Structure-forming and destructive role of cracks in life cycle of construction-system [in Ukrainian].
Journal Title: Вісник Тернопільського національного технічного університету - Year 2015, Vol 80, Issue 4
Abstract
Practically in all build constructions there are active elements in the form of cracks and inner surfaces of partition which predetermine structural changes of material of construction-systems. A driving force of spontaneous processes of structural transformations is the change of parameters of no equilibrium active elements upon their transition to an equilibrium state. Spontaneous change of parameters of active elements provoked the emergence of elements new to system – structural aggregates interacting through inner surfaces of partition and surfaces of cracks. Operational cracks, inner surfaces of partition and structural blocks are hereditarily connected with an initial set of active elements. It causes compulsory taking into account the material in structural changes of construction-system under continuous operational loadings that is possible to be estimated quantitatively by damage coefficients. Spontaneous internal reorganization of the material structure under action of disadvantageous factors on a construction-system; which does not result in the change of the system properties is caused by the change of the active elements parameter of system. It allowed to conclude, that the cracks, by changing their own parameters, can initiate structural changes of both individual subsystems and the whole system, can be treated as submitted as structure-forming cracks. It was determined, that when a limit of structure diversity is obtained the structure-forming cracks are capable to develop into cracks-destroyers (main cracks). Cracks of destruction simplify a structural diversity of basic system, and their activity assumes that the purpose of a new crack-system dominate over the purpose of existence of construction-system when. The crack-system purpose is achieved, it results in its ruination and the end of functional ability of the whole construction object. Under disadvantascous external influences the active elements, due to theirs own changes and interdependent interactions with other structural components, contribute to preserving wholeness and safe functioning of construction-system.
Authors and Affiliations
Valery Vyrovoy, Vladimir Sukhanov, Oksana Korobko
Keywords
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