CN205421714U - Compound carrier bar that excels in of circular top flange steel reinforced concrete - Google Patents

Abstract

The utility model discloses a circular upper flange steel-concrete composite high-strength load-bearing beam, which mainly relates to the field of load-bearing beams in steel structures. It includes an upper flange, a lower flange plate and a web plate, the upper flange includes an outer circular steel pipe, the circular steel pipe is provided with a first concrete filling body corresponding to it, and the lower flange plate It is a rolled steel plate arranged horizontally, and the web plate includes a rectangular steel plate arranged vertically, and vertical round steel pipes are evenly distributed on the rectangular steel plate, and a second concrete filler corresponding to it is arranged inside the round steel pipe , a triangular reinforcing rib is arranged between the round steel pipe and the lower flange plate. The beneficial effects of the utility model are: it adopts the upper flange of the circular structure, and uses the combination of the outer layer steel structure and the inner layer concrete to effectively improve the load-bearing performance, compressive resistance and bending resistance of the load-bearing beam; and adopts the composite structure The web support increases the bending, torsion and deformation resistance of the web, significantly improving the overall stability.

Description

A steel-concrete composite high-strength load-bearing beam with a circular upper flange

technical field

The utility model relates to the field of steel structure building load-bearing beams, in particular to a circular upper flange steel-concrete composite high-strength load-bearing beam.

Background technique

At present, with the rapid development of economy and society, the construction industry is advancing by leaps and bounds. People have higher and higher requirements for load-bearing components in building structures. They not only put forward higher requirements for load-bearing strength, but also continue to pursue lower consumables. and cost.

In the traditional construction industry, the load-bearing beams in general steel structures are mostly in the form of hot-rolled I-beams, hot-rolled or welded H-beams, hot-rolled square steel pipes, welded corrugated web girders, and welded box girders. Among them, if hot-rolled I-beams, hot-rolled or welded H-beams and welded corrugated web girders are used, straight steel plates or corrugated steel plates are used as webs, because the out-of-plane bending resistance of straight steel plates and corrugated steel plates is poor Therefore, the stability, bending resistance and torsional performance of the above-mentioned load-bearing beams are weak, and cannot meet the requirements of some special high-bearing structures. If the out-of-plane bending resistance of the web is improved by increasing the thickness of the web, the amount of steel used for the load-bearing beam will be greatly increased, and the self-weight of the load-bearing beam will also be increased, resulting in waste of steel and increased cost.

Structurally, when the upper flange of the I-beam in the prior art bears the concentrated load transmitted by the secondary beam, local yield damage or local buckling deformation will occur, which seriously affects the safety performance of the overall structure.

In addition, for welded box girders and hot-rolled square steel pipe girders, the cross-section of this type of load-bearing beam is box-shaped, which optimizes the performance of the component and enhances the bending resistance, deformation resistance, and torsion resistance of the component. However, due to its cross-sectional area Larger, the overall steel consumption of the component is very large, and it will also increase the self-weight of the load-bearing beam, resulting in waste of steel and increasing the cost of construction. At the same time, due to the closed cross-section of the above-mentioned steel pipe beam, the adaptability to thermal expansion and contraction is not as good as that of open steel beams such as H-shaped and I-shaped steel, which has certain disadvantages.

Utility model content

The purpose of this utility model is to provide a steel-concrete composite high-strength load-bearing beam with a circular upper flange. It adopts a circular upper flange and uses a combination of outer steel structure and inner concrete to effectively improve the bearing capacity of the load-bearing beam. Performance, compressive and bending resistance; and the web support of composite structure is used to increase the bending, torsion and deformation resistance of the web, so that the overall stability is significantly improved.

