Foundation Design using SAFE
1)Aim:
- To Analyze and designthe isolated footing from week 11 challenge on SAFE
- To verify the size, depth and steel provided as per calculations.
Procedure:
- Subgrade modulus = SBC X FOS/Settlement = 150x3/0.05 = 9000kn/m^3
- Unfactored load = 2000/1.5 =1333.3 kn
- Dead load = 1333.3/2 = 666.7 kn
- Live load = 1333.3/2 = 666.7 kn
Open SAFE software.
Define the material
Define slab properties
Assign soil property to the footing slab
Define load combinations
Run the model
The results are provided
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2.
Aim:
To model analyze and design the pile cap on SAFE.
To evaluate the following:
- Pile group to be used
- Depth of pile cap
- Longitudinal steel on top and bottom face in both directions
Procedure:
Given data:
Column size: 600x600
Unfactored load: 1175KN
Pile length: 16m
Pile diameter: 500mm
Load on each pile: 200KN
Calculations:
Spring constant: EA/L
Young's modulus E = 5000 x fck
A = (`pi`/4) x d^2
L = 16m
Spring constant = 306.795N/mm
- Open SAFE application
Grid is created.
Define material property
Define rebar
Define slab property
Draw slab
Draw points for pile and column
Draw pile cap
Draw column in pile
Add spring constant value to pile
Define load
Run analysis and design
Deformed shape:
Joint reaction diagram:
Punching shear capacity ratio:
Add design strips:
Design in X direction
Design in Y direction:
Reinforcement slab design:
X direction
Y direction
Both X and Y:
3D view:
Result:
Hence, Completed the design of the pile cap foundation using SAFE software. The results of each drawing drawn in SAFE are attached.