Abstract
This paper deals with a bridge pier energywise uniform strength cylindrical steel-concrete load-bearing unit having a mesh case, which is made of an expanded metal mesh, as the most rational and the least resource-demanding one, using the nonwaste technology. The rational parameter selection method, which guarantees cross section uniform strength for the suggested load-bearing unit, is provided. The concrete core of the given element is a hollow cylindrical element that varies in height and whose centre of gravity coincides with an external loading point for any horizontal cross section. In addition to uniform strength, the hollow enables you to control the centre of gravity of the given complicated compound cross section of a cylindrical steel-concrete load-bearing unit. The calculation method to determine the main geometric parameters of the uniform strength load-bearing unit of a bridge cylindrical column pier having the lateral cross section area that varies in height is provided. The geometric parameters are the centre of gravity and its coordinates, central inertia moments and the radius of inertia. To exclude an impact of random eccentricity on a complicated compound cross section of a pier uniform strength steel-concrete load-bearing unit, the method to design a cross section core is provided.
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