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Question
A hollow circular column of internal diameter 'd' and external diameter '1.5 d' is subjected to compressive load. The maximum distance of the point of application of load from the centre for no tension is
A.
d/8
B.
13 d/48
C.
d/4
D.
13 d/96
Answer ( Option B)

13 d/48

Solution

For a hollow circular column subjected to an eccentric compressive load, the condition for no tension anywhere in the section (i.e., load must lie within the "core" or "kern" of the section) gives the limiting eccentricity:

Where D = external diameter, d = internal diameter.

Given values:

• Internal diameter = d

   External diameter D = 1.5d

Derivation:

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