CN212001734U

CN212001734U - Concrete-filled steel tube shear wall with concrete wrapped on side surface

Info

Publication number: CN212001734U
Application number: CN202020300455.6U
Authority: CN
Inventors: 李贤�
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-11-24
Anticipated expiration: 2030-03-12

Abstract

The utility model discloses a steel pipe concrete shear force wall of concrete is wrapped up in to side, include by the limb end plate, the wall limb steel pipe chamber of being no less than a closed cavity that corner steel pipe and a plurality of wall limb shaped steel welding are constituteed, the overhanging length in both sides of limb end plate for wall limb steel pipe chamber respectively is not less than 20mm, the inside core concrete that fills of wall limb steel pipe chamber, the wall limb steel pipe chamber outside is equipped with to wrap up and covers the concrete, it is the same with the overhanging length of limb end plate to wrap up in the thickness that covers the concrete, the side of the closed cavity that needs to fill core concrete in the wall limb steel pipe chamber is equipped with and supplies the concrete to pass through the hole, the hole is array or plum blossom form and distributes, the inside core concrete of wall limb steel pipe chamber and the wrapping up of the outside cover the concrete and. The concrete of steel pipe inside and outside is pour simultaneously, connects through the hole and forms wholly, effectively prevents to wrap up in the concrete and in the droing of use stage, and the corruption and the fire resistance problem of both sides steel sheet can be solved simultaneously to outside of tubes concrete, is fit for prefabricated production, and construction cost is low.

Description

Concrete-filled steel tube shear wall with concrete wrapped on side surface

Technical Field

The utility model relates to a building engineering technical field, concretely relates to side parcel covers concrete filled steel tube shear force wall of concrete.

Background

The single-cavity and multi-cavity concrete-filled steel tube shear wall has good mechanical properties and construction properties, so that the single-cavity and multi-cavity concrete-filled steel tube shear wall is widely applied to multi-story and super high-rise building structures. On one hand, the steel tube concrete shear wall can reduce the thickness of the shear wall and improve the earthquake-resistant ductility of the shear wall due to the good constraint effect of the steel tube on the core concrete; on the other hand, the steel pipe serves as a template for core concrete construction, so that the construction cost of the shear wall can be greatly reduced. The main problems existing in the application of the current concrete-filled steel tube shear wall are that the steel tube is easy to corrode outside the concrete and is easy to be softened by fire in case of fire, and the cost of anticorrosion and fireproof treatment is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a steel pipe concrete shear force wall of concrete is wrapped up in to side has good anticorrosion and fire behavior.

In order to achieve the above object, the utility model adopts the following technical scheme: a concrete-filled steel tube shear wall with concrete wrapped on the side surface comprises at least one wall limb steel tube cavity with a closed cavity, wherein the wall limb steel tube cavity is formed by welding a limb end plate, a corner steel tube and a plurality of wall limb section steels, the extending lengths of the limb end plate relative to the two sides of the wall limb steel tube cavity are respectively not less than 20mm, core concrete is filled in the wall limb steel tube cavity, wrapping concrete is arranged on the outer side of the wall limb steel tube cavity, the thickness of the wrapping concrete is the same as the extending length of the limb end plate,

the side of the closed cavity that needs to fill core concrete in the wall limb steel tube chamber is equipped with the hole that supplies the concrete to pass through, and the clear distance of outside hole to limb end plate is greater than 50mm, the hole is array or plum blossom form and distributes, the inside core concrete of wall limb steel tube chamber and the wrapping up in the outside cover the concrete and pass through the hole is connected as whole.

Preferably, the shape of the hole is one or more of a circle, an ellipse and a polygon without acute angles, and the aperture is not less than 1.5 times of the particle size of the coarse aggregate of the core concrete.

Preferably, the section of the concrete filled steel tube shear wall is in one of a straight line shape, a T shape, an L shape, a cross shape or a Z shape.

Preferably, the limb end plate is a flat steel plate or a coiled flat steel plate, the thickness of the limb end plate is more than 6mm, and the ratio of the width of the wall limb steel tube cavity to the thickness of the limb end plate is less than 80.

Preferably, the wall limb section steel is section steel with one or more combinations of section steel with two parallel surfaces, parallel opposite double steel plates, round steel pipes and oval steel pipes, such as U-shaped steel, rectangular steel pipes and H-shaped steel.

Preferably, the steel materials of the limb end plate, the corner steel pipe and the wall limb section steel are carbon structural steel or low alloy steel, and the quality grade of the steel materials is not lower than grade B.

Preferably, the core concrete and the wrapping concrete are one of common concrete, recycled concrete, high-strength concrete and high-performance concrete, and the strength grade of the concrete is not less than C30.

Further, when the thickness of the wrapped concrete is larger than 50mm, a steel bar net piece or a fiber net piece is arranged in the wrapped concrete.

