Experimental studies of prestressed solid timber beams
Abstract
The article presents the results of comprehensive experimental and theoretical studies on the behavior of timber beams with combined reinforcement, in which both steel and composite reinforcement are simultaneously used. This approach combines the high strength and stiffness of steel with the low weight of composite materials, ensuring rational material use and improved structural efficiency. Particular attention is given to the development and practical implementation of a method for creating prestressing in composite strip reinforcement located in the tensile zone of the beam. The proposed technique is technologically simple, does not require complex or expensive specialized equipment, and can be implemented both in laboratory conditions and in small- or medium-scale production facilities. The sequence of operations for prestressing the composite reinforcement, anchoring it within the timber base, and fabricating test specimens is described in detail. The study provides a detailed experimental methodology, including the loading scheme, types of measuring devices, and methods for recording displacements and deformations. The deformation patterns and failure modes of prestressed timber beams with combined reinforcement are identified. Experimental relationships of the “moment–curvature” and “moment–deflection” types are constructed, allowing for quantitative evaluation of the influence of prestressing on the stiffness and strength of the elements. The research results confirm that introducing prestressing into the composite reinforcement significantly increases the load-bearing capacity and stiffness of timber elements, reduces deflections, and ensures a more uniform stress distribution across the section. The obtained results have important practical significance and can be applied in the design of new or the reconstruction of existing timber structures, particularly in buildings and facilities with large spans, as well as in the development of new design standards, guidelines, and methodological materials for the calculation, manufacturing, and strengthening of timber structures with combined reinforcement.
Reference
Denys Mykhailovskyi; Petro Gomon. (2025). Experimental studies of prestressed solid timber beams. Building constructions. Theory and Practice. https://doi.org/10.32347/2522-4182.17.2025.30-40
Explore the literature
Follow references, discover citing works and find related studies.