Dynamic Performance Analysis Of Grid Structure Considering Soil-structure Interaction

In this paper，based on a stadium，using ANSYS software，studied under rare earthquakebased on soil-structure interaction(SSI) of space truss structure．This paper first overallmodeling is four square pyramid space truss in the three story frame structure on the support，the vibration shape the overall model，and study under rare earthquake typical element stress，displacement，and on the bottom chord changes．Then，select the project location near thethree kinds of typical soil distribution as the foundation，the interaction model is establishedby considering SSI， on the rare event of the influence of foundation under earthquake on thetruss member force chord point displacement．And，the change of basement in SSI model indepth， on the impact of rare earthquake depth of foundation on the truss member force chordpoint displacement．Through the analysis，the foundation the deeper the depth，the naturalfrequency of the structure is more．But some site，especially the site is relatively weak， thedepth of foundation has little effect on the natural vibration frequency．With the site hardens，foundation depth increases，the member stress increases，and some member stress signcounter; horizontal displacement most chord point decrease，increase the verticaldisplacement of abutment．After considering the interaction，most members stress is reduced，yielding rod pieces also reduced;the horizontal displacement of most members reduce，bearing vertical displacement increases，the maximum vertical displacement decrease．...