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1
Besar, Jusoh bin. "Load capacity of pile foundations : load test interpretation hypotheses." Thesis, Cardiff University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309047.
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Sahboun, Salahaddin. "V-band joint torsional load capacity." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/28321/.
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This research thesis presents an analysis of the torsional loads on V-band clamps. In some applications, the relative rotational movement of the flanges connected by V-band clamps can result in catastrophic system failure. The ability to understand the factors impacting on torsional load capacity is therefore essential. In this research project, a theoretical model of a V-band joint subjected to torsional loads was developed. This model is used to identify those parameters that will impact on the joint’s reliability. An experimental investigation was conducted to validate a theoretical model using a newly developed test rig. The development and features of this test rig are presented in this report. This experimental investigation also allowed the impact of those parameters that are difficult to control, to be determined. A total of three V-bands were used with different diameters but nominally identical cross sections were studied. In the research results, the initial slip point between flanges and the V-band clamp was identified by experimentation within this research project. Different sizes of Vbands were used under boundary conditions and loads. From the simulation results it was determned that the friction effect on the V-band depends on the size of the V-band. For the largest size of V-band, there was moderate correlation of the experimental and theoretical results. For the smallest size, the results suggest that with band tightening, flange contact is localised, rather than being throughout the band’s entire circumference. The research demonstrated the significant relevance of the band and flanges’ contact points and the coefficient of friction, especially that between the flanges, on the V-band clamp’s theoretical torsional load capacity.
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Waja, Aadil Ahmed. "Load recorder." Thesis, Cape Technikon, 1987. http://hdl.handle.net/20.500.11838/1165.
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Thesis (Masters Diploma (Electrical Engineering)) --Cape Technikon, Cape Town, 1987This thesis describes the development of a computerized Load Recorder. The load recorder is used by the Cape Town City Council to assist in the tariff investigation of electricity consumers. This investigation assists the consumers in selecting the best cost effective electricity tariff. It also motivates the consumers to maintain a constant load which in turn assists the Council in supplying the required electricity. The load recorder replaces a manual and time consuming method used in conducting the tariff investigation. The development of the load recorder involved the design of hardware and software. It was designed in a compact enclosure to hook up to the electricity meters of the consumer for a period of 7 days. The software was designed in the 6805 assembly language to log data and record the electricity load every 15 or 30 minutes for this period. At the end of this period the data is downloaded into the HP85 personal computer. A basic program was designed for the HP85 to analyse and compute the downloaded data. A graphical representation and analysis is printed by the HP85 computer. The given graph of the results represents the electricity used for this period. The tariff rates are analysed and calculated to determine the best cost effective tariff. A CMOS micro computer intergrated circuit was chosen due to the determined specification of the load recorder. In order to make the development of the load recorder possible an aid (tool) had to be designed and built for the chosen microprocessor. This development aid, the emulator, is included as part of this thesis. The Motorola exorciser only supported a cross assembler for the chosen microprocessor family. The emulator was designed and built to enable testing and debugging on the Exorciser. The development on the emulator involved a detailed analysis of the Exorciser development system. The emulator was designed using hardware and software. The hardware emulator board was designed as a standard Motorola size card which plugs into the Exorciser. The software was designed for the 6809 exorciser and for the 6805 emulator. The emulator was soak tested and debugged during the development of the load recorder. The emulator opened further avenues for future microcomputer design projects especially where a confined area and compactness is an important factor. The design and development of the emulator and the load recorder was conducted in the Computer Section of the City Electrical Engineer's Department of Cape Town.
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Erdal, Ferhat. "Ultimate Load Capacity Of Optimally Designed Cellular Beams." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613007/index.pdf.
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Cellular beams became increasingly popular as an efficient structural form in
steel construction since their introduction. Their sophisticated design and
profiling process provides greater flexibility in beam proportioning for
strength, depth, size and location of circular holes. The purpose of
manufacturing these beams is to increase overall beam depth, the moment of
inertia and section modulus, which results in greater strength and rigidity.
Cellular beams are used as primary or secondary floor beams in order to
achieve long spans and service integration. They are also used as roof beams
beyond the range of portal-frame construction, and are the perfect solution for
curved roof applications, combining weight savings with a low-cost
manufacturing process.
The purpose of the current research is to study optimum design, ultimate load
capacity under applied load and finite element analysis of non-composite
cellular beams. The first part of the research program focuses on the optimum
design of steel cellular beams using one of the stochastic search methods called
&ldquoharmony search algorithm&rdquo
. The minimum weight is taken as the design objective while the design constraints are implemented from the Steel Construction Institute. Design constraints include the displacement limitations, overall beam flexural capacity, beam shear capacity, overall beam buckling strength, web post flexure and buckling, vierendeel bending of upper and lower tees and local buckling of compression flange. The design methods adopted in this publication are consistent with BS5950. In the second part of the research, which is the experimental work, twelve non-composite cellular beams are tested to determine the ultimate load carrying capacities of these beams under using a hydraulic plug to apply point load. The tested cellular beam specimens have been designed by using harmony search algorithm. Finally, finite element analysis program is used to perform elastic buckling analysis and predict critical loads of all steel cellular beams. Finite element analysis results are then compared with experimental test results for each tested cellular beam.
5
Supachawarote, Chairat. "Inclined load capacity of suction caisson in clay." University of Western Australia. School of Civil and Resource Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0188.
