Exercise
Exercise (Based on the Footing Simulation web site)
Given the geometry of a footing, length = 6 m, width = 2 m, height = 0.5 m as well as its modulus of elasticity E = 21700000 kPa, analyze the response of the footing and the ground corresponding to different load and soil conditions.
A.
(1) Run the program using linear elastic spring model for a vertical concentrated force 3500 kN acting at the center of the footing. Assume ks, the modulus of
subgrade reaction, equal to 14000 kN/m3. Plot the settlement and the reaction force of the ground.
(2) Repeat above for ks = 0.5, 2, 5, and 10 times the ks used above. Comment on the effects of ks on bending moment of the footing and on settlement.
B.
(1) Set the number of segments to 10 and ks = 14000 kN/m3. Assuming a concentrated force 1000 kN acting at node 9, run the program using a linear elastic spring model.
(2) Repeat above for a concentrated force 1000 kN and a moment 1800 kN*m acting at node 6.
(3) Comment on the results.
C.
Repeat B(1) using footing height 0.2m and 0.8m.
D.
(1) Set the number of segments to 18 and ks = 14000 kN/m3. Assume two concentrated forces 1800 kN and 1500 kN acting at node 4 and 16 respectively
and two moments –100 kN*m and 100 kN*m which also act at node 4 and 16 respectively. Run the program using a linear elastic spring model.
E.
As you do this homework, you might have some ideas for additional useful exercises using this site. Please list some.
F.
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