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Rozprawy doktorskie na temat „Cold-formed steel structures”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Feng, Ran. "Design of cold-formed stainless steel tubular joints." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41290628.

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Zhou, Feng. "Web crippling of cold-formed stainless steel tubular sections." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37228316.

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Feng, Ran, and 馮然. "Design of cold-formed stainless steel tubular joints." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41290628.

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Uygar, Celaletdin. "Seismic Design Of Cold Formed Steel Structures In Residential Applications." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607294/index.pdf.

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iv ABSTRACT SEISMIC DESIGN OF COLD FORMED STEEL STRUCTURES IN RESIDENTIAL APPLICATIONS Uygar, Celaletdin M.Sc., Department of Civil Engineering Supervisor: Prof. Dr. &Ccedil<br>etin Yilmaz May 2005, 82 pages In this study, lateral load bearing capacities of cold formed steel framed wall panels are investigated. For this purpose lateral load bearing alternatives are analyzed numerically by computer models and results are compared with already done experimental studies and approved codes. In residential cold formed steel construction, walls are generally covered with cladding material like orien

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Davies, Russell John. "The behaviour of press-joining in cold-formed steel structures." Thesis, University of Edinburgh, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534541.

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Zhou, Feng, and 周鋒. "Web crippling of cold-formed stainless steel tubular sections." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37228316.

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Zhao, Wen-Bin. "Behaviour and design of cold-formed steel hollow flange sections under axial compression." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16909/1/Wen-Bin_Zhao_Thesis.pdf.

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The use of cold-formed steel structures is increasing rapidly around the world due to the many advances in construction and manufacturing technologies and relevant standards. However, the structural behaviour of these thin-walled steel structures is characterised by a range of buckling modes such as local buckling, distortional buckling or flexural torsional buckling. These buckling problems generally lead to severe reduction and complicated calculations of their member strengths. Therefore it is important to eliminate or delay these buckling problems and simplify the strength calculations of

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Zhao, Wen-Bin. "Behaviour and design of cold-formed steel hollow flange sections under axial compression." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16909/.

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The use of cold-formed steel structures is increasing rapidly around the world due to the many advances in construction and manufacturing technologies and relevant standards. However, the structural behaviour of these thin-walled steel structures is characterised by a range of buckling modes such as local buckling, distortional buckling or flexural torsional buckling. These buckling problems generally lead to severe reduction and complicated calculations of their member strengths. Therefore it is important to eliminate or delay these buckling problems and simplify the strength calculations of

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Cheng, Shanshan. "Fire performance of cold-formed steel sections." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3316.

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Thin-walled cold-formed steel (CFS) has exhibited inherent structural and architectural advantages over other constructional materials, for example, high strength-to-weight ratio, ease of fabrication, economy in transportation and the flexibility of sectional profiles, which make CFS ideal for modern residential and industrial buildings. They have been increasingly used as purlins as the intermediate members in a roof system, or load-bearing components in low- and mid-rise buildings. However, using CFS members in building structures has been facing challenges due to the lack of knowledge to th

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Shamim, Iman. "Seismic design of lateral resisting cold-formed steel framed (CFS) structures." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117113.

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Seismic design provisions for wood sheathed / cold-formed steel (CFS) framed shear walls and CFS strap braced walls are available in the AISI S213-07 Standard. However, the National Building Code of Canada (NBCC), as well as the CSA S136 and the AISI S213 Standards, at present, do not address the seismic design of steel sheathed / CFS framed shear walls for use in Canada. The existing design guidelines for CFS framed shear walls are based on data obtained from static tests carried out under both monotonic and reversed cyclic loading protocols. The objective of this research was to develop seis

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Sapiee, Siti Fairuz Binti. "Behaviour and strength of screw connections in cold-formed steel structures." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/1367.

