Prefabricated outer-clad U-shaped steel plate-concrete composite beam and connection components

Abstract

The present invention discloses an assembled U-shaped steel plate-concrete composite beam and a connection assembly, wherein the connection assembly is composed of a male part and a female part; when splicing, the structures on the male part and the female part are staggered, and the male part and the female part do not contact each other and are matched with a large gap, and the gap between the male part and the female part is filled with concrete. The beneficial technical effect of the present invention is: an assembled U-shaped steel plate-concrete composite beam and a connection assembly are proposed, and the scheme can effectively reduce the manufacturing cost of the beam body and improve the convenience of splicing operation under the premise of ensuring a high connection strength.

Description

Technical Field

[0001] The invention relates to a concrete composite beam structure, in particular to an assembled externally wrapped U-shaped steel plate-concrete composite beam and a connecting component. Background Art

[0002] With the continuous development of the civil engineering industry, in pursuit of efficiency and economy, prefabricated structures and composite structures have emerged; when the outsourced U-shaped steel plate-concrete composite beam is constructed by assembly, in addition to the advantages of prefabricated structures, it can also give full play to the advantages of steel-concrete composite structures, with the advantages of good bearing performance and convenient construction.

[0003] In the prior art, when splicing the aforementioned composite beams, the usual practice is: first, the area on the beam body except the connection end is pre-cast and formed, and the end of the longitudinal steel bar in the beam body is exposed at the position corresponding to the connection end in the U-shaped steel plate. When splicing, the longitudinal steel bars in opposite positions on the two beam bodies are connected as a whole by mechanical connection or welding, and the ends of the two U-shaped steel plates are connected together by a connecting steel plate, and then concrete is poured in the U-shaped steel plate.

[0004] The existing problems are: the longitudinal steel bars are prefabricated parts. After they are made, it is very difficult to correct the structural parameters of the longitudinal steel bars; when mechanical connection is adopted, the matching accuracy of the longitudinal steel bars in the two beams is extremely high. If deviations occur, the subsequent correction process is extremely complicated. In order to ensure smooth subsequent assembly, the degree of refinement during production can only be improved, which will undoubtedly greatly increase the production cost; when on-site welding connection is adopted, the quality of on-site welds is difficult to guarantee and there is a heat-affected zone near the weld. The material there will become brittle, and welding residual stress and residual strain will easily occur. Cracks will easily appear after long-term use, and the cracks will easily expand and will easily break at low temperatures. Summary of the invention

[0005] In view of the problems in the background technology, the present invention proposes a connection assembly for splicing assembled composite beams, and its innovation lies in: the connection assembly is composed of a male part and a female part; the female part is composed of a first supporting steel plate and two first U-shaped steel plates; the large plane of the vertical section of the first U-shaped steel plate is perpendicular to the large plane of the first supporting steel plate; the large plane of the transverse section of the first U-shaped steel plate is parallel to the large plane of the first supporting steel plate; the bottom of the vertical section of the first U-shaped steel plate is fixedly connected to the large plane of the first supporting steel plate; the large planes of the vertical sections of the two first U-shaped steel plates are parallel to each other; the transverse sections of the two first U-shaped steel plates are opposite to each other and have a gap; the transverse section on the first U-shaped steel plate that is closest to the first supporting steel plate is recorded as the first transverse section, and the other transverse section is recorded as the second transverse section;

