Additionally, the complete prefabrication of the CLT panels reduced the assembly time to only 6 weeks. Thermal bridging was also reduced, which increased the moisture control of the panels to ensure an optimal indoor climate.
Dlubal customers EGOIN and Estudi M103 SLP worked together under the direction of Blazquez Guanter SLP to bring out the very best in the design process. For this purpose, both RFEM software and the RF-LAMINATE add-on module were used to consider the orthotropic stiffness and strength within the whole structural analysis model during the material design. CLT has the capacity to withstand bidirectional loads, which help to increase the stiffness compared to a uniaxial structural system.
In RFEM, line hinges based on actual connection stiffness of the slab, including nonlinear behavior, can be considered in a simple way. The line force diagrams were also produced in RFEM for further consideration in the RF-LIMITS add-on module when designing the connections. The RF-DYNAM Pro add-on module was utilized to calculate the natural vibrations and to perform a modal response spectrum analysis according to the Spanish standard NCSE-02.
Structural Design
Blazquez Guanter SLP
Estudi M103 SLP
EGOIN
egoin.com
Residential Building 3D Model in RFEM (© Egoin)
CLT Residential Building
Number of Nodes | 2237 |
Number of Lines | 3428 |
Number of Members | 383 |
Number of Surfaces | 594 |
Number of Load Cases | 8 |
Number of Result Combinations | 182 |
Total Weight | 495.116 tons |
Dimensions (Metric) | 39.408 x 15.390 x 21.725 m |
Dimensions (Imperial) | 129.29 x 50.49 x 71.28 feet |
Program Version | 5.23.01 |
![Timber Panel Wall Stiffnesses](/en/webimage/049956/3893282/49956.png?mw=512&hash=8dfc2b6d0af6ade74073e21655c6a73a34a77751)
![KB 001848 | Timber Column Design as per the 2018 NDS Standard in RFEM 6](/en/webimage/040983/3525158/Timber_Column_for_KB_1848.png?mw=512&hash=8767c3300658d77c253bb7ff632327937a04dd95)
![KB 001875 | AISC 341-22 Moment Frame Member Design in RFEM 6](/en/webimage/047794/3736755/im01.jpg?mw=512&hash=33697d419a0e8a96b738e8e2e97fae057743a108)
![Building Overview (KB1866)](/en/webimage/046746/3676167/KB1866_image01_en_Model.png?mw=512&hash=18feed6e03b6c09c60d7e29dc96041d95c24997b)
![Feature 002825 | Shear Walls and Deep Beams Consisting of Members](/en/webimage/050709/3925056/50709.png?mw=512&hash=8e57b70946dcc367584aee1ee2d82b3efafa652f)
When generating shear walls and deep beams, you can assign not only surfaces and cells, but also members.
![Feature 002824 | OSB Material for USA and Canada](/en/webimage/050460/3955503/2024-06-28_10-42-39.png?mw=512&hash=5ec86ff7955d8c9a50e53301df3f21fceda009a5)
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 | Timber Panel Element](/en/webimage/048109/3767848/2024-03-14_13-56-20.png?mw=512&hash=c2c60498cb42f6ae62fb1ccfea4928bacda0d865)
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)
![Feature 002632 | Floor Analysis as Detached 2D Structures](/en/webimage/041070/3545124/2023-06-22_15-36-36.png?mw=512&hash=1e094ee30f4d2d0a9c93f2cd5f456c9ba5c2afe0)
The building model is calculated in two phases:
- Global 3D calculation of the global model, where the slabs are modeled as a rigid plane (diaphragm) or as a bending plate
- Local 2D calculation of the individual floors
After the calculation, the results of the columns and walls from the 3D calculation and the results of the slabs from the 2D calculation are combined in a single model. This means that there is no need to switch between the 3D model and the individual 2D models of the slabs. The user only works with one model, saves valuable time, and avoids possible errors in the manual data exchange between the 3D model and the individual 2D ceiling models.
The vertical surfaces in the model can be divided into shear walls and opening lintels. The program automatically generates internal result members from these wall objects, so they can be designed as members according to any standard in the Concrete Design add-on.