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Self-drilling screws are the primary means of fastening cold-formed steel members in cold-formed thin-gauge steel construction. This study was carried out to investigate the behaviour and strength of single-shear connections formed with self-drilling screws. The influences of the number of screws, screw spacing and screw patterns on the strength of self-drilling screw connections were determined. It was found that the numbers of screws and screw spacing affect the performance of the screw connection significantly as compared to screw patterns.

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Lui, Wing Man. "Design of cold-formed high strength stainless steel tubular columns and beam-columns /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20LUI.

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Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 149-154). Also available in electronic version. Access restricted to campus users.

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Blum, Hannah Beth. "Long-Span Cold-Formed Steel Double Channel Portal Frames." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/16290.

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A comprehensive study on long-span cold-formed steel portal frames composed of back-to-back channel sections is presented. The aim of the study is to determine appropriate design guidelines in order for engineers to safely and efficiently build larger frames. The system analyzed herein is a haunched portal frame with a knee brace connected between the column and rafter. The objectives of the research were achieved through an extensive experimental study as well as numerical investigations. A comprehensive experimental program was completed to determine the strength and behavior of the frames.

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Young, B. (Ben). "The behaviour and design of cold-formed channel columns." Thesis, Faculty of Engineering, 1997. http://hdl.handle.net/2123/13673.

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Rinchen. "Long-span cold-formed steel single C-section portal frames." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/18882.

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This thesis presents a comprehensive study of long-span cold-formed steel single C-section portal frames. The study includes the formulation of a nonlinear beam finite element for thin-walled sections, a series of full-scale frame tests and component tests, finite element modelling and advanced analysis followed by the formulation of design guidelines. The study was aimed at exploring the structural behaviour through experiment and numerical analysis towards developing provisions for the design of cold-formed steel portal frames using Advanced Analysis. A nonlinear thin-walled beam element for

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Rasmussen, Kim J. R. "Stability of thin-walled structural members and systems." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18194.

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This DEng thesis consists of 83 articles containing research material on the stability of thin-walled structural members and systems with emphasis on metal structures. Metal structures are used widely in the construction industry. They include structural members and frames made from rolled and fabricated steel, cold-formed steel, stainless steel and aluminium. Common to these products is the desire to minimise the cross-sectional area to reduce weight and cost. Structural cross-sections are therefore thin-walled and prone to buckling, and an overriding consideration in the design of metal str

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Henriques, De Sena Cardoso Francisco Manuel. "System reliability-based criteria for designing cold-formed steel structures by advanced analysis." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14498.

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This doctoral thesis develops a system-reliability based approach for designing cold-formed steel structures by advanced analysis. Specifically, this doctoral thesis carries out the underpinning structural analyses and reliability studies that enable the implementation of the next generation of system-based design-by-analysis steel specifications, i.e., specifications that establish a design approach where analysis and capacity checks are carried out in a single step. The study begins by developing and validating finite element (FE) models and advanced analyses that are capable of accurately

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Wilkinson, Simon James. "An investigation into the behaviour of steel proprietary support structures." Thesis, Nottingham Trent University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369256.

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Gunawan, Leonardus. "Numerical models to simulate the thermal performance of LSF wall panels." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/49856/1/Leonardus_Gunawan_Thesis.pdf.

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Fire safety of buildings has been recognised as very important by the building industry and the community at large. Gypsum plasterboards are widely used to protect light gauge steel frame (LSF) walls all over the world. Gypsum contains free and chemically bound water in its crystal structure. Plasterboard also contains gypsum (CaSO4.2H2O) and calcium carbonate (CaCO3). The dehydration of gypsum and the decomposition of calcium carbonate absorb heat, and thus are able to protect LSF walls from fires. Kolarkar and Mahendran (2008) developed an innovative composite wall panel system, where the in

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Morello, Denise. "Seismic performance of multi-storey structures designed with cold-formed steel wood sheathed shear walls." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40764.

