymer Amended Soils." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/856.

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A laboratory test program was undertaken to evaluate a series of engineering properties over a range of soil types; amendment types and addition rates; and moisture contents to enhance understanding of the engineering significance of polymer amendment. Four soils were manufactured and tested with varying ranges of fines and plasticity. A proprietary elastic copolymer was tested at addition rates of 0.5% to 2.5% (dry weight basis). Cement was tested at addition rates of 1% to 4%. Lime was tested at an 8% addition rate. Water addition rates ranged from 4% dry of optimum to 4% wet of optimum. Eng

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7

Dithinde, Mahongo. "Characterisation of model uncertainty for reliability-based design of pile foundations." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/21612.

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Dissertation (PhD)--University of Stellenbosch, 2007.<br>ENGLISH ABSTRACT: To keep pace with international trends, the introduction of geotechnical limit state design in South Africa is inevitable. To pave the way for implementation of limit state pile design in the country, the study quantifies model uncertainty in the classic static pile design formula under the Southern African geologic environment. The generated model uncertainty statistics are used to calibrate partial resistance factors in a reliability-based design framework. A series of pile performance predictions by the static

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Murray, Alexander J. "Modeling Artificial Groundwater Recharge in the Santa Rosa Creek Watershed." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2140.

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The Santa Rosa Creek Watershed is an approximately 48 mi2 large watershed located on the central coast of California. This watershed drains to the Pacific Ocean through Santa Rosa Creek as it passes through agricultural land and the town of Cambria. Historically the groundwater within the Santa Rosa Creek Watershed has been used for irrigation, municipal and domestic uses, and the creek is critical habitat steelhead trout. During dry years, there is less water for all uses. When low groundwater levels occur, water can be drawn out of the creek and into the soil, drying out steelhead habitat. S

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9

Burroughs, Gary Leslie. "The response to environmental economic drivers by civil engineering contractors in South Australia." Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09ENV/09envb972.pdf.

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Bibliography: leaves 91-93. Examines the response of two civil engineering construction contractors in South Australia to environmental economic conditions and market requirements using primarily an action research methodology whilst the researcher was engaged as the environmental manager at both corporations.

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Mitchell, Ryan. "A WANFIS Model for Use in System Identification and Structural Control of Civil Engineering Structures." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/1165.

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With the increased deterioration of infrastructure in this country, it has become important to find ways to maintain the strength and integrity of a structure over its design life. Being able to control the amount a structure displaces or vibrates during a seismic event, as well as being able to model this nonlinear behavior, provides a new challenge for structural engineers. This research proposes a wavelet-based adaptive neuro- fuzzy inference system for use in system identification and structural control of civil engineering structures. This algorithm combines aspects of fuzzy logic theory,

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Strasheim, Jacobus Alexander van Breda. "A relation-based approach to Engineering Management Systems." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1328.

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Thesis (PhD (Civil Engineering))--University of Stellenbosch, 2007.<br>The primary goal of this thesis is to indicate how systems theory and engineering process modelling can be applied to provide models for consulting engineering service business enterprises. The typical management systems used for these businesses are investigated to determine the application of systems and process models. The motivation for this study is based on the fact that integrated management systems for consulting engineering practices are presently based on selective business analysis and process modelling that

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Abutin, Megan P. "Effects of Using Clay Nanoparticles as a Soil Amendment to Remove Nitrate from Stormwater." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1908.

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Development of urban areas continues to increase, disrupting the natural ecosystem and the pathways for water to drain into downstream water bodies. As the amount of impervious area increases, pollutants can accumulate on the surface and enter the water cycle by stormwater. In most cities, the stormwater flows into a storm drain that is discharged into a water body. Low Impact Development technology has been developed to treat stormwater prior to discharge downstream. A bioretention cell is used to treat stormwater pollutants such as nitrate, phosphorus, total suspended solids, and metals. Pas

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Thompson, Geoffrey. "Best practice of crane support structures design : an expert survey." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1904.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2007.<br>Research on cranes and crane support structures has been completed at Stellenbosch University’s Structural Division. In order to link the research already completed with that which is practically relevant, an industry related expert survey was proposed. Consequently, the research title is “Best Practice of Crane Support Structures Design – An Expert Survey”. The primary objective of the study is to complete research, which can be used at a later stage to compile a “best practice” guideline for support structures des

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Bulman, Andrew. "Longbeach Mall : traffic impact assessment." Thesis, Stellenbosch : University of Stellenbosch, 2001. http://hdl.handle.net/10019.1/3427.

