TENSILE TENSILE STRUCTURESTRUCTURE
SUBMITTED BY: P.M.AMALViii-SEM,SOA ,IPS ACADEMY, INDORE
A tensile structure is a construction of elements carrying only tension and no compression or bending. Examples of this are cables supporting a membrane of fabric or some other sheet material, or a simple suspension bridge. The term tensile should not be confused with tensegrity, which is a structural form with both tension and compression elements.
Tension structure are form of structures in which members exclusively designed to carry tension are major elements in the overall structure. Most structural elements are able to carry bending forces as well as tension and compression, and are hence able to withstands reversals in the direction of loading. Tension elements are unique in that they can only carry tension. In compressive or bending elements the loading capacity is often reduced by buckling effects, while tension elements can work up to the full tensile stress of the material.
DEFINITIONDEFINITION
STRUCTURAL STRUCTURAL PrinciplesPrinciples
Tension structures consists of cables and fabric in Tension structures consists of cables and fabric in tension. The cables carry the gravity loads while tension. The cables carry the gravity loads while stability and resistance to wind uplift is provided stability and resistance to wind uplift is provided by the weight of the roof deck system. The most by the weight of the roof deck system. The most common type, the cable dome, consists of a common type, the cable dome, consists of a center tension ring surrounded by a number of center tension ring surrounded by a number of hoop rings which are also in tension, these are hoop rings which are also in tension, these are surrounded at the perimeter by a compression surrounded at the perimeter by a compression ring.ring.By definition, the membrane can only resist By definition, the membrane can only resist forces in tension, so forces perpendicular to the forces in tension, so forces perpendicular to the membrane cause large deformations and large membrane cause large deformations and large membrane forces. And this is explain by taking an membrane forces. And this is explain by taking an simple example,simple example,
COSTS
As a very rough rule of thumb fabric structures are nearly always cheaper than planar glazing and more expensive than polycarbonate solutions.
They really come into their own in large span structures such as the Millennium Dome where the ratio of fabric to steel results in considerable savings over more conventional structures.
For smaller structures under 100m2 they can be relatively design intensive, however there are often pre-engineered solutions which can fit a tight budget.
Some examples where Some examples where tensile structures are used tensile structures are used
very efficientlyvery efficiently
interiorsinteriors
Office areas as a false ceiling element to diffuse light
As a display in exhibition areas
As a partition in area like
restaurants
AtriumsAtriums
AtriumsAtriumsThese tensile
structure elements can also be used to accentuate the big
atriums
Bridges Bridges
AuditoriumsAuditoriums
Tensile structure element acting as top covered background
element
The tensile structure in folded plate form
spans large auditorium sapce
without any support
Open Air TheatersOpen Air Theaters
Can act as a temporary roof
covering in such areas in during day
StadiumsStadiums
The tensile structure shading sitting areas and large pavilions in stadiums
Swimming poolSwimming pool
Acting as a temporary
shading device
providing efficient lighting
conditions in such big
areas
Exhibitions , Petrol pumpsExhibitions , Petrol pumps
Roof topsRoof tops
Canopies , covered pathwaysCanopies , covered pathways
More examplesMore examples
More examplesMore examples
More examplesMore examples
More examplesMore examples
Some detailsSome details
Some detailsSome details
Some detailsSome details
Structural behaviorStructural behavior
Distribution loadsVertex positions
exampleexample
Distribution of forces
Formation and behavior
Some analysis methodsSome analysis methods
Nodal forces
Distribution forces