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substitute structure

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A Non-Iterative Direct Displacement-Based Design Procedure for SDOF Steel Columns: Using Substitute Structure
Y.-Y. Lin, K.-C. Chang
Journal:

Journal of Mechanics / Volume 19 / Issue 3 / September 2003

Published online by Cambridge University Press:

05 May 2011, pp. 357-364

Print publication:

September 2003
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Traditionally, the yield displacement of a nonlinear structure was calculated by using the direct displacement-based seismic design method which usually requires a repeatedly iterative procedure no matter whether the substitute structure or inelastic design spectra has been adopted in the procedure. This will sometimes result in inefficiency if too many iterative cycles need to be produced in a design case for convergency. To avoid this disadvantage, this paper presents a non-iterative direct displacement-based design procedure for SDOF steel columns using the substitute structure approach. By combining the yielding property with the stiffness property of the designed steel columns, the procedure can immediately obtain the column's cross-section via the chosen target displacement and ductility ratio.