Designed with Dlubal Software: Noise Protection Hangar for Airliners at Zurich Airport

Designed with Dlubal Software: Noise Protection Hangar for Airliners at Zurich Airport

Designed with Dlubal Software: Noise Protection Hangar for Airliners at Zurich Airport

By Andreas Hörold, Dlubal Software

Regular maintenance and repairs of an aircraft includes performing aircraft engine testing. For the protection of residents in nearby communities, Flughafen Zürich AG (FZAG) commissioned the planning of a noise protection hangar which goes beyond the legal requirements for noise protection.

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Gallery of impressive RFEM structures…

Gallery of impressive RSTAB structures…

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Dlubal RFEM 5 – Graphical Display of Local z Surface Sides

Dlubal RFEM 5 - Graphical Display of Local z Surface Sides

Dlubal RFEM 5 – Graphical Display of Local z Surface Sides

By Alexander Meierhofer, Dlubal Software

When calculating the surface reinforcement in RF-CONCRETE Surfaces, the result values for both surface sides +/- z are available. If you are not sure which side of a surface is the positive or the negative z side, you can hide the local coordinate system of each surface in the RFEM Project Navigator – Display under “Model” -> “Surfaces” -> “Surface Axis Systems x,y,z”. In the case of complex structures, this can quickly become confusing. Displaying multiple axis systems makes it difficult to recognize an incorrect direction of a surface, for example (see the figure on the top).

For a clearer representation, you can select a color display of the local surface sides in the Project Navigator – Display under -> “Colors According to” -> “+/- z Surface sides”. Because of the color display, it is possible to easily check the orientation of a surface. In the lower part of the figure, you can directly see that the circular wall has a negative surface side inside.

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Dlubal RFEM 5 & RSTAB 8 – Batch Processing of Multiple Files

Dlubal RFEM 5 & RSTAB 8 - Batch Processing of Multiple Files

Dlubal RFEM 5 & RSTAB 8 – Batch Processing of Multiple Files

By Sandy Matula, Dlubal Software

In RFEM and RSTAB, files can be automatically computed in a sequence of calculation, so the models can be processed overnight, for example.

The “Calculation” menu provides the following options for the calculation of results:
~ Calculate All Results of All Open Models
~ Calculate RFEM/RSTAB Results Only of All Open Models
~ Calculate Modules Results Only of All Open Models

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Dlubal RFEM 5 & RSTAB 8 – New Program Language Dutch

Dlubal RFEM 5 & RSTAB 8 - New Program Language Dutch

Dlubal RFEM 5 & RSTAB 8 – New Program Language Dutch

By Andreas Hörold, Dlubal Software

Due to the increasing number of users in the Benelux countries (currently more than 200 customers), we decided that it is important to implement Dutch as a program language in RFEM and RSTAB.

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Dlubal Software at the 5th International Timber Forum in Nancy, France

Dlubal Software at the 5th International Timber Forum in Nancy, France

Dlubal Software at the 5th International Timber Forum in Nancy, France

By Robert Vogl, Dlubal Software

On the 16th and 17th March 2015 the fifth “Forum Bois Construction” took place in the congress hall of Nancy. More than 1,000 participants followed the invitation into the metropolis of Lorraine. During the annual conference, projects were presented which show again how CLT can be used effectively for multi-storey constructions.

Dlubal Software SARL took part in the trade exhibition of the forum in order to present the timber solutions TIMBER Pro, RF-LAMINATE and RX-TIMBER. One renowned visitor of the exhibition was Shigeru Ban. The Japanese architect was significantly involved in the conceptual design of the Centre Georges Pompidou in Metz (PDF: https://www.dlubal.com/en/download/examples/rstab_centre_georges_pompidou-metz_en.pdf).

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Dlubal RFEM 5 – New Add-on Module RF-FORM-FINDING

Dlubal RFEM 5 - New Add-on Module RF-FORM-FINDING

Dlubal RFEM 5 – New Add-on Module RF-FORM-FINDING

RF-FORM-FINDING finds the shapes of membrane and cable constructions. The shape is found by using the equilibrium between the surface stress (loading prestress) and the natural and geometrical boundary reactions. In the subsequent static analysis, the new form will be calculated taking into account the geometrically nonlinear method of analysis according to third order analysis (large deformation analysis).

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Dlubal RFEM 5 – Adjusting Direction of Finite Element Axis from Surfaces to Lines

Dlubal RFEM 5 - Adjusting Direction of Finite Element Axis from Surfaces to Lines

Dlubal RFEM 5 – Adjusting Direction of Finite Element Axis from Surfaces to Lines

By Ulrich Lex, Dlubal Software

It is often necessary to adjust the FE mesh of surface elements to the geometric structure. RFEM provides various options for this. For example, the FE axis can be rotated about a point, aligned in the direction of a point, or orientated to a user-defined coordinate system. Another option is the direction parallel to a line, and particularly in this case, it is possible to enter or select several lines.

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Dlubal RFEM 5 – Reduction of Loads Generated in RF-MOVE Surfaces Using RF-INFLUENCE

Dlubal RFEM 5 - Reduction of Loads Generated in RF-MOVE Surfaces Using RF-INFLUENCE

Dlubal RFEM 5 – Reduction of Loads Generated in RF-MOVE Surfaces Using RF-INFLUENCE

By Adrian Langhammer, Dlubal Software

For the reduction of loads generated in RF-MOVE Surfaces, it is possible to consider influence surfaces of a selected point. The influence surfaces are determined by RF-INFLUENCE. This procedure is useful in cases where only unfavorable acting loads should be considered. Depending on the unfavorable action, you should select the positive or negative direction.

In the example shown in the figure, there are loads to be generated on a system of two continuous panels, which cause negative deformation in the middle of the first panel. Considering this, RF-MOVE Surfaces creates the loads only in the second panel along the selected line.

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Dlubal RFEM 5 – Design of Curved Chair in RF-LAMINATE

Dlubal RFEM 5 - Design of Curved Chair in RF-LAMINATE

Dlubal RFEM 5 – Design of Curved Chair in RF-LAMINATE

By Bastian Kuhn, Dlubal Software

In RF-LAMINATE, it is possible to design also curved quadrangular surfaces. In the example in the figure, the cross-laminated timber layers of a chair are designed.

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Dlubal RFEM 5 – Consideration of Effects From Second Order Theory in RF-FOUNDATION Pro

Dlubal RFEM 5 - Consideration of Effects From Second Order Theory in RF-FOUNDATION Pro

Dlubal RFEM 5 – Consideration of Effects From Second Order Theory in RF-FOUNDATION Pro

By Paul Kieloch, Dlubal Software

In RFEM and RSTAB, the internal forces of individual load combinations are determined according to the second-order analysis by default. If you use the RF-CONCRETE add-on module for stability analysis of reinforced concrete columns, you can change the calculation method of LCs to the linear static analysis, since the effects of the second-order analysis are already considered in the calculation according to the model column method in RF-CONCRETE Columns (nominal curvature method).

In the case of using the results of such load combinations for design in RF-FOUNDATION Pro, the effect of the second-order analysis is missing in the foundation design. The reason is that the RF-FOUNDATION Pro module uses support reactions of individual LCs for the design.

In order to consider the support moments according to the second-order analysis anyway, RF-FOUNDATION Pro provides the option to affect the support moments according to the linear static analysis by a user-defined factor. You can enter these increment factors separately for both design directions in the “Details” dialog box of the RF-FOUNDATION Pro add-on module. Please note that this entry applies to the entire design case.

If there is a moment applied with a certain factor, it will be recorded in the design details and in result tables of the printout report by entering the multiplication factor.

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