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Video | 3skeng Steelwork Tool
Online Manual RFEM | Surfaces
A steel bridge construction would have considerably overrun the budget, which is why a more economical solution using timber was found. The engineering office of Leonhardt, Andrä and Partner (LAP) from Stuttgart, Germany, in cooperation with the Bavarian glulam manufacturer HESS TIMBER, planned the constructed multi‑span bridge made of truss girders with a triangular cross‑section. LAP also did the structural analysis.
Fast + Epp, a customer of Dlubal Software, was responsible for the structural analysis of the timber construction. They used RFEM for testing purposes with regard to the internal forces and design of the timber structure.
Structural Planning | Timber Construction
Fast + Epp GmbH, Darmstadt, Germany
www.fastepp.com
Model of bridge in RFEM (© Fast + Epp GmbH)
Fast + Epp, a customer of Dlubal Software, was responsible for the structural analysis of the timber construction. They used RFEM for testing purposes with regard to the internal forces and design of the timber structure.
Structural Planning | Timber Construction
Fast + Epp GmbH, Darmstadt, Germany
www.fastepp.com
Model of bridge in RFEM (© Fast + Epp GmbH)
Timber Pedestrian Bridge
No Download Possible
Customer Project / View Only
| Number of Nodes | 2341 |
| Number of Lines | 3901 |
| Number of Members | 3878 |
| Number of Load Cases | 27 |
| Number of Load Combinations | 52 |
| Number of Result Combinations | 12 |
| Total Weight | 1196.702 tons |
| Dimensions (Metric) | 505.000 x 8.000 x 41.605 m |
| Dimensions (Imperial) | 1656.82 x 26.25 x 136.5 feet |
| Program Version | 4.10.19 |
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Customer Project
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In this article, the calculation of a timber panel wall with the beam panel thickness type is compared with a manual calculation.
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.
Plate girder is an economical choice for long spans construction. I-section steel plate girder typically has a deep web to maximize its shear capacity and flange separation, yet thin web to minimize the self-weight. Due to its large height-to-thickness (h/tw) ratio, transverse stiffeners may be required to stiffen the slender web.
When calculating regular structures, data input is often not complicated but time-consuming. Input automation can save valuable time. The task described in the present article is to consider the stories of a house as single construction stages. Data is entered using a C# program so that the user does not have to enter the elements of the individual floors manually.
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 consider the eccentricity of unsymmetrical line welds for the stress analysis in RFEM 6?
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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