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This thesis investigates the capacity and failure mode of suction caissons under inclined loading. Parametric finite element analyses have been carried out to investigate the effects of caisson geometry, loading angle, padeye depth (i.e. load attachment point), soil profile and caisson-soil interface condition. Displacement-controlled analyses were carried out to determine the ultimate limit state of the suction caissons under inclined load and the results presented as interaction diagrams in VH load space. VH failure interaction diagrams are presented for both cases where the caisson-soil interface is fully-bonded and where a crack is allowed to form along the side of the caisson. An elliptical equation is fitted to the normalised VH failure interaction diagram to describe the general trend in the case where the caisson-soil interface is fully-bonded. Parametric study reveals that the failure envelope in the fully-bonded case could be scaled down (contracted failure envelope) to represent the holding capacity when a crack is allowed to form. A stronger effect of crack on the capacity was observed in the lightly overconsolidated soil, compared to the normally consolidated soil. The sensitivity of caisson capacity to the changes in load attachment position or loading angle was quantified based on the load-controlled analyses. It was found that, for caisson length to diameter ratios of up to 5, the optimal centreline loading depth (i.e. where the caisson translates with no rotation) is in the range 0.65L to 0.7L in normally consolidated soil, but becomes shallower for the lightly overconsolidated soil profile where the shear strength profile is more uniform. The reduction of holding capacity when the padeye position is shifted from the optimal location was also quantified for normally consolidated and lightly overconsolidated soil profiles at loading angle of 30 [degrees]. Upper bound analyses were carried out to augment the finite element study. Comparison of holding capacity and accompanying failure mechanisms obtained from the finite element and upper bound methods are made. It was found that the upper bound generally overpredicted the inclined load capacity obtained from the finite element analyses especially for the shorter caisson considered in this study. A correction factor is introduced to adjust the upper bound results for the optimal condition. Comparisons of non-optimal capacity were also made and showed that the agreement between the upper bound and finite element analyses are sensitive to the change in the centreline loading depth when the caisson-soil interface is fully bonded, but less so when a crack forms.
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ALVES, JOABSON LIMA. "NUMERICAL EVALUATION OF LOAD CAPACITY OF CORRODED PIPES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2002. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2761@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORDutos são sistemas amplamente utilizados para o transporte de óleo e gás. Desta forma, é importante que o mesmo opere com eficiência e segurança. Com o passar do tempo os dutos podem sofrer danos que podem causar prejuízos à sua integridade estrutural e, consequentemente, prejuízo financeiro às indústrias que os operam. Uma das formas mais comuns de danos presentes nos dutos é a corrosão. Esta pode comprometer a sua capacidade de carga. Com isto, a determinação da resistência remanescente de dutos corroídos tornou-se objeto de estudo de vários pesquisadores em todo o mundo. Métodos empíricos utilizados para esta determinação foram desenvolvidos e estão disponíveis na literatura, e muitos deles são aplicáveis apenas em dutos submetidos à pressão interna. Entretanto estes métodos se mostram, em geral, bastante conservadores nesta determinação. Assim, métodos alternativos têm sido desenvolvidos baseados no método dos elementos finitos. Este trabalho tem como objetivo avaliar a capacidade de carga de dutos corroídos submetidos a carregamentos combinados que tentam simular os que ocorrem no campo. Estes carregamentos são: pressão interna, momento fletor e cargas axiais. Carregamentos axiais são provenientes da variação de temperatura e do efeito Poisson existente nas extremidades dos dutos devido à pressão interna. Neste trabalho realizou-se a modelagem de dutos submetidos à carregamentos combinados, onde se tentou reproduzir ao máximo as condições de ensaio. Tomou-se como base ensaios experimentais e numéricos encontrados na literatura. Aspectos globais sobre a modelagem são detalhados. A modelagem dos exemplos aqui apresentados foi desenvolvida no programa comercial ABAQUS Versão 6.1.
Pipelines are widely employed systems by the transport of oil and gas. Due to its great extensions and to economic and environmental reasons it is important to assure safe and efficient operation of the pipelines. After some time of operation the pipes can present damage that can affect its structural integrity, and require for repair and even operation interruption with consequently financial losses for the pipeline operating industries.One of the most commonly registered defects by pipes is corrosion. The determination of the residual load capacity of corroded pipes is object of study of many researchers all over the world. With this effort empirical methods were developed and are widely employed. Most of these methods are however applicable to pressure loaded pipes, and do not take into account more complex combined loading. Additionally highly conservative results are obtained by these methods. Alternative methods have been developed based on the finite element method.The objective of this work is to evaluate the load capacity of corroded pipes subjected to combined loading, which simulates the loads in field. These include internal pressure, bending due to soil settlement and axial load representing thermal effects. In this work the pipe model was developed in order to reproduce the experimental end field conditions. Global aspects of pipe modeling are discussed. Experimental test results and numerical analysis present in the literature are taken for comparison.The examples were analyzed with the commercial finite element code ABAQUS version 6.1.
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Berzell, Carl. "Load capacity of grouted rock bolts in concrete dams." Thesis, KTH, Betongbyggnad, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147180.
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The purpose of this thesis is to evaluate the contribution of grouted rock bolts on the stability of concrete dams. The load capacity of the grouted rock bolts are assessed considering eventual deteriorating processes. An additional objective was to compare the resulting load capacity with the prevailing regulations in RIDAS (the power companies’ guidelines on dam safety) and possibly suggest new guideline values. The literature study consists of two parts; concrete dams and grouted rock bolts. In the first part concrete dams are discussed and especially the inherent forces and aspects when controlling their stability. The second part treats grouted rock bolts and the theoretical focus is on their function and possible failure modes as well as on the degrading processes (primarily corrosion) that are affecting the rock bolts. Subsequently, the theory was applied on the Swedish concrete buttress dam Storfinnforsen, which is the largest concrete dam in Sweden. The dam was selected for this study mainly because its shape is archetypical for buttress dams. In addition, a digitalized model of the dam was obtainable from previous research projects. A numerical analysis with the finite element analysis software ABAQUS was performed in order to evaluate the stability of the dam and to support the analytical analysis. The load capacity of the grouted rock bolts was analytically evaluated with consideration to eventual degradation. Assuming a corrosion rate of 60 μm/year, the grouted rock bolts in Storfinnforsen could after 100 years be trusted with a load capacity of approximately 180 MPa. That load capacity is due to shear failure, which constitutes the most plausible failure mode for rock bolts in buttress dams. The value 180 MPa is to be seen in contrast to the current limitation of 140 MPa that is defined in RIDAS (2011). The conclusion of this thesis is accordingly, that the maximum allowed load capacity that can be assigned the grouted rock bolts in the stability calculations of concrete dams can be increased from todays 140 MPa. This conclusion is substantiated by the analytical analyses with the numerical calculations as support.
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Hsiaw, Jennifer S. (Jennifer Sing-Yee). "Seismic load-resisting capacity of plastered straw bale walls." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60773.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 57-58).
