CN216948757U - A kind of cross double helix high strength stirrup honeycomb steel concrete column - Google Patents

Abstract

A crossed double-helix high-strength stirrup honeycomb-shaped steel concrete column comprises honeycomb-shaped steel, longitudinal bars, crossed high-strength spiral stirrups and cast-in-place concrete. The honeycomb shaped steel is a honeycomb H-shaped steel formed by welding the first steel flange, the second steel flange and the steel web, and the steel web is arranged between the first steel flange and the second steel flange, The steel web is a honeycomb-shaped steel plate cut from a solid web-shaped steel plate along a broken line and welded by butt welds. The outside of the honeycomb steel is provided with a number of longitudinal bars parallel to the length of the honeycomb steel, and a high-strength spiral wound along the outside of the longitudinal bars. Stirrup 1. High-strength spiral stirrup 2 wound along the inner side of several longitudinal bars. The utility model also provides a construction method of the column. The utility model has high bearing capacity, excellent fire resistance and seismic performance, convenient construction, less steel consumption than solid-web steel concrete columns, and better overall performance of honeycomb steel and concrete.

Description

A kind of cross double helix high strength stirrup honeycomb steel concrete column

technical field

The invention belongs to the technical field of construction, and in particular relates to a cross-double helix high-strength stirrup honeycomb-shaped steel concrete column.

Background technique

In recent years, steel-concrete structures have been widely used in super high-rise and long-span heavy-duty structures at home and abroad due to their high strength, high stiffness, good ductility and energy dissipation capacity. However, with the development of super high-rise buildings, large-span structures, and heavy-duty workshops, the load on the upper part of the structure increases, resulting in an increase in the size of the internal section steel, thereby increasing the steel consumption and improving the overall cost of the project.

In the traditional structure, most of the split stirrups are used as the transverse stress reinforcement. However, two 135° anchoring hooks need to be set at the end of each layer of split stirrups, which increases the steel consumption. In the long column of traditional separate stirrups, the stirrups at the column ends are straightened and loosened under the action of earthquake, and the bearing capacity of the structural column is lost, which leads to the collapse of the entire structure. Therefore, the seismic performance of traditional separate stirrups is poor.

With the development of concrete materials and concrete engineering technology, high-strength concrete and ultra-high-performance concrete are widely used. The bursting behavior ultimately weakens the mechanical properties of the structure.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cross-double helix high-strength stirrup honeycomb-shaped steel concrete column to avoid high temperature bursting and improve the fire resistance and high temperature resistance of the column.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A crossed double helix high-strength stirrup honeycomb steel concrete column comprises honeycomb steel, longitudinal bars, crossed high-strength spiral stirrups and cast-in-place concrete; External; the crossed high-strength helical stirrups include a high-strength helical stirrup 1 wound along the outer side of the longitudinal reinforcement and a high-strength helical stirrup 2 wound along the inner side of the longitudinal reinforcement. High-strength spiral stirrups.

In one embodiment, the honeycomb shaped steel is a honeycomb H-shaped steel formed by welding the first steel flange, the second steel flange and the steel web; the steel web is a honeycomb steel plate, which is arranged on the steel web. Between flange one and flange two.

In one embodiment, the first high-strength spiral stirrup is a square continuous spiral stirrup, the second high-strength spiral stirrup is a square or circular continuous spiral stirrup, and the first high-strength spiral stirrup is fixed to the outer side of the longitudinal bar to form an outer Reinforcement mesh, high-strength spiral stirrup II is fixed on the inner side of the longitudinal reinforcement to form an internal reinforcement mesh.

In one embodiment, the high-strength helical stirrup 1 or the high-strength helical stirrup 2 is bound or welded to the longitudinal bar.

In one embodiment, the diameter of the stirrups used in the first high-strength spiral stirrup and the second high-strength spiral stirrup is 4 mm to 8 mm, the yield strength is greater than 600 MPa, and the spacing between the stirrups is set to 20 mm to 120 mm.

In one embodiment, the spiral rising direction of the first high-strength spiral stirrup is opposite to the spiral rising direction of the second high-strength spiral stirrup.

In one embodiment, the cast-in-place concrete is high-strength concrete, ultra-high-performance concrete, recycled concrete, lightweight concrete or thermal insulation concrete.

Compared with the prior art, the beneficial effects of the present invention are:

(1) Excellent structural performance.

A cross-double-helix high-strength stirrup honeycomb-shaped steel concrete column can effectively improve the bearing capacity, ductility and the bond between steel and concrete through the restraining effect of the cross continuous high-strength stirrup net on the lateral deformation of the concrete column and the built-in honeycomb steel. Secondly, the use of spiral stirrups avoids the possibility of loose stirrups during earthquakes, which significantly improves the seismic performance of the column; in addition, the constraining effect of the cross continuous high-strength stirrup net on the core concrete can prevent high temperature bursting and significantly improve the column. fire resistance and high temperature resistance.

