Full-spiral stirrup rectangular stand column

Abstract

The full-spiral stirrup rectangular stand column is formed by jointly pouring a concrete rectangular frame column, a steel reinforcement framework and concrete, the steel reinforcement framework comprises longitudinal bars, large spiral stirrups, small circular spiral stirrups and tie bars, the large spiral stirrups are arranged on the inner side face of the concrete rectangular frame column in an attached mode, and the small circular spiral stirrups are arranged on the inner side face of the concrete rectangular frame column in an attached mode. The longitudinal bars are evenly arranged along the periphery of the rectangular section of the concrete rectangular frame column and connected with the inner edge peripheries of the large spiral stirrups and the inner edge peripheries of the small circular spiral stirrups respectively, and the tie bars are located between the small circular spiral stirrups and connected between the two opposite longitudinal bars. The structure breaks through the limitation that a traditional spiral stirrup is only suitable for a circular stand column, overcomes the defect that the spiral stirrup is applied to a rectangular stand column, and enables concrete at four corner points of the stand column to fully exert the restraining effect. The constraint effect of the spiral stirrups on concrete is fully exerted, the bearing capacity and ductility of the stand column are improved, mechanical automatic rolling forming can be fully utilized, the labor intensity and dependence on manpower are reduced, the accuracy of steel bar engineering and the quality and safety of the structure are improved, the industrialization degree is high, and good economic benefits are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering structures, and in particular relates to a full-spiral stirrup rectangular column. Background Art

[0002] Data on earthquake damage in high-intensity areas show that the ends of columns usually appear in the form of buckling of longitudinal reinforcement and crushing of concrete, and this is more obvious in rectangular (including square) columns than in circular columns. Severe damage to the ends of columns can cause the columns to lose their bearing capacity and other structures to tilt or even collapse, which can be life-threatening and bring great difficulties to post-disaster building repair. Surveys show that good ductility can effectively alleviate or prevent serious damage to columns. Therefore, it is crucial to improve the ductility and deformation capacity of reinforced concrete columns. Studies have shown that spiral stirrups can not only support longitudinal reinforcement and avoid premature buckling, but also effectively constrain the concrete in the core area, improve the bearing capacity and ductility of concrete, enhance the energy dissipation capacity and anti-collapse capacity of the overall structure, and provide possibilities for later maintenance. For square columns with rectangular cross-sections, traditional rectangular stirrups are prone to bulging under earthquakes, resulting in a large amount of peeling of the concrete protective layer, which in turn accelerates the buckling of the longitudinal reinforcement. At the same time, the bending, binding and assembly of the traditional rectangular stirrups and steel cages require a large number of workers and time, which is not conducive to industrial production. Spiral stirrups avoid the on-site bending and tying of traditional rectangular stirrups, simplify the construction process, and improve the bearing capacity and ductility of the structure, becoming the preferred choice to replace traditional rectangular stirrups. At present, spiral stirrup technology is mainly used in round piles and columns, and is rarely used in reinforced concrete rectangular cross-section columns. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a full spiral stirrup rectangular column to solve the deficiencies in the prior art.

[0004] In order to achieve the above object, the present invention is achieved through the following technical solutions:

[0005] A fully spirally reinforced rectangular column is provided, wherein the column is cast together by a concrete rectangular frame column, a steel skeleton and concrete, the steel skeleton comprises longitudinal bars, large spiral stirrups, small round spiral stirrups and tension bars, the large spiral stirrups are arranged in close contact with the inner side surface of the concrete rectangular frame column, the longitudinal bars are evenly arranged along the periphery of the rectangular cross section of the concrete rectangular frame column, the longitudinal bars are respectively connected to the inner edge circumference of the large spiral stirrups and the inner edge circumference of the small round spiral stirrups, and the tension bars are located between the small round spiral stirrups and connected between two longitudinal bars arranged opposite to each other.

[0006] As described in the fully spirally reinforced rectangular column, wherein the large spiral stirrups are arranged along the length direction of the longitudinal reinforcement, and the large spiral stirrups are connected to the longitudinal reinforcement by spot welding.

[0007] As described in the fully spirally reinforced rectangular column, wherein the small round spiral stirrups are respectively located at the four corners of the concrete rectangular frame column, the small round spiral stirrups are arranged along the length direction of the longitudinal reinforcement, and the small round spiral stirrups are spot-welded to the longitudinal reinforcement.

[0008] As described in the fully spirally reinforced rectangular column, wherein the four small circular spiral stirrups are staggered with the large spiral stirrups by 1 / 4, 1 / 2, 3 / 4, and 1 pitch respectively.

[0009] For example, in the fully spirally reinforced rectangular column, the steel bars of the small round spiral stirrups have the same diameter as the steel bars of the large spiral stirrups, or the diameter of the steel bars of the small round spiral stirrups is slightly smaller than the diameter of the steel bars of the large spiral stirrups.

