Rozprawy doktorskie na temat „Concrete beams”
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Lam, Wai-yin. "Plate-reinforced composite coupling beams experimental and numerical studies /". Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37311797.
Pełny tekst źródłaSvecová, Dagmar. "Behaviour of concrete beams reinforced withFRP prestressed concrete prisms". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/NQ42809.pdf.
Pełny tekst źródłaKamat, Anuja Ganesh. "Split Concrete Model for Shear Behavior of Concrete Beams". Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/193611.
Pełny tekst źródłaGurbuz, Mustafa Ispir Barnes Robert W. "Shear strengths of end regions of prestressed self-consolidating concrete beams". Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Civil_Engineering/Thesis/Gurbuz_Mustafa_18.pdf.
Pełny tekst źródłaLevy, Kelly Rebecca. "Bond behavior of prestressed reinforcement in beams constructed with self-consolidating concrete". Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Theses/LEVY_KELLY_6.pdf.
Pełny tekst źródłaBaczkowski, Bartlomiej Jan. "Steel fibre reinforced concrete coupling beams /". View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20BACZKO.
Pełny tekst źródłaChang, Peter. "Fracture characteristics of reinforced concrete beams". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65925.
Pełny tekst źródłaGhavam-Shahidy, Hamid. "Lightweight aggregate reinforced concrete deep beams". Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503556.
Pełny tekst źródłaChana, Palvinder Singh. "Shear failure of reinforced concrete beams". Thesis, University College London (University of London), 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282869.
Pełny tekst źródłaWang, Zhongsheng. "VIbration behaviour of prestressed concrete beams". Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420369.
Pełny tekst źródłaFang, Libin. "Shear enhancement in reinforced concrete beams". Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25113.
Pełny tekst źródłaGreen, Jeremy Robert, i Jeremy Robert Green. "Behaviour of reinforced concrete deep beams". Master's thesis, University of Cape Town, 1985. http://hdl.handle.net/11427/23219.
Pełny tekst źródłaSvecova, Dagmar Carleton University Dissertation Engineering Civil and Environmental. "Behaviour of concrete beams reinforced with FRP prestressed concrete prisms". Ottawa, 1998.
Znajdź pełny tekst źródłaPan, Jinlong. "Crack-induced debonding failure in fiber reinforced plastics (FRP) strengthened concrete beams : experimental and theoretical analysis /". View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202005%20PAN.
Pełny tekst źródłaAhmed, Ahmed Kamal El-Sayed. "Concrete contribution to the shear resistance of FRP-reinforced concrete beams". Thèse, [S.l. : s.n.], 2006. http://savoirs.usherbrooke.ca/handle/11143/1784.
Pełny tekst źródła趙作周 i Zuozhou Zhao. "Nonlinear behaviour of reinforced concrete coupling beams". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31243927.
Pełny tekst źródłaZhao, Zuozhou. "Nonlinear behaviour of reinforced concrete coupling beams /". Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23589395.
Pełny tekst źródłaLee, Hon. "Fatigue behavior of concrete beams prestressed with glass fiber reinforced plastic (GFRP) tendon /". View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20LEE.
Pełny tekst źródłaYapa, Hiran Deshantha. "Optimum shear strengthening of reinforced concrete beams". Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/265518.
Pełny tekst źródłaFazio, Robert. "Flexural behaviour of corroded reinforced concrete beams". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29592.pdf.
Pełny tekst źródłaBall, Ryan. "Experimental analysis of composite reinforced concrete beams". Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1177002341.
Pełny tekst źródłaSokolov, Aleksandr. "Tension stiffening model for reinforced concrete beams". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100803_110628-45999.
