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Dissertations / Theses on the topic 'Beam with Openings'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Najafi, Mohsen. "Behaviour of axially restrained steel beams with web openings at elevated temperatures." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/behaviour-of-axially-restrained-steel-beams-with-web-openings-at-elevated-temperatures(7e807ad7-5d5b-4635-ad39-7eae448736d8).html.

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Steel beams with web openings are frequently used in construction to achieve attractive, flexible and optimised design solutions. These beams are used to provide passages for building services, to reduce the overall construction height and to achieve long spans. However, the presence of the openings may lead to a substantial reduction in the load carrying capacity of the beam at both ambient and elevated temperatures and introduce additional failure modes including shear-moment interaction at the location of the openings causing the Vierendeel mechanism. Steel beams in practical construction a

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Yoo, Tae Min. "Strength and Behaviour of High Strength Concrete Deep Beam with Web Openings." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/365524.

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Over the last few decades, concrete deep beam research has attracted attentions of both academics and professionals due to the increasing use of this type of structural members in construction projects. Evaluating the ultimate strength of concrete deep beams has been a great challenge because of the complexity of these structural members. Moreover, using high strength material and having openings in the web increase the difficulties of predicting the ultimate strength. Normally, web openings are introduced to accommodate services such as air-conditioning ducts, cables, and other essential serv

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3

Shaker, I. M. "The strength and behaviour of fibre reinforced concrete deep beams with and without web openings." Thesis, Cardiff University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377128.

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4

Horák, Marek. "Pevnostní analýza nosníku s tenkou stojinou - vliv otvorů a tahového pole." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234239.

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In design of an aircraft structure, the great emphasis is placed on achieving high weight efficiency. This thesis is focused on the stress analysis of the spars with thin web with or without web openings, which is one of the most important parts of the airplane structures. In comparison with traditional spars or beams, which are widely used in civil engineering applications, the design of the beam with thin web is more complicated. Thesis contains useful information for analytical calculation of this type of spars and its verification using finite element method and experimental measurement.

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5

Cho, Soon Ho. "Slab behaviour in composite beams at web openings." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74647.

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An explanation is provided for the slab behaviour in composite beams at web holes where the concrete slab carries heavy vertical shear. This is based on the truss concept, and requires consideration of shear studs in the hole region as vertical tension members. According to this, a structural action between the concrete slab and shear connectors for carrying or transferring vertical shear to the steel beam was clearly identified.<br>On the basis of the slab behaviour identified, truss idealizations capable of determining the slab shear carrying capacity in a rational manner were developed. The

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6

Al, Taee Mohammed. "CFRP strengthening of steel beams with web openings." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/cfrp-strengthening-of-steel-beams-with-web-openings(050d4a61-1d9a-49da-87de-a0785757c126).html.

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During the service life of a building structure, the introduction of web openings into existing steel floor beams is often required to allow for new services such as air conditioning, sprinkler systems, telecommunications etc. However, the presence of large openings in the webs can significantly reduce the shear and bending strength capacity of the beams. Traditionally, the welding of additional steel plates around the opening areas is adopted as a means of strengthening and stiffening. This not only presents practical difficulties but can induce residual stresses which weaken fatigue performa

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7

Assenso, Antwi Akwasi Manu. "Behavior of wide flange beams with web openings." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/978.

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Behavior of wide flanged beams is of much importance to civil engineers as this one of the main materials used in steel structures. Openings are made in the web of beams to pass services pipes from one side of the building to another, when these openings are made in the beams, the shear and moment capacity at this section will be reduced. This will increase stresses at this section of the beam and will subsequently affect the stress distribution in the beam with web opening. Longitudinal stiffeners are placed at the top and bottom edges of the web opening to increase both moment and shear capa

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8

Baharom, Shahrizan. "Composite beams with openings in metal-ribbed decking slabs." Thesis, Swansea University, 2010. https://cronfa.swan.ac.uk/Record/cronfa42871.

