Knowledge Base

Useful Program Features

The Knowledge Base contains technical articles on “Structural Analysis” which may support you in your daily work.

Furthermore, you get handy tips and tricks for your work with RFEM / RSTAB, the add‑on modules as well as the stand‑alone programs.

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New 001524 Technical Article Concrete Structures RFEM RF-PUNCH Pro Design Eurocode 2

Punching Shear Design with Definition of Perimeters

With RF-PUNCH Pro, the punching shear design can be performed according to 6.4, EN 1992-1-1. In the following example, the design according to DIN EN 1992-1-1 will be presented first with automatic design of the inner and outer perimeters and then on the basis of the inner perimeters defined by the user on a simple example.
New 001523 Tips & Tricks Steel Structures RFEM RSTAB RF-/STEEL EC3 Design Eurocode 3

Consideration of Holes in Tension Design

For the tension design according to Clause 6.2.3 EN 1993-1-1, the following formulas are given to determine the tension resistance.

$\begin{array}{l}\mathrm{Equation}\;6.6:\;{\mathrm N}_{\mathrm{pl},\mathrm{Rd}}\;=\;\frac{\mathrm A\;\cdot\;{\mathrm f}_\mathrm y}{{\mathrm\gamma}_{\mathrm M0}}\\\mathrm{Equation}\;6.7:\;{\mathrm N}_{\mathrm u,\mathrm{Rd}}\;=\;\frac{0.9\;\cdot\;{\mathrm A}_\mathrm{net}\;\cdot\;{\mathrm f}_\mathrm u}{{\mathrm\gamma}_{\mathrm M2}}\end{array}$
New 001522 Technical Article Steel Structures Finite Element Analysis RFEM Modeling | Structure Eurocode 3

FEM Modeling Approaches of Rigid Connections

Especially when the adjacent area of connection points should be analyzed, the geometry or load of the connection does not correspond to the standard specifications and/or a structure should be analyzed with an FE model (for example in plant engineering), it is necessary to evaluate the connections in detail on the FE model.
New 001521 Technical Article Dynamic and Seismic Analysis RF-/DYNAM Pro Add-on Modules Eurocode 8

Determination of Transversal Shear Under Seismic Loads

In RF-/DYNAM Pro - Equivalent Loads, the equivalent seismic loads can be calculated according to different standards. By calculating the equivalent loads for each eigenvalue, it is not directly possible to obtain the transversal shear for each story to perform an analysis afterwards. The following example describes the option to calculate the transversal shear quickly and efficiently.
New 001520 Technical Article Structural Analysis & Design RFEM RSTAB Modeling | Structure

Explanation of Support Nonlinearities on Example | 2.1 Rotation

In practice, an engineer often faces the task of representing the support conditions as close to reality as possible in order to be able to analyze deformations and internal forces of the structure subjected to their influence and to enable as much cost‑efficient construction as possible. RFEM and RSTAB offer numerous options for defining nonlinear nodal supports. This second part describes the options for creating a nonlinear support for a restraint and provides a simple example. For better understanding, the result is always compared to a linearly defined support.
New 001519 Technical Article Cranes and Craneways CRANEWAY Stand-Alone Programs Eurocode 3

Design for the Lower Flange of Suspension Cranes According to DIN EN 1993-6

For suspension cranes, the bottom chord of the runway girder is subjected to local flange bending due to the wheel loads in addition to the main load bearing capacity. The bottom chord behaves like a slab due to these local bending stresses and has a biaxial stress condition [1].
New 001518 Technical Article Concrete Structures RFEM RF-CONCRETE Design Eurocode 2

Design of Big Openings in Beams and Downstand Beams

Since the ultimate limit state of beams in the area of openings is affected, particular attention should be payed to this. In general, small openings can be sufficiently covered by adapting the beam structure to the openings. For big openings, it is necessary to consider and model the area separately.
New 001517 Tips & Tricks RFEM RSTAB Modeling | Loading Eurocode 1

Consideration of the Correlation with Wind Loads

If the wind load for buildings or structures is to be determined by the simultaneous assumption of aerodynamic pressure and suction coefficients on the windward and leeward sides of the building, the correlation of the wind pressure on zones D and E of the wall surfaces may be taken into account.
New 001516 Technical Article Steel Structures Steel and Timber Connections RFEM RF-/JOINTS Modeling | Structure Eurocode 3

Modelling and Design of Pinned End Plate Connection

RFEM offers the following possibilities to design a pinned end plate connection. Firstly, there is the possibility in RF-JOINTS Steel - Pinned to enter the corresponding parameters quickly and easily to receive a documented analysis including graphics. It is also possible to model such a connection individually in RFEM and then to evaluate or manually design the results. In the following example, the particularities of this modelling will be explained and the shear forces of the bolts will be compared to the corresponding results from RF-JOINTS Steel - Pinned.
New 001515 Technical Article Building Information Modeling (BIM) RFEM RSTAB RF-COM/RS-COM Import / Export & BIM

COM Interface in VBA | 5. Creating a Tool to Copy and Move Guidelines

RF-COM/RS-COM is a programmable interface which allows the user to expand the main programmes RFEM and RSTAB by customized input macros or post‑processing programmes. In this article, a tool to...