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Monocoque Construction

Investigation into the advantages and disadvantages of monocoque and semi-monocoque construction
by

Aaron Aldridge

on 26 October 2012

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Transcript of Monocoque Construction

Monocoque Construction Monocoque construction is a construction technique that integrates the outer frame and inner frame into a one piece structure.
Carries loads down the foundation bearing points. Advantages Extremely rigid structure that can support itself.
Good deal of torsional and lateral stability.
Lightweight.
More space inside the structure.
No load bearing pillars
Relatively fewer materials used in construction. Disadvantages Relies mostly on continuous surface to carry load.
Damage to exterior will compromise integrity of the structure.
Repairs and modifications are difficult. Examples of monocoque construction Cars Integrating the body and chassis of the vehicle together into a one piece structure.
Makes the final construction lighter.
Makes overall construction simpler.
Crumple zones can be integrated into the car Cars constructed using traditional methods:
Relatively inexpensive
Heavy
Lower performance
high fuel consumption Aircraft Mostly semi-monocoque structure.
Loads are predominantly supported through external skin, shaped by light frames or formers.
Weight is supported by its inner structure and is aided by stringers.
Stringers are strips of material in which the skin of the aircraft is fixed securely, adding tension to the structure. Disadvantages in monocoque construction:
Structure becomes very weak if they are indented.
Crumples with ease once damaged. Lord's Media Centre The Media Centre is a semi-monocoque aluminium structure and was built in the Pendennis Shipyard utilizing shipbuilding technology. It's sole support comes from the structure around its two lift shafts.
No load bearing pillars.
First aluminium semi-monocoque building in the world.
Resembles aerodynamic contours with an enclosing skin, smooth, white and seamless shell. The Yas Bridge The |Yas Bridge links the two towers of the Yas Hotel together by a monocoque steel and glass bridge. Supported by its exterior surface or skin instead of an interior framework.
Significantly reduced structural weight.
Strong and rigid.
Provides more space inside.
Built with relatively fewer materials. Semi-monocoque Construction The semi-monocoque system uses a substructure
to which the skin of the structure is stretched.
Consisting of stringers on the inside that create tension, which add rigidity to the whole structure. The main difference between monocoque structures and semi-monocoque structures is that semi-monocoque structures are strengthened and supported by Stringers & Bulkheads, compared to the full monocoque structure. Monocoque structures do not have stringers nor Bulkheads, and a smooth surface can be added on top which is added in sections, reducing the need for several plates as see in the example: Standing Seam roofs Embedded energy Materials: Carbon fibre, fibre glass, aluminium, Steel Ship building in China China’s major shipbuilding location is Wuhan
Wuhan has a thriving shipbuilding industry.
25 shipyards in Wuhan itself
Shipyards focus mainly on the construction of container vessels, bulk carriers and multi-purpose ships
High availability of labour
Shipbuilding technology and methods of constructing ships can be transferred to the construction of buildings.
The shipyard's business line extends to various fields such as aero space, metallurgy, petrochemistry, harbour machinery, munipal infrastructure, bridge, steel structure and building materials. Necessary plating Visible plating Normal monocoque structure Bamboo Structure and properties Reinforcing knots and silificattion of outer tube wall gains harness and buckling strength of the stalks
Stiff and light
Useful as a building material
Sustainable, eco-friendly and biodegradable
Not prone to destructive insects Technology inspired by Nature Winglets Inspired by the stepped eagle.
Winglets reduce drag and allow aircraft to be more fuel efficient. Office buildings Termite built structures. Methods of insulating that allow buildings to monitor and regulate temperatures more cost efficiently. Bionic Dome Modeled on the plate skeleton of a sea urchin resulting in strong and lightweight structure. Glulam Technology Consists of individual laminates of structural timber, connected with bolts, plain steel dowels and steel plates.
Used for beams, arches or columns
Used for building: schools, sports halls, railway stations, industrial, agricultural buildings and commercial buildings, shopping centres, bridges and homes. Advantages Disadvantages Lower resistance to heat and fire.
Requires more energy to produce compared to solid timber
Some adhesives used may be toxic, with the release of formaldehyde.
Those intended for interior use: more prone to humidity-induced warping than solid woods.
Higher maintenance than steel: water resistance, less resistant to termites and other destructive insects. Versatile: used for beams, columns, decking and almost any type of structure.
Light: two thirds the weight of steel, one-sixth the weight of reinforced concrete beam.
Cheaper: savings in transport, foundations and buildings.
Easy to fix: easy handling, easy to customise.
Durable
Natural appearance, remewable source and one tenth of energy used to produce an equivalent steel beam
Fast delivery Hybrid beams Flat steel plate with staggered holes so that two pieces of wood can be bolted together with the steel plate in between.
Stronger than just timber. Technological Transfer Hydraulic bracket products Yi Chang-Xiling Yangtze River Bridge Dam gate built for the Three Gorges construction project Key equipment for a Shenzhou series manned spaceship assembling testing centre SHIGERU BAN - Paper tube arch frame
- Structural plywood
- Clear corrugated polycarbonate panels MATERIALS No air-conditioning
Less energy consumption
Outside air is drawn into the building
Air exits vertically through chimneys at the top
Fresh air replaces stale air
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