Straw bales have been incorporated into buildings for centuries, but only recently have they been explored in academic settings for their structural potential. Straw bale building is encountering a growing audience due to its social and economic benefits. Plastered and reinforced straw bale wall assemblies have been found comparable to wood frame construction in resisting vertical and lateral loads. A number of straw bale residences have been constructed in the highly seismic state of California, while recent efforts have expanded its presence to quake-prone areas in developing countries like Pakistan and China. As this is a burgeoning arena of research, only empirical tests have been conducted. This thesis introduces a computer simulation of a wall assembly under lateral loading, using two techniques: a multi-layer shell element and an equivalent compression strut frame in SAP2000. The models assume homogeneity, and based on the results, areas for improvement and further research are suggested.
by Jennifer S. Hsiaw.
M.Eng.
9
Savchenko, L., O. Ursulian, Л. Савченко, and О. Урсулян. "The impact of vehicles load capacity on road infrastructure." Thesis, National Aviation University, 2022. https://er.nau.edu.ua/handle/NAU/54828.
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Quality of transport infrastructure determines the quality of the provision of services for the transportation of goods and passengers. The infrastructure sector is a guarantee of efficiency, mobility and uninterrupted economic activity. However, the high quality of the transport infrastructure implies significant and long-term investments. Moreover, dependence of load capacity and infrastructure cost per mile is exponential, which proves the detrimental effect of large vehicles, especially overloaded ones, on the roadway and infrastructure facilities. Visually, this can be observed in the form of rutting, which leads to a significant decrease in the speed of transportation, and also increases the accident rate of the road and shortens its service life before major repairs.Якість транспортної інфраструктури визначає якість надання послуг з перевезення вантажів і пасажирів. Сектор інфраструктури є запорукою ефективності, мобільності та безперебійної економічної діяльності. Однак висока якість транспортної інфраструктури передбачає значні та довгострокові інвестиції. Крім того, залежність вантажопідйомності та вартості інфраструктури на милю має експоненційний характер, що свідчить про згубний вплив великогабаритних транспортних засобів, особливо перевантажених, на проїжджу частину та об’єкти інфраструктури.
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To, Albert C. (Albert Chi Fu) 1975. "Lateral load capacity of drilled shafts in jointed rock." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/40018.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.Includes bibliographical references (p. 263).
Large vertical (axial) and lateral loads often act on the heads of drilled shafts in jointed rock. In current design practice, the p-y curve method used in design of laterally loaded drilled shafts in soil is adopted in the design of such shafts in jointed rock. The p-y curve method treats the soil as a continuum. The continuum model is not applicable to jointed rock, in which the joints form blocks. A new discontinuum model was developed in this thesis to determine the lateral load capacity of drilled shafts in a jointed rock mass with two and three joint sets. It contains two parts: a kinematic and a kinetic analysis. In the kinematic analysis, the removability theorem of a convex block is expanded to analyze the removability of a block intersecting a pile and the removability of a combination of blocks. Based on these removability theorems, a method was developed to select removable combinations of blocks using easily constructed 2-dimensional figures only. In kinetics, each selected removable combination of blocks is analyzed with the limit equilibrium approach to determine the ultimate lateral load capacity. Although the analysis is similar to slope stability analysis, it is more complicated with the addition of a lateral force exerted by the pile and the vertical pile load exerted on the wedge. The analysis also considers the weight of the wedge, the shearing resistance along the joints, and the vertical pile load exerted on the wedge. Simple analytical relations were developed to solve for the ultimate lateral load capacity.
by Albert C. To.
S.M.
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Carroll, Jeffery D. "Withdrawal and combined load capacity of threaded fastener wood joints /." This resource online, 1988. http://scholar.lib.vt.edu/theses/available/etd-04122010-083654/.
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Carroll, Jeffrey D. "Withdrawal and combined load capacity of threaded fastener wood joints." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/42043.
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Gearhart, Gregory P. Jr. "Synthesis Study on Load Capacity of Concrete Slabs without Plans." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522057637077884.
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Jamali, Shojaeddin. "Assessing load carrying capacity of existing bridges using SHM techniques." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/134484/1/Shojaeddin_Jamali_Thesis.pdf.
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This research provides a multi-tier framework for load carrying capacity assessment of bridges using structural health monitoring techniques. In this framework, four tiers are developed ranging from simplified to detailed tiers for holistic bridge assessment. Performance of each tier has been validated using various numerical and experimental examples of bridges and beam-like structures.
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Lowry, Sonia L. "Analysis of statnamic load test data using a load shed distribution model." [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001238.
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Cabe, Gregory D. (Gregory David). "Non-invasive measurement of load capacity of trabecular bones with defects." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43338.
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Chow, Ka-po. "Load-balancing in distributed multi-agent computing /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B2295644x.
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Pomares, Bleda Laura. "Analysis of load capacity in the low voltage network for different electricity load scenarios in Hammarby Sjöstad, Stockholm." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264283.
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Sweden’s population is growing rapidly, especially in the southern areas like Stockholm, where the electricity consumption is higher. Therefore, more electricity will need to be transported from north to south, from where it is produced to where it is consumed. The current electric infrastructure, i.e. the transmission and distribution networks, will need to be able to handle this consumption increase. Moreover, transition through a more sustainable cities, notably in the transport sector with the increase in electric vehicle use and electrification of public transport sector, would rise even more the electricity needs. Increase in Stockholm’s electricity consumption is not possible due to capacity limitations and grid restrictions. The situation is already strained for the city and further electricity consumption would cause several contingences. The aim of this project is to analyze the impact of the increase in electricity demand due to population growth and the integration of electric vehicles on the low voltage network in one of Stockholm’s districts, Hammarby Sjöstad. In order to analyze it, six scenarios have been simulated, one base scenario representing today’s situation, four short-term scenarios for 2025 and one long-term scenario for 2040. Different EVs penetration levels are considered, as well as two different charging schedules, following an uncontrolled charging strategy. The results show that if today’s EV sales trend remains, the low voltage grid would be able to operate properly. However, if a massive increase of EV occurred, several problems would appear. For evening charging, at peak hour the load would increase around 20%, transformers of two of the four analyzed substations would be overloaded. Problems of power quality and line overloading would appear as well. For night charging, the peak gets displaced to night hours but the network situation is similar to the previous case. Even though a 100% of EV integration is not likely to happen by 2025, it could occur by 2040. Thus, actions on the grid would need to be done if the charging remains uncontrolled. By controlling the charging schedule or introducing load management, for instance by being able to manage the energy on the battery, the problem may be reduced.Stockholm växer snabbt. Distributionsnätets situation är redan ansträngd och ytterligare elförbrukning skulle orsaka flera händelser. Syftet med detta projekt är att analysera effekterna av ökningen av elbehov på grund av befolkningsökning och integration av elfordon i lågspänningsnätet i ett av Stockholms distrikt, Hammarby Sjöstad. Nätverksmodellen byggdes upp i PandaPower, ett Python-verktyg för att analysera kraftsystem, från högspänningsnätet till lastbussarna. Sex scenarier har simulerats, ett basscenario som representerar dagens situation, fyra kortvariga scenarier för 2025 och ett långsiktigt scenario för 2040. Olika EV-penetrationsnivåer beaktas, liksom två olika laddningsscheman, efter en okontrollerad laddningsstrategi. Resultaten visar att om dagens EV-försäljningstrend kvarstår, skulle det existerande lågspänningsnätet vara funktionsdugligt. Men om en massiv ökning av EV inträffade skulle flera problem dyka upp. För kvällsladdning skulle belastningen öka med 20% vid topptimmarna, två transformatorer av de fyra analyserade transformatorstationerna skulle överbelastas. Problem med elkvalitet och överbelastning av elnätet skulle också uppstå. För nattladdning förflyttas toppen till natttimmar men nätverkssituationen liknar det föregående fallet. Även om en 100% av EVintegrationen inte troligtvis kommer att ske senast 2025, kan den inträffa år 2040. Åtgärder på nätet skulle därför behöva göras om laddningen förblir okontrollerad. Genom att kontrollera laddningsschemat eller införa lasthantering, till exempel genom att kunna hantera energin på batteriet, kan problemet reduceras.