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Thesis (MEng (Civil Engineering))--University of Stellenbosch, 2001.<br>This Traffic Impact Assessment (TIA) was commissioned in March 1998 as a supporting document to an application for the rezoning of an ert in Noordhoek from general housing to commercial use. The proposal at the time was to develop a medium·sized 15 000 m2 GLA shopping centre with supporting offices and a Health & Racquet Club. All the work (including managing the traffic counting team) was carried out by myself under the guidance of Dr Piet Jordaan at Gibb Africa Consulting Engineers. As financial backing and anchor t

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Sinske, A. N. (Alexander Nicholas). "Comparative evaluation of the model-centred and the application-centred design approach in civil engineering software." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52741.

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Thesis (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: In this dissertation the traditional model-centred (MC)design approach for the development of software in the civil engineering field is compared to a newly developed application-centred (AC)design approach. In the MC design software models play the central role. A software model maps part of the world, for example its visualization or analysis onto the memory space of the computer. Characteristic of the MC design is that the identifiers of objects are unique and persistent only within the name scope of a model, and t

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Carmona, David Isaac. "Quantifying the Life Cycle Benefits of Performance-Based Design in Sustainable Design." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/708.

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ABSTRACT Quantifying the Life Cycle Benefits of Performance-Based Design in Sustainable Design David Carmona For this thesis, a method is developed and tested for use with performance based design to quantify the sustainable and financial benefits of designing buildings to a structural performance level higher than Life-Safety. This paper starts to answer the question, “which would be a better investment: build structures to a performance level of Immediate Occupancy (IO) with the likelihood of less damage and downtime after an earthquake or continue to build to the building code’s implied min

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Swain, Allyson. "Modeling the Groundwater Basin in the Northern Cities Management Area." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2330.

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A model was developed to simulate the groundwater of 8,300 acres of the Northern Cities Management Area (NCMA), which encompasses the northern portion of the Arroyo Grande Watershed and a small subset of the Santa Maria Valley Groundwater Basin. This watershed and groundwater basin is located on the coast and contains Oceano and the Cities of Arroyo Grande, Grover Beach, Pismo Beach. Groundwater in the NCMA is used heavily for agricultural irrigation in the southern portion and municipal applications in the northern portion. Up to 18 of these municipal wells and over 50 irrigation wells are dr

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Chirwa, M. P. W. "An evaluation of the minimum requirements for the design of rural water supply projects." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2895.

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Thesis (MScEng (Civil engineering))--University of Stellenbosch, 2005.<br>In this study, the minimum standards required for the design of rural piped water supply projects as set by the Department of Water Affairs and Forestry (DWAF) are evaluated with respect to capital pipe cost using the Nooightgedacht rural water supply scheme selected as a case study.

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Barnard, M. M. "Discharge measurement at natural controls in Western Cape rivers." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53395.

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Thesis (MEng)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: This study sets out to explore the possibilities and accuracy of flow measurement at natural controls, focussing specifically on Western Cape cobble-bed rivers. These rivers are regarded as being difficult in terms of flow measurement, mostly due to their large scale roughness and very turbulent and uneven flows. The aim is to determine a system through which various types of natural controls can be calibrated, by establishing a relationship between the discharge coefficient and the physical characteristics of each co

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De, Lange Johan Hendrik. "An experimental investigation into the behaviour of a 5 ton electric overhead travelling crane and its supporting structure." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/414.

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Alberti, L. I. "Flow around cylindrical towers : the stabalising role of vertical ribs." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2426.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2006.<br>The aim of this thesis is to study the stabilising effect which vertical ribs may have on a tall cylindrical structure, with the focus on the proposed Solar Chimney. The report begins with a brief introduction to the Solar Chimney concept. A study is made of flow regimes which exist for flow around a circular cylinder and these flow regimes, together with their characteristics, are described. Various threats to the Solar Chimney are identified and will be investigated. The natural shape and strength of the Saguaro C

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De, Villiers J. W. L. "2D Modelling of turbulant transport of cohesive sediments in shallow reservoirs." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/2940.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2006.<br>Modelling of the transport of fine cohesive sediments, as found in most South African reservoirs, has not been well developed. This is because the transport processes that are involved are complex and the theories not as implicit as the traditional equilibrium transport theories for coarse non-cohesive sediment. Advection and dispersion are found to be the processes that best describe the transport of fine sediments in turbulent flow conditions. A two-dimensional modelling tool, MIKE 21C, which simulates reservoir

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Brand, W. W. (Willem Wouter). "Reliability assessment of a prestressed concrete member." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52430.

