Acta Scientiarum Polonorum

Building objects are subject to large dynamic loads clearly reflected by generated vibration processes. The
vibrations may affect structures serviceability state by lowering comfort of persons working there as well as
possibility of reaching the hazardous level to structures safety. Judging the necessity of improving the quality
assessment methods of building structures for purposes of state estimation as well as safety factors for brick
structures, the authors of this work undertook an attempt to investigate destruction process of selected brick
object by using the method of experimental modal analysis.