New Products
GeoFEAS2D Ver.4 FEM Analysis
Supports "Chapter II Embankment, Explanations and Guidelines for Quake-Resistance Testing of River" March 2016 Edition
●New License Price
●Release date		 US$6,500
Apirl 2017
GeoFEAS is 2D Geotechnical Finite element Elastoplastic Analysis Software for stress-deformation analysis of soil under static conditions.

Ver. 4.0 has just been released with improvements of the following features. This article summarizes each of these features.
  • The program now supports the March 2016 Edition of "Chapter II Embankment, Explanations and Guidelines for Quake-Resistance Testing of River" issued by Japan Ministry of Land, Infrastructure, Transport and Tourism
  • Supports soil liquefaction analysis that takes into account compressive deformation of soil.
Supports soil liquefaction analysis based on the March 2016 Edition of "Chapter II Embankment, Explanations and Guidelines for Quake-Resistance Testing of River"
Soil liquefaction analysis based on the March 2016 Edition of " Guidelines for Quake-Resistance Testing of River" established by Water and Disaster Management Bureau, Japan Ministry of Land, Infrastructure, Transport and Tourism is feasible. "Deformation analysis prior to an earthquake (before liquefaction)", "Deformation analysis after an earthquake (after liquefaction)", and "Amount of land subsidence (deformation analysis) caused by bulk compression of liquefaction layer" can all be assigned to each stage of the analysis for a very thorough analysis. 

Self-weight induced deformation analysis involves deformation analysis before an earthquake (before liquefaction)" and deformation analysis after an earthquake (after liquefaction), and then taking the difference of the results from each analysis to compute the amount of land subsidence caused by liquefaction. The amount of land subsidence (deformation analysis) caused by the bulk compression of the liquefaction layer is calculated separately to the deforamtion analysis before and after an earthquake. By adding the value for the amount of land subsidence caused by the bulk compression of the liquefaction layer to the value for the amount of land subsidence caused by liquefaction, the overall displacement of the model of interest can be determined.		   Click to enlarge the image.
Fig. 1 Work flow of deformation analysis

Click to enlarge the image. Click to enlarge the image.
Fig. 2　Results showing Factor of Safety for Liquefaction (FL) Fig. 3 Results showing the amount of land subsidence
　Soil liquefaction analysis that takes into account consolidation due to compression
The new and improved version of GeoFEAS2D can be linked with "Consolidation Settlement Calculation", another popular UC-1 Series product, to take into account consolidation due to compression (consolidation settlement and immediate settlement) when performing liquefaction analysis. Consolidation Settlement Calculation program allows users to set up a complete scenario of consolidation settlement from the creation of soil geometry and assignment of soil layers and vertical load to the calculation of the settlment due to consolidation. The soil model created with its soil geometry and soil layers defined, and subjected to vertial load for consolidation settlement calculation using Consolidation Settlement Calculation program can be imported to GeoFEAS2D for a seamless soil liquefaction analysis.

Click to enlarge the image.
Fig. 4　Assessment on the influenece of sunshine obstruction on site soils

These are the new features that will be introduced in the new version of GeoFEAS2D. We will continue to collect customer demands and continue to improve and perfect ourselves.
(Up&Coming spring 2017 issue）
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