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Thesis (MScEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: First-order second-moment structural reliability methods are used to assess the reliability of a prestressed concrete beam. This beam was designed for imposed office floor loads and partitions following the limit states design method as provided for by the applicable South African structural codes, viz SABS 0100-1:1992 and SABS 0160:1989. The reliability is examined at two limit states. At the ultimate limit state of flexure the ultimate moment of resistance must exceed the applied external moment at the critical sec

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Vosloo, Robert Nicolaas. "The role of civil engineering professionals within the housing environment in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20146.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The development of mass housing is an excellent example of multi-disciplinary projects. Several housing projects have been unsuccessful due to a misunderstanding of the necessary collaboration and buy-in that are required from all parties concerned. The focus of this study is to identify the required skill sets and responsibilities of the Housing Project Manager in the Housing environment, and in turn, will support the development of the foundation of the civil engineering postgraduate curricula. Civil engineers are edu

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Chan, Ada Mingwah. "Investigation of Dairy Wastewater Using Biowish." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1325.

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Various bacterial products from BiOWiSHTM Technologies have been tested in dairy wastewater experiments to determine the bacterial mixes’ ability for enhanced degradation of biochemical oxygen demand (BOD), solids, and nitrate concentrations. The dairy wastewater was augmented with various bacterial composition obtained from BiOWiSHTM. The bacterial mixes experimented were US Aqua, Thai Aqua, BMT, Osprey, Fruit Wash, KLB, LCM1, and MDG. Method development was a crucial process to optimize and test the effects of the BiOWiSHTM Technologies bacterial mixes. After 5 experiments, the BOD tests sho

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Heimel, Daniel Eric. "Anaerobic Co-digestion of Wastewater Treatment Pond Algae with Wastewater Sludge." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/440.

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Microalgae harvested from wastewater treatment ponds can be anaerobically digested to produce biogas, a renewable fuel resource. However, past experiments have shown some limitations of algae digestion. Algal cell walls are thought to be resistant to digestion, and the high protein content of algae can lead to ammonia toxicity in digesters. Co-digestion of algae with substrates containing higher C:N ratios (e.g., waste paper) can be used to maintain non-inhibitory ammonia concentrations and increase methane production. However, high carbon waste co-substrates have become costly or are not read

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Limpert, Alexandra D. "Field Emissions of Methane and Nitrous Oxide from California Landfills." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2027.

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Comprehensive and systematic aerial and field investigations were conducted at representative California landfills to quantify emissions of methane and nitrous oxide. Landfills are highly engineered; however, they are one of the largest anthropogenic sources of greenhouse gases, causing human health and safety concerns. Methane (CH4) and nitrous oxide (N2O) are significant greenhouse gases with high global warming potentials that are generated in a landfill environment. For site selection, sites were evaluated based on waste in place, climate zone, faults and oil and gas operations, population

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Bowen, Christian A. "Effects of Raceway Pond Water and Nutrient Recycling on Microalgae Production and Harvesting." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1896.

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To be environmentally sustainable, algae biofuel production requires extensive recycling of water and nutrients during algae cultivation. Such recycling can be in the form of reuse of external wastewaters, such as from municipal sewers, but, to achieve significant biofuels production, internal recycling at the algae farms is also needed. A potential difficulty with internal recycling is the accumulation of auto-inhibitory compounds in recycled algae pond water. An additional concern is that nutrients in the residuals from algae biofuel manufacturing will be only partly bioavailable. Both these

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Ward, Courtney E. "ASSESSING NEAR-FIELD OUTDOOR CONCENTRATION VARIABILITY FROM RESIDENTIAL WOOD SMOKE COMBUSTION SOURCES." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/122.

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ABSTRACT Assessing Near-Field Outdoor Concentration Variability from Residential Wood Smoke Combustion Sources Courtney Ward The primary goal of this research was to determine whether near field effects from residential wood smoke emissions have a significant impact on acute and/or average PM2.5 concentrations, and therefore health risks. To this end, three primary research objectives were addressed: (1) measurement of the variability of wood smoke concentrations within a residential neighborhood with wood smoke sources, (2) establishment of whether the magnitude of near-source contributions

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Van, Rooyen G. C. (Gert Cornelis). "Structural analysis in a distributed collaboratory." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53069.

