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Dissertations / Theses on the topic 'Concrete Ties'

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Published: 4 June 2021
Last updated: 28 July 2025

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1

Albahttiti, Mohammed T. "Freeze-thaw performance of prestressed concrete railroad ties." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/20376.

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Doctor of Philosophy<br>Civil Engineering<br>Kyle Riding<br>Air voids are purposefully entrained in concrete to provide freeze-thaw durability of prestressed concrete railroad ties. Durability assurance requires consistent provision of an air void system comprised of small, well-distributed bubbles in sufficient quantity for durability and a quality control method for testing tie freeze-thaw durability. Manufacturing processes at three concrete manufacturing plants were investigated in order to determine the effects of process variability on resulting concrete air void system variability. Vari
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2

Muller, John Francis. "Serviceability of prestressed concrete railway sleepers." Thesis, Queensland University of Technology, 1985. https://eprints.qut.edu.au/36475/1/36475_Muller_1985.pdf.

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In 1984, prestressed concrete members of a left hand, trial 1 in 16 concrete sleepered turnout were subjected to strain gauge measurements under coal traffic in Central Queensland. However, the results were inadequate to permit finalisation of standards for sleepers generally. Consequently, strain gauges were installed across the entire rail seat cross-sections of eight standard sleepers in 1985 to ascertain the effects of artificially produced rail defects on prestressed concrete sleeper performance under coal traffic conditions. This operation was carried out in 1985 and the results
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3

Igwemezie, Jude O. "Dynamic response and impact effects in precast, prestressed concrete bridge ties." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74056.

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4

Morin, Craig R. (Craig Robert). "The application of composite laminates in strengthening concrete cross ties." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10736.

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5

LU, LIHENG. "Experimental Study of Reinforced Concrete Ties under Load and Corrosion." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2497132.

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Corrosion of reinforcing bars embedded in concrete is a worldwide problem that affects numerous reinforced concrete (RC) structures, which generates expansive products and decreases the cross section of the bars, compromising the safety of the structure. In Italy, the national highway network comprises a large number of reinforced concrete bridges whose service life exceeded 40 years. The cost of maintenance and replacement for these highway bridges due to corrosion damage is measured in billions of euros. In this study, the major aim is the experimental research on two sets of reinforced conc
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6

Murphy, Robert Lawrence. "Determining the transfer length in prestressed concrete railroad ties produced in the United States." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13743.

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Master of Science<br>Department of Civil Engineering<br>Robert J. Peterman<br>This thesis presents results from transfer length measurements on prestressed concrete railroad ties. Results are shown from the four main producers of concrete ties in the United States. Six prestressed concrete tie plants were visited by the research team to measure transfer length on ties with various mix designs and prestressing reinforcement. After all plants had been visited, a total of nine concrete-mix designs and 10 reinforcement variations were tested. Overall, 220 transfer length measurements were conducte
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7

Momeni, Amir Farid. "Effect of concrete properties and prestressing steel indentation types on the development length and flexural capacity of pretensioned concrete members." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32682.

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Doctor of Philosophy<br>Civil Engineering<br>Robert J. Peterman<br>A study was conducted to determine the effect of different concrete properties and prestressing steel indentation types on development length and flexural capacity of pretensioned members. Wires and strands commonly used in the manufacturing of prestressed concrete railroad ties worldwide were selected for the study. Thirteen different 5.32-mm-diameter prestressing wire types and six different strands (four, seven-wire strands and two, three-wire strands) were used to cast prisms with a square cross section. The ratio of concre
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8

Camacho, Torregrosa Esteban Efraím. "Dosage optimization and bolted connections for UHPFRC ties." Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/34790.

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Concrete technology has been in changeful evolution since the Roman Empire time. It is remarkable that the technological progress became of higher magnitude from the second part of the XX Century. Advances in the development of new cements, the appearance of the fibers as a reinforcement for structural applications, and specially the grand progress in the field of the water reducing admixtures enabled the emergence of several types of special concretes. One of the lasts is the Ultra High Performance Fiber Reinforced Concrete (UHPFRC), which incorporates advances of the Self-Compactin
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9

Haynes, Mark Davis. "Quality by design: improving pre-stressed reinforcement for concrete railroad ties via geometrical dimensioning and tolerancing." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/20582.

