Knowledge Base

The CSA S16:19 Stability Effects in Elastic Analysis method in Annex O.2 is an alternative option to the Simplified Stability Analysis Method in Clause 8.4.3. This article will describe the requirements of Annex O.2 and application in RFEM 6.

In recent years, there has been a rise in interest in the use of computational fluid dynamics, known as CFD, for the design of wind-susceptible structures. This is due to the fact that advancements in computer power have made the solution to complicated flow problems relatively inexpensive. The size of the computational domain is an important aspect that has a significant impact on the accuracy as well as the cost of CFD simulations.

The Nonlinear Material Behavior add-on enables the consideration of material nonlinearities in RFEM 6. This article provides an overview of the available nonlinear material models, which are available after activating the add-on in the model’s Base Data.

This article will show you the design of cold-formed steel cross-sections according to EN 1993-1-3, Section 6.1.6 in RFEM 6. Since the topic is still under development, the currently available options will be presented.

This article shows how the “Time-Dependent Analysis” add-on is integrated in RFEM 6 and RSTAB 9. It describes how to define input data such as the time-dependent characteristics of the material, how to determine the type of analysis and how to specify loading times.

With the most recent ACI 318-19 standard, the long-term relationship to determine the concrete shear resistance, V_c, is redefined. With the new method, the member height, the longitudinal reinforcement ratio, and the normal stress now influence the shear strength, V_c. This article describes the shear design updates, and the application is demonstrated with an example.

In computational fluid dynamics (CFD), complex surfaces that are not completely solid can be modeled using porous or permeability media. In the actual world, examples of such things include windbreak fabric structures, wire meshes, perforated facades and claddings, louvers, tube banks (stacks of horizontal cylinders), and so on.

As for the previous generations of Dlubal programs, an integrated interface with Autodesk Revit is now also available for RFEM 6 and RSTAB 9. This article provides some general information about the interface as well as the Dlubal-relevant structural objects and parameters in Revit.

Spreadsheet programs like MS EXCEL are very popular with engineers because they allow you to simply automatize your calculations and quickly output the results. Therefore, combining MS EXCEL used as a graphical interface with Dlubal's WebService API is an obvious choice. By means of the free xlwings library for Python, it is possible to control MS EXCEL as well as read and write values. The functionality is described in the following, using an example.

This paper written by Mahyar Kazemian, Sajad Nikdel, Mehrnaz MohammadEsmaeili, Vahid Nik and Kamyab Zandi is related to an ongoing project for which a structural digital twin of the Kalix bridge in Sweden is being developed and implemented. The overarching goal of the current paper is to present a method for and study the results of quantifying structural loads resulting from extreme climate events based on future climate scenarios for the Kalix bridge.