Rebar used in concrete

a technology of rebar and concrete, which is applied in the field of non-circular rebar used in concrete, can solve the problems of inconvenient tie-up of circular rebar, and achieve the effects of convenient tie-up, saving space occupied, and ensuring construction safety

Inactive Publication Date: 2015-05-07
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]In the non-circular rebar used in concrete in accordance with the present invention, the square, rectangular, elliptical, trapezium, and triangular rebar and the rebar with round edges and corners substitute the conventional circular rebar, so that the rebar can be tied easily to save the space occupied. The distance of the resultant force of the tensile stresses of the rebar from the boundary of the concrete becomes closer or the concrete protecting layer becomes thicker, so that the change of the shape increases the bonding between the rebar and concrete to assure the safety of construction.

Problems solved by technology

The conventional rebar used in concrete is generally in a circular shape, and thus having the following drawbacks: (1) Since the contact is point-to-point or line-to-line, it is inconvenient to tie the circular rebar.

Method used

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Embodiment Construction

[0016]The present invention will become clearer in light of the following detailed description of an illustrative embodiment of this invention described in connection with the drawings. It is intended that the embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.

[0017]With reference to FIGS. 1 to 4 for a non-circular rebar used in concrete in accordance with the present invention, the non-circular rebar is a rebar with a non-circular main cross-section, and the non-circular shape includes but not limited to a square, a rectangle, an ellipse, a trapezium, a triangle, and any shape with round edges and corners. Some of these shapes are shown in FIGS. 1 to 4, and the round corners is intended to reduce stress concentration in the rebar and to reduce the flow resistance of aggregates and mortars around the rebar during a casting process.

[0018]The rebar of the present invention not just includes steel only, but also includes a fiber reinforc...

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Abstract

A non-circular rebar used in concrete includes a square rebar, a rectangular rebar, an elliptical rebar, a trapezium rebar, a triangular rebar, and a rebar with round edges and corners. The square, rectangular, elliptical, trapezium, and triangular rebars and the rebar with round edges and corners substitute the conventional circular rebar, so that the rebars can be tied easily to save the space occupied. Since the distance of the resultant force of the tensile stresses of the rebar from the boundary of the concrete becomes smaller or the concrete protecting layer becomes thicker, the change of the shape increases the bonding between the rebar and concrete, and the safety of construction is improved. The non-circular rebar includes a smooth rebar and a ribbed rebar with a non-circular main cross-section.

Description

[0001]The current application claims a foreign priority to the patent application of China No. 201310545272.5 filed on Nov. 7, 2013.FIELD OF THE INVENTION[0002]The present invention relates to the technical field of concretes, in particular to a non-circular rebar used in concrete.BACKGROUND OF THE INVENTION[0003]In general, rebar refers to rebar or fiber reinforced polymer (FRP) used in concrete, and the rebar usually has a circular cross-section. The rebar includes smooth rebar, ribbed rebar, and twisted rebar, and the there are various types of rebar classified according to chemical composition, production skill, rolling shape, supply form, diameter and usage. For example, the rebar used in steel reinforced concrete refers to concrete with steel bar or steel disc, and it is divided into smooth steel and ribbed steel according to its shape. The steel in the concrete is primarily provided for bearing tensile stresses. Since the rebar includes a rib, the ribbed steel has a greater b...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E04C5/01E04C5/07
CPCE04C5/01E04C5/073E04C5/012E04C5/07E04C5/02
Inventor YU, GUO-YOUMIAO, QING
Owner DONGGUAN UNIV OF TECH
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