Wood method

The Wood method, also known as the Merchant–Rankine–Wood method, is a structural analysis method which was developed to determine estimates for the effective buckling length of a compressed member included in a building frames, both in sway and a non-sway buckling modes.[1][2] It is named after R. H. Wood.

According to this method, the ratio between the critical buckling length and the real length of a column is determined based on two redistribution coefficients, η 1 {\displaystyle \eta _{1}} and η 2 {\displaystyle \eta _{2}} , which are mapped to a ratio between the effective buckling length of a compressed member and its real length.

The redistribution coefficients are obtained through the following expressions:

η i = K c + K i K c + K i + K i 1 + K i 2 , i = 1 , 2 {\displaystyle \eta _{i}={\frac {K_{c}+K_{i}}{K_{c}+K_{i}+K_{i}1+K_{i}2}},\quad i=1,2}

where K i {\displaystyle K_{i}} are the stiffness coefficients for the adjacent length of columns.

Although this method was included in ENV 1993-1-1:1992, it is absent from EN 1993-1-1.

See also

  • EN 1993
  • Merchant–Rankine method
  • Horne method

References

  1. ^ Wood, R. H. (1974). "Effective Lengths of Columns in Multi-Storey Buildings. The Struct. Eng., Vol. 52, 7". pp. 341–346.
  2. ^ Simões, Rui (2007). Manual de Dimensionamento de Estruturas Metálicas. CMM – Associação Portuguesa de Construção Metálica e Mista. p. 119. ISBN 978-972-98376-9-2.


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