MONITORING OF SEASONAL OPENING OF CRACKS ON THE EXAMPLE OF SOFIA KYIVSKA NATIONAL RESERVE

Abstract

An instrumental method for monitoring changes in the width of crack opening in the constructions of the National Reserve "Sofia Kievska" is presented. Due to the uneven sediment of the foundations, causing the appearance of stress and effort in the load-bearing building structures, there is a process of cracking. The process of cracking is one of the manifestations of deformation processes that need to be monitored, and therefore to conduct regular instrumental observations.
 The urgency of instrumental monitoring is assumed to be a careful attitude to the historical and cultural heritage of Ukraine, in particular the National Reserve "Sofia Kievska".
 The main task of the publication was to consider the method of instrumental observation of the change in the width of the crack opening using the comparator "SDM 50/500". Investigate the dependence and analysis of seasonal fluctuations in ambient temperature and humidity changes in the width of crack opening based on the results of five years of monitoring of cracks in the structures of St. Sofia Cathedral of the National Reserve "Sofia Kievska".
 The article presents the results of long-term monitoring by a unique method using the comparator "SDM 50/500" width of cracks in the walls of the historical and cultural monument of architecture and history of Ukraine of St. Sofia Cathedral of National Reserve "Sofia Kievska". The presented monitoring results were collected during five years of work.
 According to the results of observations, a graph of the development of changes in the width of crack opening over time over 5 years is constructed. The direct dependence on air humidity and the inverse dependence on the ambient air temperature are analyzed with the help of the constructed dependence graphs.
 The results of the study provided an opportunity to develop clear recommendations for further studies to monitor the development of cracks. The main direction of further research will be to improve the method of surveying the change in the width of the crack opening using a portable comparator "SDM 50/500".