GGU-UNDERPIN: "New" menu item
You can enter a new system using this menu item. You will see the following dialog box:
You can enter a dataset description ("Project identification") of the problem going to process, which will then be used in the General legend. This can be particularly useful when you are working with the menu items "Construction phases/Select files" and "Editor 2/Predeformation preferences". Using these program functions previously saved datasets are appended to the current dataset. The existing project identifications are also shown in the appropriate dialog boxes to aid file characterisation.
In the next group box, the radio buttons are used to specify which safety concept to use for analysis and design.
The default analysis of the unreinforced concrete is performed compliant with EC 2/DIN 1045-1. By default the shear analysis is performed compliant with DIN 4093 using the simplified equation τE,d = 1.5 · QE,d/Av ≤ 0.2 · fm,d. However, you may also calculate without a shear analysis or, when applying EC 2, perform shear analysis using principal stresses compliant with DIN 4093.
Alternatively, you can analyse the unreinforced concrete based completely on DIN 4093:2012-08. This then also includes the shear analysis using principal stresses. Depending on the system, analysis without principal stresses may return more favourable values. You may therefore also deactivate this analysis.
Additionally, excavation visualisation to the right can be activated. DIN 1054:2005 states that an overturning analysis may be dispensed with for Load Case 3 if sufficient bearing capacity has been demonstrated. This rule is no longer included in Eurocode 7; it is therefore always necessary to perform an overturning analysis. In justified exceptional cases, however, the analysis may be turned off using the "Do not investigate overturning" check box.
If you select the "Use absolute heights" check box, you can enter all depths and heights in m AD (heights are positive upwards). If this check box is not selected, the top of the wall is assumed to have a height of 0.0 and all further entries, depth of soil layers, for example, are positive downwards.
If your system uses differing soil properties on the active and the passive sides, activate the "Differentiate active + passive soil properties" check box in the above dialog box. You will then be presented with different input columns for entering the active and passive friction angle and unit weight soil properties in the "Editor 1/Soils" menu item. For better visualisation you can define the soil colours on the active and the passive sides differently using the Soil properties legend.
In the lower group box, you can select the new regulations concerning the equivalent wall compliant with EAB 6th Edition. The new regulations are described in "Bautechnik Issue 8 (2020)".
If the safety concept has been altered using the "File/New" dialog box, the dialog box for specifying either the safety factors or the partial factors always opens after leaving the dialog box by clicking "OK". These dialog boxes can also be accessed via the menu items "Editor 1/Verifications/ Safety factors" or "Editor 1/Verifications/Partial factors". Verifications and safety factors can be modified at any time using the above menu items.