Comparison of statically undetectable prestressed reinforced concrete trusses

Abstract

Comparison of statically undetectable prestressed reinforced concrete trusses

Pchelkin V. O., Klyuchev A. N., Gukin A. A., Zaika V. A., Sorokin N. V., Petrov V. V.

Incoming article date: 27.03.2021

For the statically indeterminate systems under consideration, there is an optimal ratio between the load-bearing capacity of stretched and out-of-center compressed elements, in which the required reliability will be provided at the lowest value of the mathematical expectation of an external destructive load. It should also be noted that for statically indeterminate systems, the beginning of rebar fluidity is not a sign of destruction, but only indicates the beginning of an intensive redistribution of forces in it. Therefore, the values of C, do not refer to the beginning of the rebar flow, but to the complete exhaustion of the load-bearing capacity. The reliability of statically undetectable systems, including prestressed trusses, is always higher, all other things being equal, than that of statically definable systems.

Keywords: reinforced concrete, reinforced concrete structures, statically indeterminate systems, reliability