Сombined asymptotic method in calculation of the internal structural forces: linear spectral analysis
Authors:
Tyapin A.G.
Dr.Sci.Tech., JSC Atomenergoproject. Moscow, Russian Federation
Toporkov A.S.
JSC Atomenergoproject, leading engineer
Rubric: Theoretical and experimental studies
Annotation:
The new options of SCAD soft enabling linear spectral analysis following the requirements of nuclear industry codes were tested against close form solutions, ABAQUS modal analysis and FFT analysis in the frequency domain. Single-mode responses to 1D excitation were checked including angular excitations; then multi-mode responses to 1D excitation were compared including residual modes. Finally the responses to the six-component excitation set up at the rigid base mat were compared. This excitation was obtained using Combined Asymptotic Method to account for soil-structure interaction. The results demonstrate the unacceptable underestimation of vertical internal forces calculated using civil codes (unlike nuclear codes)