[0006] The public component is composed of a second support steel plate, a second cross-shaped steel plate and two L-shaped steel plates; the large plane of the vertical section of the second cross-shaped steel plate is perpendicular to the large plane of the second support steel plate; the large plane of the horizontal section of the second cross-shaped steel plate is parallel to the large plane of the second support steel plate; the bottom of the vertical section of the second cross-shaped steel plate is fixedly connected to the large plane of the second support steel plate; the large plane of the vertical section of the L-shaped steel plate is perpendicular to the large plane of the second support steel plate, and the large plane of the vertical section of the L-shaped steel plate is parallel to the large plane of the vertical section of the second cross-shaped steel plate; the end of the vertical section of the L-shaped steel plate is fixedly connected to the large plane of the second support steel plate; the two L-shaped steel plates are respectively located on both sides of the second cross-shaped steel plate, the horizontal sections of the L-shaped steel plates face inwards, and the two L-shaped steel plates are symmetrically positioned; the horizontal section of the second cross-shaped steel plate closest to the second support steel plate is denoted as the right horizontal section, and the other horizontal section is denoted as the left horizontal section; the horizontal section of the L-shaped steel plate is opposite to the right horizontal section and there is a gap; the space enclosed by the L-shaped steel plate and the second cross-shaped steel plate is denoted as the connection cavity;

[0007] During splicing, the first support steel plate and the second support steel plate are opposite in position and parallel to each other. The second cross-shaped steel plate is arranged between the two first cross-shaped steel plates. The left horizontal section is located inside the first horizontal section, and the right horizontal section is located in the area between the first horizontal section and the second horizontal section. The two second horizontal sections are respectively located in the two connection cavities; the distance between the two first horizontal sections is less than the dimension of the left horizontal section in the corresponding direction, and the distance between the two second horizontal sections is less than the dimension of the right horizontal section in the corresponding direction; the gap distance between the horizontal section of the L-shaped steel plate and the right horizontal section is less than the dimension of the second horizontal section in the corresponding direction; the distance between the outer ends of the two first horizontal sections is greater than the distance between the outer sides of the two L-shaped steel plates; the public component and the female component do not contact each other and are in large clearance fit, and the gap between the public component and the female component is filled with concrete.

[0008] During specific implementation, the number of the first cross-shaped steel plates and the second cross-shaped steel plates can be appropriately increased according to the transverse dimension of the splicing part (after the number is increased, if the number of the first cross-shaped steel plates is N, then the number of the second cross-shaped steel plates is N - 1); the spacing distance and the structural dimensions between the cross-shaped steel plates can be calculated by using the existing mechanical calculation theory according to the specific situation of the project. When installing the public component and the female component, it is preferably to make the second cross-shaped steel plate located on the symmetry center line of the two first cross-shaped steel plates.

[0009] Based on the above scheme, the present invention also proposes an assembled outward-wrapped U-shaped steel plate-concrete composite beam, which is formed by splicing two beam bodies, and its innovation lies in: one of the beam bodies is composed of a first U-shaped steel plate, the public component and a plurality of first longitudinal steel bars; the public component is arranged at a position corresponding to the connecting end of the beam body in the first U-shaped steel plate, the axial direction of the beam body is perpendicular to the second supporting steel plate on the public component, and the large plane of the vertical section of the second Chinese-steel plate is perpendicular to the bottom surface of the inner cavity of the first U-shaped steel plate; the first longitudinal steel bar is arranged in the first U-shaped steel plate, the axial direction of the first longitudinal steel bar is parallel to the axial direction of the beam body, the end of the first longitudinal steel bar is welded and fixed to the second supporting steel plate, and the plurality of first longitudinal steel bars are distributed in an array on the second supporting steel plate; concrete is poured in the area corresponding to the first longitudinal steel bar in the first U-shaped steel plate (cast once);

[0010] Another beam body is composed of a second U-shaped steel plate, the mother component and a plurality of second longitudinal steel bars; the mother component is arranged at a position corresponding to the connecting end of the beam body in the second U-shaped steel plate, the axial direction of the beam body is perpendicular to the first supporting steel plate on the mother component, and the large plane of the vertical section of the first Chinese-steel plate is perpendicular to the bottom surface of the inner cavity of the second U-shaped steel plate; the second longitudinal steel bars are arranged in the second U-shaped steel plate, the axial direction of the second longitudinal steel bars is parallel to the axial direction of the beam body, the end of the second longitudinal steel bars is welded and fixed to the first supporting steel plate, and the plurality of second longitudinal steel bars are distributed in an array on the first supporting steel plate; concrete is poured in the area corresponding to the second longitudinal steel bars in the second U-shaped steel plate (cast once);