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9

WISSMANN, JORGE AUGUSTO. "STUDY OF STEEL BEAMS WITH WEB OPENINGS INCLUDING CELLULAR, LITZKA AND DEPTH-EXPANDED BEAMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2009. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=31879@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Estruturas cada vez mais esbeltas têm sido usadas para otimizar edifícios de grande porte e reduzir custos, inclui-se nisto o pé-direito das edificações e portanto a altura das vigas. Grandes vãos são cada vez mais comuns, principalmente quando se utiliza aço em edificações, gerando então amplos espaços de serviço em uma direção, mas obstáculos na outra pela continuidade das vig

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10

Nordblad, Erik. "Opening New Radio Windows and Bending Twisted Beams." Doctoral thesis, Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-158797.

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In ground based high frequency (HF) radio pumping experiments, absorption of ordinary (O) mode pump waves energises the ionospheric plasma, producing optical emissions and other effects. Pump-induced or natural kilometre-scale field-aligned density depletions are believed to play a role in self-focussing phenomena such as the magnetic zenith (MZ) effect, i.e., the increased plasma response observed in the direction of Earth's magnetic field. Using ray tracing, we study the propagation of ordinary (O) mode HF radio waves in an ionosphere modified by density depletions, with special attention t

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11

Zainal, Abidin Ahmad Razin. "Modelling of local elastic buckling for steel beams with web openings." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/12789.

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This work is mainly concerned with the development of sophisticated yet efficient methods for assessing the elastic buckling of steel beams with web openings, focussing on local buckling effects in the web region. A new computational method is proposed which extends the use of the Element Free Galerkin (EFG) method for the numerical discretisation combined with a simplified buckling assessment approach based on the Rotational Spring Analogy (RSA). The new approach considers several potential simplifications offering a balance between computational efficiency and accuracy in local buckling anal

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12

Olimb, Ane Marte. "Testing of Fibre Reinforced Concrete Structures : Shear Capacity of Beams with Openings." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18527.

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The thesis examines the use of fibre reinforced concrete in carrying structures. The basis of the project is shear capacity of beams with openings which is a very common structural element. It has been carried out full-scale tests of one reference beam and three beams with openings reinforced with different reinforcement combinations.The first part of the report consists of a literature study based on earlier research and published material on fibre reinforced concrete and its use in carrying structures. Different fibres and their properties are described as well as the components in concrete

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13

Brinkhus, Raquel Nailê. "Análise de vigas casteladas e vigas casteladas mistas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/115556.

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As vigas casteladas são fabricadas a partir do corte em zigue-zague da alma de perfis I, após são deslocados e soldados, fazendo com que a viga tenha uma expansão na altura, porém sem aumentar a massa do perfil. As mesmas voltaram a ser uma opção competitiva devido aos avanços tecnológicos, que possibilitam a automação do corte e solda da alma do perfil e com o inicio das produções de perfis I laminados no Brasil em 2002. Apresenta grandes vantagens proporcionando a passagem de dutos e tubulações, aumento na rigidez no plano de flexão e boa estética. O presente trabalho apresenta um estudo ana

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14

Tsadarides, Konstantinos-Daniel. "Structural performance of perforated steel beams with novel web openings and with partial concrete encasement." Thesis, City University London, 2010. http://openaccess.city.ac.uk/11660/.

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The research covered in this thesis is concerned with the effects of the behaviour and load carrying capacities of classes of steel beam structures with various shapes of web openings. A comprehensive investigation on non-composite and partially concrete encased perforated steel Isections with large web openings positioned along the centre-line of the beams was undertaken. This thesis enhances the current knowledge on these classes of perforated beams, as previous research has shown that these beams are susceptible to various failure modes, due to the existence of large web openings. Currently

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15

Naili, El-Hadi Ali. "Behaviour of cellular beams having different opening sizes, steel decking shapes and restraint effect in fire conditions." Thesis, Ulster University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.568793.

