COMMENTS TO THE PAPER BY A.G.TYPIN “NON-CLASSICAL DAMPING IN THE SOIL-STRUCTURE SYSTEM AND APPLICABILITY OF THE LINEAR-SPECTRAL METHOD TO THE CALCULATION OF FORCES”
COMMENTS TO THE PAPER BY A.G.TYPIN “NON-CLASSICAL DAMPING IN THE SOIL-STRUCTURE SYSTEM AND APPLICABILITY OF THE LINEAR-SPECTRAL METHOD TO THE CALCULATION OF FORCES”

COMMENTS TO THE PAPER BY A.G.TYPIN “NON-CLASSICAL DAMPING IN THE SOIL-STRUCTURE SYSTEM AND APPLICABILITY OF THE LINEAR-SPECTRAL METHOD TO THE CALCULATION OF FORCES”

Authors:  

Vorobyova K.V.
St. Petersburg State Transport University, engineer

Уздин Александр Моисеевич Uzdin A.M.
Dr. of Eng, Emperor Alexander I St.Petersburg State Transport University


Rubric:     Viewpoints   
Annotation:
The comments consider the possibility of using the response-spectra method (RSM) taking damping into account in seismic calculations. The results of the paper under consideration are fair if the influence of damping on the shape modes has not been taken into consideration. At present there exists a variant of RSM, which takes into account the damping influence on shape modes. This variant of RSM has been described in the comments. In this case complex eigenvalues and eigenvectors of the damped system are calculated. The imaginary part of the eigenvalues determines the modal frequency, and the real part of the eigenvalues determines the modal damping. Seismic forces are calculated taking into account the amendments caused by modal damping.

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