Rebar is the main product of steel rolling production line, let us understand the characteristics of rebar.
Rebar is a versatile building material, usually in the shape of a thread, they can be customized in size and can be easily placed in concrete to form a monolithic structure.
Concrete is a material with high compressive strength but little tensile strength. To compensate for this imbalance in the concrete slab behavior, steel bars are poured into it to withstand tensile loads. The surface of the rebar can be patterned to form a better bond with the concrete.
Reinforced concrete is a composite material consisting of concrete and some form of reinforcement (either steel wire or steel and wire mesh).
The thermal expansion properties of steel and concrete are about the same. This, together with excellent flexural properties, makes steel the best material for reinforcement in concrete structures. Rebar acts as a tensioning device to strengthen the concrete to help keep it in compression.
Common Definitions of Rebar Connections
rebar
It is a steel product with a circular or almost circular cross-section, suitable for the reinforcement of concrete.
Ribbed steel bar
It is a steel bar with at least two rows of transverse ribs, which are evenly distributed over the entire length.
Nominal cross-sectional area
The cross-sectional area is equal to the area of a circular polished rod with the same nominal diameter d.
longitudinal ribs
It is a uniform and continuous protrusion parallel to the axis of the rebar.
transverse rib
It is a rib on the surface of the rebar, not a longitudinal rib.
Lateral rib side inclination
It is the angle of the side of the rib measured perpendicular to the longitudinal axis of the rib.
transverse rib inclination
The angle between the axis of the transverse rib and the longitudinal axis of the bar.
Rib height
The distance from the highest point (transverse or longitudinal) of the reinforcement bar to the core surface, measured perpendicular to the bar axis.
Rib spacing
It is the distance between the centres of two consecutive transverse ribs measured parallel to the axis of the rebar.
Relative rib area
It is the projected area of all ribs on a plane perpendicular to the longitudinal axis of the bar divided by the rib spacing and the nominal perimeter.
Standard properties
Attributes identified as part of routine inspection and testing requirements.
special properties
Properties not identified as part of routine inspection and testing requirements. (e.g. fatigue properties)
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