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Thesis (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Structural analysis is examined in order to identify its essential information requirements, its fundamental tasks, and the essential functionalities that applications which support it should provide. The special characteristics of the information content of structural analysis and the algorithms that operate on it are looked into and exploited to devise data structures and utilities that provide proper support of the analysis task within a local environment, while presenting the opportunity to be extended to the conte

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Douries, William John. "Factors influencing asphalt compactibility and its relation to asphalt rutting performance." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16311.

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Thesis (MScIng)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: This thesis covers the factors affecting compactibility of hot mix asphalt including gradation, filler/binder ratios, binder types, binder content, polymer modification, temperature, volumetric properties etc. The study is not limited to compactibility as the property measured, but also on the influence of these factors on the mix’s capacity to resist permanent deformation or rutting. An experimental design was used with a variety of the above factors being included. Laboratory analysis of the mixes as well as acceler

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Dzvukamanja, T. N. (Tembiwe Nunana). "Development of provisional guidelines for the treatment of scale and resolution in assessing streamflow reduction impacts of alien plant infestations and commercial afforestation in water resources modelling studies." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50319.

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Thesis (MScEng)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: Experiments conducted on afforested catchments in South Africa have shown that alien trees can cause substantial reductions in catchment runoff (Scott et ai, 2000). In recognition of the impact which alien trees can have on the country's water resources, commercial afforestation was declared a stream flow reduction activity (SFRA) in terms of the National Water Act (NW A) (No. 36 of 1998), and the Department of Water affairs and forestry launched the Working for Water Programme (WfW) in 1995 with the recovery of wat

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Canto, R. R. "The rating of compound sharp-crested weirs under modular and non-modular flow conditions." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/52005.

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Thesis (MEng)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: The compound sharp-crested weir, which consists of two or more notches at different elevations, is the most common type of flow gauging structure found in South Africa. The Department of Water Affairs and Forestry (DWAF) is responsible for the operation of these weirs. They are currently experiencing the following problems regarding flow measurement with compound sharp-crested weirs: 1. During free-flow conditions, also known as modular flows, there is uncertainty about the accuracy of the discharge formulas. Although

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Visser, Christo Riaan. "Mechanical and structural characterisation of extrusion moulded SHCC." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/18712.

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Thesis (MScIng)--University of Stellenbosch, 2007.<br>ENGLISH ABSTRACT: SHCC (Strain-Hardening Cement-based Composite) is a type of HPFRCC (High Performance Fibre Reinforced Cement-based Composite) that was designed and engineered to overcome the weaknesses of ordinary concrete. It shows a high ductility as it can resist the full tensile load at a strain of more than 3%. This superior response is achieved with multiple cracking under tensile loading which has a pseudo strain-hardening phenomenon as a result. The purpose of the research project reported in this thesis document was to desig

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Bruce, H. G. S. "The rating of sluicing flumes in combination with sharp-crested and crump weirs under modular and non-modular flow conditions." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/52006.

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Thesis (MEng)--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: As part of a previous WRC project, three types of sluicing flumes were developed for use in compound weirs in combination with sharp-crested and crump weirs, (Rossouw et al., 1998). These sluicing flumes have several advantages which make them ideal structures for flow measurement in South African rivers. These are a high modular limit, stable modular flow characteristics, an ability to measure a wide range of flows accurately, as well as good sediment handling characteristics. These three flumes have been calibrated

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Theron, Louis Francois. "Personnel Allocation for Engineering Projects." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86295.

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Thesis (MEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The logical allocation of tasks in engineering offices currently relies heavily on the experience and intuition of project managers. In large scale projects the complexity of the task allocation procedure exceeds the capacity of human intuition, and a systematic technique is required to aid project managers in assigning tasks to individuals. In this project such a systematic technique is modelled and implemented using the Java programming language. An equation was developed to calculate an individual’s workload, and used in con

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Kumar, Sujay V. "Vitri - A Generic Framework for Engineering Decision Support Systems on Heterogeneous Computer Networks." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-20020225-084940.