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The growing popularity of the use of cellular steel beams in composite floors comes at the same time as an increasing attention to fire safety engineering design. The recommendation for their design in fire limit states remains very primitive and this is due to the lack of general research in this area. A total of six simply-supported and restrained composite cellular floor beams subjected to elevated temperatures, were tested at The University of Ulster. The first three beams conducted were simply-supported of 4.5 m span lengths, with main variables, different steel geometries and opening sha

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16

Barra, Cortés Maximiliano Hernán. "Analysis of beams with transverse opening using a shear-flexure interaction model and validation with experimental data." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/136162.

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Ingeniero Civil<br>Un modelo que combina las respuestas de corte y flexión fue desarrollado por Massone et al. (2006). Este modelo ha sido validado para muros esbeltos y muros cortos (Massone et al., 2009). El modelo fue adaptado para su uso en vigas simplemente apoyadas con ciertas particularidades, como fibras de acero en la mezcla de hormigón o la utilización de hormigón de auto consolidación (Galleguillos, 2010 y Gotschlich, 2011 respectivamente). El modelo de interacción corte-flexión fue adaptado para simular vigas de hormigón armado en cantiléver con una abertura rectangular en la dire

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17

Keerthan, Poologanathan. "Shear behaviour and design of LiteSteel beams." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/36208/1/Poologanathan_Keerthan_Thesis.pdf.

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OneSteel Australian Tube Mills has recently developed a new hollow flange channel cold-formed section, known as the LiteSteel Beam (LSB). The innovative LSB sections have the beneficial characteristics of torsionally rigid closed rectangular flanges combined with economical fabrication processes from a single strip of high strength steel. They combine the stability of hot-rolled steel sections with the high strength to weight ratio of conventional cold-formed steel sections. The LSB sections are commonly used as flexural members in residential, industrial and commercial buildings. In order to

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18

Kunzler, Paulo Schmeling. "Análise paramétrica por elementos finitos de vigas de concreto armado e protendido pré-tracionadas com abertura na alma." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/107504.

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As exigências do mercado da construção civil fazem com que não haja espaço para a passagem de tubulações sob as vigas que sustentam as lajes de concreto. Então, uma solução cada vez mais frequente é a realização de furos na alma das vigas para a passagem de dutos. A presença destes furos altera o comportamento das vigas gerando concentração de tensões, fissuras e possibilidade de esmagamento do concreto. O dimensionamento de vigas de concreto armado com furos tem sido baseado em métodos empíricos ou no método das bielas e tirantes. Contudo, nas vigas de concreto protendido, surgem novos fatore

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19

Monteiro, Carlos Alberto de Araujo. "Melhoria do cetano em óleo diesel : abertura do ciclo da decalina sobre catalisadores de Pt, Ir ou Rh suportados em zeólitas FAU e BEA." Universidade Federal de São Carlos, 2011. https://repositorio.ufscar.br/handle/ufscar/3931.

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Made available in DSpace on 2016-06-02T19:55:36Z (GMT). No. of bitstreams: 1 5188.pdf: 6910424 bytes, checksum: 50b02c26311d2e058a7ac27b5419e05d (MD5) Previous issue date: 2011-06-08<br>Environmental laws and stricter quality specifications have driven the development of technologies for improving the cetane number in diesel fuel. In addition to the saturation of (poly)aromatic compounds, responsible for limited gains, ring opening of at least one ring of (poly)cycloalkane, without loss of yield by cracking, is a promising strategy to maximize this property. Numerous studies have demonstrate

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20

Boon, Chia Weng. "Distinct element modelling of jointed rock masses : algorithms and their verification." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:6bb76a48-94b3-4bea-9a06-9fd2c7208b52.

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The distinct element method (DEM) is a useful tool in rock engineering to model jointed rock masses. To simulate a jointed rock mass realistically, the main challenge is to be able to capture its complex geometry which consists of blocks with various shapes and sizes, and to model the interactions between these blocks. The main contribution of this thesis is the development of novel algorithms in the DEM to model jointed rock masses, namely rock slicing procedures for block generation, and algorithms for contact detection between polygonal blocks in 2-D or polyhedral blocks in 3-D. These algor

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21

Durif, Sébastien. "Comportement mécanique des poutres cellulaires à ouvertures sinusoïdales : développement d'un modèle anlytique adapté." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2012. http://tel.archives-ouvertes.fr/tel-00872126.