[0010] As described in the fully spirally reinforced rectangular column, wherein the four corners of the concrete rectangular frame column are all chamfered, and the radius of the chamfered corners is 1 / 8 to 1 / 4 of the length of the side or short side of the rectangular cross section of the concrete rectangular frame column.

[0011] As described in the fully spirally reinforced rectangular column, wherein the number of the tie bars is two to three and two of them are perpendicular to each other and arranged along the length direction of the longitudinal bars, and the longitudinal spacing between the two perpendicular tie bars is equal to the pitch of the large spiral stirrups.

[0012] For example, in the fully spirally reinforced rectangular column, both ends of the tie bar are provided with anchoring sections to prevent it from detaching from the concrete.

[0013] The beneficial effects of the technical solution of the present invention are:

[0014] 1. The large spiral stirrups and the four-corner small round spiral stirrups of the present invention can be machined, so that the production efficiency is accelerated and the quality is guaranteed. The continuity can improve the restraint effect and ensure that the stirrups are not disengaged. There is no need for hook joints, so that the amount of steel used is greatly reduced.

[0015] 2. The present invention uses a steel bar skeleton formed by connecting large spiral stirrups with longitudinal bars to constrain the core concrete of the rectangular column, and at the same time, a steel bar skeleton formed by connecting small round spiral stirrups with longitudinal bars at four corners to constrain the concrete at the four corners of the rectangular column, that is, the large spiral stirrups and the small round spiral stirrups at four corners work together so that all positions of the entire rectangular column are constrained by the spiral stirrups, so that the spiral stirrups can be applied to rectangular cross-sections, thereby ensuring the restraining effect of concrete. At the same time, the spiral stirrups provide lateral loads to the core concrete of the rectangular column, greatly improving the bearing capacity of the rectangular column;

[0016] 3. The present invention solves the problem of insufficient restraint of concrete at the corners of rectangular columns, improves the bearing capacity and ductility of restrained concrete, enhances the energy absorption capacity and anti-collapse capacity of the overall structure, has excellent bearing capacity and seismic resistance, avoids the bending and binding of traditional rectangular stirrups and the assembly of steel cages, reduces the difficulty of on-site construction, can make full use of mechanical automation, improves construction efficiency and production quality, facilitates industrialized production, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To further illustrate the above-mentioned objectives, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Figure 1 A stereogram of a preferred embodiment of the present invention;

[0019] Figure 2 A top view of a preferred embodiment of the present invention;

[0020] Figure 3 and Figure 4 They are all side views of preferred embodiments of the present invention;

[0021] In the figure: 1. Concrete rectangular frame column; 2. Longitudinal reinforcement; 3. Large spiral stirrups; 4. Small circular spiral stirrups 4; 5. Tension reinforcement. DETAILED DESCRIPTION

[0022] The terms "invention", "present invention" and "the present invention" used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims below. Statements containing these terms should not be understood to limit the subject matter described herein or to limit the meaning or scope of any patent claim below. In addition, this specification does not attempt to describe or limit the subject matter covered by any claim of any specific component, paragraph, statement or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings and any claims below. The present invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the words and terms used herein are for illustrative purposes and should not be considered as limiting.

[0023] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0024] The use of "including," "having," and "comprising" and variations thereof herein is meant to encompass the items listed thereafter and their equivalents and additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, rear, etc., in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally accept or limit the present invention in any form. In addition, terms such as "first," "second," "third," etc., are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0025] See also Figures 1 to 4 As shown, in a preferred embodiment, the full spiral stirrup rectangular column of the present invention is cast together by a concrete rectangular frame column 1, a steel skeleton and concrete, the steel skeleton includes longitudinal bars 2, large spiral stirrups 3, small round spiral stirrups 4 and tension bars 5, the large spiral stirrups 3 are arranged on the inner side of the concrete rectangular frame column 1, and the longitudinal bars are evenly arranged along the periphery of the rectangular cross section of the concrete rectangular frame column 1, with a spacing of about 150 mm. The longitudinal bars 2 are respectively connected to the inner edge circumference of the large spiral stirrups 3 and the inner edge circumference of the small round spiral stirrups 4, and the tension bars 5 are located between the small round spiral stirrups 4 and connected between the two longitudinal bars 2 arranged opposite to each other.

[0026] The four corners of the concrete rectangular frame column 1 are all rounded, and the radius of the rounded corners is 1 / 8 to 1 / 4 of the length of the side or short side of the rectangular cross section of the concrete rectangular frame column 1. Preferably, the rectangle is a long rectangle.

[0027] The large spiral stirrups 3 are arranged along the length direction of the longitudinal reinforcement 2, and the large spiral stirrups 3 and the longitudinal reinforcement 2 are connected by spot welding.

[0028] The small round spiral stirrups 4 are respectively located at the four corners of the concrete rectangular frame column 1, and are arranged along the length direction of the longitudinal reinforcement 2. The small round spiral stirrups 4 are spot-welded to the longitudinal reinforcement 2. Specifically, the four small round spiral stirrups 4 are staggered with the large spiral stirrups 3 by 1 / 4, 1 / 2, 3 / 4, and 1 pitch, respectively.