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<p>Vitri is an object-oriented framework implemented in Java for high-performancedistributed computing. Using Vitri, applications can engage in cooperativeproblem solving by dividing their tasks among heterogeneous clusters of workstations and PCs. Vitri's features include basic support fordistributed computing and communication, as well as visual tools for evaluating run-time performance, and modules for heuristic optimization. It balances loads dynamically using a client-side task pool, allows theaddition or removal of servers during a run, and provides fault tolerance transparently for serv

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Nuntasunti, Suchart. "The Effects of Visual-Based Information Logistics in Construction." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-01052004-212738/.

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The construction industry has, for sometime, suffered from stagnant productivity, high accident rate, project delays, and poor quality. Research studies have shown that the major cause of these performance problems is the lack of effective communication. This research was launched to investigate the usefulness of a comprehensive information logistics model on construction process performance. In order to test and validate key components of the model, a prototype network system named Visual-based Integrated Wireless Site (V-IWS) was developed and tested on a mid-size building construction proje

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Liao, Jiangying. "Quantifying Activated Sludge Bulking-Causative Filamentous Bacteria Using Molecular Methods." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-01222003-102459/.

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Filamentous bulking is a widespread problem in activated sludge wastewater treatment plants. In North Carolina, 63% of wastewater treatment plants (WWTPs) surveyed have experienced bulking. Determining the dominant bulking-causative bacteria and their level of proliferation is a necessary step in bulking control. This study used molecular techniques, i.e. quantitative Fluorescent in situ Hybridization (FISH) and membrane hybridization to identify and quantify the specific filamentous microorganisms and their threshold values for causing bulking in both lab scale reactors and full scale treatme

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Grasso, Barton. "Benchmarking the Management of Construction Programs." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-03222007-001859/.

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The management of large capital improvement construction programs involves the efforts of both internal staff and external service providers. An understanding of how construction programs are managed, either through internal or external staff, is essential in tracking future trends and determining improvements and best practices in the management process. To address this need a survey was developed by a focus group of industry professionals. The survey was distributed to the membership of a number of professional organizations that represented owners within the construction industry. The surve

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Tagliaferri, Anthony Paul. "Use and Comparison of Traffic Simulation Models in the Analysis of Emergency Evacuation Conditions." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-03232005-185245/.

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The evacuation of vulnerable coastal areas in the event of an emergency such as an impending hurricane has become a significant safety issue due to the rapid growth of both permanent and tourist populations in these areas. Highway capacity has often not been upgraded in line with this demand growth. In the case of Hurricane Floyd in 1999, evacuations of areas of North and South Carolina resulted in several highly congested primary highways and, as a result, several states created Lane Reversal Plans for interstates and/or divided highways along evacuation routes. However, these plans were crea

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Devineni, Naresh. "Seasonal Hydroclimatology of the Continental United States: Forecasting and its Relevance to Water Management." NCSU, 2010. http://www.lib.ncsu.edu/theses/available/etd-03252010-193310/.

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Recent research in seasonal climate prediction has focused on combining multiple atmospheric General Circulation Models (GCMs) to develop multimodel ensembles. A new approach to combine multiple GCMs is proposed by analyzing the skill of candidate models contingent on the relevant predictor(s) state. To demonstrate this approach, we combine historical simulations of winter (December-February, DJF) precipitation and temperature from seven GCMs by evaluating their skill â represented by Mean Square Error (MSE) â over similar predictor (DJF Nino3.4) conditions. The MSE estimates are converted int

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Cropper, Michael Evan. "Analytical and Experimental Investigation of the Damping Matrix in Shear Building Models." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-03282006-113719/.

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In this thesis, we present a study conducted on investigating the nature of damping matrix associated with multi degree of freedom simple shear building models. The various conventional methods of creating damping matrices in structures are summarized and numerical examples are used to illustrate the inconsistencies among them. Numerical examples are also used to illustrate the significance of non-zero off diagonal terms in the transformed damping matrix obtained after pre and post multiplication with mode shape matrix, i.e. the significance of non-classical nature of damping matrix in certain

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Reynolds, William Leonard. "Sustainable Service Rate Analysis at Signalized Intersections with Short Left Turn Pockets Using Macroscopic Simulation." NCSU, 2010. http://www.lib.ncsu.edu/theses/available/etd-03302010-171706/.