Pełny tekst źródłaGelžbetonis yra kompozitinė medžiaga, kurios komponentai yra betonas ir plieninė armatūra. Kaip žinoma, betono stipris tempiant yra 10-20 kartų mažesnis nei stipris gniuždant. Atrodytų, kad tempiamojo betono įtaka, atlaikant įrąžas skerspjūvyje, yra nereikšminga. Iš tiesų, nustatant lenkiamųjų elementų stiprumą normaliniame pjūvyje, tempiamo betono įtempių galima nevertinti. Kita vertus, skaičiuojant įlinkius, neįvertinus tempiamojo betono įtakos, gali būti daroma didesnė nei 100 % paklaida. Adekvatus supleišėjusio tempiamojo betono įtakos įvertinimas, nustatant trumpalaike apkrova veikiamų gelžbetoninių elementų deformacijas, yra bene svarbiausia ir sudėtingiausia problema. Plyšio vietoje betonas negali atlaikyti tempimo įtempių, todėl visą įrąžą atlaiko armatūra. Kadangi plyšyje ir gretimuose pjūviuose armatūra praslysta betono atžvilgiu, kontakto zonoje atsiranda tangentiniai įtempiai. Šie įtempiai perduodami betonui, todėl jis atlaiko tempimo įtempius. Armatūros ir betono sąveika ruožuose tarp plyšių standina gelžbetoninį elementą. Supleišėjusio betono gebėjimas atlaikyti tempimo įtempius vadinama tempimo sustandėjimu (angl. tension stiffening). Šis efektas dažniausiai modeliuojamas supleišėjusio betono įtempių ir deformacijų diagrama, taikant vidutinių plyšių koncepciją. Tuomet neatsižvelgiama į diskrečius plyšius, o supleišėjęs betonas traktuojamas kaip ortotropinė medžiaga su pakitusiomis savybėmis. Dauguma tempimo sustandėjimo modelių įvertina betono įtempių... [toliau žr. visą tekstą]
Fazio, Robert 1970. "Flexural behaviour of corroded reinforced concrete beams". Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27219.
Pełny tekst źródłaFourteen simply supported concrete beams were cast and subjected to two third point concentrated loads, increased monotonically until failure. The strength, strain and crack development data were recorded to assess the corrosion rate and its effect on the steel bars.
An electrochemical system was used to achieve the different corrosion levels. The specimens were immersed in a 5 percent of sodium chloride by weight of water for a period of one to thirty weeks. An initial voltage of 1 volt was impressed through the beams to initiate and to accelerate the corrosion process. A steel plate was immersed in the solution to act as a cathode and force the steel reinforced concrete beam to act as an anode.
The report discusses the defects and environmental factors influencing the corrosion process. (Abstract shortened by UMI.)
羅文惠 i Man-wai Law. "Strain energy capacity of reinforced concrete beams". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31207704.
Pełny tekst źródłaTan, Chuan Ming. "Nonlinear vibrations of cracked reinforced concrete beams". Thesis, University of Nottingham, 2003. http://eprints.nottingham.ac.uk/28976/.
Pełny tekst źródłaYang, Zhenjun. "Discrete crack modelling of plated concrete beams". Thesis, University of Wolverhampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247276.
Pełny tekst źródłaChan, Andrew Kay Ching. "Impact behaviour of model prestressed concrete beams". Thesis, University of Sheffield, 1986. http://etheses.whiterose.ac.uk/3484/.
Pełny tekst źródłaHoumsi, Ahmed. "Shear strength of reinforced concrete haunched beams". Thesis, University of Strathclyde, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241959.
Pełny tekst źródłaIUNES, YVELYNE BIANCA FERREIRA. "OPTIMUM TENDON PROFILES IN PRESTRESSED CONCRETE BEAMS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1402@1.