The utility model realizes above-mentioned purpose by following technical scheme:

A steel-concrete composite high-strength load-bearing beam with a circular upper flange, including an upper flange, a lower flange plate and a web, the upper flange includes an outer circular steel pipe, and the circular steel pipe is provided with a Compatible with the first concrete filling body, the lower flange plate is a rolled steel plate arranged horizontally, the web plate includes a rectangular steel plate arranged vertically, and vertical round steel pipes are evenly distributed on the rectangular steel plate, so The round steel pipe is provided with a second concrete filling body corresponding thereto, and a triangular reinforcing rib is arranged between the round steel pipe and the lower flange plate.

The pipe wall thickness of the circular steel pipe is 5.0mm-10.0mm, and its diameter is 1/2-1/4 of the width of the lower flange plate.

The thickness of the lower flange plate is 6.0mm-18.0mm, and its width corresponds to that of the upper flange.

The round steel pipe is a seamless hot-rolled steel pipe with a thickness of 6.0 mm to 12.0 mm, and its diameter is 3/4 of the width of the lower flange plate, and the rectangular steel plate is a rolled steel plate with a thickness of 6.0 mm to 18.0 mm.

The reinforcing rib is a rolled steel plate with a thickness of 6.0 mm to 10.0 mm.

A polyurethane foam layer is provided between the circular steel pipe and the first concrete filling body, and a polyurethane foam layer is also provided between the circular steel pipe and the second concrete filling body.

Both the first concrete filling body and the second concrete filling body are self-compacting high-strength concrete filling bodies whose strength is greater than C60.

Compared with the prior art, the beneficial effects of the utility model are:

1. The upper flange adopts a circular structure, which effectively improves the compressive performance. The circular pipe is used in conjunction with the first concrete filling body, which can not only enhance the load-bearing capacity of the top, but also avoid the consumption of a large amount of steel materials, effectively reducing the production cost.

The web adopts a combination of three composite structures: round steel pipe, rectangular steel plate, and reinforcement ribs. The addition of round steel pipes and reinforcement ribs can effectively improve the overall stability of the web, and enhance its bending resistance, shear resistance, and torsion resistance. , Anti-deformation performance. The round steel pipe is used in conjunction with the second concrete filling body, which can not only enhance the durable compressive capacity of the web, but also reduce consumable materials and save construction costs.

The lower flange plate echoes the upper flange, which is conducive to maintaining overall stability.

To sum up, the utility model uses a variety of structures to cooperate, and through the combination of structures to improve the bearing capacity and make it resistant to compression and durable. Moreover, the structural characteristics of steel tube composite concrete make it easy to realize standardized control of design and quality, large-scale operation of production, and serialized layout of products, which are conducive to improving production efficiency and saving production and construction costs. On the premise of ensuring the strength of components, Get better economic benefits.

2. The polyurethane foam layer is sprayed between the circular steel pipe and the first concrete filling body, as well as between the round steel pipe and the second concrete filling body, to reserve a certain buffer space for the volume change due to thermal expansion and contraction, so as to avoid Adjacent steel pipes and concrete blocks are extruded or split, thereby increasing the adaptability of the device to the environment and the durability of bearing and compressing.

3. The size setting of the above-mentioned round steel pipe, round steel pipe, lower flange plate, rectangular steel plate, etc., taking into account the cost of consumables and the optimal range of load-bearing strength.

4. Both the first concrete filling body and the second concrete filling body use self-compacting high-strength concrete with a strength greater than C60, which further improves the load-bearing and compression-resistant performance of the device.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the transverse sectional view of the utility model.

Accompanying drawing 3 is the A-A sectional view of accompanying drawing 2 of the present utility model.

Accompanying drawing 4 is the B-B sectional view of accompanying drawing 2 of the utility model.

Accompanying drawing 5 is the C-C sectional view of accompanying drawing 2 of the present utility model.

