SeleS for Windows: Software for Evaluating Seismic Load

SeleS for Windows uses its built-in seismic databases and calculation functions to investigate the seismic environment around your construction site, and it supports you in setting seismic loads (maximum amplitude, response spectrum, etc.) for seismic design.

Keywords

architectural design,ARTEQ,attenuation model,civil engineering design,database,Earthquake,fault,GIS,k-SHAKE+,k-WAVE,maximum amplitude,response spectrum

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Solution Overview

It is important to consider the seismic environment around a construction site, such as active faults and past earthquakes, if you need to set local seismic loads for seismic design. However, this requires specialized experience and long hours of work. SeleS for Windows is a software that brings together the GIS, expansive seismic database and suite of calculation functions that your assessment requires in a simple operation. It provides you a picture of the seismic environment around the construction site. Using its calculation functions, the software can also assess local seismic loads, including maximum amplitudes and response spectra.

Characteristics

  • Has map display function with GIS
  • Has reference to seismic databases
  • Add and saves new faults to the database
  • Offers a choice of three subsurface amplification factors
  • Calculates maximum amplitudes by scenario earthquakes based on past destructive earthquakes and seismic faults
  • Calculates return period values based on the destructive earthquake database
  • Offers a choice of 20 attenuation models to calculate maximum seismic amplitudes
  • Offers a choice of eight attenuation models to calculate response spectra
  • Calculates response spectra for multiple finite fault models based on Midorikawa and Kobayashi's method
  • Edits and outputs various graphs, such as return period, response spectrum, etc.
  • Outputs results as CSV or SeleS format files
  • Provides a three-dimensional display for seismic fault models that you set

Functions

SeleS for Windows assists you in setting seismic loads utilizing the following calculation functions.

Earthquake Database

The software contains databases of destructive earthquakes, active faults, and fault models, which are based on research papers and governmental public information. The fault models can be edited and added to the databases.

Calculating Maximum Seismic Amplitude

SeleS for Windows searches for active faults and past earthquakes around the construction site and estimates maximum amplitudes (acceleration and velocity) by the faults or earthquakes using attenuation models at the construction site. You can select from 20 attenuation models by Si and Midorikawa (1999), etc.
The results for maximum amplitude are listed in descending order, together with the name, scale, hypocentral distance and other information about the earthquake or fault.
Earthquakes and faults found using the search will be displayed on a map, so that you can instantly understand the seismic environment around the construction site.
You can also see detailed information by clicking on the earthquake or the fault on the map.

Calculating Return Period Value

Using information on past earthquakes from the database, SeleS for Windows performs a regression analysis on seismic strength at your construction site and evaluates the maximum amplitude values (acceleration and velocity) expected in a specified return period. You can select from any of four regression equations, such as the Gumbel distribution, and any of 18 attenuation models by Si and Midorikawa (1999), etc.
The results are shown in plots for each event location, and regression curves and expected values on a double exponential function graph for each earthquake are displayed.

Calculating Response Spectrum

SeleS for Windows evaluates the seismic response spectra by using various attenuation models at the construction site, and by setting seismic point sources, line sources, and finite fault models (expression of earthquake mechanism).
For calculations, you can also choose Midorikawa and Kobayashi's method, which accounts for spreads of finite fault planes and the amplification effect of deep subsurface structures at the construction site.
The results of the response spectra can be displayed in a tripartite graph, acceleration or velocity response spectrum graph or can even be plotted onto standard spectra.

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