Hardwood - Softwood Combination in Glued Laminated Timber Cross-Section

Hardwood - Softwood Combination in Glued Laminated Timber Cross-Section

Článek recenzovaný mimo WoS a Scopus

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 cross-sections, 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 cross-section, especially in cases of smaller beam depth.

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 cross-sections, 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 cross-section, especially in cases of smaller beam depth.

Coniferous timber; deciduous timber; design resistance; glued laminated timber; hardwood; softwood

Coniferous timber; deciduous timber; design resistance; glued laminated timber; hardwood; softwood

BALÁZS, I.; PEŠEK, O.; BUKOVSKÁ, P.

2021

11.09.2020

VŠB - Technická univerzita Ostrava

Ostrava

1804-4824

Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series

20

1

Česká republika

5

12

8

http://tces.vsb.cz/Home/ArticleDetail/494