bundled tube
A system in which multiple tube structures are clustered together for greater strength.
Pictured: Southeast Financial Center
A bundled tube system employs more than one framed or trussed tube, clustered together to resist lateral forces. This adds strength to a structure, in the same manner that a bundle of straws is harder to bend than a single straw.
The constituent tubes are grouped so that their resistance to lateral forces works together. A framed tube, a trussed tube, or more than one of either form can supply the individual tube elements.
The arrangement differs from a tube-in-tube system, which places an inner tube at the core and an outer tube at the perimeter. Merely having several nearby towers does not establish a structural bundle.
bundled tube Photos
Related definitions
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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. -
tube-in-tube
A system which combines an exceptionally strong perimeter frame with a similar tube at the core.