Foundation Design using SAFE

AIM-

• TO model the isolated footing provided in week 11 on safe
• to analayzwe and design it to verify the size
• to model the pile cap on safe.

PROCEDURE

step 1

• open safe software
• click on the new model

STEP 2

• once you click on new model
• a following dialog box will opwn
• provide the neccery data

step 3

• once you click okey
• model templete box will open
• click on single footing

step 4

enter the dimension as per the calculation we have done in week 11 challlenge

step 5

• once you click ok
• you will see the geometry is created in model spaces as follos

step 6

• now we have add material properties
• click on define
• click on add new material
• one you click add new material add the following parameter

click on ok

similerly add the rebar properties

step 7

now we have to define slab properties

as we already define slab properties in grid section

step 8 now we have to assign soil properties

define soil properties

STEP 9

now we have to cheak if load are defined or not

STEP 10

NOW we have to define the load combination

for that define- load combination

STEP 11 -

• NOW RUN the model
• click on the run analysis
• save rhe file
• now you will see the displacement
• click on deformed shape - selct combination as - SLS and see displacement
• as displacement is - 12 mm which is less than 25mm ...safe
• 
• cheak for punching shear
• click on diplay - punching shear
• as we can see that punching shear is less then 1
• 0.956<1 ... safe
• 

CHEAK FOR DIPLACEMENT

FIND OUT AREA OF REINFORCEMENT

RESULTS

• isolated footing is designed for square column of size 400*400mm
• we have to provide footing size as 4m*4m
• bearing soil pressure is cheaked and found ro be safe
• punching shear rtio is cheak and found to be safe

Q 2)

AIM- to model analyse and design the pile cap on safe

PROCEDURE-

step 1.

step 1

• open safe software
• click on the new model

STEP 2

• once you click on new model
• a following dialog box will opwn
• provide the neccery data

step 3

• once you click okey
• model templete box will open
• 
• click on grid only
• enter no of grids in x directiom and y = 2
• enter spacing in x = 3.1m
• enter spacing in y = 1.85 m
• 
• 
• S

STEP 5

now we have to assign the material

define - material properties

click on add new mmaterail

STEP 6

• now we have to define slab properties
• in pile cap we have to define 3 slabs
• footing
• for column
• for pile cap

step 7.

• once slab properties are defined
• now we have to start the modelling
• select quick draw slab option
• draw the slab select footing as property

step 9

• now we have to add column slab
• click on quick draw area
• slect the property
• draw the cloumn
• draw pile cap

step 10

• now we have to add spring to the pile beacause it behave like a spring
• click on assign - suppot data- point spring
• spring constant from above calculation is taken as
• add sproing constant - 306795kn/m
• select compressive only

step 11

• now we to add the load
• go to assign - joint load - point load
• assign 587.5 kn live load

step 12

now we have to add load combination

define - load combination

define the load combination as follow

step 13

• now run the model
• click on run analysis
• we found that dispalcement is less than allowable settlement

step 15 cheak for punching shear

joint reaction

results

• pile cap designed for square column of size 600mm*600mm
• we have to provide pile cap size as 3.1*1.85m
• bearing soil pressure is cheaked and found to be safe
• punching shear ration is cheak and found to be safe .