Curved Elements in Bending: READ SEC 318 a curved element already has curvature before bending

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Curved Elements in BendingREAD SEC 3-18 a
curved element already has curvature before
bending
N.A. Neutral Axis, C.A. Centroidal
Axis, (area abovearea below) Straight Element
N.A.C.A Curved Element N.A. C.A.
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• Assumptions
• Pure Bending
• Linear Kinematics (plane sections remain plane
  small )
• Linear-Elastic Material

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Table 3-4 has formulae for rc and rn for
different CS shapes-note correction for I-beam