Foundation Design using SAFE
AIM:
- To Analyze and designthe isolated footing from week 11 challenge on SAFE
- To verify the size, depth and steel provided as per calculations.
INTRODUCTION:
- CSI SAFE (Slab Analysis by the Finite Element Method) is the best tool for designing concrete slabs and foundations.
- SAFE provide easiness to engineer towards the safe design of structures with powerful tools like draw, analyze, design and detailing etc.
- Laying out models is quick and efficient way with the user-friendly drawing tools, or user can import model from AutoCAD or loading conditions from other software's like CSI ETABS and CSI SAP2000.
PROCEDURE:
STEP: 1
Open the SAFE Application.
select New Model.
followed by Input Settings
Units was selected as Metric and Code IS 456-2000.
Single Footing,
Subgrade Modulus = F.O.S X S.B.C = 3x150
Settelment 0.05
= 9000KN/m^3
The compression axial load for the load combination (1.5DL+1.5LL) 2000KN
UNFACTORED LOAD = 2000/1.5 = 1333.3 KN
Footing thickness 800mm.
STEP: 2
Define materials.
- add M25 Concrete.
- Add rebar Fe500.
Material Property data:
Click define followed by Material properties
M25 grade of concrete
Modulus of elasticity,
E = √25 X 5000
= 25000N/mm²
STEP: 3
Define slab properties.
- define properties for mat.
- define properties for stiff.
STEP: 4
Define Load pattern.
STEP: 5
Define soil subgrade modulus.
STEP:6
Assign point load.
STEP: 7
Assign load combinamtions.
STEP: 8
check design preference (min cover 50mm).
STEP: 9
Run analysis and design.
RESULT:
HENCE, THE ISOLATED FOOTING WAS DESIGNED AMD ANALYIZED IN SAFE SUCCESSFULLY.
AIM:
- TO MODEL ANALYSI, 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
INTRODUCTION:
- CSI SAFE (Slab Analysis by the Finite Element Method) is the best tool for designing concrete slabs and foundations.
- SAFE provide easiness to engineer towards the safe design of structures with powerful tools like draw, analyze, design and detailing etc.
- Laying out models is quick and efficient way with the user-friendly drawing tools, or user can import model from AutoCAD or loading conditions from other software's like CSI ETABS and CSI SAP2000.
PROCEDURE:
GIVEN DATA:
STEP: 1
Open the SAFE Application
select New Model
followed by Input Settings,
Units was selected as Metric and Code IS 456-2000.
50mm each was provided as cover at top and bottom and Bar size was defined as 16mm
STEP: 2
Coordinates was defined next.
Grid spacing in X direction and Y direction was taken as 2.9m and 1.65m
respectively.
It's shown in the below figure too.
STEP: 3
Material Property data:
- Click define followed by Material properties
- M25 grade of concrete
- Modulus of elasticity,
E = √25 X 5000
= 25000N/mm²
- Fe 500 Rebar was added next as shown below.
STEP: 4
Define slab properties.
- define pile cap.
- Define column.
- Define pile details.
STEP: 5
Draw the slab by using quick draw tool.
draw points
STEP: 6
Add piles at the point.
modify the edge distance to 0.3m.
STEP: 7
Create a column of 600mm x 600m.
draw the column in center using quick draw tool.
STEP: 8
Springs were added.
select pile> assign > support data > point springs
Springs constant is taken frome above calculation.
Dead and Live Load of 587.5KN are added next.
STEP: 9
Load case combination was defined next.
After defining the load combination run the analysis
max displacment was found to be .84
so its safe.
Also, all the Punching shear values are less than 1
so its safe.
joint reaction diagram
as all the reaction forces are according to the limit,
its safe.
Reinforcement details are added next as shown in both X and Y direction respectively and run the analysis again.
STEP: 10
Reinforcement slab design:
pile cap foundation design:
RESULT:
Complete design of pile cap foundation using SAFE software.
