Research Article
Experimental Investigation of Flexural Strength of Timber-plate Beam
Ibrahim Abdulrazaq Olayinka*
,
Joseph Edukpe Omaimoje,
John Wasiu,
Haruna Daud Gussau
Issue:
Volume 7, Issue 4, December 2026
Pages:
79-86
Received:
8 July 2026
Accepted:
22 July 2026
Published:
11 November 2026
DOI:
10.11648/j.sf.20260704.11
Downloads:
Views:
Abstract: This research investigated the flexural behavior of timber-plate composite beams with the aim of improving structural performance through enhanced composite action between timber and steel plate components. The study examined the load-deflection response, stiffness development, and ultimate flexural capacity of the beam specimens under controlled laboratory conditions. Timber and steel plates were characterized through physical and mechanical tests to determine their suitability for composite action, with the timber exhibiting an average moisture content of 12% and density of 620 kg/m3. Three composite beam specimens were fabricated and tested under a four-point bending configuration, with measurements taken for deflection, applied load, and failure modes. The results showed a progressive increase in load-bearing capacity with an average ultimate flexural load of 18.50 kN. Corresponding mid-span deflections ranged from 11.25 mm to 14.80 mm at failure, demonstrating significant stiffness contribution from the steel plate. Failure modes were predominantly governed by tensile rupture of the timber tension zone and localized crushing at the compression zone. Statistical evaluation established a strong relationship between applied load and mid-span deflection with a high coefficient of determination (R2 = 0.987) and correlation coefficient (r = 0.993), indicating highly predictable flexural behavior. Prediction accuracy was confirmed with minimal standard error of estimate, and percentage deviations remained within acceptable structural limits. The flexural stiffness of the composite beams showed improvement consistent with findings in published literature on partial-composite systems. This study provides useful data for predicting flexural response of timber-plate beams, offering a practical tool for design optimization and performance assessment in timber-steel composite structural applications.
Abstract: This research investigated the flexural behavior of timber-plate composite beams with the aim of improving structural performance through enhanced composite action between timber and steel plate components. The study examined the load-deflection response, stiffness development, and ultimate flexural capacity of the beam specimens under controlled l...
Show More
