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000920

2024-10-03

Ideal Shear Stiffness of Stiffening Bracing

Ideelle Schubsteifigkeit des Aussteifungsverbandes

s_{id} = E_{D} \cdot A_{D}' \cdot \sin {(α)}^{2} \cdot \cos (α)

s_id	Ideelle Schubsteifigkeit des Aussteifungsverbandes
E_D	5 % Quantile des Elastizitätsmoduls der Diagonalen
A_D'	Fiktive Querschnittsfläche der Diagonalen
α	Winkel zwischen der Diagonalen und der Gurte

Ideal shear stiffness

Events

2025-05-21

Online Training

RFEM 6 | Students | Introduction to Timber Design

Videos

KB 001714 | Timber Beam-Column Design per NDS 2018 Using RF-/TIMBER AWC Module

Duration: 00:00:58 min

KB 001714 | Timber Beam-Column Design per NDS 2018 | RF-/TIMBER AWC

Duration: 00:01:02 min

Knowledge Base

KB 001669 | Lateral-Torsional Buckling in Timber Construction | Examples 2

Duration: 00:02:15 min

FAQ

FAQ 004813 | How can I perform a stability analysis for a tapered member?

Duration: 00:00:52 min

FAQ

FAQ 004626 | Can I design laminated veneer lumber with RFEM/RSTAB?

Duration: 00:01:58 min

Knowledge Base

KB 001641 | Calculating Timber Panel Walls | 4. Wall Design

Duration: 00:00:31 min

General

KB 001674 | Timber Column Design per the 2018 NDS Standard

Duration: 00:02:07 min

General

Dlubal RFEM 5 - Timber Design According to American Standard ANSI/AWC NDS-2012 with RF-TIMBER AWC

Duration: 00:05:26 min

Timber Structure Analysis with Special Shapes Using Member and Surface Analysis

General

Webinar | Special Shapes in Timber Structures – Differences Between Member and Surface Analysis

Duration: 00:44:46 min

Playlist

Models to Download

793x

70x

Timber Beam-Column

3369x

146x

Timber Truss Girder for Lateral-Torsional Buckling Analysis

Single-Span Beam with Lateral and Torsional Restraint and Without Intermediate Lateral Restraints

2057x

59x

Single-Span Timber Beam with Lateral and Torsional Restraint

6825x

330x

Timber Curved Glulam Structure

KB 001848 | Timber Column Design as per 2018 NDS Standard in RFEM 6

441x

Timber Column for KB 1884

Snow, wind, and passenger load-resistant summit station of 3S cable car.

86x

3S Cable Car – Mountain Station at 3,200 m Above Sea Level

Model of a cable car station designed to resist wind and snow loads.

50x

3S Cable Car – Intermediate Station at 2,600 m Above Sea Level

3D structural model of a 3S cable car station, showing wind and snow loads.

49x

3S Cableway – Departure Station at 1,600 m Above Sea Level

Lightweight timber-framed building | Modular timber structure

212x

69x

Timber Frame Walls in Building

Knowledge Base Articles

Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.

In this article, the adequacy of a 2x4 dimension lumber subject to combined biaxial bending and axial compression is verified using the RF-/TIMBER AWC add-on module. The beam-column properties and loading are based on example E1.8 of AWC Structural Wood Design Examples 2015/2018.

The previous article Lateral-Torsional Buckling in Timber Construction | Examples 1 explains the practical application for determining the critical bending moment M_crit or the critical bending stress σcrit for a bending beam's lateral-torsional buckling by using simple examples. In this article, the critical bending moment is determined by considering an elastic foundation resulting from a stiffening bracing.

This article describes the design of timber panel walls due to generated horizontal loads.

Screenshots

Modeling Curved Member

Bending Stress Distribution Along Beam Depth for Curved Members

Comparison of Bending Stresses on Member Model and Surface Model (FEA)

Evaluation in RF-/TIMBER AWC

Generation of Transversal Tension and Transversal Compression Stresses in Curved Area

FEA of Transversal Tension Stresses (Top) and Transversal Compression Stresses (Bottom)

Evaluating Design of Transversal Tension (Left) and Transversal Compression (Right)

Result Beams with Integration Areas (Top), Tensile Forces in Stiffening Elements (Bottom)

KB 001848 | 2018 NDS Timber Column Design in RFEM 6

RFEM 6 – Timber Design Results

Product Features

Feature 002901 | Plywood Materials According to ANSI/APA PRG 510 Plywood Standard (USA/CAN) in RFEM Material Library

In the material library of RFEM, you can find plywood materials according to the US and Canadian standards ANSI/APA PRG 510 Plywood (USA/CAN).

For the fire resistance design of timber surfaces, you can display a charring diagram depending on the time of fire exposure.

It is also possible to print this charring diagram into the printout report.

Go to Explanatory Video

Feature 002824 | OSB Material for USA and Canada

In RFEM, the oriented strand board (OSB) material is available for the USA and Canada. The material parameters are taken from the "Panel Design Specification manual".

Feature 002792 | Visualization of a timber panel element, modeled with the Beam Panel thickness type for structured 3D models.

Using the "Beam Panel" thickness type, you can model timber panel elements in 3D space. Simply specify the surface geometry and the timber panel elements are automatically generated using an internal member-surface construct, including the element connection stiffness. The Beam Panel thickness type is defined using the Multilayer Surfaces add-on.

A "beam panel" provides you with the following advantages:

Single-sided or double-sided sheathing
Automatic calculation of a semi-rigid coupling between studs and sheathing
- Nailed sheathing connection
- Stapled sheathing connection
- User-defined sheathing connection
Representation as a complete geometric 3D object (frame, studs, surface, etc.), including eccentricity and automatically calculated stiffness between elements
Consider openings via surface cells
Design of the individual structural elements utilizing the Timber Design add-on (full shear wall design planned for a future release)
Other material options available (e.g., particle board, gypsum, or fiberboard sheathing with cold-formed steel sections)