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5 This chapter covers the theory behind reduction of the cross-section.
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7 = Rectangular cross-section =
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9 b,,red,, = b - (δ,,V,, + δ,,H,,) a
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11 h,,red,, = h - (δ,,T,, + δ,,B,,) a
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13 = Plate section and hollowcore =
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15 h,,red,, = h - (δ,,T,, + δ,,B,,) a
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17 = Circular cross-section =
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19 d,,red,, = d - 2a
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21 = T-type cross-section and F-type cross-section =
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23 [[image:1590679169084-964.png]]
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25 h,,f,red,, = h,,f,, - (δ,,T,, + δ,,B,,) a,,flange,,
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27 b,,f,red,, = b,,f,, - (δ,,L,, + δ,,R,,) a,,flange,,
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29 As an approximation, b,,f,, increases/decreases according to the strength parameters between the flange and the body.
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32 [[image:1590679596338-934.png||height="43" width="221"]]
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34 = L-type cross-section =
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36 b,,red,, = b - (δ,,L,, + δ,,B,,) a,,body,,
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38 h,,red,, = h - δ,,T ,,a,,body,, - δ,,B,, a,,flange,,
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40 b,,f,red,, = b,,f,, - (δ,,L ,,a,,body,, + δ,,R,, a,,flange,,)
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42 As an approximation, b,,f,, increases/decreases according to the strength parameters between the flange and the body.
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44 [[image:1590679755751-392.png||height="49" width="319"]]
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46 For the entire cross-section the reduced parameters of the body are used.
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48 f,,cd,,(θ,,M,,) = k,,c,,(θ,,M,body,,) f,,cd,,
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51 E,,cd,,(θ,,M,,) = k,,c,,(θ,,M,body,,)^^2^^ E,,cd,,(θ,,M,,)
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PRE-Stress Documentation