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Ross, Justin Henry. "Evaluating ultimate bridge capacity through destructive testing of decommissioned bridges." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 154 p, 2007. http://proquest.umi.com/pqdweb?did=1338919151&sid=8&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Thesis (M.C.E.)--University of Delaware, 2007.Principal faculty advisors: Michael J. Chajes and Jennifer Righman McConnell, Dept. of Civil & Environmental Engineering. Includes bibliographical references.
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Abood, Awad Shihan. "Load capacity of piled foundations under non-cyclic and cyclic uplift loading." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329618.
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Dubdub, Ahmad Jassim. "Load capacity of piled foundations under non-cyclic and cyclic compressive loading." Thesis, Cardiff University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309371.
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BLANCO, FLAVIO ANTONIO FARINA PAZO. "GENERATING CAPACITY RELIABILITY EVALUATION CONSIDERING UNCERTAINTIES IN UNIT UNAVAILABILITY AND LOAD FORECASTING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1986. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9887@1.
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Este trabalho apresenta um método geral e prático,
baseado
em técnicas de convolução discreta, para avaliar o valor
esperado e a variância dos índices de perda de carga
associados a um sistema de geração. O método proposto
trata as indisponibilidades das unidades geradoras e os
valores estimados para os picos de carga como variáveis
aleatórias, especificadas por médias e variâncias, e
modela, sem qualquer restrição, geradores com estados de
capacidade intermediários. Também é mostrado como as
técnicas de Transformada Rápida de Fourier podem ser
aplicadas na solução deste problema.
O algoritmo proposto é aplicado a vários sistemas de
geração, incluindo o sistema teste de confiabilidade do
IEEE, e os resultados são discutidos.This work presents a pratical and general method based on discrete convolution techniques for evaluating the expectation and variance of the loss of load índices, for a single-area system, by treating forced outage rates and forecast peak loads as random variables with specified means and variances. The proposed method easily accounts for partial forced outage rates associated with unit derated states, without any restrictions. Also, it is shown how fast Fourier transtorm techniques can be used to carry out the discrete convolution. The proposed algorithm is applied to typical generating systems including the IEEE Reliability Test System, and the results are discussed.
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Chastain, Patrick Alan. "Effects of load proportioning on the capacity of multiple-hole composite joints." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/90922.
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This study addresses the issue of adjusting the proportion of load transmitted by each hole in a multiplehole joint so that the joint capacity is a maximum. Specifically two-hole-in-series joints are examined. The results indicate that when each hole reacts 50% of the total load, the joint capacity is not a maximum. One hole generally is understressed at joint failure. The algorithm developed to determine the load proportion at each hole which results in maximum capacity is discussed. The algorithm includes two-dimensional finite-element stress analysis and a failure criteria. The algorithm is used to study the effects of joint width, hole spacing, and hole to joint-end distance on load proportioning and capacity. To study hole size effects, two hole diameters are considered. Three laminates are considered: a quasi-isotropic laminate; a cross-ply laminate; and a 45 degree angle-ply laminate. By proportioning the load, capacity can be increased generally from 5 to 10%. In some cases a greater increase is possible.M.S.
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Patterson, Terri. "The Effect of Cognitive Load on Deception." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/121.
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The current study applied classic cognitive capacity models to examine the effect of cognitive load on deception. The study also examined whether the manipulation of cognitive load would result in the magnification of differences between liars and truth-tellers. In the first study, 87 participants engaged in videotaped interviews while being either deceptive or truthful about a target event. Some participants engaged in a concurrent secondary task while being interviewed. Performance on the secondary task was measured. As expected, truth tellers performed better on secondary task items than liars as evidenced by higher accuracy rates. These results confirm the long held assumption that being deceptive is more cognitively demanding than being truthful. In the second part of the study, the videotaped interviews of both liars and truth-tellers were shown to 69 observers. After watching the interviews, observers were asked to make a veracity judgment for each participant. Observers made more accurate veracity judgments when viewing participants who engaged in a concurrent secondary task than when viewing those who did not. Observers also indicated that participants who engaged in a concurrent secondary task appeared to think harder than participants who did not. This study provides evidence that engaging in deception is more cognitively demanding than telling the truth. As hypothesized, having participants engage in a concurrent secondary task led to the magnification of differences between liars and truth tellers. This magnification of differences led to more accurate veracity rates in a second group of observers. The implications for deception detection are discussed.
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NAKAMURA, Hikaru, Naoshi UEDA, Minoru KUNIEDA, and Ahmed KAMAL. "ASSESSMENT OF STRENGTHENING EFFECT ON RC BEAMS WITH UHP-SHCC." 日本コンクリート工学会, 2008. http://hdl.handle.net/2237/20917.
