Foundations of Monitoring for Structural Obiects during Exploitation on the Base of Analysis of Changes in Its Dynamic Parameters

Abstract

The article is concerned with the monitoring of the technical condition of buildings and structures during their exploitation and use. Theoretical foundations for the monitoring are based on the analysis of changes of objects' dynamic characteristics associated with corresponding changes in their technical condition.

The capabilities of the analysis of change of the period and the damping factor at the fundamental frequency of oscillations of buildings and structures as well as their elements are considered taking into account the current normative documentation, codes, and regulations on this topic. Practical results on the accuracy of determination of these dynamic parameters of buildings and structures are presented.

The results of the development of special methods for monitoring of technical conditions of high-rise buildings and long-range constructions are also presented. These methods were developed based on the analysis of changes in transfer functions of dynamic signals propagated through the given volume of the construction. The dynamic signals can be both broadband pulses and harmonic oscillations - both forms of excitation are considered.

Examples are given demonstrating the capabilities of the presented methods for monitoring the state and technical conditions of the construction elements of buildings and structures based on the analysis of their dynamic parameters. The presented methods were used as a basis for both normative documents and to develop stationary systems (stations) for monitoring the technical conditions of buildings and structures.

The proposed theoretical foundations can be used for the digital transformation of the national system for monitoring of safety and state of buildings and structures during exploitation.