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

FIELD: construction.

SUBSTANCE: reinforcement bar of periodic profile consists of core with circular cross-section, and with inclined transverse ribs of constant height on surface. Pitch of transverse ribs t is determined on condition of providing anchoring disturbance by achieved limit of physical and mechanical properties of concrete under working areas

where t is pitch of transverse ribs; b is upper part width of rib, h is height of rib; R_b is prism concrete strength; R_cm is ultimate compression strength of concrete; R is cube concrete strength; R_avg is ultimate shearing strength of concrete.

EFFECT: pitch of transverse ribs is determined on condition of providing anchoring disturbance due to destruction of concrete support cylinders under working areas of transverse ribs, when prism strength R_b, or ultimate compression strength of concrete R_cm, or cube concrete strength R is achieved, depending on type of reinforced concrete structures.

1 cl, 3 dwg