The reliability of residential and public buildings, in particular large-panel and volumetric-block buildings, depends on the composition and number of elements that form them, accounting and methods of combining them into an integral system while ensuring the normal functioning of all elements of the system. However, unlike the systems of living organisms in the functional systems of buildings, violations of the connections between the elements are not compensated and the functions of each element are not replenished with other elements. To fully reflect the factors affecting the reliability of buildings, you have to complicate and increase the system. The reliability of such a system will depend on the reliability of hundreds and thousands of elements, t. e. formally it may turn out that the building is constantly in a non -working state. Due to the complexity of the system, as is observed in living nature, high reliability can be ensured. Buildings with a transstrope-polygonal structure mounted from hexagonal blocks, this is an example.
In the building as a complex technical system, the failures of elements do not necessarily lead to the complete cessation of its functioning, but rather to some decrease in its effectiveness. It is important to know at any time the effectiveness of a complex system, which can be characterized by the number of refusal elements. This allows, as an indicator of the reliability of the building as a system, to accept the measure of maintaining its effectiveness within the specified limits, determined by the reliability of the elements.