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Doctor of Philosophy<br>Department of Industrial & Manufacturing Systems Engineering<br>Chih-Hang John Wu<br>Quality is a result of product design and production control. Product design must maximize the ability to function across variations in production and environment. Production control must monitor and maintain the key design characteristics necessary for the intended function. Failure to do so results in premature part failure and increased costs. This has occurred in the production of modern cross ties. By designing quality into the product and production process, performance is ma
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10

Arnold, Matthew Lukas. "Un-tensioned pullout tests to predict the bond quality of different prestressing reinforcements used in concrete railroad ties." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/15625.

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Master of Science<br>Department of Civil Engineering<br>Robert J. Peterman<br>An experimental testing program was conducted at Kansas State University (KSU) to test the bond characteristics of various 5.32-mm-diameter steel wires and smaller diameter (less than 0.5 in.) strands used in prestressed concrete railroad ties. A total of 13 wires and six strands produced by seven different steel manufacturers were used during this testing. Since no wire bond pullout test currently exists, one was developed and its validity tested. This un-tensioned pullout test could serve as a quality control test
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11

Marziale, Stephen. "Analysis of Brick Veneer on Concrete Masonry Wall Subjected to In-plane Loads." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1407153177.

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12

Silva, Caio Cezar Catiste. "Contribuição ao projeto de dentes de concreto para ligações em estruturas de concreto pré-moldado." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-01122017-121643/.

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A presente pesquisa apresenta um estudo comparativo a respeito dos procedimentos para o projeto de dentes de concreto. O dente de concreto é um elemento estrutural bastante utilizado em ligações de estruturas de concreto pré-moldado. Atualmente existem vários procedimentos para o dimensionamento ou estimativa da capacidade resistente dessa ligação, entre os quais destacam-se o da ABNT (NBR 9062 e NBR 6118), PCI, ACI 318-14, Eurocode 2, entre outros. Neste contexto, a presente pesquisa objetiva à análise comparativa desses procedimentos de projeto com resultados experimentais disponíveis. Assim
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13

Oliveira, Diôgo Silva de. "Reforço de pilares de concreto armado de seção transversal retangular mobilizando efeitos de confinamento." Universidade Federal de Viçosa, 2017. http://www.locus.ufv.br/handle/123456789/19523.

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Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2018-05-14T18:03:53Z No. of bitstreams: 1 texto completo.pdf: 17243301 bytes, checksum: d06340e5873da7e2b07d927bb4b6ca6d (MD5)<br>Approved for entry into archive by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2018-05-14T18:04:11Z (GMT) No. of bitstreams: 1 texto completo.pdf: 17243301 bytes, checksum: d06340e5873da7e2b07d927bb4b6ca6d (MD5)<br>Approved for entry into archive by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2018-05-14T18:04:23Z (GMT) No. of bitstreams: 1 texto completo.pdf: 17243
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Bugaldian, Adel Abdulmoula. "Concrete columns confined with scrap tires." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0022/MQ52289.pdf.

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15

França, Valério Henrique [UNESP]. "Aderência aço-concreto: uma análise do comportamento do concreto fabricado com resíduos de borracha." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/91477.

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Made available in DSpace on 2014-06-11T19:25:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-08-10Bitstream added on 2014-06-13T20:53:09Z : No. of bitstreams: 1 franca_vh_me_ilha.pdf: 3046692 bytes, checksum: e6bee58e13b985073849417fdadcea71 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Araca Renovadora de Pneus<br>Cesp<br>Holcim do Brasil S.A<br>O bom comportamento das estruturas de concreto armado é assegurado pelo fenômeno da aderência existente entre o aço e o concreto, garantindo que os materiais trabalhem em conjunto formando, assim, um conju
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16

Santos, Daniel dos. "Análise de vigas de concreto armado utilizando modelos de bielas e tirantes." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-22062006-102606/.

