Multi-Span Composite Timber Beams with Rational Steel Reinforcements

Wooden multi-span beams with steel reinforcement were studied experimentally on a stationary stand using an eight-point loading scheme that simulated load uniformly distributed over the beam span. The studies carried out span of 4.8 m cross-sectional area 40 mm × 80 mm, reinforced in stretched zones cross-section rods made hot-rolled A400 class. rational for location reinforcements tensioned and compressed determined. placements support was based numerical simulation volumetric stress state calculated finite element method. It confirmed failure wood composite had plastic nature occurred only along normal sections. This excluded possibility brittle fracture from shear stresses ensured operational reliability structures as whole. shown proposed wooden increased their bearing capacity by 175% reduced deformability 85%. results obtained indicated high efficiency application developed method roofs floors buildings.