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L'objectif de ce travail de thèse est de développer une approche analytique permettant de définir la charge ultime d'une poutre cellulaire à ouvertures sinusoïdales. En effet, l'évolution des techniques de production a permis le développement d'une nouvelle forme de poutre cellulaire munie d'ouvertures sinusoïdales : la poutre AngelinaTM. Cette nouvelle forme d'ouverture implique de nouveaux modes de ruine. De ce fait, en vue de développer un modèle de calcul analytique adapté à cette nouvelle forme d'ouverture, une campagne d'essais expérimentaux a été menée sur des poutres cellulaires à ouve

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Rodrigues, Flávio. "Comportamento estrutural de vigas de aço com abertura na alma." Universidade do Estado do Rio de Janeiro, 2007. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=421.

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Limitações de altura são frequentemente impostas à edificações de múltiplos pavimentos por regulamentos de zoneamento urbano, aspectos econômicos e considerações estéticas. Um pé-direito alto é normalmente requerido para se permitir a passagem de tubulações e dutos de grande diâmetro sob vigas de aço, conduzindo muitas vezes à alturas inaceitáveis entre pavimentos de edificações. Várias são as soluções possíveis para se resolver tal inconveniência, dentre elas pode-se citar: Vigas com inércia variável, stub girders , treliças mistas e vigas misuladas. Outra solução frequentemente utilizada é a

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Růžička, Jiří. "Polyfunkční koncový dům v Karlových Varech." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265694.

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The project solves a multifunctional Duma building in a vacant lot, contemplated the construction site is located in Carlsbad, in the street Vyhlíce. This is a protected site spa. Part of the project's layout and structural design of the house. It is a six-storey house with an attic and a basement floor. It is designed as a free-standing in the gap as the final house. The layout is divided into two complete units with their own input. There are spaces for business and residential units for permanent housing. Part of the living area are also room house equipment. Inputs to both parts are wheelc

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Ciou, Yi-Fan, and 邱義汎. "Optimal Design of Structures with Openings Using Beam and Column Elements." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/91024302413858107026.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>104<br>Real buildings usually use beams and columns system, but topology optimization is difficult to apply in this system. This research expect to use topology optimization design in the buildings with beams and columns system. We use beam elements and column element to combine topology optimization, that topology optimization is more likely to make the application in the real buildings. There are many structures with openings like door, windows or room for pipes. Stiffness of structures will decrease because of openings. This research also expect to use optimizati

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Yew, Jen-Yu, and 游振宇. "Electron Beam Direct Writing Lithography Process and Formation of NiSi2, CoSi2 inside Deep Submicron Size Oxide Openings." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/44072277420829930981.

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博士<br>國立清華大學<br>材料科學與工程學研究所<br>85<br>The formation of NiSi2 and CoSi2 on silicon inside 0.1-0.6 μm oxide openings prepared by electron beam lithography has been investigated by transmission electron microscopy, field emission scanning electron microscopy, auger electron spectroscope, thin films stress measurement, and sheet resistance measurement. Two types of electron beam resists, positive type resist ZEP520 and negative type chemical amplified resist SAL601, were used in the electron beam direct writing lithography. The O.1 μm oxide openings pattern in the oxide layer can be achieved b

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Yang, Hsiao-Ying, та 楊曉瑩. "Formation of Self-Aligned TiSi2 on (001)Si inside 0.1-0.6μm Oxide Openings Prepared by Electron Beam Lithography". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/67870510232188111525.

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碩士<br>國立清華大學<br>材料科學工程學系<br>85<br>The effects of substrate heating and preamorphization on the formation of self-aligned TiSi2 on (001)Si in both large-area wafers and inside 0.1-0.6μm oxide openings of patterned wafers have been investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Auger electron spectroscopy (AES), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and sheet resistance measurement. Substrate heating and preamorphization were found to decrease the grainsize of high resistivity C49-TiSi2. The phase transformation of tita

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27

Shih, Tsu-Han, and 施祖涵. "Mechanical Behavior of Steel Beam-to-Column Connections with Beam Web Opening." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/79818744208396015532.

