Foundation Design using SAFE

AIM: Model the isolated footing provided in week 11 challenge on SAFE. Analyze and design it to verify the size, depth and

OPEN SAFE SOFTWARE

GO TO NEW MODEL

LOAD ON COLUMN

DISPLACEMENT LESS THAN 25 MM, OK

DESPLACEMENT LESS THAN 25MM UNDER ULTIMATE LOAD CONDITION , OK

PUNCHING SHEAR LESS THAN I ,SO ,OK

SOIL PRESSURE MORE THAN 150KN/MM2 ,SO FAIL

INCREASE THE DEPTH OR INCREASE THE DIMENSION OF FOOTING.

SO REVISED THE FOOTING DIMENSION 200 MM IN ALL SIDES

SOIL PRESSURE UNDER 150KN/MM2 ,SO OK

PUNCHING IS OK

STRIP SHOULD BE COVERED ALL AREAS

AREA OF STEEL 1218 MM2 AT BOTTOM LAYER X DIRECTION

AREA OF STEEL 822MM2 AT BOTTOM LAYER IN Y DIRECTION

Q2

AIM: TO DESIGN PILES FOOTING BY SAFE.

GIVEN DATA:

COLUMN SIZE 600X600

UNFACTORED GRAVITY LOAD =1175 KN

DL=587.5 KN

LL = 587.5 KN

LENGTH OF PILES= 16M

DIAMETER OF PILES= 500MM

CAPICITY OF EACH PILE =200KN

FIND OUT

A. PILE GROUP

B. DEPTH OF PILE CAP

C. REINFORCEMENT IN TOP AND BOTTOM

NO OF PILE REQUIRED= TOTAL AXIAL LOAD X1.1 /EACH LOAD CAPACITY

1175X1.1/200=6.47 TAKE = 8 NO

MINIMUM DISTANCE BEETWEEN TWO PLILES= 3 TIMES DIA OF PILES= 3X500=1500MM C/C

DISTANCE FROM EDGE TO THE CENTER OF COLUMN= 250 + 250= 500 MM

AFTER RUN ANALYSIS

PUNCHING LESS THAN 1 SO ,OK

REACTION ,OK

MAXIMUM BOTT STEEL= X DIRECTION =1135 MM2

Y DIRECTION= 1225MM2

TAKING AREA OF STEEL 2000MM2

PROVIDE 18NO #12@220 IN BOTH DIRECTION