GGU-LATPILE: "New" menu item
- Matthias Jusko
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.
In the next group box, the radio buttons are used to specify which safety concept to use for analysis and design. The analysis can be carried out using either the subgrade reaction modulus method or the p-y method. Using the p-y method, you also select the type of load (static or cyclic). Here you can also activate the earth support analysis.
Next, you can activate the display of the passive side to the right. If the "Label passive and active sides in graphics" check box is activated, both sides are labelled at the bottom of the system.
If you select the "Use absolute heights" check box, you can enter all depths and heights in mAD (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. Thanks to WYSIWYG there is no danger of using incorrect data since all input is immediately visible on the screen. In this example and the following explanations of this manual the check box "Use absolute heights" is not selected.
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 (see menu item “Graphics preferences/Soil properties legend”).
In the following "Subgrade reaction modulus" group box you can select kN/m³ or MN/m³ as the dimension. The dimensions can also be modified directly in the "Editor 2/Subgrade reaction moduli" menu item dialog box. In accordance with EAB EB 102 the subgrade reaction modulus can be calculated from the constrained modulus. Activate the corresponding check box in the "Subgrade reaction modulus" section and enter the constrained modulus under "Editor 1/Soils". The subgrade reaction modulus can also be defined in accordance with DB Guideline 804.5501.
Below this, a pile inclination between -6° and +6° can be defined. Please read the information displayed after pressing the "?" button.
In the "Steel design:" group box, you can choose whether a section from the section list loaded by the program should be selected to design a steel pile, or whether you wish to design a steel pile with differing sections. If you work with the section list, the search for the optimum section in the list is performed automatically. The section list is loaded automatically when the program starts. However, you can expand and edit this list to suit your requirements. Steel design should always follow EC 3.
The type of pile to be analysed is specified using the buttons in the lower group box. If you decide to use a different pile type during a project, simply select the menu item "File/New" and switch to the new pile type. Previously entered system data is retained!
If you select "Bored pile", subsequent design to EC 2 will assume a circular cross-section. If you select "Square pile", subsequent design to EC 2 will assume a square cross-section. The information regarding "From section list" is irrelevant for "Bored pile", "Unreinf. bored pile" and "Square pile".
If you have changed to partial safety factor concept in the uppermost group box, you will see a further dialog box for specifying the partial factors after clicking the required pile type. Using the "Default values" button, you can accept the partial factors given in DIN 1054:2010 or EC 7 for the different load cases. The partial factors entered can be edited at any time using the "Editor 1/Partial factors + Sum V" menu item.