Experimental study of the work of a reinforced concrete floor slab under punching by column

Abstract

Experimental study of the work of a reinforced concrete floor slab under punching by column

Filatov V.B., Galyautdinov Z.Sh., Kovalenko M.V.

Incoming article date: 13.05.2020

A brief analysis of dependencies for calculating the punching of reinforced concrete slabs used in domestic and foreign design standards is presented. The results of an experimental study on experimental samples of the strength of a monolithic floor slab with a central punching by column of square and rectangular cross-sections are presented. Comparative analysis of experimental and calculated values of destructive loads showed a significant excess of the calculated values for the sample with a rectangular column. The observed excess of the calculated values of destructive loads over the experimental values is due to the presence of features of the stress-strain state in the zone of punching for rectangular columns. The excess of the calculated value of the destructive load over the experimental value noted during tests indicates a decrease in the structural safety of such interface nodes in the monolithic girderless frame of buildings.

Keywords: reinforced concrete, monolithic girderless frame, punching, loading platform, prototype, destructive load, prismatic strength, deformation, strain gauge