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O modelo de bielas e tirantes apresenta como uma de suas vantagens a generalidade, ou seja, é capaz de representar, de modo aproximado, porém realista e sistemático, grande parte dos elementos de concreto estrutural da atualidade. Além disso, permite ao engenheiro fácil visualização físico-intuitiva do comportamento do concreto estrutural. Por outro lado, o modelo ainda tem um enorme potencial não aproveitado. Ainda não se tem um critério exato para determinação dos nós e das seções transversais das bielas de alguns elementos. Apesar de haver certas incertezas no caso de vigas-parede e princip
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17

Nicholas, Thomas. "Evaluation of strut-and-tie modeling for bridge pier applications." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2705.

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Thesis (M.S.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains xi, 122 p. : ill., map. Includes abstract. Includes bibliographical references (p. 114-116).
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18

Bastos, Paulo Sérgio dos Santos. "Análise experimental de dormentes de concreto protendido reforçados com fibras de aço." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-17022005-165347/.

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Este trabalho descreve um dormente monobloco de concreto protendido, o qual foi projetado para atender as características de uma via ferroviária brasileira. O dormente apresentou comportamento e resistência semelhantes aos dormentes de concreto comumente fabricados em vários países. A fim de verificar e aprovar o projeto, o dormente foi submetido a ensaios estáticos e dinâmicos, segundo as especificações da norma americana AREMA. Verificado e aprovado o projeto, dezoito dormentes foram fabricados sem e com fibras de aço, no teor de 60 kg/'M POT.3' (aproximadamente 0,75 % por volume). Ensaios e
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19

Carvalho, Matheus Lopes de. "Análise de confiabilidade de modelos de capacidade resistente de blocos de fundação." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-05032018-142919/.

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O projeto estrutural deve considerar as incertezas provenientes das variáveis envolvidas no dimensionamento dos elementos estruturais, tais como propriedades dos materiais, dimensões dos elementos estruturais e intensidade dos carregamentos atuantes. Existe também a variabilidade inerente aos métodos de análise estrutural, originária de imprecisões na idealização da distribuição das tensões e deformações dos elementos estruturais. Sendo assim, esta dissertação visa analisar a variabilidade dos desvios dos modelos de cálculo propostos por Blevot e Frémy (1967), Fusco (1994) e Santos (2013), tod
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20

Munhoz, Fabiana Stripari. "Análise do comportamento de blocos de concreto armado sobre estacas submetidos à ação de força centrada." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-12072006-103303/.

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Este trabalho estuda o comportamento de blocos rígidos de concreto armado sobre uma, duas, três, quatro e cinco estacas, submetidos à ação de força centrada. Com o objetivo de contribuir para critérios de projeto, utilizaram-se resultados obtidos por meio de modelos analíticos e realizou-se análise numérica utilizando-se programa baseado no método dos elementos finitos. Foi desenvolvida, ainda, uma análise comparativa entre os processos de dimensionamento adotados em projeto, na qual se verificou grande variabilidade dos resultados. Para análise numérica adotou-se comportamento do material com
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21

Cunningham, Lee Scott. "Automatic design of concrete structures using a strut & tie approach." Thesis, University of Glasgow, 2000. http://theses.gla.ac.uk/1726/.

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The major part of the work presented in this thesis is an investigation of the strut and tie method for designing 2-D in-plane, reinforced concrete structures. Two important issues relating to this method are addressed. Firstly, the issue of visualising an appropriate strut and tie model is dealt with. In many situations it may be difficult to visualise an appropriate model for a given structural system. Here, a convenient method of visualising strut and tie models is presented. Using elastic finite element analysis, low stressed parts of a structure are removed in a step by step process until
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22

Quevedo, Valéria Ramos Baltazar. "Estudo de composição para concreto extrudável para pré fabricados." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/999.

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Capes<br>Bem estabelecido e amplamente utilizado nas indústrias de polímeros e cerâmicas, o processo de extrusão vem sendo também explorado pela indústria de concreto. Embora a indústria de pré fabricados estruturais de concreto utilize superplastificantes, ainda não existem ensaios específicos para caracterizar o comportamento no estado fresco de concretos utilizados para extrusão. Foi observado que, mesmo em empresas de grande porte, a avaliação consiste no ensaio de abatimento em tronco de cone e na experiência intuitiva de um funcionário ao manipular o concreto com uma pá manual. No entant
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23

Santos, Andreilton de Paula. "Análise estrutural de galpões atirantados de concreto pré-moldado." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-28072010-094002/.

