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Eq. 2 is the cumulative Weibull distribution with scale parameter and shape parameter ; = [^ ()] = constant factor depending on the structure geometry, = structure volume; = relative (size-independent) coordinate vectors, ^ = dimensionless stress field (dependent on geometry), scaled so that the maximum stress be 1; = number of spatial ...
The effective reinforcement ratio was determined from the maximum arching moment of resistance in a rigidly restrained concrete slab, which Rankin [21] had derived for laterally restrained concrete slabs from McDowell, McKee and Sevin's [22] arching action deformation theory for masonry walls.
The Pantheon in Rome, built in the 2nd century, was the largest dome in the world for over a millennium, and is still the largest unreinforced solid concrete dome. The dome of Florence Cathedral was the largest in the world from its construction in 1436 to 1871, and is the largest brick and mortar dome.
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
The technology was derived from air structure, which is erected just as a balloon is erected. Bini further drew insights from the pneumatic air-supported tennis dome. In 1965, the first Binishell was built. It had a 12-meter diameter, 6-meter height, and was lifted using Bini's patented pneumatic formwork. [3]
The geodesic dome appealed to Fuller because it was extremely strong for its weight, its "omnitriangulated" surface provided an inherently stable structure, and because a sphere encloses the greatest volume for the least surface area. The dome was successfully adopted for specialized uses, such as the 21 Distant Early Warning Line domes built ...
The weight of the element can be determined by the calculated volume, and using the specific gravity (normal weight reinforced concrete is approximately 24 kN/m3). Establishing the lifting anchor positions will influence the rigging arrangements used and therefore the static analysis of the rigging should be determined.
No record exists of the first calculations of the strength of structural members or the behavior of structural material, but the profession of a structural engineer only really took shape with the Industrial Revolution and the re-invention of concrete (see History of Concrete). The physical sciences underlying structural engineering began to be ...
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