Page 53 - Unit2.docx
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Example 5.5
Concrete pile (0.235) ⋅ (0.235) cross-section installed in clay with
characteristic undrained shear strength of 22 kPa. In favourable condition.
C50. Determine design load of the pile. Consider failure in the material.
© It's Engg. Life
Solution:
ϕ ef = 2.3
l c /h = 20
k = 0.6, kϕ = 0.24, k = 0.62
c
s
f = 35.5 /(2.5⋅ 2.2) = 22.5 MPa
cc
f = 420/(2.25⋅ 2.2) = 324 MPa
st
Effective reinforced area:
FRd = µ m⋅ NU
µ = 0.9 ⇒ F Rd = (0.9)0.769 = 0.692 MN
m
Failure checking using the second formula:
