GENERAL PURPOSE REINFORCEMENT BAR OF PERIODIC PROFILE Russian patent published in 2016 - IPC E04C5/03 

FIELD: construction.

SUBSTANCE: reinforcement bar of periodic profile consists of a core of a round cross-section with inclined transverse ribs of constant height on the surface. Geometrical dimensions of transverse ribs in the form of characteristic of profile are set based on a calculation of strength characteristic of concrete between transverse reinforcement ribs by the formula: $${Б}_{Б}=\frac{R_b}{\mathrm{0,7}\cdot \sqrt{R_b\cdot }{R}_{bt}}+4$$ for the highest concrete class B 60, and which is accepted equal to at least 10 to provide concrete destruction directly under working platforms of transverse ribs when concrete achieves prism strength R_b, where t - pitch of transverse ribs; b - width of the rib upper part; h - rib height; R_b - prism strength of concrete class B 60; R_bt - concrete strength for axial tension of class B 60. Technical result consisting in maximum adhesion strength of reinforcement bars to concrete is achieved due to equality of profile characteristics and concrete strength between transverse ribs "Б"_A="Б_Б". Characteristic of concrete strength between transverse ribs is determined as per the above formula and accepted as equal to at least 10, "Б_Б"≥10.

EFFECT: improvement of reliability.

2 cl, 3 dwg