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Frequently Asked Questions (FAQ)
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The IP address of the server can be found in the "Admin Control Center" (ACC) under the following address:
http: // localhost: 1947 / _int_ / devices.html
The IP address is displayed as soon as you move the mouse pointer over the server name (see Figure 01). If several dongle types are displayed, make sure that the vendor ID 48521 is displayed and the term "Key Type" includes the term "Net". -
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The Axis Axis Systems can be switched on and off by using the Project Navigator - Display. -
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One option in RSTAB 7 is to select the "File → Open" command. Then, you can display all files. Now select an RSTAB 8 file. This should then open.
In general, it is necessary that your colleague has to calculate the structure once more. This could lead to small deviations.
If your colleague only wants to check the model, it could also use the viewer. -
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The easiest way is to change to the design notes after the calculation or when the note appears in the design notes (see Figure 2). In this case, it is shown that the width of the end plate is not correct. When you change to input window 1.4.2, you quickly recognize in the graphic that it is not within the allowable range.This can be corrected very quickly by adjusting the horizontal bolt spacings (see Figure 3). -
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If a user-defined panel has already been created, this color scale is displayed in the Display Properties tab of the "Printout Report" tab under "Results" -> "Palette." If you set them as the default, the graphics in the report are updated automatically. -
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The shear area is calculated as follows:
${\mathrm A}_{\mathrm y}\;=\;\frac{{\mathrm I}_{\mathrm z}^2}{\int_{\mathrm A^\ast}\left({\displaystyle\frac{{\mathrm S}_{\mathrm z}}{\mathrm t^\ast}}\right)^2\operatorname d\mathrm A^\ast}$
${\mathrm A}_{\mathrm z}\;=\;\frac{{\mathrm I}_{\mathrm y}^2}{\int_{\mathrm A^\ast}\left({\displaystyle\frac{{\mathrm S}_{\mathrm y}}{\mathrm t^\ast}}\right)^2\operatorname d\mathrm A^\ast}$
These include:
I z or I y :2nd-order moment of area in relation to the axis z or y S z or S y : 1st degree moment of area in relation to the axis z or y t *: effective element thickness for shear transfer A *:
Surface Area Based on Effective Shear Thickness t *
The effective element thickness for shear transfer t * has a significant influence on the shear area. Therefore, the defined effective element thickness for shear transfer t * (Figure 1) of the elements should be checked.
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The option "Divide Line → Distance" has a fixed minimum limit of 0.50 mm. If you want to shorten a line (for ex 0.25mm), the line has to be divided to 1.00mm. Then, you can use the & quot; Divide Line → n Intermediate Node & quot; function to generate three intermediate nodes. Thus, you get a line length of 0.25mm.Important!
Each file combines nearby nodes that are closer together than 0.5mm. In the case mentioned above, you can adjust this with the function "Tools → Regenerate Model" (see Figure 02). -
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It might be advisable to (de) activate the hardware acceleration.In RSTAB and RFEM, you can activate or deactivate the hardware acceleration (OpenGL) by using the menu "Options" → "Program Options" in the "Graphics" dialog tab.
In addition, an improved smoothing (antialiasing) can be set in the same dialog box to prevent the edge effect. Both options are only activated after restarting the program.It could also be a problem that the graphics card driver is outdated. Under certain circumstances, this may lead to problems when using RSTAB and RFEM. I would therefore ask you to update the driver. -
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The setting in Figure 01 only controls the influence on the design side. After activating this function, the buckling designs in the "Effective Lengths" window are deactivated. Thus, only a lateral-torsional buckling analysis is performed.
In order to calculate with the design values of the stiffnesses, they have to be reduced by the partial safety factor according to [1] . To do this, select the marked option in the calculation parameters (see Figure 02).If the automatic combinatorics was used for the standard EN 1990 + EN 1995, this setting is automatically activated for combinations for the ULS according to the second-order analysis. For combinations for SLS, this option is automatically deactivated as well as for combinations generated according to the 1st order. However, the automatic assignment is only carried out by means of the calculation type in the "Combination Expressions" window (see Figure 03).If you want to calculate the component stiffnesses with the 5% quantile value of the stiffness parameters divided by the partial safety factor, you have to additionally activate the "Modify Stiffness" function in the calculation parameters and modify the stiffnesses manually. -
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In the first step, an automatic renumbering of the entire model should be carried out so that the later numbers are not used.Then, you can select the surfaces in groups and provide them with the desired number. It is possible to perform both a single and an automatic renumbering.
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First Steps
We provide hints and tips to help you get started with the main programs RFEM and RSTAB.
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