Experimental and numerical study on shear behaviour of wood-based I-joists with web openings reinforced with FRP L-profiles and diagonal cross-braces
Artykuł w czasopiśmie
MNiSW
200
Lista 2024
| Status: | |
| Autorzy: | Wdowiak-Postulak Agnieszka, Kawecki Bartosz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 280 |
| Numer artykułu: | 121919 |
| Strony: | 1 - 17 |
| Impact Factor: | 5,6 |
| Web of Science® Times Cited: | 0 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The structural performance of wood-based I-joists with web openings, reinforced by adhesively bonded FRP elements was investigated. The members examined comprised laminated veneer lumber (LVL) flanges and a web made of high-density fibreboard, featuring installation openings within the high-shear zone. The study involved testing twelve full-scale beams subjected to four-point bending, encompassing both reference and strengthened specimens. The reinforcement system consisted of L-shaped FRP profiles bonded at the web-flange junction, along with diagonally placed FRP flat bars creating cross-bracing around the openings. Application of Sikadur 30 epoxy adhesive involved evaluating the substrate’s characteristics by carefully preparing it through cleaning, stripping layers, and enhancing surface texture. The evaluation included also the adhesive’s qualities in terms of application temperature and humidity, and its setting duration. Web shear resistance was considerably diminished by the openings, leading to brittle failure in beams lacking reinforcement. The applied reinforcement brought back the web’s structural integrity, leading to a slower failure process and enhanced deformation capability. The enhanced beams demonstrated average 18.5% and 12.1% improvement in their elastic stiffness and maximum load-bearing ability, respectively, when contrasted with the control samples. A Finite Element model, which accounts for the orthotropic plasticity of LVL and a damage model for the fibreboard web, was constructed and verified. Its accuracy was confirmed by comparing its predictions with experimental force–deflection data and observed damage patterns, demonstrating a close match. The suggested method of strengthening timber structures with bonded GFRP can offer a viable substitute for traditional steel reinforcement in lightweight designs. |
