Knowledge Base

Useful Program Features

The Knowledge Base includes technical articles on a wide array of structural analysis and design topics.

These articles are intended to help you navigate through the Dlubal programs, learn efficient tips and tricks, and provide further insight into the program features.

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New 001549 Technical Article Timber Structures Concrete Structures Finite Element Analysis Nonlinear Analysis RFEM Modeling | Structure

Considering Slip Between Surfaces

This article deals with considering slip between surfaces with line hinges and line releases. Line hinges and line releases are used to consider slip between surfaces. Examples are joints in reinforced concrete structures or frame joints in cross-laminated timber structures.
New 001548 Technical Article Timber Structures RFEM RF-LAMINATE Design ANSI/AWC NDS

2018 NDS Updates for Cross-Laminated Timber Design

The American Wood Council (AWC) has released the 2018 Edition of the National Design Specification (NDS) for Wood Construction. This is the second edition of the NDS to contain a chapter dedicated to cross-laminated timber (CLT) design. Therefore, a couple of revisions were included in the 2018 NDS when compared to the previous 2015 Edition.
New 001547 Technical Article Concrete Structures Structural Analysis & Design RFEM RF-/FOUNDATION Pro RSTAB Design Eurocode 7

Determination of Bearing Resistance with "Drained" and "Undrained" Soil Conditions

The RF-/FOUNDATION Pro add‑on module designs single foundations (foundation plates, bucket and block foundations) for all support forces arising in the RFEM/RSTAB model. The geotechnical designs are performed according to EN 1997-1.
New 001546 Technical Article Buildings Structural Analysis & Design RFEM RF-/DYNAM Pro Modeling | Loading ASCE 7

Wind Loads on Circular Dome Roof Structures According to ASCE 7-16

When it comes to wind loads on building type structures per the ASCE 7, numerous resources can be found to supplement design standards and aid engineers with this lateral load application. However, engineers may find it more difficult to find similar resources for wind loading on non-building type structures. This article will examine the steps to calculate and apply wind loads per the ASCE 7-16 on a circular reinforced concrete tank with a dome roof.
New 001545 Technical Article Steel Structures Mechanical Engineering Aluminium & Lightweight Structures Cranes and Craneways Towers and Masts Steel and Timber Connections Finite Element Analysis Structural Analysis & Design RFEM RF-/FRAME-JOINT Pro RF-/JOINTS Modeling | Structure Eurocode 3

Modeling Joints as Surface Model

With RF-/FRAME-JOINT Pro, it is possible to design frame joints according to DIN 18800 or Eurocode 3. If it is about non-standardized joints or taking a closer look at the joint and its behavior, it is recommended to use the modeling as surface model. The following article will show how such a model is structured in principle.
New 001543 Technical Article Buildings Dynamic and Seismic Analysis RFEM RF-/DYNAM Pro Results ASCE 7

Determination of Story Drift According to ASCE 7-16 Under Seismic Loads

The story drift of a building provides valuable information about its structural behavior under seismic loads.
New 001542 Technical Article Concrete Structures Steel Structures Timber Structures Structural Analysis & Design RFEM RSTAB Modeling | Loading Eurocode 1

Determination of Wind Loads for Canopy Roof Structures According to EN 1991-1-4

If a canopy roof, for example a filling station roof, should be designed, a load determination having regard to Section 7.3 of EN 1991-1-4 is required. This article shows with an example the design of a slightly inclined troughed roof.
New 001541 Technical Article Concrete Structures Steel Structures Timber Structures Industrial and Plant Engineering Power Plants Dynamic and Seismic Analysis RFEM RF-/DYNAM Pro RSTAB Results ASCE 7

Consideration of P-Delta Effects (Second-Order Analysis) in the Response Spectrum Analysis According to ASCE 7-16

RFEM offers the option to perform a response spectrum analysis according to ASCE 7-16. This standard describes the determination of seismic loads for the US-American market. It might happen that the so-called P-Delta effect has to be considered due to the stiffness of the entire structure to be able to calculate the internal forces and carry out the design.
New 001560 Technical Article Building Information Modeling (BIM) RFEM Import / Export & BIM

Opportunities and Challenges of Structural Engineers When Using BIM

The bachelor thesis of Daniel Dlubal focuses on presenting and highlighting the chances, advantages and opportunities of BIM when performing structural analysis and design of buildings. The essential information of a structural analysis is shown and the data exchange between CAD and structural engineering software is explained in detail as well.
New 001540 Technical Article Bridges Cranes and Craneways Industrial and Plant Engineering Structural Analysis & Design RFEM RF-INFLUENCE Results

Basics to Determine and Evaluate Influence Lines

Influence lines have become less important nowadays due to the fast computer systems. However, it might be an advantage to use influence lines in the phase of preliminary design, but also in the actual creation of the structural designs. With the RF-INFLUENCE add-on module, it is possible to generate and evaluate influence lines and influence surfaces easily due to a fixed internal force. This technical article describes with a simple example the basics to determine and evaluate influence lines.