The Algorithm for Detecting Negative Changes at the Local Point in the Geotechnical System Using Bifurcation Diagrams of Vibration Factors

Proceedings of ‏The 3rd International Conference on Applied Research in Engineering, Science and Technology

Year: 2020

DOI:

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The Algorithm for Detecting Negative Changes at the Local Point in the Geotechnical System Using Bifurcation Diagrams of Vibration Factors

Grecheneva Anastasia, Dorofeev Nikolay, Romanov Roman1 and Pankina Ekaterina

ABSTRACT: 

The article is devoted to the possibility of detecting negative changes at the local point in the geotechnical system using bifurcation diagrams of the vibration factors. The main vibration factors and their parameters affecting the stability of structures are described. Vibration, acting on the structure, leads to the emergence of additional forced vibrations characterizing changes in the stability of the geotechnical system site. The possibility of using external vibrational noise as a source of a probing signal for monitoring of the building state is noted. A nonlinear model of the stability of the structure is given taking into account the impact of vibration factors. The dynamic behavior of the elements of the building structure with one degree of freedom was modeled, taking into account the load. A bifurcation diagram of the process of deformation of the building structure under the action of the load was constructed. It was found that under vibration exposure, the static load, which is the mass of the floors of the building, can have a significant effect on reducing the stability of structures. The effectiveness of the proposed algorithm is proved when comparing the values ​​obtained in the calculation of the mechanical rigidity of the structure according to the standard method based on the use of a dynamic coefficient.

Keywords: geotechnical system, stability, vibration effect, bifurcation diagram.