RU2003110855A - MONOLITHIC TWO-LAYER REINFORCED CONCRETE PLATE - Google Patents

Claims (1)

Monolithic two-layer reinforced concrete slab containing the upper and lower slabs and a separating elastic layer, characterized in that the upper slab is made of three types of sections: contour strips located along the contour of the lower slab and having a width of mutually perpendicular strips b ₁ and l ₁ , respectively, of the inner strips forming a mesh inside the contour and having a width perpendicular bands respectively b ₂ and l ₂ and the core portions located within the grid defined by the contour and inner bands and having posted ry in terms of b ₃ and l _3, the main portions are in contact with the bottom plate through the spacer elastic layer, and the outline and the inner strip are connected to a bottom plate rigidly via vertical anchors, wherein the base portions are connected with internal and contour stripes horizontal anchors, with this b ₁ , b ₂ , l ₁ , l ₂ may not be equal to each other, but for all the condition

and l ₃ and b ₃ may also not be equal to each other, but for all the condition

moreover, the ratio of the width of the contour or inner strip to the width of the main part should be as small as possible, where σ, kg / cm ² - stresses on the main sections of the slab arising during the operation of a monolithic two-layer reinforced concrete slab; h ₂ cm - the thickness of the upper plate; τ, kg / cm ² - shear stresses that the contour or inner strip can withstand at the contact with the bottom plate, taking into account vertical anchors;

, kg / cm ² —maximum stresses in concrete at which no cracks form; p, kg / cm ² - the load per square centimeter of the weight of the top plate and equipment when concreting; f is the coefficient of sliding friction.