k-SHAKE+ for Windows: Seismic Response Analysis Software for Horizontal Layered Structures

Our seismic response analysis software, k-SHAKE+ for Windows, supports a wide range of analyses for horizontal layered subsurface structures, based on an equivalent linear analysis method and time-history nonlinear analysis method.


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Solution Overview

k-SHAKE+ for Windows was developed to perform one-dimensional seismic response analyses for subsurface structures. It contains analytic functions of an equivalent linear analysis method based on the multiple reflection theory (basic function) and a time-history nonlinear analysis method using a direct integration method (optional function).


  • Visual confirmation of one-dimensional structure models
  • Equivalent linear analysis based on the multiple reflection theory and time-history nonlinear analysis using a direct integration method are built in as a one-dimensional seismic response analysis
  • Strain dependence characteristics are set and managed by users as a database
  • Multiple strain dependence characteristics based on research papers and Japanese governmental public information
  • Built-in multiple restoring force characteristics, such as modified R-O model, H-D model, Ishihara-Yoshida method, etc.
  • Allows you to input Rayleigh-type viscous damping
  • Liquefaction evaluation function based on the Japanese government's guidelines
  • Outputs the results as CSV or the program's fixed format files
  • Functions allowing you to edit and output various graphs relevant to the seismic response analysis
  • Capable of reading result files from ARTEQ for Windows

Equivalent Linear Analysis Using SHAKE (basic function)

When you perform an equivalent linear analysis using the SHAKE program, a one-dimensional subsurface structure is treated as a continuum. The seismic wave response in the frequency domain is calculated using the multiple reflection theory. In the equivalent linear analysis, the nonlinearity of the subsurface structure is approximately calculated, using the calculated average physical characteristic values of the structure.
Users can easily check the physical characteristics of the subsurface structure and output-positions visually on a screen before and after the analysis.
There are also functions that allow you to plot results, evaluate liquefaction, etc.

Nonlinear Time History Analysis (optional function)

During time-history nonlinear analysis, a one-dimensional subsurface structure is assumed to be the discrete model of a multi-mass shear spring model. Seismic wave response is then calculated by solving the equation of motion using a direct integration method in a time domain. Because analysis is done in a time domain, the software takes into consideration the changes in the structure's physical characteristics during an earthquake, which can be applied to a relatively large strain. As an option, Rayleigh-type viscous damping and select linear or nonlinear restoring force characteristics, e.g., modified R-O model, etc., can be used.

For More Information

Engineering Consulting Sales Dept.

TEL: +81-(0)3-5342-1136

E-Mail: kaiseki@kke.co.jp

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