Question: ( 3 5 % ) The buckling equation for the column shown in Figure 3 , where R denotes the stiffness of the rotational spring

(35%) The buckling equation for the column shown in Figure 3, where R denotes the stiffness of the rotational spring at end B, is given as:
RLEI(kLcotkL-1)-k2L2=0.
(a) Derive the buckling equation. [ Hint: introduce B and find the support reactions]
(b) Determine the critical load for the case where R.
re 3
( 3 5 % ) The buckling equation for the column

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