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Design of Transmission Tower in SAP2000

By: Haseeb Jamal / On: Apr 26, 2017 / SAP2000, Design of
 
 
  • D.L = 30K, L.L= 35k, on top most joint in gravity direction
  • Unit = k-ft
  • New model = 3D truss.

Transmission Tower

S. No Elevation Wud in a (H) b (W)
1 0 40 0 0
2 16 32 0.3 0.3
3 32 24 0.3 0.3
4 48 16 0.3 0.3
5 64 8 1 1
6 72 8 0 0
7 80 8 0 0
8 88 8 0 0

Chord = W18 x 35 Braces = W 18 x 35

Define:

  • Define > material, steel, modifying fy = 36 ksi. Fx = 58ksi.
  • Define > load cases add D.L & in L.L
  • Self wt =0
  • Define > add default combo select steel & convert to user check boxes.
  • Select top most joints.

Assign

  • Assign > Joint loads> forces apply loads.
  • Select all.
  • Assign > frame> release/Partial fixity, check m33 both check boxes.

Analyze

  • Analyze >select analysis option. Select 3D trauss.
  • Display > show forces> frames. Select UDSTL2 & axial force. Uncheck fill , check show values, check boxes and view the values on top most and bottom most members
 
Let us know in the comments what you think about the concepts in this article!

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