The conjugate frame analogy is extended to the treatment of continuous space frames. Fundamental relationships between the actual structure and the conjugate structure are derived for a general case, and then specialized for frames with straight members of constant cross-section. The latter are used for the derivation of simultaneous equations which, in conjunction with the static equilibrium conditions, yield the redundant quantities.
J. KIUSALAAS, S.L. LEE, and M. MAKINO