SPACE FRAMES AND GEODESIC DOMESBY Hindustan Alcox Ltd

www.alcox.in

SPACE FRAMES AND GEODESIC DOMES

Objectives:1. the concepts of point, line, plane and dimensions in

relationship to the triangle. 2. Understand the basic structural engineering concepts

that underlie geodesic dome construction; 3. Understand the advantages and disadvantages of

modern building materials in dome construction; and 4. Have an increased awareness of more in-depth

concepts relating to the study of architecture, geometry, and structures.

Special Words• A polyhedron (many surfaces) is a geometric

solid in three dimensions with flat faces and straight edges.

• A tetrahedron is a polyhedron with four sides, but is also called a pyramid.

• A hexahedron is a polyhedron with six sides, but is also called a cube.

• A polyhedron with six rectangles as sides also has many names—a rectangular parallelepided, rectangular prism, or box.

• An octahedron is a polyhedron with eight faces.

Vocabulary• Tension is a force that acts to expand or

lengthen the thing it is acting on.• Compression is a force that acts to compress

or shorten the thing it is acting on.

• SPACE FRAME STRUCTURE

SPACE FRAMES or SPACE STRUCTURE CAN SPAN LONG DISTANCES

SPACE FRAMES• A space frame is a truss-like, lightweight rigid

structure constructed from interlocking struts in a geometric pattern.

SPACE FRAMES

• Space frames or Space structure usually utilize a multidirectional span, and are often used to accomplish long spans with few supports.

SPACE FRAMES• They derive their strength from the inherent

rigidity of the triangular frame; flexing loads (bending moments) are transmitted as tension and compression loads along the length of each strut.

Simplified space frame roof with the half-octahedron highlighted in blue

• Space frames or Space structure are an increasingly common architectural technique especially for large roof spans in modernist commercial and industrial buildings

Some space frame applications include:

• Hotel/Hospital/commercial building entrances

• Commercial building lobbies/atriums

• Parking canopies

Advantages of space frame systems over conventional systems:

Random column placement

Column-free spaces

Minimal perimeter support

Controlled load distribution

Design freedom

Supports all types of roofing

GEODESIC DOMES• A geodesic dome is a sphere-like structure

composed of a complex network of triangles.

GEODESIC DOMES• Geodesic domes are usually

hemispheres (parts of spheres, like half a ball) made up of triangles. The triangles have 3 parts: –the face - the part in the middle –the edge - the line between corners –the vertex - where the edges meet

The triangles create a self-bracing framework that gives structural

strength while using a minimum of material.

DOMES

A dome’s design is dependent upon many factors, including:

• Needed area and span, or distance between supports;

• Budget and building schedule;• Architect’s and /or client’s aesthetic

preferences;• Forces, such as compression and tension,

acting on the structure; and• Building materials.

EXAMPLES OF GEODESIC DOMES:

Spaceship Earth, the AT&T Pavilion at Epcot in Disney World, Florida, is an adaptation of Buckminster Fuller's geodesic dome

Tacoma Dome in Washington State Milwaukee's Mitchell Park Conservatory Biosphere desert project in Arizona Des Moines Arboretum, a self contained

ecosphere

Engineering Disasters Engineers must be concerned about safety at all times.

Lives are at stake when bridges, buildings, or structures collapse. Engineers must design structures to withstand all kinds of weather conditions and all types of loads. While the goal is to have no design fail, engineers examine and learn from past mistakes to avoid such failures in the future.

• Tacoma Narrows Bridge, Tacoma, Washington (failed in 1940)

10 killed

Engineering Disasters • Falls View Bridge, Niagara Falls (failed 1938)

18 killed• Tay Bridge, Scotland (failed in 1879)

29 killed• Quebec Bridge, St. Lawrence River (failed

1907,1916) 45 killed

Engineering Disasters • Point Pleasant/Silver Bridge, Ohio River

(failed 1967) 75 killed

• Hyatt Regency Walkway Collapse, Kansas City, Missouri (failed in 1981)

112 killed

Hindustan Alcox Ltd28 years experience in Engineering steel

structures• High credentials in the market

• Commitment• Quality Work• Timely completion

• Good creditability with suppliers• The company is engaged

• Design• Fabrication• Erection

• Specialized steel structures• Space Frame• Pre Engineered Buildings• Large Span Steel Structures

• ALCOX DOESN'T CREATE PRODUCTS, IT ENGINEERS SATISFACTION.EACH AND EVERY PROJECT IS TREATED AS AN OPPORTUNITY AND EVERY ACHIEVEMENT AS A PLATFORM TO SET NEW GOALS.

We are the space frame manufacturer in India

Thank you