Whereas in the classical Bernoulli beam theory it is assumed that the cross-section of a member remains perpendicular to the member axis when deformed, the shear sliding is considered for the Timoshenko beam theory (flexible beam). As a result, the cross-section of a member no longer remains perpendicular to the member axis when deformed (see Figure 01). By assuming that the cross-section remains planar, it results in a uniform shear stress distribution along the beam height. However, since the distribution is parabolic, a shear correction factor is taken into account for the determination of shear areas. This is 5/6 for a rectangular cross-section.
KB 001603 | Shear Deformations of Member Structures in Timber Construction
Using the "Beam Panel" thickness type, you can model timber panel elements in 3D space. You just specify the surface geometry and the timber panel elements are generated using an internal member-surface construct, including the simulation of the connection flexibility.
Use the "Rib" component to define any number of longitudinal ribs on a member plate. By specifying a reference object, you can automatically specify welds on it.
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.
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.