(2) The construction is convenient and quick.

The construction process of a crossed double helix high-strength stirrup honeycomb steel concrete column is divided into two stages. The first stage is to complete the steel skeleton production in the factory, and the second stage is to complete the work of supporting the formwork and pouring the concrete at the construction site. Compared with the traditional steel-concrete structure construction process, it reduces a lot of work for tying steel cages at the construction site, and the transportation is simple and has little impact on the surrounding living environment, which is conducive to environmental protection and reduces construction disturbance.

(3) Significant economic benefits.

Compared with solid-web section steel, honeycomb section steel saves about 25% of steel consumption and 15% of cost; compared with traditional separate stirrups, spiral stirrups save two 135° anchoring hooks per layer, saving steel consumption 8 % to 12%, so it has obvious economic benefits compared with traditional steel concrete columns.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a cross-double helix high-strength stirrup honeycomb-shaped steel concrete column of the present invention.

Fig. 2 is a cross-sectional schematic diagram of a cross-double helix high-strength stirrup honeycomb-shaped steel-concrete column of the present utility model along the length direction.

Fig. 3 is a three-dimensional schematic diagram of the honeycomb shaped steel of the present invention.

Fig. 4 is a perspective view of the steel skeleton of the present invention.

FIG. 5 is a perspective view of the second embodiment of the present invention.

6 is a schematic cross-sectional view along the length direction of the second embodiment of the present invention.

FIG. 7 is a three-dimensional schematic diagram of a steel skeleton according to the second embodiment of the present invention.

Explanation of reference signs:

Honeycomb steel 100; steel flange 1 101; steel flange 2 102; steel web 103; longitudinal reinforcement 200; outer high-strength spiral stirrup 1 301; inner high-strength spiral stirrup 2 302; .

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in FIG. 1 and FIG. 2 , the present invention is a cross-double-helix high-strength stirrup honeycomb-shaped steel concrete column, including honeycomb-shaped steel 100 , longitudinal bars 200 , crossed high-strength spiral stirrups and cast-in-place concrete 400 . Among them, the longitudinal direction of the longitudinal bars 200 is parallel to the length direction of the honeycomb shaped steel 100, and is arranged outside the honeycomb shaped steel 100 and has a certain distance from the honeycomb shaped steel 100; The second stirrup 302, the high-strength spiral stirrup 1 301 are wound along the outer side of the longitudinal bar 200, the high-strength spiral stirrup 2 302 is wound along the inner side of the longitudinal bar 200, and the cast-in-place concrete 400 is poured on the honeycomb steel 100, the longitudinal bar 200 and the cross high-strength Spiral stirrups.

Obviously, in the present invention, the honeycomb shaped steel 100, the longitudinal bars 200 and the crossed high-strength spiral stirrups are the prefabricated parts in the workshop, and the cast-in-place concrete 400 is the cast-in-place part at the construction site. The cast-in-place concrete 400 may be high-strength concrete, ultra-high-performance concrete, recycled concrete, lightweight concrete or thermal insulation concrete.

In one embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the honeycomb shaped steel 100 of the present invention is a honeycomb shape formed by welding the first steel flange 101 , the second steel flange 102 and the steel web 103 . H-shaped steel; wherein the steel web 103 is a honeycomb-shaped steel plate, which can be cut from a solid web-shaped steel plate along a broken line and formed by butt welding. between. For example, the honeycomb shaped steel 100 may be formed by cutting the H-shaped steel web, and then welding after staggering the positions, or it may be formed by welding the cut high-strength steel plate. The steel web 103 can be cut according to the designed expansion ratio and spliced to form a honeycomb web.

In one embodiment, as shown in FIGS. 1 , 2 , 4 and 5 , the first high-strength spiral stirrup 301 of the present invention is a square continuous spiral stirrup, and the high-strength spiral stirrup 2 302 is a square or circular continuous spiral For the stirrups, the high-strength spiral stirrup 1 301 is fixed to the outer side of the longitudinal bar 200 to form an external reinforcement mesh, and the high-strength spiral stirrup 2 302 is fixed to the inner side of the longitudinal reinforcement 200 to form an inner reinforcement mesh. The high-strength spiral stirrup 1 301 or the high-strength spiral stirrup 2 302 is fixed to the longitudinal bar 200 by binding or welding. For example, the diameter of the stirrups used in the high-strength spiral stirrup 1 301 and the high-strength spiral stirrup 2 302 is 4 mm to 8 mm, the yield strength is greater than 600 MPa, and the spacing between the stirrups is set to 20 mm to 120 mm.

