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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
 

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