Stress-strain state of composite steelcrete beams at the assembly stage

Abstract

EN: Nowadays constructions with using composite sections (concrete floorson a steel beams, for example) is a popular in building industry. Using the anchors, cross-sectionensures interoperability and more efficient in terms of bearing capacity than a similar non-combinedcross-sections made by same materials. Currently, many methods of calculating the compositecross-section have been developed, and conditions of stress-strain state were taken into account.This is led to very close to real results, with a minimum of errors. However, almost nothing isknown about the effects that occur at the assembly stage, when the composite section of steel and concrete is not yet joined, the concrete has not yet hardened and has not gained its strength. Forexample, in such cases, during the hardening of the concrete mixture, the reverse bending of thebeam was observed [1].Purpose of the study is to investigate the redistribution of forces and the change indeflections during the stabilization of the concrete flange in the composite section.