The soil is defined by a number of borings each boring has multi-layers with different soil material (Figure A-5). Also variable thickness and discontinuous soil strata can be considered (Figure A-6). Loading and reloading of the soil modulus can be taken into account by the analysis (Figure A-7). Three different methods are used to determine the flexibility coefficients or the modulus of subgrade reaction:

1- Hand-Division of boring logs to nodes

2- Subareas method

3- Interpolation method

It is possible to draw soil layers by different symbols according to the German Standard DIN 4023 for easy identification. Also the limit depth of soil layers can be determined. Variable foundation levels can be considered in the analysis.


Figure A-5 The soil is defined by a number of borings


Figure A-6 Variable thickness soil strata


Figure A-7 Loading and reloading soil modulus are considered

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