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With an area of 110,000 ft², the North Surrey Sports and Ice Complex includes three ice stadiums, event rooms, restaurants, and outdoor areas. StructureCraft, a customer of Dlubal Software, was selected as the structural engineer and builder of the roof structure...
StructureCraft Builders Inc., Canada
www.structurecraft.com
Model (top) and 1st mode shape (bottom) of a hybrid roof truss in RFEM (© StructureCraft Builders Inc.)
StructureCraft Builders Inc., Canada
www.structurecraft.com
Model (top) and 1st mode shape (bottom) of a hybrid roof truss in RFEM (© StructureCraft Builders Inc.)
Hybrid Roof Structures Made of Steel and Timber
No Download Possible
Customer Project / View Only
| Number of Nodes | 206 |
| Number of Lines | 210 |
| Number of Members | 210 |
| Number of Load Cases | 7 |
| Number of Load Combinations | 3 |
| Total Weight | 5.248 tons |
| Dimensions (Metric) | 54.154 x 0.500 x 7.475 m |
| Dimensions (Imperial) | 177.67 x 1.64 x 24.52 feet |
| Program Version | 5.18.01 |
Length: 00:02:15 min
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Length: 00:00:56 min
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The previous article, titled Lateral-Torsional Buckling in Timber Construction | Examples 1, explains the practical application for determining the critical bending moment Mcrit or the critical bending stress σcrit for a bending beam's lateral buckling using simple examples. In this article, the critical bending moment is determined by considering an elastic foundation resulting from a stiffening bracing.
The article titled Lateral-Torsional Buckling in Timber Construction | Theory explains the theoretical background for the analytical determination of the critical bending moment Mcrit or the critical bending stress σcrit for the lateral buckling of a bending beam. This article uses examples to verify the analytical solution with the result from the eigenvalue analysis.
As an alternative to the equivalent member method, this article describes the possibility to determine the internal forces of a wall at risk of buckling according to the second-order analysis, taking imperfections into account, and to subsequently perform the cross-section design for bending and compression.
The following article describes a design using the equivalent member method according to [1] Section 6.3.2, performed on an example of a cross-laminated timber wall susceptible to buckling described in Part 1 of this article series. The buckling analysis will be performed as a compressive stress analysis with reduced compressive strength. For this, the instability factor kc is determined, which depends primarily on the component slenderness and the support type.
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".
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)
You have the option to perform the fire resistance design of surfaces using the reduced cross-section method. The reduction is applied over the surface thickness. It is possible to perform the design checks for all timber materials allowed for the design.
For cross-laminated timber, depending on the type of adhesive, you can select whether it is possible for individual carbonized layer parts to fall off, and whether you can expect increased charring in certain layer areas.
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Among others, the following cross-laminated timber manufacturers are available in the layer structure library:
- Binderholz (USA)
- KLH (USA, CAN)
- Kalesnikoff (USA, CAN)
- Nordic Structures (USA, CAN)
- Mercer Mass Timber
- SmartLam
- Sterling Structural
- Superstructures listed in Lignatec Edition 32 "Cross-Laminated Timber of Swiss Production"
By importing a structure from the layer structure library, all relevant parameters are adopted automatically. The library is continually updated.
Is it possible to import effective lengths from RF‑STABILITY or RSBUCK in RF‑/TIMBER Pro?
How can the NDS and CSA O86 factors be manually adjusted for consideration in the Timber Design add-on?
What calculation is carried out for the NDS Strength Configuration "Calculation of Torsion" options?
Which Dlubal software products do you recommend for the structural analysis and design of timber structures in particular?
How can I model a timber beam with stiffening on both sides? (splice)
How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?
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