Сombined asymptotic method in calculation of the internal structural forces: frequency-domain analysis
Authors:
Tyapin A.G.
Dr.Sci.Tech., JSC Atomenergoproject. Moscow, Russian Federation
Rubric: Theoretical and experimental studies
Annotation:
The combination rule for the responses to 1D excitations along 6 DOFs applied to the rigid basement is discussed. This 6D excitation at the basement is calculated in SSI analysis by the combined asymptotic method. Rocking components are correlated with horizontal components of the rigid basement’s motion. As a result, conventional SRSS rule applicable for 3D excitation may sometimes lead to non-conservative results. The author suggested the alternative rule: direct sum of the responses to horizontal and rocking excitation components in the same vertical plane and after that SRSS for the four responses. Here the conservatism of different approaches is compared. All the responses (to 1D and 6D excitations) are calculated in the frequency domain