Three-Dimensional Site Response Analysis of Sloping Ground

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Example prepared by: Christopher McGann and Pedro Arduino, University of Washington

Return to OpenSees Examples Page

This article discusses a three-dimensional effective stress site response analysis of a slope using OpenSees. The considered site consists of layered cohesionless soil underlain by bedrock. The slope has a 2% grade perpendicular to the direction of shaking. The model consists of a single column of 3D brick elements supported vertically at the base. Periodic boundary conditions are applied in both horizontal directions. A Lysmer-Kuhlemeyer (1969) dashpot is utilized to account for the finite rigidity of the underlying elastic medium, and the loading is applied in a manner consistent with that proposed by Joyner and Chen (1975).

Provided with this article are several files. Files which are required for the analysis are indicated. The files include:

  • The example input file, freeField3D.tcl (required for analysis)
  • The velocity time history of the selected earthquake record, yerbaNSvelocity.out (required for analysis)
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