PNEUMATIC

ADVANCED CONSTRUCTION TECHNIQUES

Pooja Gaur 12603 Niharika Mathur 12614 Kajal Kiran 12633 Anjali Kumari 12644

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STRUCTURE

“The fascination of pneumatic structures begins with the fascination of the sky.”

Introduction:-• Pneumatic structure,  Membrane structure  that is stabilized by the  pressure of

compressed air.

• Air-supported structures are supported by internal air pressure.

• A network of cables stiffens the fabric, and the assembly is supported by a rigid ring at the edge.

• The air pressure within this bubble is increased slightly above normal atmospheric pressure and maintained by compressors or fans.

• Air locks are required at entrances to prevent loss of internal air pressure.

• Air-supported membranes were first devised by Walter Bird in the late 1940s and were soon put to use as covers for swimming pools, temporary warehouses, and exhibition buildings.

• Air-inflated structures are supported by pressurized air within inflated building elements that are shaped to carry loads in a traditional manner.

• Pneumatic structures are perhaps the most cost-effective type of building for very long spans.

The first radome prototype(1948). Walter Bird stands on top

• Pneumatic structure is a membrane which carries load developed from the tensile stresses. Its

stabilization is done by prestressing the membrane either by:-

applying an external force which pulls the membrane taut internal pressurizing if the membrane is volume enclosing

Its principle is the use of relatively thin membrane supported by a pressure difference.

Through increasing the inside air pressure not only the dead weight of the space envelope is balanced, but the membrane is stressed to a point where it cannot be indented by asymmetrical loading.

Principles-