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Theory of Structures - Engineering

Q1:

The eccentricity (e) of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 t for non-development of tension, is

A 2.75 cm

B 3.00 cm

C 3.50 cm

D 4.25 cm

E 5.0 cm

ANS:D - 4.25 cm

External diameter,D=25cm.
Internal diameter,d=15cm.
Eccentricity to avoid tension= (D^2+d^2)/8D.
=(25^2+15^2)/(8*25)=4.25cm.