Determination of Bearing Capacity and Stress-Deformation State of Prefabricated Reinforced Concrete Slab after Influence of Freeze-Thaw Cycles

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Rubric:     Theoretical and experimental studies   
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In the absence of conservation, reinforced concrete slabs are most exposed to atmospheric influences, affecting the strength and deformation characteristics of concrete and bearing capacity of structures. The impact of field conditions on the properties of concrete
depends on many factors that are almost impossible to simulate in accelerated laboratory con-ditions. Therefore, the General approach to the characteristic of the change of the bearing capacity at corrosion damages of reinforced concrete slabs in the conditions of cyclic freezing-thawing, is to assess the main all possible effects of natural conditions on the change of the bearing capacity. This article discusses the numerical calculations to determine the bearing capacity of corrosion-damaged concrete slabs. For an accurate assessment of the residual life of the bearing capacity of the floors in the conditions of long-term cyclic freezing-thawing, were selected typical schemes of damage to the plates and performed a series of tests of corrosion-damaged concrete slabs.
The work of structures in the inelastic stage, as well as the gradual increase in the load, defined deflections, defor-mations and bearing capacity of the plates in the stages of cracking. The comparative analysis of results of numerical calculations and full-scale tests
of plates is given.