Concept
Lower bound theorem — where it appears
2 essays name this object, across 2 fields. What follows is each of them, and the objects they name alongside it.
The property that appears in none of the equations
Ductility is in no design formula on this site. Every method on this site depends on it — and a brittle structure does not merely fail early, it makes the analysis wrong.
Where the structure meets the ground, and when the bolts start working
Push a base plate off its middle third and it lifts off the foundation. The holding-down bolts then carry exactly nothing, and go on carrying nothing until the plate has crushed the concrete underneath it.
Named alongside it
The objects these essays reach for when they reach for this one.
Base plateBearingBrittle fractureConnectionDuctilityEccentricityHolding down boltLoad pathMiddle thirdMoment redistributionNo tensionPlastic hinge