Polorotova N.A.
Polorotova N.A.

Полоротова Н.А. Polorotova N.A.
Student, Emperor Alexander I St. Petersburg State Transport University, Saint-Petersburg, Russian Federation


Publications

Response Spectra Method for Extended Systems with Proportional Damping
Issue: №1 2020
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The application of the response spectra method for extended damped systems with a point support on the base is considered. The support excitations can be different. External and internal damping is taken into account, it being assumed proportional i.e. admitting an exact or approximate decomposition of motion according to the undamped system modes. It is noted that the presence of external damping leads to additional system perturbation, i.e. to additional members appearance in the right part of motion equations. It is shown that well-known formulas of the response spectra method for systems on a rigid platform are kept intact, but the vector of load projections on the directions of generalized coordinates is modified taking into account the influence of support displacements on generalized loads in the system.

On the Issue of Taking into Account Damping in the Assessment of Seismic Resistance of Structures
Issue: №6 2019
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The authors present their view of the problem, with the frame of the discussion devoted to equations of seismic oscillations taking into account damping. The oscillation equations taking into account external and internal damping are written down. The cases of homogeneous and inhomogeneous acceleration field of the day surface along the length of the structure are considered.