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Os galpões de concreto pré-moldado, formados por pórticos atirantados, são muito utilizados, no Brasil. Porém, para o projeto dessas estruturas, a bibliografia é limitada. Além disso, vários critérios de projeto são adaptados dos relativos a estruturas de concreto moldado no local e de múltiplos pavimentos. O objetivo deste trabalho é contribuir para a análise desse tipo de estrutura, introduzindo conceitos que dificilmente são considerados na prática, tais como: rigidez da ligação viga-pilar, análise não-linear física e geométrica, deformação excessiva e fluência. A pesquisa foi desenvolvida
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França, Valério Henrique. "Aderência aço-concreto: uma análise do comportamento do concreto fabricado com resíduos de borracha /." Ilha Solteira : [s.n.], 2004. http://hdl.handle.net/11449/91477.

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Resumo: O bom comportamento das estruturas de concreto armado é assegurado pelo fenômeno da aderência existente entre o aço e o concreto, garantindo que os materiais trabalhem em conjunto formando, assim, um conjunto solidário. Esse trabalho apresenta os resultados dos ensaios de tração direta, segundo a ABNT/NBR 7477 e de arrancamento normalizado pela CEB RC6 e referido também na ASTM C-234, realizados com concreto convencional e com concreto contendo 10% de resíduo de borracha em substituição a areia, em volume, nas idades de 28 e 90 dias. As barras de aço utilizadas neste trabalho foram do
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25

Miratashi, Yazdi Seyed Mansoor. "Robustness of steel framed buildings with pre-cast concrete floor slabs." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/robustness-of-steel-framed-buildings-with-precast-concrete-floor-slabs(7004a673-cf6c-4d22-a00e-34c6be6bb6a0).html.

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Following some incidents in high-rise buildings, such as Ronan Point London 1968, in which collapse of a limited number of structural elements progressed to a failure disproportionate to the initial cause, consideration of robustness was introduced in British Standard. The main method of preventing progressive collapse for providing robustness to steel framed buildings with precast concrete floor slabs focuses on the allowable tying forces that the reinforcement in between the slabs and in hollowcores should carry. However there are uncertainties about the basis of the practical rules associat
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Reys, De Otiz Iclea. "Strut-and-tie modelling of reinforced concrete : short beams and beam-column joints." Thesis, University of Westminster, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334612.

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Khatab, Mahmoud A. T. "Behaviour of continuously supported self-compacting concrete deep beams." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14628.

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The present research is conducted to investigate the structural behaviour of continuously supported deep beams made with SCC. A series of tests on eight reinforced two-span continuous deep beams made with SCC was performed. The main parameters investigated were the shear span-to-depth ratio, the amount and configuration of web reinforcement and the main longitudinal reinforcement ratio. All beams failed due to a major diagonal crack formed between the applied mid-span load and the intermediate support separating the beam into two blocks: the first one rotated around the end support leaving the
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Buxton, Jeffrey Ryan. "Strut-and-Tie Modeling of Multistory, Partially-Grouted, Concrete Masonry Shear Walls with Openings." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6292.

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Construction practices are constantly evolving in order to adapt to physical locations and economic conditions. These adaptations may result in more cost-effective designs, but may also come at a cost of strength. In masonry shear walls, it is becoming more common to reduce the amount of grouting from every cell to only those with reinforcement, a practice known as partial-grouting. Partially-grouted masonry responds differently and in a more complex matter to lateral loads as compared to fully-grouted masonry. The response is made even more complex by wall discontinuities in the form of openi
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Tanno, Danieli Colombo dos Santos. "Blocos de concreto sobre estacas posicionados nas divisas de terrenos: estudo analítico e análise numérica linear." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-03072012-101640/.

