2 research outputs found
Hardwood - Softwood Combination in Glued Laminated Timber Cross-Section
Glued laminated timber (glulam), as one of
the types of engineered wood products, is in our conditions
most often made of coniferous, specifically spruce wood.
In order to find optimal usage of material, some new
configurations of cross-sections are being suggested.
An advanced solution of glulam cross-section could be
represented by cross-section formed from combination
of hardwood (from deciduous trees) and softwood (from
conifers). This paper deals with a possibility of
combination of outer lamellas from a hardwood and inner
lamellas from a softwood in glulam cross-section.
The solution is focused on members suitable for a use in
a skeleton frame. Attention is paid to two types
of structural members: beam and column. Results of
theoretical study are presented which arise from
an analytical calculation and from a numerical modelling.
For comparison, the calculations were carried out for
a reference cross-section consisting of softwood lamellas
only. By comparing the combined and reference crosssections,
it can be stated that the use of the combined
cross-section can save material for both the compression
member (column) and the member subjected to bending
moment (beam, girder). The combined cross-section
appears to be more advantageous than the reference crosssection,
especially in cases of smaller beam depth