Multi-Span Composite Timber Beams with Rational Steel Reinforcements

Buildings

Maria Karelina¹  Nikolay Vatin²  Evgeny Prusov³  Svetlana Roshchina³  Mikhail Lukin³ 

[1] Moscow Automobile and Road Construction University, 125319 Moscow, Russia;Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;Vladimir State University named after Alexander and Nikolay Stoletovs, 600000 Vladimir, Russia;

关键词: timber–steel hybrid beam;    steel-reinforced;    glued-in rods;    glulam;    girders;    strengthening;   

DOI  :  10.3390/buildings11020046

来源: DOAJ

【 摘 要 】

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

【 授权许可】

Unknown