METHOD FOR VIBRATION CONTROL OF THE TECHNICAL CONDITION OF BRIDGE STRUCTURES Russian patent published in 2022 - IPC G01M7/02 

FIELD: bridge structures.

SUBSTANCE: invention is intended for vibration control of the technical condition of bridge structures. The substance of the invention lies in the impact on the bridge structure of a dynamic load, while measuring the parameters of mechanical vibration using accelerometers at the control points of the bridge structures, according to the invention, the parameters of the dynamic load, scheme and mass, the rate of application to the bridge structure are taken comparable to the parameters of the actual live load, and the measurement of mechanical vibration parameters is carried out by accelerometers-vibrometers, intelligent, digital with built-in processors, which, by integrating the registered accelerations, calculate vibration velocities and vibration displacements at control points, and as the main criteria for assessing the technical condition of the bridge structure, they take the ratio of the measured maximum values ​​of displacements - amplitudes in directions axes of a three-dimensional coordinate system with the origin at the control point to the calculated value of displacements from the static application of the load, equal in mass to the dynamic load (Kx, Ku, Kz), as well as the measured dynamic coefficients (1+μ)_х, (1+μ)_у, (1+μ)_z, defined as the ratio of the measured maximum displacement values ​​- oscillation amplitudes to the average measured value in the direction of the corresponding axes of the coordinate system to the calculated dynamic coefficients, and the obtained values ​​(Kx, Ku, Kz) in the interval above 1 correspond to the presence of a zone of anomalous mechanical stress, and the values ​​(Kx, Ku, Kz)<1 - about its absence , as well as the ratio of the measured values ​​of the dynamic coefficients to the calculated ones.

EFFECT: simplification of the control of the technical condition of various types of bridge structures and the possibility of taking into account various types of defects in these bridge structures.

1 cl, 3 dwg