A MONUMENT OF HISTORICAL HERITAGE - VILNIUS ARCHCATHEDRAL BELFRY: THE DYNAMIC INVESTIGATION

The dynamic investigation of it monument of historical heritage - Vilnius Archcathedral Belfry - is investigated. In 2002 six new bells were installed in Vilnius Archcathedral Belfry according to a modern location scheme and their ringing order wits changed. Evidently, they caused different dynamic loads which were not completely controlled and their effect on historical buildings of the Old Town of Vilnius could hardly be predictable. The paper presents the results of dynamic investigation of the Archcathedral Belfry, subject to the influence Of the bell system operation. The dynamic impact was evaluated by measuring the acceleration history under the conditions, when different combinations of bells were used. A contribution of the dynamic effects was assessed in terms of response spectra. The Obtained results have been thoroughly analysed and the appropriate findings and Conclusions provided.