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Chow, Ka-po, and 周嘉寶. "Load-balancing in distributed multi-agent computing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B3122426X.
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Tong, Fan. "Capacity demand and climate in Ekerö : Development of tool to predict capacity demand underuncertainty of climate effects." Thesis, KTH, Elektroteknisk teori och konstruktion, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-152522.
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The load forecasting has become an important role in the operation of power system, and several models by using different techniques have been applied to solve these problems. In the literature, the linear regression models are considered as a traditional approach to predict power consumption, and more recently, the artificial neural network (ANN) models have received more attention for a great number of successful and practical applications. This report introduces both linear regression and ANN models to predict the power consumption for Fortum in Ekerö. The characteristics of power consumption of different kinds of consumers are analyzed, together with the effects of weather parameters to power consumption. Further, based on the gained information, the numerical models of load forecasting are built and tested by the historical data. The predictions of power consumption are focus on three cases separately: total power consumption in one year, daily peak power consumption during winter and hourly power consumption. The processes of development of the models will be described, such as the choice of the variables, the transformations of the variables, the structure of the models and the training cases of ANN model. In addition, two linear regression models will be built according to the number of input variables. They are simple linear regression with one input variable and multiple linear regression with several input variables. Comparison between the linear regression and ANN models will be carried out. In the end, it finds out that the linear regression obtains better results for all the cases in Ekerö. Especially, the simple linear regression outperforms in prediction of total power consumption in one year, and the multiple linear regression is better in prediction of daily peak load during the winter.
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Vimalaraj, Panchalingam. "A simple equation for bearing capacity of a shallow foundation." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1438933.
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Müller, Matthias. "Predicting the ultimate axial load capacity of joints formed using V-band retainers." Thesis, University of Huddersfield, 2011. http://eprints.hud.ac.uk/id/eprint/12144/.
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V-band retainers are widely used in the automotive, aircraft and aerospace industries to connect a pair of circular flanges to provide a joint with good axial strength and torsional rigidity. V-band retainers are manufactured using a cold roll forming process. Despite their wide application, once assembled to a pair of flanges little is known about the interaction between flange and band. Moreover the failure mode of V-band retainers when applying an axial load is not fully understood. In this thesis the ultimate axial load capacity of V-band retainers is predicted using finite element and theoretical models and validated using experimental testing. It was shown that the ultimate axial load capacity was strongly dependent on the joint diameter, increasing between 114mm and 235mm, and decreasing beyond that. Moreover, the peak in ultimate axial load capacity was dependent on parameters such as the axial clamping load and coefficient of friction, and its position lay between 235mm and 450mm, as predicted by the finite element models. Other geometrical parameters such as flange and band thickness showed large impacts on the ultimate axial load capacity as well. A theoretical model was developed that allowed the ultimate axial load capacity to be calculated from a single formula for larger bands and using a simple algorithm for smaller bands. This model supported the findings that, depending on the band diameter, the ultimate axial load capacity had a peak, but predicted its position at approximately 181mm. This position at 181mm was validated by the experimental data. However, when compared to the tests, the finite element and theoretical models both over-predicted the ultimate axial load capacity. Both the finite element models and practical tests showed that for small V-bands axial failure is due to a combination of section deformation and ring expansion, whereas large V-bands fail due to ring expansion only. These two distinct types of behaviour were incorporated into the theoretical model. The hardness development throughout the cold roll forming process was predicted using finite element models. This was validated by hardness measurements, for which a new technique was generated, that directly linked plastic strain and hardness values.
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Martin, Anthony George. "The ultimate load capacity of square shear plates with circular perforations : (parameter study)." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25119.
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The incremental structural analysis program NISA83 was used to investigate various parameters affecting the ultimate capacity of square plates with circular perforations subjected to uniform shear stress. Both nonlinear material properties and nonlinear geometry were taken into account in determining the ultimate in-plane capacities and buckling capacities of perforated shear plates.
The parameters investigated during this study were the hole size for a concentric location, and the hole location for a constant ratio of hole diameter to plate width of 0.2. In addition various doubler plates were studied to determine the most effective shape to restore a shear plate to its original ultimate in-plane capacity.
For the first two parameters, the analysis was separated into three parts. The ultimate in-plane capacity, elastic buckling capacity and the ultimate elastic-plastic buckling capacity was determined for each combination of the two parameters. These were used to identify the importance of both elastic buckling and nonlinear material contribute to the reduced ultimate plate capacities.
The results from plates with a concentrically located hole of varying size showed excellent correlation with other published experimental and analytical results for both the in-plane capacity and the 3-dimensional buckling capacities.
Variation of the center location of a hole of a standard size provided some significant results. Little change was found in the ultimate in-plane capacity for all hole locations. On the other hand, the elastic buckling capacity was raised by 50% after moving the hole from the plate tension diagonal to the compression diagonal. Finally, from the ultimate elastic-plastic' buckling capacity results it was concluded that the concentric provides lower bound capacity for all other hole locations. The in-plane analysis of the optimum doubler plate size showed wide and thin plates to be more effective than narrow and thick plates. A doubler plate with the same thickness as the plate and twice the diameter of the hole is recommended to restore the perforated plate to its original in-plane capacity.
In order to aid in the tedious task of checking the input data and to provide a convenient way of displaying the result, a full graphic post-processor was developed as part of this thesis. The program NISPLOT used color graphics available at the UBC Civil Engineering lab to process the output from NISA83. It was written in FORTRAN 77, utilizing subroutines from a commercial graphics package, DI3000, to obtain device independent graphics. NISPLOT generated plots of the nodes and element mesh for each data check. When a complete analysis was carried out by NISA83, nodes, element mesh, deflected shape, and color stress fill plots were generated.Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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Sun, Miao. "Use of Material Tailoring to Improve Axial Load Capacity of Elliptical Composite Cylinders." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29693.