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Despite the widespread use of cold-formed steel (CFS) in Canada, the 2005 National Building Code of Canada (NBCC) do not address the seismic design. Previous research conducted at McGill University resulted in the development of a design procedure and seismic force modification factors related to ductility and overstrength, Rd and Ro, for the CFS frame wood sheathed shear wall system. Based on this prior research, the American Iron and Steel Institute (AISI) included the design procedure and the force modification factors for the wood sheathed shear walls into the North American Lateral Stand

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Li, Xilin. "Modal decomposition of instabilities and its applications in analysis and design of cold-formed steel structures." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/18962/.

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The construction industry has witnessed a widespread of cold-formed steel structures (CFS) in the recent years. However, despite its advantages due to the thin-walled nature of such kind of structures they are highly susceptible to instabilities including coupled instabilities. Currently the modal decomposition method used to analyse these coupled instabilities still has space of improvement. For example, the method generates overly rigid distortional and global modes, and an increased computational effort is needed when dealing with complex cross-sections. Regarding the design of CFS, the exi

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Koen, Damien Joseph. "Structural Capacity of Light Gauge Steel Storage Rack Uprights." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3880.

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This report investigates the down-aisle buckling load capacity of steel storage rack uprights. The effects of discrete torsional restraints provided by the frame bracing in the cross-aisle direction is considered in this report. Since current theoretical methods used to predict the buckling capacity of rack uprights appear to be over-conservative and complex, this research may provide engineers an alternative method of design using detailed finite element analysis. In this study, the results from experimental testing of upright frames with K-bracing are compared to finite element predictions

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Koen, Damien Joseph. "Structural Capacity of Light Gauge Steel Storage Rack Uprights." University of Sydney, 2008. http://hdl.handle.net/2123/3880.

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Master of Engineering (Research)<br>This report investigates the down-aisle buckling load capacity of steel storage rack uprights. The effects of discrete torsional restraints provided by the frame bracing in the cross-aisle direction is considered in this report. Since current theoretical methods used to predict the buckling capacity of rack uprights appear to be over-conservative and complex, this research may provide engineers an alternative method of design using detailed finite element analysis. In this study, the results from experimental testing of upright frames with K-bracing are com

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Talebian, Nima. "Upright Frame Shear Stiffness and Upright Biaxial Bending in the Design of Cold-Formed Steel Storage Rack-Supported Buildings." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/381685.

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Steel storage racks are commonly used worldwide to store goods on pallets and represent freestanding structures to design. Recently, a new type of storage systems has gained popularity in which the rack system supports both the building enclosure and the stored goods. These new rack structures are referred to as “rack-supported buildings” or “clad racks”. Due to combined actions of wind loading and stored pallets, uprights undergo a combination of biaxial bending and compression. Existing design rules may not be adequate for this type of combined loading. Furthermore in clad racks, as the oute

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Freitas, Márcio Felix de. "Ligações metálicas constituídas por parafusos auto-atarraxantes." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-22032016-101755/.

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O emprego de parafusos auto-atarraxantes em ligações metálicas, nos últimos anos, têm aumentado de forma significativa, principalmente como dispositivo de ligação entre componentes leves da construção metálica, como por exemplo, nas ligações entre telhas metálicas e terças. Tais ligações apresentam modos de falha diferentes dos observados para as ligações parafusadas convencionais, em função do tipo de parafuso e das reduzidas espessuras dos elementos conectados, definidos como \"pull-out\" e \"pull-over\". No Brasil, a carência de estudos específicos nesse tema foi uma das razões da omissão d

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Mendes, Cristiane Lopes. "Estudo teórico de perfis formados a frio em situação de incêndio." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-05042016-134851/.

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Com a publicação das normas NBR 14323:1999 Dimensionamento de estruturas de aço de edifícios em situação de incêndio e NBR 14432:2000 Exigências de resistência ao fogo de elementos construtivos de edificações, despertou-se, ainda mais, a preocupação com o dimensionamento das estruturas em caso de incêndio. Quando o aço é exposto a altas temperaturas apresenta reduções na resistência ao escoamento e no módulo de elasticidade. Em função dessas reduções, a NBR 14432:2000 apresenta tempos requeridos de resistência ao fogo, com os quais, pode-se optar pelo dimensionamento da estrutura, apresentado

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Júnior, Enio Carlos Mesacasa. "Comportamento estrutural e dimensionamento de cantoneiras de aço formadas a frio submetidas à compressão." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-17052012-093741/.

