MONITORING STRESS-STRAIN STATE OF THE UNIQUE TRANSFORMED LONG-SPAN SHELL OF THE GAZPROM ARENA STADIUM AS A BASE FOR ITS SAFE OPERATION

Introduction. The main provisions for the development of a system for monitoring the stress-strain state (SSS) of the shell covering the Gazprom Arena stadium are described. This shell characterized by an elevated consequence level under Federal Law 384-FZ belongs to a CS-3 class as per GOST 27752 «Safety of structures in buildings and civil engineering works». According to these documents, a stress-strain state monitoring system should be installed in such a building, functioning for the entire life of the structure.Aim. In this work, an SSS monitoring system was developed and installed in order to determine the parameters of the stress-strain state under continuous control of the unique shell operated at the Gazprom Arena stadium.Materials and methods. The method of determining the parameters of the stress state, including the snow load over the stadium surface, as well as the strain state, was described. The parameters of the strain state were defined using an automated system installed for the first time in construction practice on a unique long-span shell. The process of installing and configuring an automated system of monitoring the strain state was described.Results. A stress-strain state monitoring system was developed that allows continuous monitoring of the unique long-span transformable shell operated at the Gazprom Arena stadium in St. Petersburg. Examples of a graphical deformation scheme were obtained as a result of processing the parameters of the strain state.Conclusions. The development of the most sophisticated stadium in the world having a transformable unique large-span shell and a football field resulted in a sports complex that meets FIFA’s strict requirements for arenas of the World Cup. The system of monitoring the stress-strain state allowed the semi-final and several group matches of the 2018 FIFA World Cup in Russia, as well as eight matches of the European Championship in 2021, to be successfully and safely held. The stadium was ready to host the Champions League Final. Scientific and technical support, including SSS monitoring, ensured the following: monitoring the stress level in the metal elements of a unique long-span shell; determining the movements of its elements; plotting a deformation scheme of the structure; preventing possible emergency situations that occurred and may further occur during the operation of the unique structure.