EIGEN-FREQUENCY OF BEARING STRUCTURES OF SVYATO-VOSKRESENSKAYA CHURCH TOWER BELL IN TOMSK

Abstract

Relevance: Investigation of dynamic parameters is significant for understanding and evaluation of the structural behavior and performance characteristics. The analysis of frequency responses obtained in field observations describes the structural behavior under external loads. A comparison of obtained results and theoretical calculations gives an idea of physical state of the structure and a possibility of predicting the structural behavior under changing external loads. Purpose: The aim of the paper is to determine causes of the structural vibrations in the bell-tower of Svyato-Voskresenskaya Church and evaluation of its technical condition. Design/methodology/approach: The values of dynamic parameters are obtained during the insitu measurements using a Remote Sensing Vibrometer RSV-150. The obtained results are processed with the VibSoft-20 package. Research findings: The dynamic parameters of the bell-tower structure are obtained in the form of the eigen-frequency spectra. Their analysis shows that the bell-tower was built with deficiencies which cause its vibrations. It is found that vibrations occur due to the insufficient rigidity of the bearing beam of the bell and anchorage of beam ends into the bell-tower masonry. Practical implications: The obtained results can be readily used for the adjustment of suspension systems of heavy bells and the technical inspection of structures based on the analysis of their dynamic parameters.