[0011] During splicing, the male part is inserted into the female part, the end faces of the first U-shaped steel plate and the second U-shaped steel plate are in contact, and the contact surface of the first U-shaped steel plate and the second U-shaped steel plate is located in the area between the first supporting steel plate and the second supporting steel plate; a connecting steel plate is provided at the contact portion of the first U-shaped steel plate and the second U-shaped steel plate, the connecting steel plate is bolted to the U-shaped steel plate, and the space between the first supporting steel plate and the second supporting steel plate is filled with concrete (secondary pouring);

[0012] The beam body is a prefabricated part, and the concrete around the longitudinal reinforcement has been cast in advance.

[0013] The principle of the above scheme is: from the introduction of the background technology, it can be seen that in order to make the longitudinal steel bars in the two beams bear coaxial force as a whole, the position matching accuracy of the longitudinal steel bars in the two beams needs to reach a higher standard, which will undoubtedly greatly increase the construction cost of the beam and weaken the economic advantage of the prefabricated composite beam; after adopting the scheme of the present invention, the longitudinal steel bars in the beam do not need to be directly connected, and the longitudinal steel bars are connected through a structure composed of male parts, female parts and concrete bodies, which can avoid the requirements for the position matching accuracy of the longitudinal steel bars of the two beams during welding or mechanical connection, and greatly reduce the construction cost of the beam; from the perspective of splicing convenience, since the male parts and female parts can be matched with a large gap, the position adjustment margin is large, which can greatly improve the convenience of splicing; from the perspective of connection strength, since the structures on the male parts and female parts are staggered with each other, and the corresponding structures exist in the axial direction of the beam body. Interference (i.e. the spacing between the two first transverse sections is smaller than the size of the left transverse section in the corresponding direction, the spacing between the two second transverse sections is smaller than the size of the right transverse section in the corresponding direction; the spacing between the transverse section of the L-shaped steel plate and the right transverse section is smaller than the size of the second transverse section in the corresponding direction; the distance between the outer ends of the two first transverse sections is larger than the distance between the outer sides of the two L-shaped steel plates). After the concrete is poured, the male parts and the female parts form a very close connection relationship. When the composite beam is subjected to axial force and bending moment, the male parts, the female parts and the surrounding concrete body can cooperate to bear the force, effectively improving the connection strength of the connection part; from the processing point of view, the male parts and the female parts can be pre-processed in batches separately. When the beam body is prefabricated, the male parts or the female parts are installed on the U-shaped steel plate, which can effectively improve the standardization of the beam body processing and reduce the production cost.

[0014] The beneficial technical effect of the present invention is: an assembled U-shaped steel plate-concrete composite beam and a connection assembly are proposed, which can effectively reduce the manufacturing cost of the beam body and improve the convenience of splicing operation while ensuring a high connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 , top view of the mother part;

[0016] Figure 2 , top view of the official document;

[0017] Figure 3 , schematic diagram of the splicing state of the male and female parts (the concrete body is hidden in the figure);

[0018] Figure 4 , a three-dimensional structural schematic diagram of the composite beam of the present invention (the concrete body is hidden in the figure);

[0019] Figure 5 , three-dimensional diagram of official documents;

[0020] Figure 6 , stereogram of the mother part;

[0021] The names corresponding to the various marks in the figure are: first supporting steel plate 1, first U-shaped steel plate 2, second supporting steel plate 3, second U-shaped steel plate 4, L-shaped steel plate 5, U-shaped steel plate 6, longitudinal reinforcement 7, and connecting steel plate 8. DETAILED DESCRIPTION