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Este trabalho estuda o comportamento estrutural de blocos sobre estacas em concreto armado situados em divisas de terrenos. Foi feita revisão bibliográfica abordando os assuntos de blocos de coroamento, vigas de equilíbrio, modelo de bielas e tirantes e um breve comentário sobre o programa computacional Diana (2010). O trabalho apresenta um roteiro para análise estrutural e dimensionamento de vigas de equilíbrio sobre estacas com pilar excêntrico ao apoio. É apresentado um exemplo feito por Andrade (1989), comparado com o método proposto por Burke (1979) e com análise numérica. Além deste, for
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Munhoz, Fabiana Stripari. "Análise experimental e numérica de blocos rígidos sobre duas estacas com pilares de seções quadradas e retangulares e diferentes taxas de armadura." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-30102014-084828/.

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Esta pesquisa realiza a análise do comportamento estrutural de blocos rígidos de concreto armado sobre duas estacas submetidos à ação de força vertical centrada, com pilares de seções quadradas e retangulares e diferentes taxas de armaduras de pilares. Nestes elementos utilizam-se o método das Bielas e Tirantes para o projeto estrutural, mas normalmente não se considera a influência da seção geométrica dos pilares e suas taxas de armadura no projeto do bloco. Apresenta-se um estudo experimental de doze modelos de blocos sobre duas estacas, na escala 1:2. Foi desenvolvida uma análise numérica t
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Post, Anthony William. "Thermal and fatigue testing of fiber reinforced polymer tie connectors used in concrete sandwich walls." [Ames, Iowa : Iowa State University], 2006.

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Angar, Mohammad Mustafa. "Reinforcement Layout in Concrete Pile Foundations : A study based on non - linear finite element analysis." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278214.

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The main topic of this thesis concerns the behavior of concrete pile cap supported by four piles with two varying positions of longitudinal reinforcements. The positions include top of piles and bottom of the pile cap. For this purpose, non-linear finite element models of a pile cap are created using software ATENA 3D. The goal was to observe which position of reinforcement yields the higher bearing capacity and to observe the failure modes in the models. To achieve the above goals, a short review of theoretical background concerning shear phenomena is performed. This, in order to enhance the
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Bahen, Neil P. "Strut-and-tie modeling for disturbed regions in structural concrete members with emphasis on deep beams." abstract and full text PDF (free order & download UNR users only), 2007. 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:1447626.

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Mboa, Omer. "La Problématique des technologies appropriées au développement des pays du tiers-monde cas concret du Cameroun." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375995478.

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Shalookh, Othman H. Zinkaah. "Behaviour of continuous concrete deep beams reinforced with GFRP bars." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18381.

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Sato, Henrique Towata. "Dimensionamento de regiões D através do método dos elementos finitos e do método de bielas e tirantes aliado à otimização topológica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-16112015-115450/.

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O dimensionamento de Regiões D (regiões em que não é aplicável a Hipótese de Bernoulli), embora amplamente estudado e discutido, é um tópico ainda em desenvolvimento e com normatização relativamente escassa. Os métodos mais comumente empregados são o Método dos Elementos Finitos (MEF) e o Método de Bielas e Tirantes (MBT). A dissertação expõe a base teórica e a metodologia dos dois métodos no dimensionamento de estruturas de concreto armado ao Estado Limite Último e aborda a utilização da otimização, em especial da otimização topológica, na definição dos modelos para o MBT. Metodologias para a
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Oliveira, Diôgo Silva de. "Análise do comportamento estrutural de blocos de concreto armado sobre cinco e seis estacas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-08042013-105751/.

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Esta pesquisa discorre a respeito do comportamento estrutural de blocos de concreto armado sobre cinco estacas, dispostas nos vértices de um trapézio, e sobre seis estacas, com o arranjo retangular, considerado pilar com força centrada. Foram estudados diversos métodos analíticos para o dimensionamento dos blocos, no intuito de avaliar a compatibilidade entre o comportamento dos blocos e as hipóteses de cada método. Foi desenvolvida análise numérica tridimensional utilizando programa baseado no método dos elementos finitos. Nos blocos estudados variou-se a deformabilidade do solo de apoio das
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Lima, Carlos Roberto Bergamo de. "Revestimentos hidráulicos - entre arte e tecnologia: passado, presente e novas possibilidades." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/102/102131/tde-08032016-101916/.

