Unformatted text preview: CES 4141  Stress Analysis Spring 2000
HW #4 assigned 28/00, due 2/113‘00 Problems 1 — 3) Use stiffness by deﬁnition to derive thestiﬂhess matrix for the three structures below: For each problem: 3) Draw the deﬂected shapes as a unit displacement at each D.O.F. in turn, holding all other D.O.F. = 0 b) Find the stiffness for the structure (the forces required to hold these deﬂected shapes) using slope deﬂection
equations (parts a and b together are called stiffness by deﬁnition) r2
m m T‘) K =
. K. II I E A B 2x2 ...
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 Spring '08
 Lybas

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