[0022] A connection assembly for splicing assembled composite beams, the innovation of which is that: the connection assembly is composed of a male part and a female part; the female part is composed of a first supporting steel plate 1 and two first U-shaped steel plates 2; the large plane of the vertical section of the first U-shaped steel plate 2 is perpendicular to the large plane of the first supporting steel plate 1; the large plane of the transverse section of the first U-shaped steel plate 2 is parallel to the large plane of the first supporting steel plate 1; the bottom of the vertical section of the first U-shaped steel plate 2 is fixedly connected to the large plane of the first supporting steel plate 1; the large planes of the vertical sections of the two first U-shaped steel plates 2 are parallel to each other; the transverse sections of the two first U-shaped steel plates 2 are opposite to each other and have a gap; the transverse section of the first U-shaped steel plate 2 that is closest to the first supporting steel plate 1 is recorded as the first transverse section, and the other transverse section is recorded as the second transverse section;

[0023] The public component is composed of a second supporting steel plate 3, a second Chinese-steel plate 4 and two L-shaped steel plates 5; the large plane of the vertical section of the second Chinese-steel plate 4 is perpendicular to the large plane of the second supporting steel plate 3; the large plane of the transverse section of the second Chinese-steel plate 4 is parallel to the large plane of the second supporting steel plate 3; the bottom of the vertical section of the second Chinese-steel plate 4 is fixedly connected to the large plane of the second supporting steel plate 3; the large plane of the vertical section of the L-shaped steel plate 5 is perpendicular to the large plane of the second supporting steel plate 3, and the large plane of the vertical section of the L-shaped steel plate 5 is parallel to the large plane of the vertical section of the second Chinese-steel plate 4; the end of the vertical section of the L-shaped steel plate 5 is fixedly connected to the large plane of the second supporting steel plate 3; the two L-shaped steel plates 5 are respectively located on both sides of the second Chinese-steel plate 4, the transverse section of the L-shaped steel plate 5 faces inward, and the two L-shaped steel plates 5 are symmetrically positioned; the transverse section on the second Chinese-steel plate 4 that is closest to the second supporting steel plate 3 is recorded as the right transverse section, and the other transverse section is recorded as the left transverse section; The transverse section of the L-shaped steel plate 5 is opposite to the right transverse section and there is a gap between them; the space enclosed by the L-shaped steel plate 5 and the second stem-shaped steel plate 4 is recorded as a connecting cavity;

[0024] During splicing, the first support steel plate 1 and the second support steel plate 3 are in opposite positions and parallel to each other. The second cross-shaped steel plate 4 is arranged between two first cross-shaped steel plates 2. The left horizontal section is located inside the first horizontal section, and the right horizontal section is located in the area between the first horizontal section and the second horizontal section. The two second horizontal sections are respectively located in two connecting cavities; the spacing distance between the two first horizontal sections is less than the dimension of the left horizontal section in the corresponding direction, and the spacing distance between the two second horizontal sections is less than the dimension of the right horizontal section in the corresponding direction; the spacing distance between the horizontal section of the L-shaped steel plate 5 and the right horizontal section is less than the dimension of the second horizontal section in the corresponding direction; the distance between the outer ends of the two first horizontal sections is greater than the distance between the outer sides of the two L-shaped steel plates 5; the male part and the female part do not contact each other and are in large clearance fit, and the gap between the male part and the female part is filled with concrete.

[0025] An assembled external-wrapped U-shaped steel plate-concrete composite beam using the aforementioned connection components. The assembled external-wrapped U-shaped steel plate-concrete composite beam is spliced by two beam bodies. Its innovation lies in: one beam body is composed of a first U-shaped steel plate, the male part, and multiple first longitudinal steel bars; the male part is arranged at a position corresponding to the connection end of the beam body inside the first U-shaped steel plate. The axial direction of the beam body is perpendicular to the second support steel plate 3 on the male part. The large plane of the vertical section of the second cross-shaped steel plate 4 is perpendicular to the bottom surface of the inner cavity of the first U-shaped steel plate; the first longitudinal steel bars are arranged in the first U-shaped steel plate. The axial direction of the first longitudinal steel bars is parallel to the axial direction of the beam body. The ends of the first longitudinal steel bars are welded and fixed to the second support steel plate 3, and multiple first longitudinal steel bars are arranged in an array on the second support steel plate 3; concrete is poured in the area of the first U-shaped steel plate corresponding to the first longitudinal steel bars;