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Esta pesquisa estuda a evolução histórica, estética e tecnológica ocorrida na produção de revestimentos de pisos e paredes, tendo o ladrilho hidráulico como referência principal, com o objetivo de apresentar aos artistas e artesãos as novas tecnologias de produção de CAD (concretos de alto desempenho) e endurecedores químicos de superfície para a produção de murais e pisos adequados a estética contemporânea Para a utilização coerente deste material na produção artística contemporânea é necessário compreender que a sua técnica produtiva e estética peculiar são resultados de conflitos históricos
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SAKAI, Erika. "Análise de blocos de concreto armado sobre estacas." Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/1340.

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Made available in DSpace on 2014-07-29T15:18:23Z (GMT). No. of bitstreams: 1 ErikaSakai.pdf: 1917728 bytes, checksum: 5cc92bff51598c6d8147b5abba80383d (MD5) Previous issue date: 2010-12-16<br>Through studies on the choice of type of foundation to use a certain work, always when the foundation is to pile it is necessary to build another structural element, the block of crowing or also called pile caps. Several studies have been made taking into account the block on stilts without the influence of soil. So this work demonstrates the relationship of methods of calculation of reactions in piles
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ALJhayyish, Anwer K. "Optimizing Slab Thickness and Joint Spacing for Long-Life Concrete Pavement in Ohio." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1550099928352708.

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Öberg, Löfstrand Leonard, and Fredrik Lagerstam. "Optimering av stämprivningstider : - En kvantitativ undersökning om stämprivningstider avbostadsbjälklag." Thesis, KTH, Byggteknik och design, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233769.

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Vid gjutning av bostadsbjälklag är formbyggnad och stämprivning ett viktigt moment. Inombyggbranschen råder vissa tveksamheter angående när och hur stämpen skall rivas. Instruktioner förhur det skall gå till finns att tillgå men de är ofta svårtolkade och i viss mån utdaterade. Det leder tillatt de i många fall inte följs. Hjälpmedel som mätinstrument och simuleringsprogram för detta finnsmen används sparsamt. För att undvika olyckor och säkerställa att betongens hållfasthet är tillräckligutan hjälpmedel används överdrivna tidsmarginaler och detta leder sannolikt till att stämp blirståendes lä
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Mohamed, Khaled Ahmed. "Performance and strut efficiency factor of concrete deep beams reinforced with GFRP bars." Thèse, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/7613.

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Abstract : Deep reinforced concrete beams are commonly used as transfer girders or bridge bents, at which its safety is often crucial for the stability of the whole structure. Such elements are exposed to the aggressive environment in northern climates causing steel-corrosion problems due to the excessive use of de-icing salts. Fiber-reinforced polymers (FRP) emerged as non-corroded reinforcing materials to overcome such problems in RC elements. The present study aims to address the applicability of concrete deep beams totally reinforced with FRP bars. Ten full-scale deep beams with dimensions
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Silva, Fabiana Maria da 1987. "Análise da aplicação de resíduo de borracha de pneus em piso tátil intertravado de concreto." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267711.

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Orientador: Luísa Andréia Gachet Barbosa<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia<br>Made available in DSpace on 2018-08-26T12:45:29Z (GMT). No. of bitstreams: 1 Silva_FabianaMariada_M.pdf: 2221147 bytes, checksum: acb168d3d261f81f3d6f6d1d25e50816 (MD5) Previous issue date: 2014<br>Resumo: O reaproveitamento de resíduos na construção civil tem sido uma alternativa viável para diminuir o consumo de materiais naturais e a disposição inadequada dos resíduos no meio ambiente. Neste trabalho avaliou-se o reaproveitamento de resíduo de borracha de pneu
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Gutierrez, Jimenez Miguel Angel, and Valenzuela Manuel Edgard Vizarreta. "Incremento del módulo de rotura por flexo tracción de losas de concreto hidraúlico empleando fibras de acero provenientes de neumáticos reciclados para uso como losas en pavimento." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/656618.