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Envolto ao já conhecido comportamento de cantoneiras esbeltas de abas iguais, questões aparentemente contraditórias tem sido reportadas em estudos experimentais de diversos autores, entre elas a ocorrência de modos de instabilidade em desacordo com aqueles obtidos via análise de estabilidade elástica, e forças axiais resistentes muito diferentes dos resultados teóricos (em geral, conservadoramente). Nestas condições, este trabalho procura analisar a fundo o comportamento das cantoneiras esbeltas de abas iguais, de modo a contribuir com o entendimento dos fenômenos que dificultam a interpretaçã

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Javaroni, Carlos Eduardo. "Perfis de aço conformados a frio submetidos à flexão: análise teórico-experimental." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-11122017-112750/.

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Atualmente, os perfis de chapa dobrada têm encontrado intensa aplicação como elementos estruturais nas construções em aço e como consequência, estão sujeitos aos mais diversos tipos de carregamentos. Este trabalho apresenta os aspectos gerais do dimensionamento de perfis de chapa dobrada submetidos à flexão enquanto utilizados como vigas propriamente dito e, também, enquanto utilizados como terças. Analisam-se seções tipo U, tipo U enrijecido e tipo Z enrijecido. Os ensaios em perfis fletidos foram realizados sobre 3 diferentes condições de carregamento, com dois vãos distintos, em um total de

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Maia, Wanderson Fernando. "Análise teórica e experimental de barras em dupla cantoneira de aço formada a frio submetidas à compressão." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-10102012-083428/.

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Barras compostas em dupla cantoneira são constituídas por duas seções idênticas dispostas paralelamente, afastadas entre si e ligadas uma a outra apenas em alguns pontos ao longo do comprimento, por meio de chapas separadoras. O sistema aqui apresentado é bastante utilizado, principalmente em estruturas treliçadas leves, no entanto, não existem estudos específicos sobre seu comportamento, como conseqüência as normas de cálculo não fornecem subsídios para o projeto desse componente estrutural. É relevante estudar o comportamento de barras em dupla cantoneira, já que neste caso, além dos modos d

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Neto, Alomir Hélio Fávero. "Terças em perfis de aço formados a frio com continuidade nos apoios: ênfase ao estudo das ligações de alma parafusadas com transpasse ou luva." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-07012014-142940/.

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Terças de aço formadas a frio são muito utilizadas em sistemas de cobertura e fechamento. Para conferir continuidade entre tramos adjacentes e possibilitar um melhor aproveitamento de material, são empregadas ligações parafusadas por transpasse e com luva. O comportamento estrutural dessas ligações é muito dependente da sua configuração geométrica e do nível de carregamento. Com base em uma série de nove experimentos e análises teóricas, o comportamento estrutural dessas ligações foi investigado no tocante aos esforços resistentes e à rigidez. Observou-se que o modo de falha tem sempre uma com

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Junior, Luiz Carlos Marcos Vieira. "Análise numérica do comportamento estrutural e da resistência de terças de aço restringidas pelas telhas." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-01102007-091559/.

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Terças e longarinas metálicas são geralmente projetadas no Brasil desconsiderando a interação com as telhas, ou seja, como barras isoladas, apesar da norma brasileira NBR 14762:2001 apresentar um procedimento de cálculo que leva em consideração tal interação (método do fator R). O comportamento estrutural do sistema terça-telha é complexo e a análise completa deve considerar a não-linearidade geométrica e física, bem como a influência do contato e da conexão terça-telha. Foram analisados modelos numéricos propostos na literatura e desenvolvido um modelo via método dos elementos finitos (MEF) q

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Chodraui, Gustavo Monteiro de Barros. "Flambagem por distorção da seção transversal em perfis de aço formados a frio submetidos à compressão centrada e à flexão"." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-18072003-124917/.

