ANSYS/LS-DYNA explicit integration procedures simulation of the foundation gravel layer to improve the seismic capacity of buildings

TLDR: In this paper, the authors used the ANSYS 10.0 software available for two kinds of plane frames (one with foundation set with stone cushion and the other without stone cushion) to conduct seismic response simulation analysis.

Abstract: In order to verify the damping effects of the foundation with gravel layers on the upper building,ANSYS/LS-DYNA ecplicit integration procedures in the ANSYS 10.0 software available for two kinds of plane frames(one with foundation set with stone cushion and the other without stone cushion) were adopted to conduct seismic response simulation analysis.The thickness of the gravel cushion were taken as 1000 mm in the simulation process.The equivalent dynamic shear modulus was choosen,for the relative thickness of the entire gravel layer is very little.Simulation results show that under the effect of horizontal seismic waves,the largest positive displacement of the framework with the foundation of the stone cushion decreased by 56.08% comparied with the foundation without the stone cushion,while the largest decrease of negative displacement is 56.72%.Therefore,setting the foundation of gravel cushion helps to improve the seismic capacity of the upper part of the building to some extent.