Calculation of reliability of the steel concrete beam for criterion of durability of the working armature in case of formation of the normal crack in the stretched concrete zone

Utkin Vladimir Sergeevich, Karpushova Kristina Alekseevna

Federal state autonomous educational institution of the higher education «Vologda state university», Vologda, Russia

Abstract:

In work the method of calculation of reliability (safety) of a reinforced concrete beam with a crack in the stretched beam concrete zone by criterion of durability of working fittings in section with the opened crack is presented. In this section sharply increases the voltage in the working armature in comparison with the voltage in the armature outside of cracks and accordingly reduced the reliability of beams according to strength condition of the valve. Tension in fittings on participation with the opened crack in concrete of a beam is offered to express through width of disclosure of a crack, what is much simpler, more precisely and the result of calculation of reliability of a beam on criterion of durability of fittings at a stage of operation will differ in bigger reliability.

Keywords:

A beam, a crack in concrete, fittings, tension, crack width, reliability of a beam, safety, an operation stage.