Redundant — where it appears
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
The arm that makes the columns work
The perimeter columns of a tall building are already there, already carrying gravity, and already the furthest thing from the centre. They take almost none of the overturning, because a floor slab transmits shear and not moment — and one storey-deep arm at the right height changes that by nearly a half.
The deflection that is a derivative
A structure's strain energy is one number. Differentiate it with respect to a load and out comes the displacement under that load — and the trick that makes it a method rather than an identity is that the load does not have to be there.
Named alongside it
The objects these essays reach for when they reach for this one.
CastiglianoCompatibilityComplementary energyCoreDeflectionDifferential shorteningDriftDummy loadFlexibilityLateral systemLinearityNumerical derivative