Preferably, the welding is a continuous weld joint.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the concrete inside and outside the steel pipe cavity of the wall limb is connected into a whole through the hole, so that the wrapping concrete is effectively prevented from falling off in the use stage.

2. The concrete outside the wall limb steel pipe cavity can simultaneously solve the problems of corrosion and fire resistance of steel plates on two sides of the shear wall. Consider that limb end board side has filled the wall body usually and links to each other, the utility model discloses can the fire prevention and the anticorrosive cost of greatly reduced steel pipe concrete shear force wall.

3. The concrete in the steel pipe cavity can be effectively restrained by the wall limb steel pipe cavity, the mechanical property of the concrete in the steel pipe cavity is improved, and the concrete in the steel pipe cavity and the concrete outside the steel pipe cavity can prevent the early buckling of the steel pipe under external load.

4. The member is suitable for factory prefabricated production, the using amount of construction templates is small, the construction period is prolonged, and therefore the construction cost can be greatly reduced.

5. The holes of the wall limb steel pipe cavities are beneficial to the floor slab steel bars to pass through, and the problem that the floor slab steel bars of the traditional steel pipe concrete shear wall are complicated to anchor is solved.

Drawings

Fig. 1 is a schematic view of a wall limb steel pipe cavity in embodiment 1 of the present invention;

fig. 2 is a schematic view of a cross-shaped concrete filled steel tube shear wall according to embodiment 1 of the present invention;

fig. 3 is a schematic view of a wall limb steel pipe cavity in embodiment 2 of the present invention;

fig. 4 is a schematic view of a T-shaped concrete filled steel tube shear wall according to embodiment 2 of the present invention;

fig. 5 is a schematic view of a wall limb steel pipe cavity in embodiment 3 of the present invention;

fig. 6 is a schematic view of a steel tube concrete shear wall in a straight shape according to embodiment 3 of the present invention;

in the figure, 1, extremity plate; 2. corner steel pipes; 31. u-shaped steel; 32. round steel pipes; 33. h-shaped steel; 34. a double steel plate; 35. a rectangular steel pipe; 36. a hole; 4. core concrete; 5. wrapping concrete; 6. and (4) reinforcing steel bar meshes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The utility model provides a concrete filled steel tube shear force wall of concrete is wrapped up in to cross side, it comprises four limb end plates 1, a corner steel pipe 2, four U shaped steel 31, a round steel pipe 32, an H shaped steel 33 and six pairs of parallel double steel plate 34 high frequency welding and contains the wall limb steel tube chamber of 10 closed cavities, every independent closed cavity lateral wall all offers the hole 36 that supplies the concrete to pass through except that round steel pipe 32, and the clear distance of 36 to limb end plate 1 in the outside hole is greater than 50mm, each 30mm of the overhanging length in both sides for wall limb steel tube chamber of limb end plate 1, its structure is as shown in figure 1. Limb end plate 1 is 12 mm's of thickness flat steel plate, and the width of wall limb steel tube chamber is 190mm, the hole 36 of wall limb steel tube chamber side is array distribution, the hole 36 shape is circular, and the aperture is 60 mm. The steel materials of the limb end plate 1, the corner steel pipe 2, the U-shaped steel 31, the round steel pipe 32, the H-shaped steel 33 and the double steel plate 34 are all carbon structural steel Q235B.

The inner part of the wall limb steel pipe cavity is filled with core concrete 4; the outer side of the steel pipe cavity of the wall limb is provided with wrapping concrete 5, and the thickness of the wrapping concrete 5 is the same as the extending length of the limb end plate 1. The core concrete 4 filled inside the wall limb steel tube cavity and the wrapping concrete 5 outside the wall limb steel tube cavity are both common concrete, and the strength grade of the concrete is C40. The structure is shown in fig. 2.

Example 2

A concrete-filled steel tube shear wall with a T-shaped side surface coated with concrete is characterized in that three limb end plates 1, a corner steel tube 2, two U-shaped steel 31, one H-shaped steel 33 and four pairs of parallel double steel plates 34 are automatically welded to form a limb steel tube cavity with 7 closed cavities, each independent closed cavity comprises a side hole 36 for concrete to pass through, the clear distance from the outermost side hole 36 to the limb end plate 1 is larger than 50mm, the two sides of each limb end plate 1, relative to the limb steel tube cavity, extend outwards by 40mm, and the structure of the concrete-filled steel tube shear wall is shown in figure 3. The limb end plate 1 is a flat steel plate with the thickness of 16mm, the width of a wall limb steel tube cavity is 220mm, and holes 36 on the side surface of the wall limb steel tube cavity are distributed in a local array shape and a local plum blossom shape; the holes 36 are circular in shape and have an aperture of 80 mm. The steel materials of the limb end plate 1, the corner steel pipe 2, the U-shaped steel 31, the H-shaped steel 33 and the double steel plate 34 are all low alloy steel Q345B.

