Foundation Design using SAFE

Objectives of challange: To know the general Design Procedure of spread Footing with SAFE software.

To know the general Design procedure of pile foundation with SAFE software.

Procedure:

Data Required for safe and analysis design.

Unfactored load = 2000/1.5 = 1333.3 KN.

Dead load break up = 1333.3/2= 666.7 KN.

Live load break up = 1333.3/2=666.7 KN.

Subgrade module for soil= safe bearing capacity x Factor to ultimate/maximum settlement.

=150x3/0.05=k=9000 kn/m3.

Rebar Yeild strength ( Fy)=500 N/MM2.

Rebar ultimate strength (Fu)= 575 N/MM2 (SAY).

Elastic modules of M25 concrete = 25000 N/mm2.

Now open SAFE software.

click on New model.

new model initialization

SELECT SINGLE FOOTING 

Defin materials 

M25 & HYSD415.

Define slab properties.

analyze the data

run analysis.

Safe bearing capacity under service load

9. Design the design strips

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 RESULTS FOR PART -1

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2. Data provided :

Data Required for safe and analysis design.

Unfactored load = 1175 KN.

Dead load break up =1175/2= 587.5 KN.

Live load break up = 1175/2=587.5 KN.

point spring of pile = A X E / L

=196349 X 25000 /16000=306796 KN/m.

K for SAFE analysis =306.8 kn/mm

Rebar Yeild strength ( Fy)=500 N/MM2.

Rebar ultimate strength (Fu)= 575 N/MM2 (SAY).

Elastic modules of M25 concrete = 25000 N/mm2.

Data Required for safe analysis and design.

No of piles required = unfactored load with self weight addition / individual pile capacity.

1175 x 1.1 /200 =6.5

consider 8 piles for symentrical placement of piles under pile cap.

Take centre to centre distance between piles  = 3 xpile diameter (1500mm)

Edge distance from pile centre = 1 x pile diameter (500mm)

Assumue pile cap depth =500mm.

Open new project with IS456:200 recommendation

2. Define the materials

3. Define the slab.

 

Using reference points, draw : piles, pilecap and column

 Assign the following

Run the analysis

 Check the punching shear

RESULT: All the following designs is done with reference of IS 29111- and SP34.