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ISection3D

3D I-Section

arrangement

Syntax

Text Only
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section ISection3D (1) (2) (3) (4) (5) (6) (7) (8) [9] [10] [11]
# (1) int, unique section tag
# (2) double, top flange width
# (3) double, top flange thickness
# (4) double, bottom flange width
# (5) double, bottom flange thickness
# (6) double, web height
# (7) double, web thickness
# (8) int, material tag
# [9] int, number of integration points, default: 6
# [10] double, eccentricity along y axis, default: 0.0
# [11] double, eccentricity along z axis, default: 0.0

Remarks

  1. The flange/web is assumed to be slender. Thus, only one integration point is assigned across the thickness. The web, top flange and bottom flange share the same number of integration points over the height/width no matter how wide/tall the section is.
  2. If either flange thickness exceeds 10% of the web height, both flanges will use two integration point layers through their thickness.
  3. If the web thickness exceeds 10% of the larger flange width, the web will use two integration point layers through its thickness.

See Eccentricity for more details.