Coefficients of the irregularity of the deformation of the reinforcement and the concrete of corrosion damaged reinforced concrete slabs

Abstract

Introduction. In practice, to perform calculations to determine the bearing capacity of reinforced concrete slabs at the stage of cracking, the work of concrete between cracks in the tension zone is taken into account.

This paper presents the results of full-scale tests of damaged precast reinforced concrete floor slabs to determine the coefficients V.I. Murashev – uneven deformations of reinforcement ψ_s in the tension zone and concrete ψ_b in the compression zone for corrosion-damaged slabs in the stage of cracking.

The aim of the work: to determine the coefficients of uneven deformation of reinforcement and concrete experimentally for corrosion damaged reinforced concrete floors at the stage of cracking.

Materials and methods. The article describes the methodology for setting up an experiment to measure the deformations of reinforcement and concrete, slab deflections, crack opening widths, and describes the parameters of the testing installations.

Results. The work presents the main results of experimental studies in graphical form.

Conclusions. Research shows that with the appearance of cracks, the coefficient ψ_sx first increases and then stabilizes. The coefficient ψ_bx immediately after the formation of cracks first increases slightly, then decreases more gradually.