Question: The figure shows an idealized structure consisting of one or more rigid bars with pinned connections and linearly elastic springs. Rotational stiffness is denoted (R,

The figure shows an idealized structure consisting of one or more rigid bars with pinned connections and linearly elastic springs. Rotational stiffness is denoted (R, and translational stiffness is denoted (.
Determine the critical load Pcr for the structure.

PI BR

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