Comparative characteristics of the transmission length in prestressed concrete structures

Structural mechanics

Determination of the effective length of the stress transmission zone is one of the necessary conditions for designing prestressed reinforced concrete structures. The degree of stress transfer to concrete directly affects the strength and reliability of structures. Therefore, this article analyzes the existing research developments. Also, it compares the methods for determining the transmission length in a numerical, finite-element and experimental way. In particular, the numerical calculation was carried out according to the normative formula for heavy concrete, and the finite element model was constructed by analogy with the experimental scheme used in the earlier study. As a result, it was established that the calculation according to the normative formula and the modeling by the finite element method give overestimated values of the transmission length in comparison with the experimental ones. This is important in the analysis of prestressed structures made of new high-strength materials, which cannot be fully calculated using standard formulas and require separate analysis