METHOD FOR DETERMINING CHANGE IN DEFLECTED MODE OF BUILDING STRUCTURE Russian patent published in 2005 - IPC

FIELD: construction, particularly working measures on existing buildings.

SUBSTANCE: method involves separating building structure into zones along structure height, wherein each zone includes 3-5 stories; arranging permanent three-component vibration detectors at the border of each zone; applying dynamic load, for instance inelastic impact in the form of wide-band impulse with frequency range covering natural oscillations range of building structure zone to be detected, to building structure; sequentially determining oscillations in three points, namely in point near dynamic load application and at upper and lower borders of the zone; determining transfer functions for each zone to be inspected as ratio of power distributions of simultaneously recorded signals in two points, namely in point of recording dynamic load response in the form of impulse passing through the zone and in dynamic load application point.

EFFECT: possibility to determine exact building structure part in which deflected mode is changed to inspect the structure and to make a decision on further usage or reconstruction thereof.