3D Frame Analysis using SAP2000

Watch Videos on How to design a 3D Frame - Part 1 | Part 2 in SAP2000

• D.L = 20 lb/ft, L.L = 60lb/ft,
• Fy = 60 ksi, fc' = 4ksi
• B1 = 18” x 12”,
• C1 = 12” x 12”.

Steps:

• Unit = Kft-F

• New model= grid,
  • x = 4,
  • y = 1,
  • z = 4
  • Edit
    • x = 0, 20,35,40,
    • y = 0
    • Z = 0, 2,18, 23.

Watch Videos on How to design a 3D Frame - Part 1 | Part 2 in SAP2000

Draw > draw frame & draw the frame.

• Option Preferences
  • Concrete ACI-2003

• Define > material,
  • concrete,
  • Modify,
  • fy= fys=60ksi,
  • f’c= 4ksi.

• Define > frame sections.
  • Add rectangular sections,
  • Name= B1,
  • Depth= 18”,
  • width =12”,
  • Reinforcement, click beam button clear cover top=Bottom=2.5”

• Define > frame section.
  • Add rectangular section,
  • Name= C1,
  • Depth=12”,
  • width =12”,
  • Reinforcement, click column button, clear cover= 2.5, click design button.

• Define > load cases,
  • Add line load.

• Define > add default combo, check concrete.
  • Cover to uses check boxes.

• Select beams.

Assign > frame

• Frame sections,
• Select B1.
• Select columns.

• Assign > frame
  • Frame section,
  • Select C1

• Select Beams.

• Assign > frame load
  • Distributed,
  • Load case = dead,
  • select= gravity projected direction.
  • Wu = 0.02k/ft.

• Select > get previous select.

• Assign > frame load >
  • Distributed. Load case = live,
  • select gravity projected direction.
  • Wu = 0.06 K/ft.

• Select extreme left column.

• Assign > frame loads > point.
  • Direction = x,
  • select relative radio button.
  • X= 0.5,
  • Load= 10k.

• Select extreme left support.

• Assign > Joint
  • Restrained,
  • Select fixed support.

• Select middle support & select roller support.

• Select > Get Previous selection.

• Assign > Joint
  • Load case,
  • Y= -30.

• Analyze > Analysis case,
  • x-z plane.

• Analyze > Run analysis,
  • Select model.
  • Click “DO NOT RUN” button,
  • “RUN NOW , button.

• Display > deformed shape;
  • select UDCON2.

• Display > show forces/stress
  • frame,
  • select UDCON2

• Select F22,
  • Uncheck full,
  • Check show values.

• Display > show forces > stress
  • Frame,
  • Select M22 > Joints
  • Select UDCON2.

• Design > concrete frame design > select design combo.
  • Select UDCON1, UDCON2.

• Design > concrete frame design
  • Start design check.

• Design > concrete frame design
  • Verify all members posed.

• Design > concrete frame design> display design info.

• Select longitudinal reinforcement.

• For beams, select max, upper & lower value, and for column, select max. Value. Do calculation and find No. of Bars.