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Os perfis de aço formados a frio apresentam, em geral, elevada relação largura/espessura, tornando-os suscetíveis à flambagem local, caracterizada por uma flambagem de chapa, mas que também pode ocasionar um outro modo de flambagem, denominado flambagem por distorção, desconsiderado no dimensionamento de perfis laminados, mas que pode resultar crítico principalmente nos perfis com enrijecedores de borda e constituídos por aço de elevada resistência mecânica. Tal fenômeno é caracterizado pela perda de estabilidade do conjunto formado pelo elemento comprimido e seu enrijecedor de borda, alterand

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Almeida, Saulo José de Castro. "Análise numérica de perfis de aço formados a frio comprimidos considerando imperfeições geométricas iniciais." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-03122007-093434/.

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O presente trabalho apresenta proposta de análise numérica de perfis de aço formados a frio submetidos à compressão centrada. Trata-se de investigação, realizada por meio de elementos finitos, com vistas à análise da influência de imperfeições geométricas iniciais presentes em perfis U simples e U enrijecido, sob os aspectos de sua forma, magnitude e sentido. A imperfeição geométrica é adotada na forma de modos de falha local, global e distorcional, observando a suscetibilidade a tais modos para a seção de interesse. Cada tipo de imperfeição é avaliado de forma isolada e, em seguida, de forma

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Bolandim, Emerson Alexandro. "Análise de confiabilidade em ligações parafusadas em chapas finas e perfis de aço formados a frio." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-27062011-140302/.

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Este trabalho apresenta uma investigação de modelos analíticos de previsão da força de tração resistente para ligações parafusadas em chapas finas e perfis de aço formados a frio, de acordo com quatro especificações de projeto (ABNT NBR 14762:2010, ANSI AISI S100:2007-S, AS/NZS 4600:2005 e EUROCODE 3 Parte1.3:2010). O estudo envolveu 404 resultados experimentais de ligações parafusadas, sendo: 232 ligações em chapas finas, 104 ligações em cantoneiras e 68 ligações em perfis U, em que diversas configurações geométricas foram analisadas. No total 1616 análises de força resistente foram realizada

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Baságlia, Cilmar Donizeti. "Sobre o comportamento estrutural de terças de aço considerando a interação com as telhas." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-06042016-104944/.

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Nos últimos anos tem sido observada uma significativa redução do uso das telhas pesadas nas edificações industriais, como as telhas de fibrocimento, por exemplo, e a preferência por telhas mais leves e que permitem maior racionalização da construção, como as telhas metálicas (aço zincado e alumínio). Assim, a fixação por meio de ganchos foi naturalmente sendo substituída por parafusos auto-atarraxantes, permitindo uma elevada eficiência estrutural da interação terça-telha, portanto, as terças que eram tratadas como elementos estruturais independentes passaram a ser projetadas com base no compo

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Gilio, Fernando Henrique Santana. "Terças de aço formadas a frio com continuidade nos apoios por meio de luvas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-06042016-111403/.

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Há basicamente dois sistemas empregados para promover a continuidade das terças de múltiplos vãos: transpasse e luva. Do ponto de vista do transporte e da montagem, o sistema de luvas é vantajoso em relação ao sistema de transpasse, uma vez que conduz a barras de menor comprimento. Entretanto, o emprego de luvas tem sido pouco explorado, devido principalmente ao pouco conhecimento sobre o comportamento estrutural do sistema e, consequentemente, pela ausência de recomendações de projeto disponibilizadas pelas normas e manuais técnicos. Neste trabalho foram analisadas a rigidez e a resistência d

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Silva, Julio Cesar Martins da. "Análise teórica-experimental de perfis de aço formados a frio devido à instabilidade por distorção na flexão." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-03062016-135325/.

