One of the work cycles of reinforced concrete structures is the state of repair and reconstruction, including the steps of strengthening elements. The traditional types of strengthening of reinforced concrete which are steel and concrete collars and shirts - now are receding into the background. New methods of strengthening with modern materials such as lamellae are increasingly being used. The article deals with the issues related to strengthening the structures made of high-strength concrete using composite polymeric materials.

A number of principles to ensure the reliability of individual production machines have been formulated. A block diagram of the model for ensuring the gamma-percentage target life of the individual production machine parts has been built on their basis. To assess the model adequacy, the accelerated operational tests without a test stand base have been proposed. A machine (units, parts) is considered as a system with mutually loaded elements, i.e. self-stand.

Reinforced concrete elements of structures in the form of columns, beams, ceilings are widely used in the construction of buildings and structures of industrial and civil construction. In most cases, the columns serve as supports for other building elements, for example, crossbars, slabs, girders, beams. One of the cycles of the work of reinforced concrete structures is the state of their repair and reconstruction, including the stages of strengthening the elements. There is a problem of strengthening of reinforced concrete columns. The article deals with the issue of reinforcing columns and other structural elements having a cylindrical surface, with polymeric composite materials in the form of carbon fiber lamellae. The use of composite materials allows to increase the service life and strength of reinforced concrete structures used in construction.

The article is devoted to the problems of creating comfortable living conditions for the inhabitants of rural and urban settlements. Architectural bionics is a branch of architecture in which great attention is paid to the study of the form and organization of natural objects and the design of building structures in a bionic style for residents of both rural and urban settlements. Currently, it is necessary to change the urban environment, taking into account all aspects of harmonious development and taking into account the natural features of the region. Many architects around the world are working in this direction. The use of modern materials makes it possible to create structures that are unique in shape and structure. Optimality in creating a comfortable human environment, taking into account the minimum impact on nature, is the task of designing structures.