ROLE OF ACTIVE STRUCTURAL ELEMENTS IN LIFE CYCLE OF BUILDING CONSTRUCTIONS

Abstract

During the life cycle of building constructions, a complex of interconnected and interdependent processes and stages of structural changes are implemented that ensure the safety of their functioning. The structural elements that determines through their existence in the structure of any composite, the conditions of the life history of the construction-system are cracks, inner surfaces of partition and residual deformations. The selected elements belong to the conditionally invisible parts of the material structure. Cracks, internal interfaces and residual deformations can be distinguished as active structural elements, as they are able to react to any influences in the same tempo-rhythm, predeterminations the timely manifestation of structural adaptation (self-organization). This ensures external and internal safety of constructions during operation. However, cracks, inner surfaces of partition and deformities can shorten the life history of the construction, taking it to the path of degradation and death. Thus, cracks, inner surfaces of partition and deformations perform both a structural and destructive role in the life cycle of a construction. Therefore, an important task should be considered an analysis of the role of active elements in the life cycle of building constructions. The carried out analysis contributes to solving the problems related to improvement of safety of structures and products functioning due to directed guidance of active elements in the form of cracks and internal interfaces with mandatory consideration of the influence of residual deformations. To quantify the change of total length of cracks and inner surfaces of partition can be through the coefficients of damage Kd and Kd1. Increasing structural diversity of concrete and expanded clay concrete contributes to the organization of structures in which the distribution of initial cracks prevents them from growing to dimensions dangerous to the structure.