Shape Optimisation of Cold-Formed Steel Cross-Sectional Profiles With or Without Manufacturing and Assembly Constraints
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Author(s)
Primary Supervisor
Guan, Hong
Gilbert, Benoit
Year published
2017
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Cold-formed steel (CFS) members are extensively used in construction industry as the primary and/or secondary load-bearing structural systems. CFS products can be mass manufactured at room temperature and rapidly installed on-site. Compared to the traditional hot-rolled steel and concrete structures, CFS structures have a high capacity-to-weight ratio and present real benefits and opportunities for architects and engineers to achieve a greener structural solution. CFS products are typically formed by bending steel sheets or strips (up to 6 mm thick) using a number of rollers (roll-forming) or die blocks (brake-pressing). The ...
View more >Cold-formed steel (CFS) members are extensively used in construction industry as the primary and/or secondary load-bearing structural systems. CFS products can be mass manufactured at room temperature and rapidly installed on-site. Compared to the traditional hot-rolled steel and concrete structures, CFS structures have a high capacity-to-weight ratio and present real benefits and opportunities for architects and engineers to achieve a greener structural solution. CFS products are typically formed by bending steel sheets or strips (up to 6 mm thick) using a number of rollers (roll-forming) or die blocks (brake-pressing). The current manufacturing process allows the CFS products to be shaped into any desired (infinite) cross-sectional shapes with consecutive manufacturing bends. However, most of the commonly used CFS cross-sectional shapes are mainly restricted to “Cee”, “Zee” and “Sigma”. To address the issue of local instabilities, the conventional cross-sections have been improved by the inclusion of web and/or flange stiffeners and the optimisation of their dimensions (height, width and thickness). Despite these advances in cross-sectional design, little research has been done to discover new cross-sectional shapes to achieve an optimum solution. A revolutionary innovation in the crosssectional shape of the CFS products is therefore being pushed forward in this research.
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View more >Cold-formed steel (CFS) members are extensively used in construction industry as the primary and/or secondary load-bearing structural systems. CFS products can be mass manufactured at room temperature and rapidly installed on-site. Compared to the traditional hot-rolled steel and concrete structures, CFS structures have a high capacity-to-weight ratio and present real benefits and opportunities for architects and engineers to achieve a greener structural solution. CFS products are typically formed by bending steel sheets or strips (up to 6 mm thick) using a number of rollers (roll-forming) or die blocks (brake-pressing). The current manufacturing process allows the CFS products to be shaped into any desired (infinite) cross-sectional shapes with consecutive manufacturing bends. However, most of the commonly used CFS cross-sectional shapes are mainly restricted to “Cee”, “Zee” and “Sigma”. To address the issue of local instabilities, the conventional cross-sections have been improved by the inclusion of web and/or flange stiffeners and the optimisation of their dimensions (height, width and thickness). Despite these advances in cross-sectional design, little research has been done to discover new cross-sectional shapes to achieve an optimum solution. A revolutionary innovation in the crosssectional shape of the CFS products is therefore being pushed forward in this research.
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Thesis Type
Thesis (PhD Doctorate)
Degree Program
Doctor of Philosophy (PhD)
School
Griffith School of Engineering
Copyright Statement
The author owns the copyright in this thesis, unless stated otherwise.
Item Access Status
Public
Subject
Cold-formed steel
Load-bearing structural systems
Shape optimisation of cold-formed steel columns