Effective Stress Site Response Analysis of a Layered Soil Column: Difference between revisions
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This article describes the OpenSees implementation of an effective stress site response analysis of a layered deposit of cohesionless soil underlain by an elastic half-space. A single column of soil is modeled in 2D (with periodic boundary conditions to emulate a 1D analysis) and is subject to an earthquake excitation. Nine node quadrilateral elements with both displacement and pore pressure degrees of freedom enable the model to track changes in pore pressure and effective stress during the earthquake excitation. A Lysmer-Kuhlemeyer (1969) dashpot is utilized to account for the finite rigidity of the underlying elastic medium. | This article describes the OpenSees implementation of an effective stress site response analysis of a layered deposit of cohesionless soil underlain by an elastic half-space. A single column of soil is modeled in 2D (with periodic boundary conditions to emulate a 1D analysis) and is subject to an earthquake excitation. Nine node quadrilateral elements with both displacement and pore pressure degrees of freedom enable the model to track changes in pore pressure and effective stress during the earthquake excitation. A Lysmer-Kuhlemeyer (1969) dashpot is utilized to account for the finite rigidity of the underlying elastic medium. | ||
Most of the details of this analysis are identical to those in the [[Site Response Analysis of a Layered Soil Column (Total Stress Analysis)| Total Stress Site Response Analysis of a Layered Soil Column]] example posted in the Practical Examples area of this manual. This article will emphasize the attributes which are particular to the effective stress analysis. The user is referred to the total stress example for further information on details which may be omitted or quickly explained here. | '''Note:''' Most of the details of this analysis are identical to those in the [[Site Response Analysis of a Layered Soil Column (Total Stress Analysis)| Total Stress Site Response Analysis of a Layered Soil Column]] example posted in the Practical Examples area of this manual. This article will emphasize the attributes which are particular to the effective stress analysis. The user is referred to the total stress example for further information on details which may be omitted or quickly explained here. | ||
Revision as of 22:56, 30 September 2010
Example posted by: Christopher McGann, University of Washington
!!!!UNDER CONSTRUCTION!!!!
This article describes the OpenSees implementation of an effective stress site response analysis of a layered deposit of cohesionless soil underlain by an elastic half-space. A single column of soil is modeled in 2D (with periodic boundary conditions to emulate a 1D analysis) and is subject to an earthquake excitation. Nine node quadrilateral elements with both displacement and pore pressure degrees of freedom enable the model to track changes in pore pressure and effective stress during the earthquake excitation. A Lysmer-Kuhlemeyer (1969) dashpot is utilized to account for the finite rigidity of the underlying elastic medium.
Note: Most of the details of this analysis are identical to those in the Total Stress Site Response Analysis of a Layered Soil Column example posted in the Practical Examples area of this manual. This article will emphasize the attributes which are particular to the effective stress analysis. The user is referred to the total stress example for further information on details which may be omitted or quickly explained here.