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The use of modal analysis in the evaluation of welded steel structures

Mariusz Żółtowski, Bogdan Żółtowski, Michał Liss
modal analysis, natural vibration frequency, stabilization diagram

Steel structures are subject to large dynamic loads clearly reflected by generated vibration processes. The vibrations may affect state of serviceability of structures by lowering comfort of persons working there as well as possible reaching the level hazardous to safety of the structures. The effect of vibrations to structure is mainly manifested by additional stresses in a given cross-section, which are summed up with those resulting from static loads. The dynamic loads may cause damaging effects in buildings of various structural types or even lead to their destruction.

Judging the necessity of improving the quality assessment methods of building structures for purposes of estimation of their state as well as safety factors for brick structures, the author of this work undertook an attempt to investigate destruction process of selected object by using the method of experimental modal analysis.

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