bearing capacity of compressed steel reinforced concrete structural elements using shaped pipes with cavities for engineering communications
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2018, Vol 1, Issue 73
Abstract
In some cases, during the design and construction of buildings and structures, there is a need to hide engineering networks within the bearing structures. For this purpose it is advisable to use cavities for engineering communications in the compressed element section. At present, there are different techniques for calculating the compressed steel reinforced concrete elements bearing capacity under eccentric compression. Not all existing techniques make it easy to take into account the availability of cavities in the element section. The method of calculating the compressed steel-reinforced concrete elements bearing capacity under the eccentrical compression taking into account deformation under the load action is adopted for consideration. The given technique is presented on the example of calculation of compressed steel-reinforced concrete elements bearing capacity using rectangular shaped pipes. The method involves the compressed concrete work in three stages (elastic, elastic-plastic and plastic), and the work of steel rolled profile - in two stages (elastic and plastic). The cross-section is divided into a finite number of elementary sections of the shaped pipe and concrete. Further calculation is based on the the equilibrium condition fulfillment of the sum of the internal forces in each elementary section of the cross-section and the external load applied to the cross-section. This technique for calculating bearing capacity does not take into account the availability of cavities in the the element section, therefore, it is necessary to make changes in this technique. When making changes to the technique, the cavity size in the cross section is taken as such that corresponds to the finite number of the concrete elementary sections. Two variants of the section structural design (a steel pipe cavity with high-quality anticorrosive protection or a polymeric tube cavity) are offered for the use in construction. The article proposes the variant of the compressed element section structural design with a cavity of round shape, as well as an improved method for calculating the bearing capacity of compressed steel reinforced concrete elements upon the cavity availability in the cross-section for engineering communications.
Authors and Affiliations
V. M. , Dzhura, V. O. , Babenko
Keywords
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