Labels shown in the accompanying drawings:

1. Upper flange; 11. Round steel pipe; 12. First concrete filling body;

2. Lower flange plate;

3. Web plate; 31. Rectangular steel plate; 32. Round steel pipe; 33. Second concrete filling body; 34. Reinforcing rib.

detailed description

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

The utility model is a steel-concrete composite high-strength load-bearing beam with a circular upper flange 1. The main structure includes an upper flange 1, a lower flange plate 2 and a web 3. The upper flange 1 includes an outer layer A circular steel pipe 11, the first concrete filling body 12 adapted to it is arranged inside the circular steel pipe 11, the lower flange plate 2 is a rolled steel plate arranged horizontally, and the web 3 includes a vertically arranged Rectangular steel plate 31, vertical round steel pipe 32 is evenly distributed on the rectangular steel plate 31, the second concrete filling body 33 suitable for it is arranged in the described round steel pipe 32, described round steel pipe 32 and lower flange plate 2 Triangular reinforcing ribs 34 are provided between them.

The wall thickness of the circular steel pipe 11 is 5.0mm-10.0mm, and its diameter is 1/2-1/4 of the width of the lower flange plate 2 .

The thickness of the lower flange plate 2 is 6.0 mm to 18.0 mm, and its width corresponds to that of the upper flange 1 .

The round steel pipe 32 is a seamless hot-rolled steel pipe with a thickness of 6.0 mm to 12.0 mm, and its diameter is 3/4 of the width of the lower flange plate 2, and the rectangular steel plate 31 is a rolled steel plate with a thickness of 6.0 mm. mm ~ 18.0mm.

The reinforcing rib 34 is a rolled steel plate with a thickness of 6.0mm-10.0mm.

A polyurethane foam layer is provided between the circular steel pipe 11 and the first concrete filling body 12 , and a polyurethane foam layer is also provided between the round steel pipe 32 and the second concrete filling body 33 .

Both the first concrete filling body 12 and the second concrete filling body 33 are self-compacting high-strength concrete filling bodies whose strength is greater than C60.

Compared with the prior art, the beneficial effects of the utility model are:

1. The upper flange 1 adopts a circular structure, which effectively improves the compressive performance. The circular pipe is used in conjunction with the first concrete filling body 12, which can not only enhance the load-bearing capacity of the top, but also avoid the consumption of a large amount of steel materials, effectively reducing the production cost.

The web 3 adopts a combination of three composite structures: a round steel pipe 32, a rectangular steel plate 31, and a reinforcing rib 34. The addition of the round steel pipe 32 and the reinforcing rib 34 can effectively improve the overall stability of the web 3 and enhance its resistance to corrosion. Bending, shearing, torsion and deformation resistance. The round steel pipe 32 is used in conjunction with the second concrete filling body 33, which can not only enhance the durable compression resistance of the web 3, but also reduce consumables and save construction costs.

The lower flange plate 2 echoes the upper flange 1, which is beneficial to maintain overall stability.

To sum up, the utility model uses a variety of structures to cooperate, and through the combination of structures to improve the bearing capacity and make it resistant to compression and durable. Moreover, the structural characteristics of steel tube composite concrete make it easy to realize standardized control of design and quality, large-scale operation of production, and serialized layout of products, which are conducive to improving production efficiency and saving production and construction costs. On the premise of ensuring the strength of components, Get better economic benefits.

2. The polyurethane foam layer is sprayed between the round steel pipe 11 and the first concrete filling body 12, as well as between the round steel pipe 32 and the second concrete filling body 33, to reserve a certain space for volume changes due to thermal expansion and contraction. Buffer space to avoid extrusion or splitting of adjacent steel pipes and concrete blocks, thereby increasing the adaptability of the device to the environment and the durability of load-bearing and compression resistance.

3. The dimensions of the above-mentioned round steel pipe 11, round steel pipe 32, lower flange plate 2, rectangular steel plate 31, etc. are set in an optimal range taking into account the cost of consumables and the load-bearing strength.

4. Both the first concrete filling body 12 and the second concrete filling body 33 use self-compacting high-strength concrete with a strength greater than C60, which further improves the load-bearing and compressive performance of the device.

