definition
strict definition
tube-in-tube
A system which combines an exceptionally strong perimeter frame with a similar tube at the core.
Pictured: Hancock Whitney Center
A tube-in-tube structural system employs the same principle as the framed or trussed tube, but with one such tube at the building's core supplementing and reinforcing another at the perimeter.
The system has an inner structural tube at the core and an outer tube around the perimeter. The core tube supplements the force-resisting action of the outer one.
This inside-and-outside arrangement distinguishes it from several tubes bundled together. An ordinary central core without the tube action described here does not by itself establish a tube-in-tube system.
tube-in-tube Photos
Related definitions
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bundled tube
A system in which multiple tube structures are clustered together for greater strength. -
buttressed core
A framing system with a strong central core reinforced by shear walls or other rigid elements radiating from it. -
core plus outrigger
A framing system in which a rigid core is tied to the perimeter with sturdy horizontal beams. -
framed tube
A system which resists lateral forces through a tightly interlocked perimeter frame. -
rigid frame
A framing system whose moment-resisting joints help the framework resist distortion. -
shear wall
A structural system using rigid vertical walls to resist distortion under lateral forces. -
shear wall plus frame
A system in which a strong slab wall acts in concert with strong joints to stabilize the frame. -
space truss
A three-dimensional truss with diagonal connections outside a single plane, used to resist lateral forces. -
superframe
A system in which multiple framed tubes are connected by horizontal framed trusses. -
trussed frame
A framework whose intersecting vertical and horizontal members are reinforced by one or more series of diagonal braces. -
trussed tube
A system in which the perimeter walls act as a rigid tube and are reinforced by vertical trusses.