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This study focuses on the improvement of the axial buckling capacity of elliptical composite cylinders through the use of a circumferentially-varying lamination sequence. The concept of varying the lamination sequence around the circumference is considered as a viable approach for off-setting the disadvantages of having the cylinder radius of curvature vary with circumferential position, the source of the reduced buckling capacity when compared to a circular cylinder with the same circumference. Post-buckling collapse behavior and material failure characteristics are also of interest. Two approaches to implementing a circumferential variation of lamination are examined. For the first approach the lamination sequence is varied in a stepwise fashion around the circumference. Specifically, each quadrant of the cylinder circumference is divided into three equal-length regions denoted as the crown, middle, and side regions. Eight different cylinders designs, whereby each region is constructed of either a quasi-isotropic or an axially-stiff laminate of equal thickness, are studied. Results are compared to the baseline case of an elliptical cylinder constructed entirely of a quasi-isotropic laminate. Since the thickness of the quasi-isotropic and axially-stiff laminates are the same, all cylinders weight the same and thus comparisons are meaningful. Improvements upwards of 18% in axial buckling capacity can be achieved with one particular stepwise design. The second approach considers laminations that vary circumferentially in a continuous fashion to mitigate the effects of the continuously-varying radius of curvature. The methodology for determining how to tailor the lamination sequence circumferentially is based on the analytical predictions of a simple buckling analysis for simply-supported circular cylinders. With this approach, axial buckling load improvements upwards of 30% are realized. Of all the cylinders considered, very few do not exhibit material failure upon collapse in the post-buckled state. Of those that do not, there is little, if any, improvement in bucking capacity. Results for the pre-buckling, buckling, post-buckling, and material failure are obtained from the finite-element code ABAQUS using both static and dynamic analyses. Studies with the code demonstrate that the results obtained are converged.Ph. D.
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Gami, Dhruv N. "Effective Load Carrying Capacity of Solar PV Plants: A case study across USA." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461281022.
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Aria, Shadi. "Load-settlement and stress-strain behaviour of geotextile-reinforced sandy soil." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2018. https://ro.ecu.edu.au/theses/2167.
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During the past few decades, many studies have been conducted to investigate the load-settlement behaviour of geosynthetic-reinforced foundations, and researchers proposed different methods to improve the performance of geosynthetic-reinforced foundation soils as well as to develop empirical equations to estimate their bearing capacity. In the recent past, using geotextile reinforcement with wraparound ends has been recommended to strengthen the foundation soil aimed at improving the effectiveness of using geosynthetic reinforcements. However, there are still areas that received far too little attention in the past, e.g. the optimum geometric parameters in geosynthetic-reinforced sandy soils with or without using wraparound reinforcement technique. An optimal design and the effectiveness of employing geosynthetic material for strengthening the foundation soil require an extensive knowledge of the load-settlement behaviour and failure mechanism of reinforced soils.
This thesis presents extensive laboratory measurements and numerical analysis conducted to (i) investigate the effect of angle of internal friction of soil on the optimum burial depth of the reinforcement and the bearing capacity of the geosynthetic-reinforced sandy soil based on numerical modelling, (ii) study the effects of reinforcement geometrical parameters, namely land width occupied by the reinforcement, and the lap length of the wrapped ends, based on numerical modelling, (iii) present experimental evaluations of the effectiveness of the wraparound reinforcement technique for improving the bearing capacity and load-settlement characteristics of sandy soils, and (Das & Sivakugan) study the strain distribution and the mobilisation of tensile modulus in geotextile reinforcement buried within the sandy soil. In the experimental phase, laboratory model strip footing tests were performed to investigate the influence of wraparound lap length and occupied land width on the load-settlement behaviour of sandy soil. In addition, an instrumentation program with pressure cells and strain gauges was designed to investigate stress and strain distribution within the sand bed. The test results show that the existence of wraparound ends of the geotextile reinforcement improves the bearing capacity of sand bed by about 70% comparing with reinforced foundation soil without wraparound ends. The strain distribution observations reveal that the theoretical solution may overestimate the tensile strength of the geotextile in the range of 30-60 % that can be due to the in-isolation methods being used by standards to measure the tensile modulus of geosynthetics.
In the numerical phase, first, a numerical model was built to investigate the effect of the angle of internal friction of sand on the optimum burial depth of geosynthetic reinforcement. Numerical outputs reveal that the optimum burial depth depends significantly on the angle of internal friction of sand, and has a linear relationship with the height of the active wedge beneath the footing. In the second stage, a parametric study of the wraparound reinforcement technique was carried out to investigate the effects of geometrical parameters of wraparound reinforcement on the bearing capacity of the sandy soil. The model was used to critically analyse the reinforcing mechanisms for improved bearing capacity caused by wraparound ends. The results reveal that the efficiency of reinforced models with wraparound ends in terms of occupied land area is about 100% higher than that of without wraparound ends. The research carried out as presented in this thesis demonstrates that the wraparound geosynthetic reinforcement technique can be highly beneficial in a location of limited land width for foundation construction.
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Gong, Nai-Guang. "Finite element analysis of masonry arch bridges." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335791.
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Skvorchevsky, A. Y. "ELS capacity control system for axial-piston pumps." Thesis, Національний технічний університет "Харківський політехнічний інститут", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/46920.
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Iflefel, Ibrahim Beleed. "The influence of dents and gouges on the load carrying capacity of transmission pipelines." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426118.
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Engberg, Amanda. "The effect of load carriage on aerobic capacity and ventilatory threshold in Swedish soldiers." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37125.
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Background: Working within the military as a ground combat solider is very physically demanding. Soldiers are required to handle situations ranging from peacekeeping to counterinsurgency and combat, while faced with the task of load carriage either in form of the military gear or other additional loads. Therefore, a good aerobic and anaerobic fitness is necessary. The aerobic and anaerobic fitness can be assessed with a wide range is methods such as measuring the peak oxygen uptake (VO2peak), ventilator threshold, blood lactate concentration and heart rate. However research is rather spares regarding the effects of load carriage on the aerobic capacity. Aim: The aim of the current study was to investigate if military gear affects VO2peak, ventilatory threshold, blood lactate concentration and heart rate in ground combat soldiers. Methods: A total of eight soldiers (seven men and one woman) participated in the current study. All participants completed two biological calibrations and VO2max tests (one without and one with military gear) using a modified Bruce protocol, where VO2 (L/min), absolute and relative VO2peck (L/min and ml/kg/min respectively), heart rate (beats/min) and blood lactate concentration (mM/L) were assessed. After the completion of the tests, the soldier’s individual ventilatory threshold (VT) was visually located using the V-slope method. The Wilcoxon test was used for the not normally distributed variables (blood lactate concentration and stage when VT occurred) and the paired sample t-test for the others. The significance level was set to 0.05. Results: The results showed that the soldier had 10.6 % lower absolute VO2peak and 23.7 % lower relative VO2peak while wearing military gear compared to without (p=0.002 and p=0.001 respectively). The soldiers also had 11.8 % higher VO2 at VT with military gear (p=0.003) and reached a higher percentage of the VO2peak (p=0.023) at VT. The blood lactate concentration was significantly higher when marching at 5.4 km/h and a trend of a higher blood lactate concentration while standing was observed without military gear compared to with military gear. Conclusion: The findings from the present study shows that performing load carriage in form of the military gear significantly decreased the VO2peak. Wearing a military gear also increased the VO2 at the individual VT and made the soldier reach a higher percentage of the VO2peak at VT. These results can act as guidance when recruiting and training soldiers, along with providing important information to other professions and sports that involve load carriage.
