2019, Vol. 6, No. 3. - go to content...

Permanent address of this page - https://t-s.today/en/23sats319.html

Метаданные этой статьи так же доступны на русском языке

DOI: 10.15862/23SATS319 (https://doi.org/10.15862/23SATS319)

Full article in PDF format (file size: 1 MB)

For citation:

Yashnov A.N., Snejkov I.I. Experience of diagnostics of engineering structures by the method of small impacts. Russian Journal of Transport Engineering. 2019; 6(3). Available at: https://t-s.today/PDF/23SATS319.pdf (in Russian). DOI: 10.15862/23SATS319

Experience of diagnostics of engineering structures by the method of small impacts

Yashnov Andrey Nikolaevich
Siberian transport university, Novosibirsk, Russia
E-mail: yan@stu.ru

Snejkov Igor Ivanovich
Siberian transport university, Novosibirsk, Russia
E-mail: igor.i.s@mail.ru

Abstract. The problems of diagnostics of engineering structures during their service life are considered. As one of the promising methods, the method of vibration diagnostics for changing dynamic parameters (natural frequencies and decrements of oscillations, amplitudes and forms of oscillations) was chosen. The results of various studies in the field of vibration diagnostics of bridge structures are analyzed. The results of the study of the influence of various damages on the dynamic parameters of structures using finite element models are presented. Summarized data of long-term studies of the Siberian transport University to evaluate the technical state of structures based on measurement of natural oscillation frequency. The limitation of the method of vibration diagnostics for lower forms of vibration is associated with low sensitivity and significant influence of various factors on the results. However, in some cases, vibration diagnostics of structures under excitation of oscillations by small pulse effects can be effective. Examples of vibrodiagnostics of the state of structures are given. Vibrodiagnostics is particularly relevant in the study of the actual dynamic work of pedestrian bridges. Regular fixation of «digital dynamic portraits» allows you to track changes in technical condition. It is advisable to use methods of vibration diagnostics and in assessing the effectiveness of strengthening structures. In conclusion, it is noted that using the methods considered, it is possible to organize a system of periodic or continuous automated monitoring of the technical condition of bridges. This is especially important to prevent sudden failures of technically complex and unique structures, as well as in the case of serious damage to the load-bearing structures.

Keywords: bridge; superstructure; orthotropic steel deck; pavement; asphalt; stress-strain state; fatigue strength

Download article in PDF format