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Apresenta-se neste trabalho um estudo teórico-experimental sobre a instabilidade de perfis formados a frio submetidos à flexão. A instabilidade distorcional se faz comum na presença de tensões de compressão atuando sobre perfis enrijecidos e fabricados com aços de elevada resistência mecânica. A parte teórica abrange os métodos de cálculo analíticos e numéricos para a análise de instabilidade distorcional de perfis de seção aberta formados a frio. Na parte experimental inclui-se o estudo de perfis formados a frio com seções do tipo U enrijecidos submetidos aos ensaios à flexão. Nestes ensaios

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Branquinho, Maria Ávila. "Sobre o comportamento estrutural e o dimensionamento de cantoneiras de aço formadas a frio submetidas à compressão e conectadas por uma aba." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-30032017-103451/.

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A cantoneira de abas iguais é encontrada laminada ou formada a frio. Quando laminada, normalmente possui abas compactas, isto é, se submetida à compressão, não apresenta instabilidade local e, para a faixa usual de comprimentos, não apresenta também o modo global de flexo-torção como dominante. Quando formada a frio, estes modos predominam, uma vez que a relação largura-espessura torna-se elevada. A elevada esbeltez das abas, juntamente com as peculiaridades do seu comportamento mecânico, pode conduzir a significativas divergências entre a força axial resistente (experimental) quando comparada

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Anapayan, Tharmarajah. "Flexural behaviour and design of hollow flange steel beams." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/36210/1/Tharmarajah_Anapayan_Thesis.pdf.

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The LiteSteel Beam (LSB) is a new hollow flange channel section developed by OneSteel Australian Tube Mills using a patented Dual Electric Resistance Welding technique. The LSB has a unique geometry consisting of torsionally rigid rectangular hollow flanges and a relatively slender web. It is commonly used as rafters, floor joists and bearers and roof beams in residential, industrial and commercial buildings. It is on average 40% lighter than traditional hot-rolled steel beams of equivalent performance. The LSB flexural members are subjected to a relatively new Lateral Distortional Buckling mo

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Abdel-Rahman, Nabil Mahmoud. "Cold-formed steel compression members with perforations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30065.pdf.

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N'emedi, Zsolt V. "Development of performance sections for cold-formed steel residential construction." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08222009-040502/.

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Kyvelou, Pinelopi. "Structural behaviour of composite cold-formed steel systems." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/50694.

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The topic of this thesis is the investigation of the structural behaviour of cold-formed steel flooring and purlin systems, taking into consideration the beneficial effect of interaction between structural components. Experiments have been conducted on flooring systems comprising cold-formed steel joists and wood-based particle boards, considering the typical screw fixings employed in current practice as well as alternative means of shear connection. The experimental findings showed that mobilisation of composite action within this type of system, through enhancement, beyond that currently use

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Huynh, Minh Toan. "Structural Behaviour of Cold-Formed Steel Screwed Connections." Thesis, The University of Sydney, 2020. https://hdl.handle.net/2123/22098.

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This thesis presents a study on the behaviour of connections using screws in cold-formed steel structures. The first part of the thesis studies the behaviour of the screw connectors using simple connection tests and Finite Element (FE) modelling. Specimens were assembled by using 2 or 3 screws connecting two cold-reduced sheet steels with various grades and thicknesses. Two types of limit states were investigated: (i) screw shear failure and (ii) bearing and tilting failure. A set of revised design equations for strength of screwed connections in bearing and tilting is proposed. A reliability

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Zhang, Jiahui, and 张佳慧. "Cold-formed steel built-up compression members with longitudinal stiffeners." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206457.