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Martin, Andersson. "The correlation between injury prevalence, training load and cardiovascular capacity in adolescent handball players." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-39536.
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Background: Today, sport specific high school educations is a common alternative for students applying for educations. The majority of the larger cities in Sweden has this option for adolescent athletes, allowing them to start their journey towards the elite in an early age. However, this option leads to higher training volume and a greater responsibility for the young athletes. If training volume is not controlled the everyday life of the athletes gets affected and the risk of injuries increases. Aim: The aim of this study was to determine if training volume, injury prevalence and type of injury differed between young female and male students attending a handball specific high school education. Furthermore, the aim was to analyse whether cardiovascular capacity and training volume have a high (r > 0.50) correlation with the injury prevalence among students attending the sport specific handball high school education. Methods: When examining training habits, injuries and cardiovascular capacity in this study, a questionnaire and the submaximal Åstrands cycle ergometer test was used. The questionnaire was a compilation of two already existing and validated questionnaire and the Åstrands test was performed according to the existing test manual to guarantee valid results. Results: The main results in this study show a significant difference in training volume between sexes, the women in the study had an increased training volume of 2 hours/week compared to men. The most common type of injury was overload injuries (68% of all injuries). However, there was no significant difference between sexes although an indication that women suffers from more acute injuries than men was seen. There was a moderate correlation (rs=0.43) between training volume and injury prevalence but no correlation when dividing the group by sex. Conclusions: The conclusion from this study is that female adolescent handball players in a handball specific high school education have both higher injury prevalence and higher training volume than age-, sports- and school matched male players. Also, for all participants in a handball specific high school education an increased training volume is likely to increase the risk of injury in the athletes. Also, there was a trend that women had a higher injury prevalence than men. Therefore, adaption in training volume should be made with care and under observation from coaches to adapt the athletes and avoid further injuries.
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Karlsrud, Kjell. "Prediction of load-displacement behaviour and capacity ofaxially loaded piles in clay based on analyses and interpretation of pile load test results." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-17071.
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The main objective of the work presented herein was to develop new semi-empirical design procedures for determination of bearing capacity and load-displacement response of axially loaded piles in clay. Hereunder also prediction of how the capacity will build up with time following the pile installation, primarily as a result of consolidation. A main basis for developing new procedures was the collection, detailed review and assessment of results from a series test programs carried out over the past 30 years on well instrumented piles. The data collected and reviewed include the pile installation, re-consolidation, and loading phases. The pile instrumentation includes measurement of the distribution of loads or shaft friction, pore pressure and earth pressure along the pile shafts. The soil conditions range from soft NC clays with undrained shear strength down to about 15 kPa, to very stiff and high OCR clays with undrained shear strength up to about 500 kPa. The plasticity index of the clays mostly lies in range 10 to 60 %. The test piles range from small scale model piles with diameter down to 36 mm and length down to 1- 2 m, to large scale piles with diameter up to 800 mm and length up 71 m. In addition to these fully instrumented pile tests, some recent large scale tests on non-instrumented piles are also reviewed and included as basis for developing the new proposed design procedures. Two new procedures for predicting ultimate shaft friction are proposed, respectively a so-called α- and β approach. They tie the local ultimate shaft friction along a pile to the “true” undisturbed in-situ undrained strength of the clay as determined from Direct Simple Shear Tests, the in-situ vertical effective stress, the overconsolidation ratio, and the plasticity index of the clay. No clear evidence is found of effects of pile diameter, length or stiffness on the local ultimate shaft friction, or whether the pile is open-or closed- ended. A moderate effect of pile length or flexibility on the total ultimate pile capacity will still come out of the proposed t-z curves, which include some postpeak reduction. A brief review and summary is also given of measured effects of cyclic loads on the axial capacity and pile head displacements of piles. It is concluded that this issue can be well accounted for by analytical or numerical procedures already in existence. A semi – empirical analytical procedure, based on linear radial consolidation theory, is proposed for predicting the time required for re-consolidation and “set-up” of the ultimate shaft friction. The main input parameters are the in-situ permeability and virgin modulus number (or virgin compression index) of the undisturbed clay. The same basic formula and correlations were found applicable to both open- and closed- ended or partially plugging piles. For design purposes it is very important to recognise that the time for full set-up can easily be a factor of 10 longer for a closed– ended pile than for an ideal nonplugging open- ended pile. It was also an objective to study how well the measured pile response during installation, re-consolidation and pile loading could be predicted from analytical and numerical models. Although such procedures can give very valuable insight, there is still a way to go before they can correctly capture all relevant elements of the pile response. The greatest need for improvement is to establish a better understanding of how the severe disturbance and strains induced by the pile installation affects the basic stress-strain, strength-, and volumetric compressibility- characteristics of the clay, depending on the level of induced shear strains as function of radial distance from the pile wall.
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Saeedi, Manooch S. "Optimal Motivation and Cognitive Load for Enhanced Math Performance." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1590.
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Educational research has a long history of investigating factors that are linked to improved academic performance. Here I examined research on three factors that impact academic performance—working memory (WM), cognitive load, and motivation. Although each of these factors were known to impact academic performance, there were no studies that examined the combined effect of these three factors on performance. The current study attempted to examine the potential connections between these factors, and their collective impact on strategies for learning in the context of math performance. Experiment 1 tested the impact of WM, cognitive load, and motivation for a math task in an online population, and Experiment 2 tested these impacts for an in-lab sample. In both samples, manipulations of cognitive load and motivation were ineffective, but significant relationships were discovered for individual differences on these constructs. Motivation and cognitive load were related, and so were cognitive load and WM. In addition, all of these variables were related to performance. Further research on the connections among these variables is needed to understand their relative impacts on math performance.
