Foundation Design using SAFE
1. AIM: To Analyse and model Isolated footing as per calculations by using SAFE.
Procedure:
Step 1:
- Open SAFE software
- Set the units as per requirement
Step 2:
- Select structural object
- Click on Custom grid spacing
Step 3:
- Enter the distance along the directions and slab thickness
Step 4:
- View of footing as per grid data
Step 5:
- Go to define select material properties
Step 6:
- Add materials(concrete)
Step 7:
- Similarly add material(steel)
Step 8:
- Add slab properties and modify as footing
Step 9:
- Add slab properties and modify as stiff1
Step 10:
- Go to define select load patterns
Step 11:
- Go to define select load combinations
Step 12:
- Click on 3D view
Step 13:
- Run the analysis
Step 14:
- Click on punching shear Design/Check
Step 15:
- Reinforcement in both directions
RESULT: Isolated footing is designed using SAFE.
2. Aim: To design the pile cap on SAFE and to evaluate pile group to be used, depth of the pile cap, longitudinal steel on top and bottom face in both directions.
Procedure:
Pile length = 16m
Diameter = 500mm
SBC = 200KN
M25 grade concrete
Column size = 600mm*600mm
Axial load = 1175 KN
No.of piles = axial load/capacity of single pile = 1175/200 = 5.8 = 6piles
Spring constant = EA/L = 25000*3.14*500*500/16000 = 306795
Min spacing between pile = 2.5*500 = 1250mm
Edge spacing = 200mm
Step 1:
Step 2:
- Design preferences
Step 3:
-
select grid option x direction 2900mm, y direction 1650mm
Step 4:
- View as per grid data
Step 5:
- Add materials
Step 6:
- Add slab properties
Step 7:
- Slab is added to model
Step 8:
- Draw points
Step 9:
- Add piles 200mm
Step 10:
- Draw column of 600*600mm
Step 11:
- Add springs(spring constant)
Step 12:
- Loads are added(dead+live)
Step 13:
- Select rebar material in load cases
Step 14:
- Add load combination data as COMBO
Step 15:
- Run the analysis
Step 16:
- Punching shear design capacities
Step 17:
- Forces acted on it Joint reaction diagram
Step 18:
- Run analysis
Result: Pile cap foundation is designed using SAFE software.
Note: Copied from live session challenge