[0026] The other beam body is composed of a second U-shaped steel plate, the female part, and multiple second longitudinal steel bars; the female part is arranged at a position corresponding to the connection end of the beam body inside the second U-shaped steel plate. The axial direction of the beam body is perpendicular to the first support steel plate 1 on the female part. The large plane of the vertical section of the first cross-shaped steel plate 2 is perpendicular to the bottom surface of the inner cavity of the second U-shaped steel plate; the second longitudinal steel bars are arranged in the second U-shaped steel plate. The axial direction of the second longitudinal steel bars is parallel to the axial direction of the beam body. The ends of the second longitudinal steel bars are welded and fixed to the first support steel plate 1, and multiple second longitudinal steel bars are arranged in an array on the first support steel plate 1; concrete is poured in the area of the second U-shaped steel plate corresponding to the second longitudinal steel bars;

[0027] During splicing, the male part is inserted into the female part. The end faces of the first U-shaped steel plate and the second U-shaped steel plate are in contact. The contact surface of the first U-shaped steel plate and the second U-shaped steel plate is located in the area between the first support steel plate 1 and the second support steel plate 3; a connecting steel plate is arranged at the contact part of the first U-shaped steel plate and the second U-shaped steel plate. The connecting steel plate is bolted to the U-shaped steel plate, and the space between the first support steel plate 1 and the second support steel plate 3 is filled with concrete;

[0028] The beam body is a prefabricated part, and the concrete around the longitudinal reinforcement has been cast in advance.

[0029] During specific implementation, the supporting steel plate 1 and the longitudinal reinforcement 7 are connected by a perforation plug welding process.

Claims

1. A connection assembly of an assembled U-shaped steel plate-concrete composite beam, characterized in that: The connecting assembly is composed of a male part and a female part; the female part is composed of a first supporting steel plate (1) and two first Chinese-steel-shaped steel plates (2); the large plane of the vertical section of the first Chinese-steel-shaped steel plate (2) is perpendicular to the large plane of the first supporting steel plate (1); the large plane of the transverse section of the first Chinese-steel-shaped steel plate (2) is parallel to the large plane of the first supporting steel plate (1); the bottom of the vertical section of the first Chinese-steel-shaped steel plate (2) is fixedly connected to the large plane of the first supporting steel plate (1); the large planes of the vertical sections of the two first Chinese-steel-shaped steel plates (2) are parallel to each other; the transverse sections of the two first Chinese-steel-shaped steel plates (2) are opposite to each other and have a gap; the transverse section of the first Chinese-steel-shaped steel plate (2) that is closest to the first supporting steel plate (1) is recorded as the first transverse section, and the other transverse section is recorded as the second transverse section; The male component is composed of a second supporting steel plate (3), a second U-shaped steel plate (4) and two L-shaped steel plates (5); the large plane of the vertical section of the second U-shaped steel plate (4) is perpendicular to the large plane of the second supporting steel plate (3); the large plane of the transverse section of the second U-shaped steel plate (4) is parallel to the large plane of the second supporting steel plate (3); the bottom of the vertical section of the second U-shaped steel plate (4) is fixedly connected to the large plane of the second supporting steel plate (3); the large plane of the vertical section of the L-shaped steel plate (5) is perpendicular to the large plane of the second supporting steel plate (3); The L-shaped steel plate (5) is straight, the large plane of the vertical section of the L-shaped steel plate (5) is parallel to the large plane of the vertical section of the second Chinese-steel plate (4); the end of the vertical section of the L-shaped steel plate (5) is fixedly connected to the large plane of the second support steel plate (3); the two L-shaped steel plates (5) are respectively located on both sides of the second Chinese-steel plate (4), the transverse section of the L-shaped steel plate (5) faces inward, and the two L-shaped steel plates (5) are symmetrically positioned; the transverse section of the second Chinese-steel plate (4) closest to the second support steel plate (3) is recorded as the right transverse section, and the other transverse section is recorded as the left transverse section; the transverse section of the L-shaped steel plate (5) is opposite to the right transverse section and there is a gap; the space enclosed by the L-shaped steel plate (5) and the second Chinese-steel plate (4) is recorded as the connecting cavity; During splicing, the first supporting steel plate (1) and the second supporting steel plate (3) are positioned relative to each other and parallel to each other, the second "L"-shaped steel plate (4) is arranged between the two first "L"-shaped steel plates (2), the left transverse section is located on the inner side of the first transverse section, the right transverse section is located in the area between the first transverse section and the second transverse section, and the two second transverse sections are respectively located in the two connecting cavities; the spacing distance between the two first transverse sections is smaller than the size of the left transverse section in the corresponding direction, and the spacing distance between the two second transverse sections is smaller than the size of the right transverse section in the corresponding direction; the spacing distance between the transverse section of the L-shaped steel plate (5) and the right transverse section is smaller than the size of the second transverse section in the corresponding direction; the distance between the outer ends of the two first transverse sections is larger than the distance between the outer side surfaces of the two L-shaped steel plates (5); the male part and the female part do not contact each other and are matched with a large gap, and the gap between the male part and the female part is filled with concrete.