In one embodiment, the spiral rising direction of the high-strength spiral stirrup 1 301 is opposite to the spiral rising direction of the high-strength spiral stirrup 2 302 .

The concrete construction method of the present invention is:

In step 1, the high-strength steel plate is cut into the required steel flange 1 101, steel flange 2 102 and steel web 103 according to the design requirements in the factory;

In step 2, the first steel flange 101, the second steel flange 102 and the steel web 103 are welded to form a honeycomb according to the requirement that the steel web 103 is arranged between the first steel flange 101 and the second steel flange 102. Section steel 100;

Step 3, make high-strength spiral stirrups 1 301 and high-strength spiral stirrups 2 302 according to the designed diameter and spacing of the stirrups by the automatic spiral stirrup forming equipment;

Step 4, bind the high-strength spiral stirrup 2 302 on the inner side of the longitudinal bar 200, and then bind the high-strength spiral stirrup 1 301 on the outside of the longitudinal bar 200. 302 The three together form a reinforced skeleton;

Step 5, transport the honeycomb shaped steel 100 and the steel skeleton to the construction site and fix it in the designated position;

Step six, support the formwork, and pour the designated cast-in-place concrete 400 on site.

The utility model effectively improves the bearing capacity and ductility of the column by adopting the cross-continuous high-strength spiral mesh technology, avoids the possibility of the stirrup tripping during the earthquake, significantly improves the seismic resistance and hysteresis performance of the column, and effectively suppresses the bursting behavior of high-strength concrete under high temperature. It is a new type of high-performance steel-concrete column technology, which significantly improves the fire resistance and high-temperature resistance of the column. The crossed double helix high-strength stirrup honeycomb shaped steel concrete column proposed by the utility model can complete the processing of shaped steel and steel skeleton in the workshop, and only needs to pour concrete to complete the construction on site, and has the advantages of convenient construction, wide applicability, convenient transportation, etc. It can be widely used in various engineering structures such as buildings and workshops. It has a wide application prospect and has important engineering practical significance and social and economic benefits.

Claims (7)

1. a honeycomb-shaped steel concrete column with crossed double helix high-strength stirrups, characterized in that, comprising honeycomb-shaped steel (100), longitudinal bars (200), crossed high-strength spiral stirrups and cast-in-place concrete (400); The length direction of 200) is parallel to the length direction of the honeycomb section steel (100), and is arranged on the outside of the honeycomb section steel (100); ) and two high-strength spiral stirrups (302) wound along the inner side of the longitudinal bars (200), the cast-in-place concrete (400) is poured on the honeycomb shaped steel (100), the longitudinal bars (200) and the intersecting high-strength spiral stirrups. 2. The crossed double helix high-strength stirrup honeycomb-shaped steel-concrete column according to claim 1, wherein the honeycomb-shaped steel (100) is made of steel flange one (101), steel flange two (102) and A honeycomb H-shaped steel formed by welding a steel web (103); the steel web (103) is a honeycomb steel plate and is arranged between the first steel flange (101) and the second steel flange (102). . 3. The cross-double helix high-strength stirrup honeycomb-shaped steel-concrete column according to claim 1, wherein the high-strength helical stirrup one (301) is a square continuous helical stirrup, and the high-strength helical stirrup two (302) It is a square or circular continuous spiral stirrup, the high-strength spiral stirrup 1 (301) is fixed on the outer side of the longitudinal bar (200) to form an external reinforcement mesh, and the high-strength spiral stirrup 2 (302) is fixed on the inner side of the longitudinal bar (200) to form Internal steel mesh. 4. The crossed double helix high-strength stirrup honeycomb-shaped steel-concrete column according to claim 3, wherein the high-strength helical stirrup one (301) or the high-strength helical stirrup two (302) are bound or welded to the longitudinal reinforcement (200). 5. The cross-double helix high-strength stirrup honeycomb-shaped steel-concrete column according to claim 1, characterized in that, the diameter of the stirrups adopted by the high-strength helical stirrups one (301) and the high-strength helical stirrups two (302) is 4mm ～8mm, and the yield strength is greater than 600MPa, and the stirrup spacing is set to 20mm～120mm. 6. The honeycomb-shaped steel concrete column with crossed double helix high-strength stirrups according to claim 1 or 2 or 3 or 4 or 5, characterized in that the spiral rising direction of the high-strength helical stirrup one (301) is the same as the high-strength helical stirrup. Two (302) spiral upward in the opposite direction. 7. The cross-double helix high-strength stirrup honeycomb-shaped steel-concrete column according to claim 1, wherein the cast-in-place concrete (400) is high-strength concrete, ultra-high-performance concrete, recycled concrete, lightweight concrete or thermal insulation concrete.

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