Soil-structure interaction under earthquake loading

Hello everyone,

Is there anyone can help me to explan why the acceleration time history at nodes on the structure is too high (40g) and look weird.

I am working on nonlinear analysis of three-dimensional Soil – Underground subway structure interaction under earthquake loading in LS-DYNA. The solid element is used for both soil (MAT_079) and concrete (MAT_084/085), and the beam element for rebar (MAT_003). *DAMPING_FREQUENCY_RANGE option is adopted for damping simulation. Contact interface between soil-structure is used AUTOMATIC SURFACE TO SURFACE. The the acceleration time history in soil domain is fine but only problem in structure.

Thank you.

Compétences : Génie Civil, Ingénierie, Analyse d'éléments finis

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Nº du projet : #19976409

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