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In this study, the structural behaviour of cold-formed steel built-up compression members with longitudinal stiffeners was investigated by experiments and numerical simulation. The influence of different screw spacings on the ultimate strengths of built-up compression members was also investigated. In current design specifications, generally there are no direct and explicit design rules for cold-formed steel built-up sections. Therefore, design rules for built-up open sections and closed sections have been proposed. The test program was conducted for cold-formed steel built-up sections, whi

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Silva, Juliana Maria Mazzeti. "Terças de aço em perfis formados a frio com alma enrijecida: ênfase na força cortante e na interação momento fletor-força cortante." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-05062018-095440/.

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A utilização de aços de alta resistência em terças formadas a frio faz com que as espessuras sejam cada vez mais reduzidas e, como consequência, os fenômenos de instabilidade mais pronunciados. Para melhorar a eficiência estrutural, enrijecedores longitudinais podem ser inseridos na alma, aumentando a resistência em relação ao modo de instabilidade local. Ainda que a utilização de seções com alma enrijecida seja uma prática comum, os procedimentos adequados para seu dimensionamento são pouco abordados na literatura. O objetivo deste trabalho foi estudar o comportamento estrutural de terças for

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Padilla-Llano, David Alberto. "A Framework for Cyclic Simulation of Thin-Walled Cold-Formed Steel Members in Structural Systems." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/52904.

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The objective of this research is to create a computationally efficient seismic analysis framework for cold-formed steel (CFS) framed-buildings supported by hysteretic nonlinear models for CFS members and screw-fastened connections. Design of CFS structures subjected to lateral seismic forces traditionally relies on the strength of subassemblies subjected to lateral loading of systems, such as strapped/sheathed shear walls and diaphragms, to provide adequate protection against collapse. Enabling performance-based seismic design of CFS buildings requires computationally efficient and accurate m

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Leal, Davi Fagundes. "Sobre perfis de aço formados a frio compostos por dupla cantoneira com seção \"T\" submetidos à compressão." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-15072013-104844/.

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Atualmente, dentre os perfis de aço formados a frio (PFF) mais utilizados em sistemas estruturais correntes, merecem destaque aqueles compostos por duas cantoneiras ligadas entre si por meio de presilhas, apresentando seção na forma de \"T\". Embora tenha utilização bastante difundida, pouco se sabe sobre o comportamento estrutural deste tipo de perfil, principalmente em relação aos modos de instabilidade a ele associados. No presente trabalho, são desenvolvidos, com base em ferramentas disponibilizadas no código computacional ANSYS, modelos numéricos em elementos finitos com a finalidade de s

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Zhang, Hanwen. "Connections in cold-formed steel modular building structure systems." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8181/.

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Modular construction has been used for many years. Cold-formed steel with its advantages is commonly utilized in the modules. However, the challenge comes to the connections. Connections generally take substantial part of the expenditures. An easy erection and effective connection method could considerably achieve great cost saving and structural improvement. Current norms and specifications cannot cover the requirements in the design. This research investigated the connections in the cold-formed steel modular panel structure through experimental, analytical and numerical methods. FEMs were de

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Afshan, Sheida. "Structural behaviour of cold-formed stainless steel tubular members." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/23660.

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This thesis examines the behaviour of cold-formed stainless steel tubular structural members, with an emphasis on ferritic stainless steels. Owing to the high comparative expense of stainless steel relative to traditional carbon steel, this study aims to identify and develop means of utilising the material more efficiently. A comprehensive material test programme was carried out as part of an extensive study into the prediction of strength enhancements in cold-formed structural sections that arise during production. Material tests on a total of 51 flat coupons and 28 corner coupons, extracted

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Ganesan, Karthik. "Resistance Factor for Cold-Formed Steel Compression Members." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/33694.

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This research investigates if the LRFD strength reduction factor for cold-formed steel compression members can be increased above its current value of Ï c = 0.85, which was established by the LRFD Cold-Formed Steel Design Manual (1991) on the basis of 264 column tests. The resistance factor in the Canadian code for cold-formed steel compression members is also evaluated. A total of 675 concentrically loaded plain and lipped C-section columns, plain and lipped Z-section columns, hat and angle columns, including members with holes, are considered in the study. The predicted strengths are calcula

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