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Fabrication and Design of Wood-Based High-Performance Composites
Published on: November 9, 2019
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Application of Composite Bars in Wooden, Full-Scale, Innovative Engineering Products-Experimental and Numerical Study
Agnieszka Wdowiak-Postulak1, Grzegorz Świt1, Ilona Dziedzic-Jagocka2
1Department of Strength of Materials and Building Structures, Faculty of Civil Engineering and Architecture, Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland.
Materials (Basel, Switzerland)
|April 9, 2024
Summary
Reinforcing timber beams with prestressed fiber bars significantly enhances load capacity and stiffness. This study demonstrates improved performance for basalt, glass, and hybrid fiber reinforcements in various conditions, including weathering and fire.
Area of Science:
- Structural Engineering
- Materials Science
- Timber Construction
Background:
- Modular timber products offer cost-effective, lightweight solutions in construction.
- Timber structures require repair or reinforcement due to deterioration or increased load demands.
- Novel reinforcement methods are crucial for enhancing stiffness and load-bearing capacity of timber elements.
Purpose of the Study:
- To experimentally and numerically investigate the static performance of flexural timber beams reinforced with prestressed fiber bars.
- To evaluate the effectiveness of basalt (BFRP), glass (GFRP), and hybrid glass-basalt fiber bars in enhancing timber beam properties.
- To assess the long-term performance and fire resistance of reinforced timber beams.
Main Methods:
- Experimental testing of timber beams reinforced with prestressed BFRP, GFRP, and hybrid bars.
- Numerical simulations to correlate with experimental findings.
- Long-term studies involving biological degradation, weathering, and fire exposure tests on reinforced timber beams.
Main Results:
- Significant increases in load-carrying capacity (up to 44%) and stiffness (up to 28%) were observed with BFRP, GFRP, and hybrid reinforcements.
- Reinforced timber beams showed improved performance after 7 years of weathering and exposure to environmental conditions (27% load capacity, 28% stiffness increase).
- Numerical simulations showed satisfactory correlation with experimental results (1.1%–5.5% difference), with notable deviations in fire condition analysis.
Conclusions:
- Prestressed fiber-reinforced polymer bars are effective in enhancing the static performance of timber beams.
- Reinforced timber structures demonstrate durability and improved mechanical properties under various environmental stresses, including fire.
- The study provides a foundation for future research into advanced timber reinforcement techniques.
Keywords:
BFRPFEMGFRPbarsbiological degradationenvironmental conditionsfireflexural behaviorhybrid barsincreased temperatureprestressingreinforcementtimber structuresMore Related Videos
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