Embodiment 1: The utility model describes a circular upper flange 1 steel-concrete composite high-strength load-bearing beam. The main structure includes an upper flange 1, a lower flange plate 2 and a web 3. The upper flange 1 It includes an outer circular steel pipe 11 , the wall thickness of which is 6.5 mm, and its diameter is 1/3 of the width of the lower flange plate 2 . The circular steel pipe 11 is provided with a first concrete filling body 12 adapted to it, a polyurethane foam layer is arranged between the circular steel pipe 11 and the first concrete filling body 12, and the lower flange plate 2 is horizontal As for the rolled steel plate, the thickness of the lower flange plate 2 is 8.0 mm, and its width corresponds to that of the upper flange 1 . The web 3 includes a vertically arranged rectangular steel plate 31, which is a rolled steel plate with a thickness of 8.0mm. Vertical round steel pipes 32 are evenly distributed on the rectangular steel plate 31, and the round steel pipes 32 are seamless hot-rolled steel pipes with a thickness of 7.0 mm, and their diameter is 3/4 of the width of the lower flange plate 2. The round steel pipe 32 is provided with a second concrete filling body 33 corresponding thereto, and a polyurethane foam layer is also arranged between the round steel pipe 32 and the second concrete filling body 33 . A triangular reinforcing rib 34 is provided between the round steel pipe 32 and the lower flange plate 2 . The reinforcing rib 34 is a rolled steel plate with a thickness of 6.5mm.

Embodiment 2: The utility model describes a circular upper flange 1 steel-concrete composite high-strength load-bearing beam. The main structure includes an upper flange 1, a lower flange plate 2 and a web 3. The upper flange 1 , web 3 and lower flange plate 2 are connected by fillet welding in turn, and the fillet weld strength should not be lower than the yield strength of the steel plate. The upper flange 1 includes an outer circular steel pipe 11 , the wall thickness of the circular steel pipe 11 is 9.5 mm, and its diameter is 2/5 of the width of the lower flange plate 2 . The circular steel pipe 11 is provided with a first concrete filling body 12 adapted to it, the lower flange plate 2 is a rolled steel plate arranged horizontally, the thickness of the lower flange plate 2 is 18.5 mm, and its The width corresponds to the upper flange 1. The web 3 includes a vertically arranged rectangular steel plate 31, the rectangular steel plate 31 is a rolled steel plate with a thickness of 15mm. Vertical round steel pipes 32 are evenly distributed on the rectangular steel plate 31, and the round pipes are connected with the rectangular steel plate 31 by fillet welding, and the fillet weld strength should not be lower than the yield strength of the steel plate. The round steel pipe 32 is a seamless hot-rolled steel pipe with a thickness of 11.0 mm, and its diameter is 3/4 of the width of the lower flange plate 2. The round steel pipe 32 is provided with a second concrete filling body 33 suitable for it. , A triangular reinforcing rib 34 is provided between the round steel pipe 32 and the lower flange plate 2 . The reinforcing rib 34 is a rolled steel plate with a thickness of 9mm. Both the first concrete filling body 12 and the second concrete filling body 33 are self-compacting high-strength concrete filling bodies whose strength is greater than C60.

Embodiment 3: The utility model describes a circular upper flange 1 steel-concrete composite high-strength load-bearing beam, which is obtained through the following manufacturing process:

(1) Preparation of consumables: according to the actual required size, cut off a steel plate with a certain width and length as the rectangular steel plate 31 in the web 3, cut a suitable right-angled triangle steel plate as the reinforcing rib 34, and cut out a certain length of round steel pipe 32. The length should be a part higher than the width of the rectangular steel plate 31, and it is necessary to process an arc-shaped groove that coincides with the circular steel pipe 11.

