Abstract
Aerated concrete is actively used in energy efficient construction, mainly as a masonry material for vertical load-bearing structures. At the same time, the creation of a closed thermal contour of the building, which is the basis of modern energy saving requirements, is rational by the use of aerated concrete in load-bearing horizontal structures that require reinforcement. Traditionally bar reinforcement is ineffective in aerated concrete due to low specific adhesion at the contact of the reinforcement with concrete and significantly less than that of heavy concrete, the distribution capacity of concrete around a rod, which evenly transforms concrete stress to bar extension, the consequence of which is the significant bar understress while pulling it in concrete. The authors’ research in the field of rationalization of reinforcing elements that are effective in cellular concrete, aimed at increasing the contact surface of the reinforcing element with concrete while maintaining the original steel consumption, makes it possible to recommend tape reinforcement for use in reinforced aerated concrete structures. Punched steel tapes equal to the bar reinforcement of the cross-sectional area, but having developed lateral surface, provide an increase in the adhesion strength of the reinforcement and preventing its pulling. The article presents the results of a numerical study of stress-strain state in reinforced aerated concrete beam with rectangular section, reinforced with the proposed tape reinforcement in comparison with traditional bar reinforcement
Highlights
Aerated concrete is actively used in energy efficient construction, mainly as a masonry material for vertical load-bearing structures
The creation of a closed thermal contour of the building, which is the basis of modern energy saving requirements, is rational by the use of aerated concrete in loadbearing horizontal structures that require reinforcement
Bar reinforcement is ineffective in aerated concrete due to low specific adhesion at the contact of the reinforcement with concrete and significantly less than that of heavy concrete, the distribution capacity of concrete around a rod, which evenly transforms concrete stress to bar extension, the consequence of which is the significant bar understress while pulling it in concrete
Summary
Для демонстрации большей эффективности для несущей способности ячеистобетонных изгибаемых конструкций армирования их арматурными элементами, обладающими развитой боковой поверхностью, было выполнено моделирование и сравнительный физически нелинейный расчет параметров напряженно-деформированного состояния армированных ячеистобетонных балок прямоугольного сечения 150×200 мм (b×h) пролетом 1,5 м из ячеистого бетона D500 B1,5, условно армированных традиционной стержневой и инновационной ленточной арматурой (стальными зубчатыми лентами) равной площади сечения [9]. Реализация физически нелинейного расчета и полный анализ фактического напряженно-деформированного состояния армированной ячеистобетонной балки в ходе исследования влияния ленточного армирования на несущую способность изгибаемых конструкций из ячеистого бетона, выполнена с учетом заданных диаграмм деформирования материалов конструкции на основе метода конечных элементов в ПК Лира-САПР 2020.
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More From: Bulletin of Belgorod State Technological University named after. V. G. Shukhov
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