[0029] The steel bars of the small round spiral stirrups 4 have the same diameter as the steel bars of the large spiral stirrups 3 , or the diameter of the steel bars of the small round spiral stirrups 4 is slightly smaller than the diameter of the steel bars of the large spiral stirrups 3 .

[0030] There are two to three tie bars 5, two of which are perpendicular to each other and arranged along the length direction of the longitudinal bars 2, and the longitudinal spacing of the two perpendicular tie bars 5 is equal to the pitch of the large spiral stirrups 3. It can be understood that when the rectangle is a rectangle, there are three tie bars 5, two of which are parallel to each other between the long sides of the rectangle, and when the rectangle is a square, there are two tie bars 5.

[0031] Continue to view Figure 2 As shown, both ends of the tie rod 5 are provided with anchoring sections to prevent it from being separated from the concrete.

[0032] The large spiral stirrups and the four-corner small round spiral stirrups of the present invention can be machined, so that the production efficiency is accelerated and the quality is guaranteed. The continuity can improve the restraint effect and ensure that the stirrups are not disengaged, and no hook joints are required, so that the steel consumption is greatly reduced.

[0033] The present invention uses a steel bar skeleton formed by connecting large spiral stirrups with longitudinal bars to constrain the core concrete of the rectangular column, and at the same time, a steel bar skeleton formed by connecting small round spiral stirrups at four corners with longitudinal bars to constrain the concrete at the four corners of the rectangular column, that is, the large spiral stirrups and the small round spiral stirrups at four corners work together so that all positions of the entire rectangular column are constrained by the spiral stirrups, so that the spiral stirrups can be applied to rectangular cross-sections, thereby ensuring the restraining effect of concrete. At the same time, the spiral stirrups provide lateral loads to the core concrete of the rectangular column, greatly improving the bearing capacity of the rectangular column.

[0034] The present invention solves the problem that the concrete at the corners of rectangular columns is insufficiently restrained, improves the bearing capacity and ductility of restrained concrete, enhances the energy dissipation capacity and anti-collapse capacity of the overall structure, has excellent bearing capacity and seismic resistance, avoids the bending and binding of traditional rectangular stirrups and the assembly of steel cages, reduces the difficulty of on-site construction, can make full use of mechanical automation, improves construction efficiency and production quality, is convenient for industrialized production, and has good economic benefits.

[0035] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully spirally reinforced rectangular column, characterized in that: It is cast together by concrete rectangular frame columns, a steel skeleton and concrete, the steel skeleton includes longitudinal bars, large spiral stirrups, small round spiral stirrups and tension bars, the large spiral stirrups are arranged on the inner side of the concrete rectangular frame column, the longitudinal bars are evenly arranged along the periphery of the rectangular cross section of the concrete rectangular frame column, the longitudinal bars are respectively connected to the inner edge circumference of the large spiral stirrups and the inner edge circumference of the small round spiral stirrups, and the tension bars are located between the small round spiral stirrups and connected between the two longitudinal bars arranged oppositely.

2. The fully spirally reinforced rectangular column according to claim 1, characterized in that: The large spiral stirrups are arranged along the length direction of the longitudinal reinforcement, and the large spiral stirrups are connected to the longitudinal reinforcement by spot welding.

3. The fully spirally reinforced rectangular column according to claim 1, characterized in that: The small round spiral stirrups are respectively located at the four corners of the concrete rectangular frame column, the small round spiral stirrups are arranged along the length direction of the longitudinal reinforcement, and the small round spiral stirrups are spot-welded to the longitudinal reinforcement.

4. The fully spirally reinforced rectangular column according to claim 3, characterized in that: The four small round spiral stirrups are staggered with the large spiral stirrups by 1 / 4, 1 / 2, 3 / 4 and 1 pitch respectively.

5. The fully spirally reinforced rectangular column according to claim 1, 2, 3 or 4, characterized in that: The steel bars of the small round spiral stirrups have the same diameter as the steel bars of the large spiral stirrups, or the diameter of the steel bars of the small round spiral stirrups is slightly smaller than the diameter of the steel bars of the large spiral stirrups.

6. The fully spirally reinforced rectangular column according to claim 1, characterized in that: The four corners of the concrete rectangular frame column are all rounded, and the radius of the rounded corner is 1 / 8 to 1 / 4 of the length of the side or short side of the rectangular cross section of the concrete rectangular frame column.

7. The fully spirally reinforced rectangular column according to claim 1, characterized in that: There are two to three tie bars, two of which are perpendicular to each other and arranged along the length direction of the longitudinal bars. The longitudinal spacing between the two perpendicular tie bars is equal to the pitch of the large spiral stirrups.

8. The fully spirally reinforced rectangular column according to claim 1 or 7, characterized in that: Both ends of the reinforcement are respectively provided with anchoring sections to prevent the reinforcement from being separated from the concrete.

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