(2) Welding of the web 3 and the lower flange plate 2: First, the rectangular steel plate 31 and the round steel pipe 32 are welded together in the form of double-sided fillet welds at alternating intervals. When welding, it is necessary to ensure that the lower edges of all rectangular steel plates 31 and The lower edges of the round steel pipes 32 are all in the same horizontal plane, and the upper edges of all rectangular steel plates 31 and the lowest points of the round steel pipes 32 are all in the same horizontal plane, and the plane formed by all the rectangular steel plates 31 just crosses the central axis of the round steel pipes 32; , the rectangular steel plate 31 and the round steel pipe 32 welded together are placed on the lower flange plate 2, the plane centerline of the rectangular steel plate 31 must coincide with the centerline of the lower flange plate 2, and the rectangular steel plate 31 and the round steel pipe 32 are respectively connected to the The upper contact parts of the lower flange plate 2 are all welded together in the form of fillet welds;

(3) Injection of the composite layer: Fill polyurethane prepolymer, foaming agent, catalyst and other components in a pressure-resistant aerosol tank, and spray the aerosol colloid to the round steel pipe 32 and the round steel pipe 11 through the manual nozzle The surface of the inner wall is waiting for its attachment, molding, and foaming to complete the production of the polyurethane foam layer. After that, pour high-strength concrete into the inside of the round steel pipe 32. When filling, you must use a vibrating rod to vibrate while pouring, or use an iron tool to beat the wall of the round steel pipe 32 to ensure the compactness of the high-strength concrete; at the same time, pour the high-strength concrete into the round In the shaped steel pipe 11, during pouring, the circular steel pipe 11 is erected for pouring. During the pouring process, a vibrating rod is also required to continuously vibrate the wall of the circular steel pipe 11 to ensure the compactness of the high-strength concrete. After the completion of the two components Both require high temperature curing for 5-10 hours.

(4) Welding of the upper flange 1: center the circular steel pipe 11 on the top side of the web 3, and fillet weld the contact parts of the rectangular steel plate 31, the round steel pipe 32 and the circular steel pipe 11.

Claims (7)

1. circular top flange (1) the compound high-strength carrier bar of steel reinforced concrete, including top flange (1), bottom wing listrium (2) and web (3), it is characterized in that: described top flange (1) includes the round steel pipe (11) of outer layer, the the first Concrete Filled body (12) adapted with it it is provided with in described round steel pipe (11), described bottom wing listrium (2) is horizontally disposed rolled plate, described web (3) includes the rectangular steel plates (31) being vertically arranged, vertical round steel pipe (32) it is evenly distributed with in described rectangular steel plates (31), the the second Concrete Filled body (33) adapted with it it is provided with in described round steel pipe (32), the reinforcement (34) of triangle it is provided with between described round steel pipe (32) and bottom wing listrium (2).

A kind of circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterized in that: the pipe thickness of described round steel pipe (11) is 5.0mm～10.0mm, and the 1/2～1/4 of its a diameter of bottom wing listrium (2) width.

A kind of circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterised in that: the thickness of described bottom wing listrium (2) is 6.0mm～18.0mm, and its width is corresponding with top flange (1).

A kind of circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterized in that: described round steel pipe (32) be thickness be the seamless hot-finished steel tube of 6.0mm～12.0mm, and the 3/4 of its a diameter of bottom wing listrium (2) width, described rectangular steel plates (31) is rolled plate, and its thickness is 6.0mm～18.0mm.

The most circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterised in that: described reinforcement (34) be thickness be the rolled plate of 6.0mm～10.0mm.

A kind of circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterized in that: be provided with polyurethane foam between described round steel pipe (11) and the first Concrete Filled body (12), between described round steel pipe (32) and the second Concrete Filled body (33), be also provided with polyurethane foam.

A kind of circular compound high-strength carrier bar of top flange (1) steel reinforced concrete, it is characterised in that: described first Concrete Filled body (12) and the second Concrete Filled body (33) are the intensity self-compacting high-strength concrete obturator more than C60.