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FEATURES OF OPERATION UNDER LOAD OF REINFORCED CONCRETE THREE-LAYER SLAB STRUCTURES

CONCRETE

UDC 69

Belyaev A. V. lead engineer, JSC Design-Technological Bureau of Concrete and Reinforced Concrete, KTB beton group, Moscow, Russia

Alitinform №2 (63) 2021 г. 6-14 p.

Abstract

The use of three-layer reinforced concrete slabs with an average layer of self-compacting expanded clay concrete reduces their weight by up to 30%. To clarify the parameters of the stress-strain state of the floors, formulas for calculating tangential stresses in layered bent reinforced concrete elements at the stages of working with cracks in the stretched zone, taking into account the position of the neutral line, are obtained. The calculation of elements according to the deformed scheme using the proposed formulas makes it possible to identify the nature of the distribution of tangential stresses along the length of the element and along the height of the section in areas with and without cracks, as well as to improve the convergence of experimental and theoretical values of deflections. The influence of shear deformations on deflections of reinforced concrete three-layer slabs has been studied.

Key words:

reinforced concrete, three-layer floor slabs, deformations, tangential stresses, shear modulus

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