In the GSE Timber software, the wood shearwalls are automatically generated according to the various inputs defined by users in the Wood shearwalls menu. In that menu, the chord members sections are defined.
In previous versions of the GSE, only regular wood sections were available. Now, a new type of section may be created and selected. The new cross-section is composed of two main components, the wood members and a steel rod. The wood members may be built-up sections made of regular sawn lumber.
Shearwalls are specifically used to resist lateral loads. Under a lateral loading case, the chord members will resist the tension and compression forces generated by the overturning bending moment. The wood members act as compression only members and the steel rods act as a tension only members. As the tension chord and compression chord are not symmetric, the transformed moment of inertia of the shearwall has to be calculated (Newfield, 2013)1. The steel rod area is calculated as an equivalent wood section.
Itr = At,tr * ytr2 + Ac * (Lc - ytr )2
The calculated transformed inertia directly affects the shearwall stiffness and thus, the calculated deflections. The modified wall properties are automatically calculated in the software.
1. Newfield, G., Ni, C., Wang, Wang, J. 2013. A mechanics-based approach for determining deflections of stacked multi-storey wood-based shearwalls. FPInnovations, Vancouver, B.C and Canadian Wood Council, Ottawa, Ont.
To enhance productivity of GSE Timber software’ users, the Anchorage Elongation Method can be defined as variable (tension only) and variable (tension and compression). The anchorage slip is calculated at each iteration according to the tension efforts at the anchorage locations.
The live load reduction is available for the GSE steel, concrete, aluminum, and wood modules. The live load reduction will be applied to the columns of the structure.
Live loads can be automatically reduced according to the selected method. The software computes the live load reduction factor (LLRF) that will reduce the effective axial compression force in columns.