Pełny tekst źródłaUNIVERSIDADE FEDERAL DO PARÁ
O presente trabalho contém a formulação, implementação e teste de um modelo para determinação do traçado ótimo de cabos de protensão, bem como do valor da força de protensão mínima correspondente, em vigas isotáticas e hiperestáticas. Na formulação, será considerado que o cabo de protensão possui um desenvolvimento segmentado em parábolas do segundo grau, onde o comprimento dessas parábolas serão pré- estabelecidos. Serão feitas ainda simplificações em relação à força de protensão e às perdas de protensão. Com a introdução de tais simplificações e com um artifício de mudança de variáveis, estaremos diante de um problema de programação linear, onde as incógnitas do problema serão a força de protensão e os coeficientes dos trechos de parábolas que representam a geometria do cabo. O objetivo desse problema de programação linear, será minimizar o custo da protensão, de forma que algumas restrições, previamente estabelecidas, sejam atendidas. Tais restrições, limitarão a geometria do cabo, uma vez que o mesmo deve ser contínuo, representado por curvas suaves, e estar contido dentro da viga, e limitarão as tensões nos bordos extremos da viga de forma que as Normas Brasileiras NBR 8681, NBR 7197 e NBR 7187 sejam atendidas. Serão considerados diversos casos de carga e as seções de estudo serão pré-definidas. Como resultado do projeto teremos o traçado ótimo de um cabo médio, e a força de protensão mínima P0, onde já estarão incluídas as perdas imediatas. A implementação da formulação foi desenvolvida em linguagem C, padrão ANSI, o que garante que o mesmo código possa ser compilado em computadores diferentes e por compiladores diferentes, facilitando a portabilidade do programa. Para a otimização, foi utilizado o programa comercial LINDO- Linear Interactive and Discrete Optimizer, que permite uma interação com o usuário, é prático e de grande eficiência. Serão testados e analisados quatro exemplos, variando em sua complexidade. Das quatro vigas testadas, uma foi apresentada por Calçada (1993) em seu artigo "Traçado Óptimo de Cabos de Pré-esforço em Pórticos", e as outras três foram projetadas por engenheiros em escritórios de cálculo estrutural. As duas soluções de projeto, a dada pelo programa e a obtida pelos escritórios, são comparadas de modo a validar tanto a formulação como o programa implementado.
This work is concerned with the formulation, implementation and test of a model for determination of the minimum prestressing force and the optimum tendon profile, to prestressed isostatics and hiperestatics beams. It will be considered in formulation, that the prestressing cable has a development segmented in second grade parabolas, in which the length of each one will be predetermined. In addition, simplifications will be considered with regard to the prestressing force and the prestressing losses. With these assumptions and an artifice of variables change, linear programming problem will be obtained, where the variables will be the prestressing force and the parabolas coefficients that represent the cable geometry. The objective of this linear programming problem will be to minimize the prestressing cost, based on some constraints. These constraints will limit the cable geometry, since this one has to be continue, represented for smooth curves and to be inside of the beam, and will limit the stresses at the top and at the bottom fibers of each studied sections according to Brazilian Codes NBR 8681, NBR 7197 e NBR 7187. Different loads cases will be considered and the studied sections will be predetermined. As project result, we will have an optimum tendon medium profile and the minimum prestressing force P0, where the immediate losses will be included. The formulation implementation was developed in "C" language, ANSI standard, which guarantees that the same code can be compiled in different computers and for different compilers, making the program portability easy. For optimization, the commercial program LINDO- Linear Interactive and Discrete Optimizer was used, which allows interaction with the user, is practical and very efficient. Four examples with different complexity will be tested and studied. From four beams tested, one was presented by Calçada (1993) in his paper "Traçado Óptimo de Cabos de Pré-esforço em Pórticos", and the other ones were designed by engineers in structural design offices. The two design solutions, the one given by the program and the other obtained by the offices, are compared in order to validate both the formulation and the program implemented.
