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Frequently Asked Questions (FAQ)
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AnswerYes, because a different GammaM factor according to DIN18008 is applied for the determination of the allowable limit stress for different glasses, it is also stored in our material library. However, the consequence is that by activating this option, the stiffness of the system is reduced by this factor.Especially when calculating solid loads (Climatic loads), the reduced stiffness of the system also affects the calculated stresses and deformations.
AnswerWhen you design glass with the RF-Glass add-on module, the layer structure is defined in the add-on module (Window 1.2). The layer structure in the main window of RFEM is irrelevant here, because the add-on module creates a temporary calculation model during the calculation. It is only important that the surface stiffness is set as glass (see Figure 1).The same applies to the support of the wall. It is also performed completely in RF glass.We already have an interesting webinar about RF glass with the topic "Design of Glass Structures in RFEM" on our website.
AnswerYes, in the 1.2 Layers tab, you can select the "Laminated safety glass" check box.As a result, the design value of the supporting resistance of the selected material is increased by a factor of 10%.
AnswerBy selecting the check box "Thermally toughened", the preload can be taken into account when calculating the resistance of the track.If the checkbox is selected, the formula (2) (8.3.6 / DIN18008-1: 2010-12) will be used, otherwise the formula (3) will be used.When selecting the material, a preselection is made by default, which however can also be customized.
AnswerIn the settings for the standard (DIN 18008), the design coefficient kc can be defined user-defined.In chapter 8.3.6 (DIN18008-1: 2010-12) this is given as 1.0, if no other parts of the standard are to be considered.Especially for line-mounted glazing, the coefficient of 1.8 for normal glasses and 1.0 for tempered glasses is given in chapter 7.2 (DIN18008-2: 2010-12).
AnswerUnfortunately, it is not possible to output the stresses of the marginal composite of an insulating glass panel in the form of a table or graphically in the module.An alternative way to determine the forces would be, for example, the evaluation of the bearing reactions.If one stores discs, then the corresponding force can be determined.
AnswerFor insulating glass with consideration of the shear bond is always calculated with solids. Switch off the shear bond, then you can calculate with area elements.
AnswerUnfortunately, it is not possible to perform the calculation with and without push group in a file. For each state a separate file must be created.
AnswerFor the surfaces type of stiffness "glass" no voltage is displayed in RFEM. The reason for this is that this stiffness type is only a placeholder for the add-on RF-glass module. This means that for the glass more inputs such. As layers, node bearings, edge bars and inputs to the load duration are necessary. These entries can be made in the add-on module RF-GLAS. The stresses, workloads and deformations per layer can also be evaluated in the add-on module (see Figures 1 and 2).
AnswerYes, you have to model the entire structure (shims, SZR and support) directly in RFEM.The slices can be designed in RF-Glas using the " global calculation method ".The only difficulty is that the stresses from the climatic loads can not be applied automatically, but have to be defined manually.To model, you can use the temporary model .
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