THREE-LAYER RESOURCE-SAVING REINFORCED CONCRETE PANEL Russian patent published in 2018 - IPC E04C2/06 E04B1/62 

FIELD: construction.

SUBSTANCE: three-layer resource-saving reinforced concrete panel includes a thermal insulation layer, outer and inner reinforced concrete layers connected to each other by rigid links made in the form of reinforced concrete dowels passing through the heat-insulating layer and reinforced concrete ribs arranged on the panel perimeter. It is additionally equipped with at least two reinforced concrete dowels arranged on opposite panel sides, and the reinforced concrete ribs in the cross section parallel to the panel layers have an area determined by the ratio of the panel area, the thickness of its middle layer, the thermal conductivity coefficients of the rib materials, the layers of the panel, the reinforcement and the heat insulation material, as well as the required heat transfer resistance. The thermal conductivity coefficient of the material of the reinforced concrete dowels passing through the heat-insulating layer is 2.5-3 times higher than the thermal conductivity coefficient of the material of the reinforced concrete dowels arranged on the opposite panel ends. The heat-insulating layer is made of a fine-fibrous material and is arranged in the form of twisted bundles longitudinally extended along the panel length. Wherein curvilinear grooves arranged in pairs, in the form of sine waves longitudinally stretched from one end to the opposite one, are made on the outer side of the reinforced concrete dowels passing through the heat-insulating layer, in the number of at least two. The areas of greatest convergence of the curvilinear grooves arranged in pairs form nodes causing the formation of transverse standing waves.

EFFECT: maintaining normalized parameters of reliable operation of an energy-saving three-layer reinforced concrete panel under changing climatic and vibration impacts, due to reducing the concentration moving of longitudinal thermal stresses and seismic waves by means of making curvilinear grooves, at least two, in the form of longitudinally elongated sine waves on the outer surface of the reinforced concrete dowels passing through the insulating layer, forming nodes in the areas of greatest convergence between each other, which contribute to the formation of transverse standing waves leading to partial displacement of the vibration effect, as well as to the partial movement of thermal stresses in the panels.

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