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博士<br>國立交通大學<br>土木工程系所<br>104<br>Well-designed special moment frames are expected to be capable of dissipating numerous energy during earthquake through the development of plastic flexural deformation on the beams. In order to prevent the brittle failure and improve the seismic behavior, beam-to-column connections are generally designed to force the plastic hinge formed on the beam at a distance away from the column by reducing beam section close to the column or reinforcing the connection at beam-column interface. 　　This study was conducted to explore the feasibility and seismic performance o

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Liou, Yu-Ming, and 劉育明. "Structural behavior of steel beam with web opening." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/21833873527108057284.

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Holle, Brian G. "Testing of a model composite beam with web opening." 1987. http://hdl.handle.net/2097/22361.

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Young-Sang, Kuo, and 郭永昇. "Experiment and Analysis of Reinforced Concrete Beams with Openings." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/65278435288937453689.

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碩士<br>中原大學<br>土木工程研究所<br>86<br>In modern structures, the complicated piping system for wiring and services becomes a problem for structural designers. In order not to reduce the usable height of each floor, openings in beams for piping to go through is not unusual. In reinforced concrete beams, openings will cause geometric discontinuity in its cross section. Thus, stress concentrations occurred around the openings will cause cracks. Therefore, in this paper, three types of beams will be studied, namely: beams with no opening, beams with four and six circular openings respectively.

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XIE, GUO-XUN, and 謝國勳. "Behavior and repairing of openings in reinforced concrete beams." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/09336550332191066802.

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Gattani, Sanjay N. "Test of a model composite beam with a web opening." 1987. http://hdl.handle.net/2097/22358.

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Yang, Keun-Hyeok, and Ashraf F. Ashour. "Effectiveness of Web Reinforcement around Openings in Continuous Concrete Deep Beams." 2008. http://hdl.handle.net/10454/7674.

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yes<br>Twenty two reinforced concrete continuous deep beams with openings and two companion solid deep beams were tested to failure. The main variables investigated were the configuration of web reinforcement around openings, location of openings, and shear span-to-overall depth ratio. The influence of web reinforcement on controlling diagonal crack width and load capacity of continuous deep beams with openings was significantly dependent on the location of openings. The development of diagonal crack width and load capacity of beams having openings within exterior shear spans were insensitive

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Chen, Jung-hui, and 陳榮輝. "Shear Strength of Reinforced Concrete Deep Beams with Web Openings." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/61886691043568997098.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>97<br>In modern structures, the complicated piping system for wiring and services becomes a problem for structural designers. In order not to reduce the usable height of each floor, openings in beams for piping to go through is not unusual. In reinforced concrete beams, openings will cause geometric discontinuity in the cross section. Thus, stress concentrations occurred around the openings will cause cracks. This study presents an experimental investigation of reinforced concrete deep beams with web openings subjected to vertical loads. Eighteen specimens were test

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郭明昌. "Experimental Study of Steel Reinforced Concrete Beams with Web Openings." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/74784368218425762582.

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Yang, Keun-Hyeok, and Ashraf F. Ashour. "Structural Behaviour of Reinforced Concrete Continuous Deep Beams with Web Openings." 2007. http://hdl.handle.net/10454/7692.

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yes<br>Ten reinforced-concrete continuous deep beams with openings were tested to failure. The main variables investigated were the shear span-to-overall depth ratio, and the size and location of openings. Two failure modes influenced by the size and location of web openings regardless of the shear span-to-overall depth ratio were observed. The normalised load capacity of beams having a web opening area ratio of 0·025 within exterior shear spans was approximately similar to that of their companion solid beams. Continuous deep beams having web openings within interior shear spans exhibited a hi

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Yang, Keun-Hyeok, and Ashraf F. Ashour. "Inclined reinforcement around web opening in concrete beams." 2007. http://hdl.handle.net/10454/869.