El presente trabajo contiene la formulación, implementación y pruebas de un modelo para determinación del trazado ótimo de cables de protensión, bien como del valor de la fuerza de protensión mínima correspondiente, en vigas isotáticas y hiperestáticas. En la formulación, será considerado que el cable de protensión posee un desarrollo segmentado en parábolas de segundo grado, de dimensiones prestablecidas. Se considerarán simplificaciones en relación a la fuerza de protensión y a las pérdidas de protensión. Con la introducción de tales simplificaciones y con un artificio de cambio de variables, estaremos frente a un problema de programación lineal, donde las incógnitas del problema serán la fuerza de protensión y los coeficientes de los intervalos de parábolas que representan la geometría del cable. El objetivo de este problema de programación lineal será minimizar el costo de la protensión, de forma que sean atendidas algunas restricciones, previamente establecidas. Tales restricciones, limitarán la geometría del cable, que debe ser contínuo, representado por curvas suaves, y estar contenido dentro de la viga; y limitarán las tensiones en los bordes extremos de la viga para atender las Normas Brasileiras MBR 8681, MBR 7197 y MBR 7187. Se considerarán diversos casos de carga y las secciones de estudio serán predefinidas. Como resultado del proyecto tendremos el trazado óptimo de un cable medio y la fuerza de protensión mínima P0, donde estarán incluidas las pérdidas inmediatas. La implementación fue desarrollada en lenguaje C, padrón ANSI, que garantiza que el mismo código pueda ser compilado en computadores diferentes y por compiladores diferentes, facilitando la portabilidad del programa. Para la optimización, fue utilizado el programa comercial LINDO - Lineal Interactive and Discrete Optimizer, que permite una interacción con el usuario, es práctico y de gran eficiencia. Se analizaron cuatro ejemplos, variando su complejidad. De las cuatro vigas, una fue presentada por Calzada (1993) en su artículo "Trazado Ótimo de Cabos de Pré-esforzo en Pórticos", y las otras tres fueron projectadas por ingenieros de cálculo extructural. Las dos soluciones del proyecto, la dada por el programa y la obtenida por los ingenieros, son comparadas para evaluar la formulación del modelo y la implemantación del programa.
Gomez, Nicolas M. Eng Massachusetts Institute of Technology. "Design of prestressed, fabric-formed concrete beams". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111507.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 60-62).
Fabric forms and prestressing are both technologies for concrete structures that allow for less material to do more work. This thesis seeks to assess the feasibility and performance of fabric formed, prestressed beams with a keyhole cross-section, while varying parameters such as concrete strength, loading, beam depth, and prestressing force. They are designed for flexure via a sectional method, starting with the critical midspan section, and each section is iterated in an effort to minimize the beam weight. Beam strength and deflections are determined and once met, they are compared to more traditional prestress designs. Such beams are found to be governed primarily by strength criteria, as deflections are found to be minimal. These fabric formed beams can use nearly an identical amount of material as conventional I-beams with a constant cross-section, while requiring a higher prestressing force. Prestressed fabric formed beams are less efficient than an I-beam section, but should not be discounted as a viable element, because of their aesthetic appeal and further potential for optimization.
by Nicolas Gomez.
M. Eng.
Sarieddine, Marwan. "Optimal design of fabric formed concrete beams". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90155.
Pełny tekst źródłaCataloged from PDF version of thesis.
Includes bibliographical references (pages 57-58).
The topic of fabric formwork has emerged as a response to the rising need for material efficient designs that also incorporate attractive aesthetic and construction related features. The thesis approaches the topic of the optimization of the design of fabric formed concrete beams. The thesis proposes two methods: an analytical optimization method and a feasible region method. The optimum design of fabric formed reinforced concrete beams is discussed first and a sample output of the optimum design based on minimizing the cost of a cross-section is produced. A relatively direct design process based on simple polynomials is established that can conveniently guide designers to produce optimal designs. Based on sample results, savings of up to 55% in material cost could be accomplished using fabric formed beams. The subject of pre-stressed fabric formed beams is then approached using the two methods. Certain additional complexities are explained and some simplifications are done in order to arrive at an optimum design using the feasible region method.
by Marwan Sarieddine.
