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Design of Water Tank using SAP2000

By: Haseeb Jamal / On: Apr 02, 2017 / Design of, SAP2000
 
 
  • Unit = lb-ft.

New Model

  • Grid. Cylinder R= 5, θ = 9, z = 5. Along, r = 5.93, θ = 4.5, z = 13. Edit Z last value = 49.

  • Draw beams in 2nd storey.

  • Edit > Replicate parallel to Z-axis. Z = 13, number = 2.
  • Draw edge beam in 1st storey.
  • Select beams.
  • Edit > replicate parallel to z-axis. Z = 13, No.= 1

  • For ring beam.

Define > co-ordinate. t = 0, 11.25, 22.5 ............. 360

  • Draw one element on one grid line. Select it and replicate. Radial along Z-axis. θ = 11.25, No. 31.
  • Select all beams in this storey.
  • Select insertion point to center.
  • Draw single element of area.
  • Select area.

Assign > Area > Local axis, 5.625,

  • Select area and replicate 31 No & θ = 11.25
  • Tz plane select.
  • Draw walls.
  • Select walls.
  • Edit > auto mesh  1-2 = 2,  1-3 = 10

Define

  • Define > joint pattern, hydropath

  • Define > load cases. Name = hydro water pressure = type

  • Define frame section. Define B15 x 12, C12 x12
  • Define > area section. Slab, top slab, wall
  • Select beams, assign B 15 x 12
  • Select column assign C12 x 12
  • Select tank base, assign slab
  • Select wall

Assign

  • Assign > joint pattern hydropath, C = 1, D = -49
  • Select > get previous selection
  • Assign > area load > surface pressure, Load = hydro, face = 5. By joint pattern. Name = hydropath. Multipliers = 62.4
  • Add to existing load
  • Select slab. Assign load= 62.4 lb/ft2

Analyze

  • Analyze > run analysis, model “DO NOT RUN”
  • Display > show forces/stresses > hydro. Check it for hoop stress

Design (Design Check & Area of Steel)

  • Design > concrete frame design > display design combo. UDCON1, UDCON2
  • Design > concrete frame design > start design/check
  • Design > concrete frame design > verify all memberance passed
  • Design > concrete frame design > display design info
  • Select longitudinal reinforcement.

  • Design slab, top slab, wall by getting AST1, AST2, beams and columns.

 

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