The inner part of the wall limb steel pipe cavity is filled with core concrete 4; the outer side of the steel pipe cavity of the wall limb is provided with wrapping concrete 5, and the thickness of the wrapping concrete 5 is the same as the extending length of the limb end plate 1. The core concrete 4 filled inside the steel tube cavity of the wall limb and the wrapping concrete 5 outside the steel tube cavity of the wall limb are high-strength concrete, the strength grade of the concrete is C65, and the structure is shown in FIG. 4.

Example 3

A concrete-filled steel tube shear wall with concrete wrapped on the side face is characterized in that a wall limb steel tube cavity comprising 6 closed cavities is formed by semi-automatically welding two limb end plates 1, two U-shaped steel 31, one H-shaped steel 33, one rectangular steel tube 35 and three pairs of parallel double steel plates 34, each independent closed cavity comprises a side hole 36 for concrete to pass through, the clear distance from the outermost side hole 36 to the limb end plate 1 is larger than 50mm, the two sides of each limb end plate 1, relative to the wall limb steel tube cavity, extend outwards for 65mm, and the structure is shown in fig. 5. The limb end plate 1 is a flat steel plate with the thickness of 14mm, the width of a wall limb steel tube cavity is 270mm, and holes 36 on the side surface of the wall limb steel tube cavity are distributed in an array manner; the shape of the hole 36 is oval, and the hole short diameter is 60 mm. The steel materials of the limb end plate 1, the corner steel pipe 2, the U-shaped steel 31, the H-shaped steel 33, the rectangular steel pipe 35 and the double steel plate 34 are all low alloy steel Q345B.

The inner part of the wall limb steel pipe cavity is filled with core concrete 4; the outer side of the steel pipe cavity of the wall limb is provided with wrapping concrete 5, and the thickness of the wrapping concrete 5 is the same as the extending length of the limb end plate 1. The core concrete 4 filled inside the wall limb steel tube cavity and the wrapping concrete 5 outside the wall limb steel tube cavity are high-performance concrete, and the strength grade of the concrete is C80. The interior of the wrapping concrete 5 is provided with a steel bar net piece 6, and the structure of the steel bar net piece is shown in figure 6.

It should be noted that, it still belongs to the protection category of this patent to add welding stiffeners to the limb end plates and the wall limb steel sections, configure steel bars or steel sections in the concrete inside the wall limb steel tube cavity, and add connectors in the holes on both sides to further improve the bearing capacity and stability of the shear wall.

Claims

1. A concrete-filled steel tube shear wall with concrete wrapped on the side surface is characterized by comprising a wall limb steel tube cavity which is formed by welding a limb end plate, a corner steel tube and a plurality of wall limb section steels and is not less than one closed cavity, wherein the extending lengths of the limb end plate relative to the two sides of the wall limb steel tube cavity are not less than 20mm respectively, core concrete is filled in the wall limb steel tube cavity, wrapping concrete is arranged on the outer side of the wall limb steel tube cavity, the thickness of the wrapping concrete is the same as the extending length of the limb end plate,

2. The concrete-filled steel tube shear wall with the lateral wrapping concrete according to claim 1, wherein the holes are one or more of circular, oval and polygonal without acute angles, and the hole diameter is not less than 1.5 times of the grain diameter of the coarse aggregate of the filled concrete.

3. A concrete filled steel tube shear wall with concrete coated on the side surfaces according to claim 1, wherein the section of the concrete filled steel tube shear wall is in the form of one of a straight line, a T-shape, an L-shape, a cross-shape or a zigzag shape.

4. The concrete-filled steel tube shear wall of claim 1, wherein the limb end plates are flat steel plates or tape-wound flat steel plates, the thickness of the limb end plates is greater than 6mm, and the ratio of the width of the tube cavity of the wall limb steel tube to the thickness of the limb end plates is less than 80.

5. The concrete-filled steel tube shear wall with the lateral coating concrete according to claim 1, wherein the wall limb section steel is section steel with two parallel surfaces, one or more of parallel opposite double steel plates, round steel tubes and oval steel tubes.

6. The concrete-filled steel tube shear wall with the concrete coated on the side surface as claimed in claim 1, wherein the steel materials of the limb end plates, the corner steel tubes and the wall limb section steel are carbon structural steel or low alloy steel, and the quality grade of the steel materials is not lower than grade B.

7. The concrete-filled steel tube shear wall with the lateral coating concrete as claimed in claim 1, wherein the core concrete and the coating concrete are one of ordinary concrete, recycled concrete, high-strength concrete and high-performance concrete, and the strength grade of the concrete is not less than C30.

8. The concrete-filled steel tube shear wall with the lateral wrapped concrete according to claim 1, wherein when the thickness of the wrapped concrete is more than 50mm, a steel mesh or a fiber mesh is arranged inside the wrapped concrete.

9. The concrete filled steel tube shear wall of claim 1, wherein the welding is continuous welding.