M. Eng.
Hristova, Elena Hristova. "Residual strength of corroded reinforced concrete beams". Thesis, Sheffield Hallam University, 2006. http://shura.shu.ac.uk/19838/.
Pełny tekst źródłaCojocaru, Razvan. "Lifting Analysis of Precast Prestressed Concrete Beams". Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32464.
Pełny tekst źródłaMaster of Science
Sas, Gabriel. "FRP shear strengthening of reinforced concrete beams". Doctoral thesis, Luleå tekniska universitet, Byggkonstruktion och -produktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25881.
Pełny tekst źródłaGodkänd; 2011; 20110328 (gabsas); DISPUTATION Ämnesområde: Konstruktionsteknik/Structural Engineering Opponent: Professor Giorgio Monti, University of Rome, Italy Ordförande: Professor Björn Täljsten, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet Tid: Fredag den 29 april 2011, kl 13.00 Plats: F1031, Luleå tekniska universitet
Law, Man-wai. "Strain energy capacity of reinforced concrete beams /". [Hong Kong : University of Hong Kong], 1987. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12228175.
Pełny tekst źródłaIsmail, Kamaran Sulaiman. "Shear behaviour of reinforced concrete deep beams". Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12600/.
Pełny tekst źródłaAl-lami, Karrar Ali. "Experimental Investigation of Fiber Reinforced Concrete Beams". PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2296.
Pełny tekst źródłaKong, Paul Y. L. "Shear strength of high performance concrete beams". Thesis, Curtin University, 1996. http://hdl.handle.net/20.500.11937/2600.
Pełny tekst źródłaKong, Paul Y. L. "Shear strength of high performance concrete beams". Curtin University of Technology, School of Civil Engineering, 1996. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=11337.
Pełny tekst źródłaMohamed, Ali M. S. "Peeling of plates adhesively bonded to reinforced concrete beams /". Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phm6968.pdf.
Pełny tekst źródłaChan, Ka-ho Enoch. "Experimental and numerical studies of concrete beams prestressed with unbonded tendons". Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40988004.
Pełny tekst źródłaGiaccio, Craig 1974. "Flange effectiveness in the resistance of shear on RC T-beams subjected to point loads". Monash University, Dept. of Civil Engineering, 2003. http://arrow.monash.edu.au/hdl/1959.1/5708.
Pełny tekst źródłaHo, Ching-ming Johnny, i 何正銘. "Inelastic design of reinforced concrete beams and limited ductilehigh-strength concrete columns". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B27500305.
Pełny tekst źródłaNixon, Jeffrey McMillan Schindler Anton K. "Evaluation of the maturity method to estimate concrete strength in field applications". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/NIXON_JEFFREY_32.pdf.
Pełny tekst źródłaRoberts, James Benson Schindler Anton K. "Evaluation of self-consolidating concrete for use in prestressed girder applications". Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Thesis/ROBERTS_JAMES_43.pdf.
Pełny tekst źródłaMaruri, Rodolfo Felipe. "Iterative computer analysis of post-tensioned concrete beams and frames". Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/19510.
Pełny tekst źródłaSiu, Wing-ho. "Flexural strengthening of reinforced concrete beams by bolted side plates". Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43278735.
Pełny tekst źródłaFoo, M. H. "Behaviour of partially prestressed concrete structures under fatigue loading /". Title page, table of contents and abstract only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phf686.pdf.
Pełny tekst źródłaLi, Lingzhi, i 李凌志. "New partial interaction models for bolted-side-plated reinforced concrete beams". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899636.
Pełny tekst źródłapublished_or_final_version
Civil Engineering
Doctoral
Doctor of Philosophy
Kavanaugh, Bryan Palmer Schindler Anton K. "Creep behavior of self-consolidating concrete". Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Civil_Engineering/Thesis/Kavanaugh_Bryan_38.pdf.
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