Authors : Juri Viktorovich Popkov, Gennadi Alekseyevich Smolyago, Evgeni Sergeevich Glagolev, Nikolay Victorovich Frolov and Dmitry Vyacheslavovich Obernikhin
Abstract: Results of the experimental studying of deformations with the first application of a method of a holographic interferometry in research of the samples or models of the squeezed ferroconcrete designs are presented. Prototypes, means of their loading and method of registration of holograms are described. A set of the interferometer and the scheme of realization of a method of two expositions in the record of interferograms at a step loading of the studied objects is shown in details. The way of interpretation and results of the analysis of regularities of the interferential strips arrangement is specified. On the basis of data of the experiment it is established that in the method of holographic interferometry by means of only qualitative analysis of a picture of interferential strips it is possible to receive a full picture of distribution of deformations of ferroconcrete element side. The received dependences of deformation of cross sections confirm justice of application of a hypothesis of flat sections in settlement models. Using results of experiments of different researchers, the analysis of characteristics of concrete tension of a squeezed zone of ferroconcrete designs which are reinforced by steel of the S800 class and more on the basis of which it is offered to apply the transformed diagram “tension deformation” to the concrete in the general deformation method of calculation. The diagram considers influences of a gradient of deformations’ distribution and high-strength fittings.
Juri Viktorovich Popkov, Gennadi Alekseyevich Smolyago, Evgeni Sergeevich Glagolev, Nikolay Victorovich Frolov and Dmitry Vyacheslavovich Obernikhin, 2014. Deformations and Tension in Concrete of Squeezed Zone of Non-Centrally Loaded Ferroconcrete Elements. Research Journal of Applied Sciences, 9: 1021-1029.