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A macroscopic simulation tool is developed and tested in order to quantify the effects of short turn pockets on the sustainable service rate of a signalized intersection. Unlike the theoretical signal capacity, the sustainable service rate includes queue interaction effects and is thus influenced by blockage and spillback at the entrance to a short turn pocket. Previous research on the topic has focused either on the probability of spillback from a short turn pocket or the operation of a system with a single approach lane. No macroscopic model currently available has the ability to analyze thr

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Fisher, Seth T. "Development of a Simplified Procedure to Predict Dead Load Deflections of Skewed and Non-Skewed Steel Plate Girder Bridges." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-04082006-092019/.

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Many of today?s steel bridges are being constructed with longer spans and higher skew. As a result, the North Carolina Department of Transportation (NCDOT) has experienced numerous problems in predicting the dead load deflections of steel plate girder bridges. In response to these problems, the NCDOT has funded this research project (Project Number 2004-14). Common dead load deflection prediction methods, which traditionally utilize single girder line (SGL) analysis, have been shown to over predict the dead load deflections; the inaccuracy can result in various costly construction delays and m

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Liu, Li. "Real-time Contaminant Source Characterization in Water Distribution Systems." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-04122009-193753/.

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Accidental/intentional contamination continues to be a major concern for the security management in water distribution systems. Once a contaminant has been initially detected, an effective algorithm is required to recover the characteristics of the contaminantâs source based on dynamically varying streams of sensor observations. This dissertation focuses on the development and demonstration of a new algorithm to characterize a contaminant source quickly, accurately, and robustly. An evolutionary algorithm (EA)-based adaptive dynamic optimization technique (ADOPT) is proposed, potentially provi

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Lunn, Dillon Stewart. "Behavior of Infill Masonry Walls Strengthened with FRP Materials." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-04282009-143603/.

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Collapse of unreinforced masonry (URM) structures, including infill walls, is a leading cause of property damage and loss of life during extreme loading events. Many existing structures are in need of retrofit to bring them in compliance with modern design code provisions. Conventional strengthening techniques are often time-consuming, costly, and add significant weight to the structure. These limitations have driven the development of alternatives such as externally bonded (EB) glass fiber reinforced polymer (GFRP) strengthening systems, which are not only lightweight, but can be rapidly appl

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Cowie, Stephen James. "Emission of Non-methane Organic Compounds (NMOCs) and Hazardous Air Pollutants (HAPs) from Decomposing Refuse and Individual Waste Components and Under Different Conditions." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-05032004-150500/.

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Lab scale reactors were used to measure the emissions of non-methane organic compounds (NMOCs)and hazardous air pollutants (HAPs) from decomposing refuse. Reactors containing municipal solid waste (MSW) as well as reactors containing individual waste components (paper waste, yard waste, food waste, household hazardous waste) were operated under anaerobic conditions with leachate neutralization and recycle. Decomposition of MSW under aerobic and nitrate-reducing conditions was also studied. NMOC yields ranged from 0.016 mg-C/dry gm (paper) to 0.347 mg-C/dry gm (food). The data suggest that vola

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Wylie, John Curtis. "Experimental Testing of Unreinforced Masonry Walls Strengthened with Orthogonal Near-Surface Mounted CFRP Subjected to Out-of-Plane Loading." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-05122009-152004/.

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Unreinforced masonry (URM) structures comprise a considerable proportion of the building stock worldwide. However, these structures generally do not behave well under extreme wind or earthquake loading. As part of on-going research, methods of repairing or strengthening URM walls subject to out-of-plane loading using fiber-reinforced polymers (FRP) are being investigated. For several reasons, one method showing particular promise is the use of near-surface mounted (NSM) Carbon FRP strips. Research to-date has made significant progress in quantifying the fundamental behavior of the bonded FRP-t

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Hopkins, Daniel Cory. "Characterizing the Spatial Variation in Particle Aggregation due to Heterogeneous Turbulence in a Flocculation Reactor." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-06132002-125938/.

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A study was performed to investigate the impact of turbulent heterogeneity on aggregation and breakup in a flocculation reactor. The influence of the average characteristic velocity gradient (G), particle concentration, and coagulation mechanism on the flocculation performance was also investigated. Experiments were performed in a bench-scale reactor with a low-shear axial-flow impeller using a photometric dispersion analyzer (PDA) to examine the state of aggregation. Results indicated that floc growth increased while the floc size and variance in the floc size distribution decreased as G incr

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