[ANSWERED] 1. How would you evaluate the circumferential strain, e y , at r = 0? What is this strain in terms..

1. How would you evaluate the circumferential strain, e
y
,
at r = 0? What is this strain in terms of the a’s given in Eq. (9.1.15). Hint:
Elasticity theory tells us that the radial strain must equal the
circumferential strain at r = 0.
2.
The soil mass in Figure P9–13 is loaded by a force
transmitted through a circular footing as shown. Determine the stresses in the
soil. Compare the values of s
r
using an axisymmetric model with the
sy values using a plane stress model. Let E = 3000 psi and n = 0:45 for the
soil mass.