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Yes<br>Twelve reinforced-concrete continuous deep beams having web openings within interior shear spans were tested to failure. The main variables investigated were the opening size and the amount of inclined reinforcement around openings. An effective inclined reinforcement factor combining the influence of the amount of inclined web reinforcement and opening size is proposed and used to analyse the structural behaviour of continuous deep beams tested. It was observed that the end support reaction, diagonal crack width and load capacity of beams tested were significantly dependent o

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Yang, K. H., and Ashraf F. Ashour. "Structural behaviour of reinforced concrete continuous deep beams with web openings." 2007. http://hdl.handle.net/10454/862.

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Ten reinforced-concrete continuous deep beams with openings were tested to failure. The main variables investigated were the shear span-to-overall depth ratio, and the size and location of openings. Two failure modes influenced by the size and location of web openings regardless of the shear span-to-overall depth ratio were observed. The normalised load capacity of beams having a web opening area ratio of 0.025 within exterior shear spans was approximately similar to that of their companion solid beams. Continuous deep beams having web openings within interior shear spans exhibited a higher lo

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chao, po, and 黃柏超. "Behavior of Concrete Beams with Web Openings Subjected to Shear Forces." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/53474119424552208430.

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碩士<br>中原大學<br>土木工程學系<br>87<br>This research is to study the behavior of concrete beams with web openings under shear forces, by investigating the ultimate shear forces of concrete beams with different reinforced methods. Test results show that, the bending stiffness and ultimate strength of each specimen decreases with web openings. And three reinforced methods can increases the bending stiffness and ultimate strength for beams tested in this research. Steel wire net is the best Reinforced methods to control crack. Reinforced methods of using stirrup is convent for construction.

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Liu, Nai-Wei, and 劉乃瑋. "Focused ion beam selective closing and opening of ordered anodic alumina nanochannels." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/93602463586731287915.

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博士<br>國立臺灣大學<br>材料科學與工程學研究所<br>96<br>The thesis describes a novel process to selectively close and open certain region of an anodic alumina nanochannel array by bombarding its surface with high and low energy focused-ion-beam respectively. This ion induced gating technique provides a platform for the selective growth of different materials into different regions of a nanochannel array and facilitates the fabrication of multi-element nanowire arrays on an anodic alumina substrate. Since this unique substrate, which has self-aligned nanochannels of extremely high aspect ratio, is being extensive

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Liu, Nai-Wei. "Focused ion beam selective closing and opening of ordered anodic alumina nanochannels." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2003200823135400.

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Thompson, James M. "Behavior and design of precast prestressed concrete inverted tee girders with multiple web openings for service systems /." Diss., 2004. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3127541.

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陳紀勛. "Seismic Behavior of Steel Connections between Columns and Beams with Web Openings." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/y4cwpn.

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碩士<br>國立交通大學<br>土木工程系所<br>96<br>Steel beams with web openings in plastic zone will affect the plastic deformation capacity and bending and shear strength of the steel beams. This research was conducted to experimentally investigate the seismic behavior of beam-to-column subassemblages, consisting of H-shaped steel columns and steel beams with circular web openings in the plastic zone. Five full-scale specimens were tested in this study. One is unreinforced beam-to-column connection, and the other four specimens are reinforced with either shear tab or vertical stiffener at beam-to-column connec

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Saripalli, Sai Ram Reddy. "Study on Torsional Behaviour of Retrofitted Rectangular RC Beams with Web Openings." Thesis, 2015. http://ethesis.nitrkl.ac.in/7279/1/Study_Reddy_Saripalli_2015.pdf.

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In modern building construction web openings become necessary to provide utility ducts like water supply lines, air conditioning ducts etc. These ducts cause potential weakness in any construction hence affecting strength, serviceability and stability of the structure. There will be more adverse impact on structures if web opening has to pass through the beams or columns. Sometime in unavoidable situations openings are essential to pass through existing load bearing elements of structure hence required to strengthen externally to restore the strength. External jacketing by glass, carbon, basal

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Lawson, R. M., Dennis Lam, E. Aggelopoulos, and F. Hanus. "Serviceability performance of composite cellular beams with partial shear connection." 2018. http://hdl.handle.net/10454/16644.

