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Frequently Asked Questions (FAQ)
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There is an option for this in the Results navigator of RFEM 5.
After the calculation of a load case or a CO, you can switch to the Results navigator and select the "Load Distribution" result type.
Thus, you can display the load applied in the respective element. This can also be used very well for a graphical documentation of the load and printed as a graphic in the report.
AnswerNo, this is not possible.The member elastic foundation is basically constant over the length of the member.If you want to enter a variable member foundation based on the height of the bored pile, you have to divide the bored pile into individual members and specify different constant foundations on the individual members. Thus, the linear distribution of a foundation can be approximately simulated.
You can check the load application by using Project Navigator - Results → Load Distribution. In sections, the load distribution can be displayed graphically over the perimeter and the height.
Figure 01 shows the free variable load on a cylinder along the perimeter. Figure 02 shows the free variable load over the height. The load distribution can clearly be seen by the load distribution in the horizontal and vertical section.
A free variable load allows you to apply a load on surfaces that can vary in height and perimeter.
Figure 01 shows a circular container that is only loaded by more than a half of the perimeter in the surface normal direction. To define a load varying along the perimeter, it is necessary to activate the "Varying" option" under "Along perimeter." Click the corresponding button to enter the factors for the load including the angles where they occur. Furthermore, you can define the rotation axis. The factor kα creates a reference to the load value p of the initial dialog box.
As an alternative, it is possible to split the surface into the corresponding surface components. Subsequently, you can apply a surface load to the relevant surface components.
The container shown in Figure 01 has been modeled with two partial surfaces in Figure 02. Thus, it is possible to apply the surface load to the container half that should be loaded.
Yes, it is possible.When applying a new surface load, it is possible to set "Temperature" as a load type. Instead of applying the uniform load distribution, it is possible to apply the variable load distribution (for example, linear in Z).For the load values, you can specify whether the constant temperature or the delta temperature should be applied.This results in the following load specification:And the following results (deformation in this case):
This is possible: For this, select the "Temperature" load distribution for the member load and then specify trapezoidal variable distribution over the length and height of the cross-section.
AnswerFor example, the standard EN 1990 + EN1991-2; Road bridges could be used (see picture 1). Alternatively, one could of course also determine the combinations by hand. Further information can be found i.a. in our manual.
AnswerPlease check the entry of loads in the '1.4 Loading' dialog box in the 'Characteristic Values' tab.A possible source of the error is that you have selected individual load cases for the design (that is, for example, self-weight, wind, and so on). Or these load cases are additionally set as 'Permanent'. See Figure 01.Now, the program applies both load cases for the design of the first core width.This is not correct. The design of the first core width only requires the application of the load from one permanent action.For the design of the second core width, the load from a 'permanent and variable combination' is used. It means that you need either a load combination (CO) or a result combination (RC) for this. The entry of a load case (only wind here) is also wrong, since the favourably acting vertical component of the loading is missing. Therefore, you get too large foundations or have to enter a high loading as a 'permanent load' to meet the design.So if you should create a CO for this situation, in which the 'permanent and variable actions' are together and apply these for the design in FOUNDATION Pro, pay attention to the assignment of this CO to a 'permanent + variable action'. See Figure 02.
AnswerYou can find this setting in the module dialog box 1.4 Load in the 'Characteristic Values' tab.The design of the first core width applies the permanent actions. The design of the second core width applies the combination of permanent and variable actions.This means that you have to set which load should be selected for which action in the list of load cases or combinations for the design of highly eccentric loading in the core.
AnswerWhen a beam with variable cross-section dimensions is divided retroactively, the dimensions for the beam start and beam end can no longer be modified easily. Due to the resulting intermediate nodes, a new cross-section would have to be calculated for every member segment. In order for you to not have to do this manually, it is recommended to delete the members. In doing so, take care to only delete the selected members and not their nodes. The new member can subsequently be modelled from beam start to beam end and connected to the intermediate nodes with the "Connect Members" tool.Summary (see Figure 1):1. Delete members (nodes must remain unchanged)2. Insert new member from beam start to beam end3. Connect member with intermediate nodesIn RSTAB, the members always have to be connected to each other in a node.This is not absolutely necessary in RFEM, because it allows a node to lie on a line without dividing the member (see Figure 2). It is therefore sufficient to modify the cross-section at the beam start and beam end. If the intermediate nodes (which members already connect to) already exist and you wish to create the tapered member retroactively in RFEM, it is recommended to deactivate the option "Auto Connect Lines/Members" (see Figure 3). Afterwards the member can be created without divisions at the intermediate nodes.
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Wind Simulation & Wind Load Generation
With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.
The generated wind loads acting on these objects can be imported to RFEM or RSTAB.
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