The paper presents an experimental evaluation of changes of dynamic properties (periods of natural vibrations and damping) of three identical precast concrete panel buildings of S storeys and a basement resting on different grounds. Building vibrations were excited by firing of explosives in a quarry. On the basis of the investigations, it may be said that a change of flexibility of the foundation medium under the same low buildings distinctly influences the change of the first natural periods (in two mutually perpendicular directions parallel to the longitudinal and transverse axes) of the buildings.
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Edward Maciąg (1986) studied this question.
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