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Yes<br>For composite cellular beams, additional deflections occur due to the loss of bending and shear stiffness at the opening positions and also due to slip in the shear connectors caused by partial shear connection. Design formulae are presented for the additional deflection of composite beams with circular openings or for cellular beams as a function of the proportionate depth of the openings. The simplified formulae are calibrated against finite element results for both cellular and solid web beams and also against measured deflections of a 15.3 m composite cellular beam test. This additi

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Shu-Min, Huang, and 黃淑敏. "Reinforced concrete deep beams with web openings strengthened by carbon fiber reinforced plastics." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/06129336807766246634.

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碩士<br>中國科技大學<br>土木與防災設計研究所<br>101<br>The objective of this study is to examine the effect of carbon fiber reinforced polymer (CFRP) on the shear strength of deep beams with web openings. A total of 21 reinforced concrete deep beams with web openings were tested, 18 of them were made of high-strength concrete and the others were made of normal-strength concrete. In high-strength concrete specimens, twelve were externally wrapped with two layers of CFRP, six of them strengthened in the horizontal direction and the others in the vertical direction. In normal-strength concrete specimens, two were

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Xu, Ming-Ching, and 許銘卿. "Behavior of Reinforced Concrete Beams with Eccentic Web Openings Subjected to Pure Bending." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/01875354086236122537.

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碩士<br>中原大學<br>土木工程研究所<br>89<br>In modern structures, there is always the case that pipes passes through the beams in order to maintain the clear height. These prefabricated openings in the beams may affect the safety and toughness of the structure. Therefore, full size reinforced concrete beams with web openings are tests in this research. The effect of the position, size and numbers of openings on the behavior of the beam is investigated. Test result shows that web opening always reduces the bending stiffness of the beam. When the location of the opening moves upwards from the bottom of the b

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Yang, Keun-Hyeok, H.-S. Chung, and Ashraf F. Ashour. "Influence of inclined web reinforcement on reinforced concrete deep beams with web openings." 2007. http://hdl.handle.net/10454/7672.

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yes<br>This paper reports the testing of fifteen reinforced concrete deep beams with openings. All beams tested had the same overall geometrical dimensions. The main variables considered were the opening size and amount of inclined reinforcement. An effective inclined reinforcement factor combining the influence of the amount of inclined reinforcement and opening size on the structural behaviour of the beams tested is proposed. It was observed that the diagonal crack width and shear strength of beams tested were significantly dependent on the effective inclined reinforcement factor that ranged

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G, Hemanth Kumar. "Eexperimental and numerical studies on behaviour of frp strengthened deep beams with openings." Thesis, 2012. http://ethesis.nitrkl.ac.in/3912/1/E_thesis__Hemanth.pdf.

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Reinforced concrete deep beams are widely used as transfer girders in offshore structures and foundations, walls of bunkers and load bearing walls in buildings. The presence of web openings in such beams is frequently required to provide accessibility such as doors and windows or to accommodate essential services such as ventilating and air conditioning ducts. Enlargement of such openings due to architectural/mechanical requirements and/or a change in the building’s function would reduce the element’s shear capacity, thus rendering a severe safety hazard. Limited studies have been reported in

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Feng, Cheng Hsu, and 鄭旭峰. "High-strength Concrete Deep Beams With Web Openings Strengthened By Carbon Fiber Reinforced Plastics." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/86096211937622680812.

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碩士<br>中國科技大學<br>土木與防災設計研究所<br>101<br>The objective of this study is to investigate the effect of carbon fiber reinforced polymer (CFRP) on the shear strength of deep beams with web openings. A total of 18 high-strength concrete deep beams with web openings were tested. Twelve were externally wrapped with four layers of CFRP, six of them strengthened in the horizontal direction and the others in the vertical direction. Parameters of the configuration of CFRP, the size of openings and the location of openings were covered in this study. Test results indicate that the shear strengths of deep beam

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