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El objetivo de esta investigación es proponer recuperar y usar el acero que es parte de un neumático, el cual se encuentra en desuso, como una alternativa para poder incrementar la resistencia de la losa de concreto frente a los esfuerzos de flexo tracción, y así poder mitigar la formación de grietas producto de la acción de cargas externas, específicamente en el diseño y construcción de pavimentos. Con esta finalidad, se procedió a realizar un estudio del comportamiento mecánico del concreto reforzado con fibras de acero, las que fueron obtenidas previamente del reciclado de neumáticos usa
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45

Schladitz, Frank, and Manfred Curbach. "Textilbewehrter Beton als Torsionsverstärkung." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244048995744-78708.

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Anhand von Versuchsergebnissen wird gezeigt, dass Stahlbetonbauteile mit textilbewehrtem Beton verstärkt werden können. Sowohl die Torsionstragfähigkeit als auch die Gebrauchstauglichkeit werden durch die textilbewehrte Verstärkungsschicht deutlich verbessert. Vergleichsrechnungen zeigen, dass die Torsionstragfähigkeit mit bereits bekannten Stabwerksmodellen ermittelt werden kann.
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46

Mang, Chetra. "Prise en compte de la liaison acier-béton pour le calcul des structures industrielles." Thesis, Paris 10, 2015. http://www.theses.fr/2015PA100183/document.

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Le comportement des structures en béton armé peut s’avérer extrêmement complexe en cas de dépassement de la limite de fissuration du béton. Le caractère composite du béton armé doit être représenté finement. Pour la simulation des structures industrielles, les modèles numériques employés supposent une relation parfaite entre le béton et les armatures qui non seulement ne prennent pas en compte la complexité de la relation entre les deux matériaux mais aussi ne permet pas de présenter finement les caractéristiques de la fissuration étant directement liée à celle des aciers. Dans la littérature,
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Wang, Nianzhi. "Resistance of concrete railroad ties to impact loading." Thesis, 1996. http://hdl.handle.net/2429/6177.

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In some sections of railroad, many prestressed concrete railway ties were found to be cracked after being in service for only a few months, because of impact loading. The dynamic properties of concrete ties were thus studied in this work. Two typical types of impulse encountered in track, due to rail abnormalities and "wheel flats" of trains, were successfully simulated by the use of a 578 kg impact machine and a 60 kg drop weight impact machine, respectively. The previously developed "single-blow" impact technique has been extended into a "multi-blow" impact technique, in order to bette
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Peters, Nigel William. "Optimization of prestressed concrete bridge ties for open deck railway bridges." Thesis, 1992. http://spectrum.library.concordia.ca/3843/1/MM73613.pdf.

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Kahagala, Hewage Dayani. "Dynamic behaviour of macro synthetic fibre reinforced concrete railway sleepers." Thesis, 2022. http://hdl.handle.net/1959.7/uws:68910.

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The conventional prestressed concrete sleepers are the most popular in the current railway market owing to their higher stiffness and dynamic stability. Yet, these sleepers are susceptible to severe cracking, creating premature failures. Recently, fibre-reinforced concrete has been proven effective in arresting cracks with added advantages of enhanced mechanical strength, ductility and associated durability. Of the two feasible and economical fibre types, steel and macro synthetic, the latter is sought in sleeper applications because of its’ higher corrosion and electrical resistivity. Caterin
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Hsu, Yu-lin, and 許瑜麟. "The Effectiveness of Combined Ties on the Confinement of Encased Concrete-Filled Steel Box Columns." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/dm3s3d.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>105<br>Previous short column tests show that the so-called combined tie is able to provide noticeable confinement to the outskirt concrete. in this study, encased concrete-filled steel box column specimens are tested under prescribed cyclic loading to investigate the effectiveness of the combined tie on the ductility of the encased concrete-filled box columns. Width-to-thickness ratio is the main parameter in this study, base on the test results, the ratio is proposed to be smaller than 37: 　　Elastic analysis results shows that: (1) In the elastic region, the stiffne
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