2. An assembled U-shaped steel plate-concrete composite beam using the connection assembly of claim 1, wherein the assembled U-shaped steel plate-concrete composite beam is formed by splicing two beam bodies, and is characterized in that: One of the beam bodies is composed of a first U-shaped steel plate, the male part and a plurality of first longitudinal steel bars; the male part is arranged at a position corresponding to the connecting end of the beam body in the first U-shaped steel plate, the axial direction of the beam body is perpendicular to the second supporting steel plate (3) on the male part, and the large plane of the vertical section of the second Chinese-steel plate (4) is perpendicular to the bottom surface of the inner cavity of the first U-shaped steel plate; the first longitudinal steel bars are arranged in the first U-shaped steel plate, the axial direction of the first longitudinal steel bars is parallel to the axial direction of the beam body, the end of the first longitudinal steel bars is welded and fixed to the second supporting steel plate (3), and the plurality of first longitudinal steel bars are distributed in an array on the second supporting steel plate (3); concrete is poured in the area of ​​the first U-shaped steel plate corresponding to the first longitudinal steel bars; Another beam body is composed of a second U-shaped steel plate, the mother component and a plurality of second longitudinal steel bars; the mother component is arranged at a position corresponding to the connecting end of the beam body in the second U-shaped steel plate, the axial direction of the beam body is perpendicular to the first supporting steel plate (1) on the mother component, and the large plane of the vertical section of the first Chinese-steel plate (2) is perpendicular to the bottom surface of the inner cavity of the second U-shaped steel plate; the second longitudinal steel bars are arranged in the second U-shaped steel plate, the axial direction of the second longitudinal steel bars is parallel to the axial direction of the beam body, the end of the second longitudinal steel bars is welded and fixed to the first supporting steel plate (1), and the plurality of second longitudinal steel bars are distributed in an array on the first supporting steel plate (1); concrete is poured in the area corresponding to the second longitudinal steel bars in the second U-shaped steel plate; During splicing, the male part is inserted into the female part, the end faces of the first U-shaped steel plate and the second U-shaped steel plate are in contact, and the contact surface of the first U-shaped steel plate and the second U-shaped steel plate is located in the area between the first supporting steel plate (1) and the second supporting steel plate (3); a connecting steel plate is provided at the contact portion of the first U-shaped steel plate and the second U-shaped steel plate, the connecting steel plate is bolted to the U-shaped steel plate, and the space between the first supporting steel plate (1) and the second supporting steel plate (3) is filled with concrete; The beam body is a prefabricated part, and the concrete around the longitudinal reinforcement has been cast in advance.

Images