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Almograbi, Mohammed F. "Membrane action in simply supported slabs." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/591.
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Sato, Takeshi, Abbas Sandouk, Takaya Yamazato, Masaaki Katayama, and Akira Ogawa. "System Capacity of an Integrated Voice and Data CDMA Network in Channel Load Sensing Protocol." IEEE, 1997. http://hdl.handle.net/2237/7783.
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Khan, Muhammad Umair Shabbir. "Estimation of compressive load bearing capacity of helical piles using torque method and induced settlements." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59121.
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Helical piles are deep foundations that have a helix at the end. The traditional approaches to determine the load capacity such as loading tests and in situ tests (i.e. SPT, CPT and LCPC) are not economically feasible for the small scaled constructions, for which helical piles are generally recommended. In order to estimate the ultimate load that helical piles can carry, torque method is thus mostly used. Torque method does not account for the possible settlements induced at calculated loads. Settlement induced is the main load capacity governing factor for deep foundations, as they are considered failed when a settlement more than the permissible amount is attained. The possibility that the piles might fail well before the calculated load is achieved because of excessive settlements make the results of torque method dubious. This research attempts to investigate the torque method for the settlements and for its precision. For this purpose, seven RS2875.203 helical piles were installed and their ultimate compressive loads are calculated using the torque method. On seventh pile, static axial compression test was conducted. The settlements at torque method’s ultimate loads are determined from the load movement curve of compression test. Results underscore that the settlements at torque method’s ultimate and allowable loads are within the permissible amount. The load movement curve of compression test is interpreted using different failure criteria to calculate the failure load. Results show that 10% failure criterion is the most suitable criterion to interpret the load movement curve of RS2875.203 helical piles. Additionally, different bearing equations are used to compute the ultimate compressive loads of helical piles. Result suggest that the loads calculated using torque method and bearing equations correlate well with each other.Applied Science, Faculty of
Engineering, School of (Okanagan)
Graduate
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Ahmed, Mohamed Hossam. "Capacity enhancement and performance analysis of call admission and load control in wireless communication networks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ60948.pdf.
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Hung, Yu-Hsin, and 洪鈺欣. "Load Prediction and Contract Capacity Optimization Research." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/84796303164980464046.
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碩士國立臺灣大學
工程科學及海洋工程學研究所
99
In Taiwan, most industrial and commercial enterprises sign power contracts with Taiwan Power Company. Problems occur when deciding the capacity in contracts: the high power capacity leads to increase of total electronic consuming cost. However, if the power capacity is set low, consumers run the risk of high penalty when the actual consumption exceed. The aim of this thesis is to optimize power demand for Taiwanese industries through the model of forecast and optimization. This thesis presents a new combination method by using particle swarm optimization (PSO) to forecast the load capacity, and control uncertainty of forecasting with stochastic simulation. Then optimize the capacity of contract with the improved particle swarm optimization by query based learning (QBLPSO) [1] algorithm. There are two main purposes in this thesis. First, the proposed method will be compared with the other methods, and we analyze separately the forecast and optimization. Second, we make decision analysis framework for determining the optimal power contract capacity and an empirical study in real cases, which included the industry, the commerce. The load forecast has about 90% of accuracy in government units, 92% of accuracy in commerce, 90% of accuracy in manufacturing industry, and 85% of accuracy in service industry. And optimization model help user to save about $195,374 in government units, $4,031 in commerce, $30,978 in manufacturing industry, and $39,905 in service industry. Therefore, the result of experiment explain that this proposed method can help user efficiently to make appropriate contract capacity.
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Moutinho, Mário Ricardo Costa. "Load carrying capacity of polymer-metal hybrid gears." Master's thesis, 2020. https://hdl.handle.net/10216/128286.
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Moutinho, Mário Ricardo Costa. "Load carrying capacity of polymer-metal hybrid gears." Dissertação, 2020. https://hdl.handle.net/10216/128286.
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Yang, Keun-Hyeok, and Ashraf F. Ashour. "Load capacity of reinforced concrete continuous deep beams." 2008. http://hdl.handle.net/10454/6245.
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Most codes of practice, such as EC2 and ACI 318-05, recommend the use of strut-and-tie models for the design of reinforced concrete deep beams. However, studies on the validity of the strut-and-tie models for continuous deep beams are rare. This paper evaluates the strut-and-tie model specified by ACI 318-05 and mechanism analysis of the plasticity theory in predicting the load capacity of 75 reinforced concrete continuous deep beams tested in the literature. The influence of such main parameters as compressive strength of concrete, shear span-to-overall depth ratio, main longitudinal bottom reinforcement, and shear reinforcement on the load capacity is also investigated using both methods and experimental results. Experimental results were closer to the predictions obtained from the mechanism analysis than the strut-and-tie model. The strut-and-tie model highly overestimated the load capacity of continuous deep beams without shear reinforcement.
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Tsai, Wei-Lung, and 蔡慰龍. "The Effect of Unsymmetric Loads and Sidesway on Load-Carrying Capacity of Steel Scaffolds." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/10292760982975779673.
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碩士國立中興大學
土木工程研究所
83
This research mainly focuses on the effect of unsymmetrical loads acting on the steel scaffolds and the effect of initial sidesway of steel scaffolds for high- clearance reinforced concrete structures. The research work includes two parts, namely experimental and theoretical parts. Studies three-story steel scaffolds were adopted in experimental in which the effects of unsymmetrically applied loads and the initial sidesway of the steel scaffold system were investigated in these tests. The commercial code NASTRAN providing both eigenvalue and second-order elastic analyses are used in the theoretical approach. It was found that the load-carrying capacity of tubes of the scaffold will control the failure of the entire system, even if the system has unsymmetrically applied loads and initial sidesway on steel scaffolds. The use of the traditional jack base and the stiffened jack base can increase the loading capacity of system up to 17% - 33% and about 59% respectively in comparison with that of steel scaffold system without jack bases.
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Wang, Li-Chun Tommy. "Dynamic robot motions and dynamic load carrying capacity computation." 1986. http://catalog.hathitrust.org/api/volumes/oclc/15051701.html.
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