Aggregate interlock — where it appears
Named by 2 essays across one field — each of them below, with the objects they name alongside it.
Also named here as clamping force, failure surface, shear friction — the same set of essays touches all of them, so they are one junction rather than several.
A check made on a perimeter, not on a section
Every shear check in this collection is made on a plane cut through a member. A slab sitting on a column has no such plane, because the shear leaves in every direction at once — so the check is made on a closed line, and a line grows with the column while the load grows with the square of the bay.
Shear across a crack that is already there
Every shear calculation in this collection starts from an uncracked solid — a principal stress, a shear flow, a diagonal tension. This one starts after the crack, on a plane with no tensile strength at all, and the coefficient it uses is not a coefficient of friction. It is the slope of the roughness.
Named alongside it
The objects these essays reach for when they reach for this one.
Clamping forceFailure surfaceShear frictionAnchorageColumn headConstruction jointControl perimeterCorbelCrackDilatancyEffective depthFlat slab