A long-span prefabricated beam and a prefabricated beam-column structure

Abstract

The present invention relates to the field of building structures, and discloses a long-span prefabricated beam and a prefabricated beam-column structure. The prefabricated beam-column structure includes the long-span prefabricated beam. The long-span prefabricated beam is used to be arranged at the top end of a column body and includes: a prefabricated beam body, an outer extension skeleton for connecting with the end part of an adjacent prefabricated beam body is arranged at the end part of the prefabricated beam body, a groove for embedding a cast-in-place concrete structure part is arranged at the end part of the prefabricated beam body, the cast-in-place concrete structure is used to be arranged at the top end of the column body and used to be connected with the top end of the column body, and the outer extension skeleton is wrapped in the cast-in-place concrete structure; a first connection structure, which is used to connect with both the prefabricated beam body and the column body. The prefabricated beam body of the long-span prefabricated beam provided by the present invention is prefabricated in a factory. Compared with the overall on-site casting of a long-span beam, the long-span prefabricated beam provided by the present invention has a shorter construction period and less human resources occupation.

Description

Technical Field

[0001] The present invention relates to the field of building structures, and particularly to a long-span prefabricated beam and a prefabricated beam-column structure. Background Art

[0002] In recent years, the construction industry in China has developed rapidly, and large public buildings, bridges, etc. are in large-scale construction. The construction of large public buildings, bridges, etc. often requires the use of long-span beams to build the framework. At present, long-span beams are generally fabricated by in-situ casting technology. Although the in-situ casting technology has advantages such as free space and shape, it also has disadvantages such as long construction period and large occupation of human resources.

[0003] In order to meet the rapid development of the construction industry and achieve an environment-friendly construction, it is of great significance to apply the prefabrication technology to the construction process of long-span beams. Therefore, how to provide a prefabricated long-span beam has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a long-span prefabricated beam with a short construction period and less occupation of human resources, and a prefabricated beam-column structure including the long-span prefabricated beam.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a long-span prefabricated beam for being arranged at the top end of a column, including:

[0007] A prefabricated beam body, an outrigger skeleton for connecting with the end part of an adjacent prefabricated beam body is arranged at the end part of the prefabricated beam body, a groove for embedding a cast-in-place concrete structure part is arranged at the end part of the prefabricated beam body, the cast-in-place concrete structure is used for being arranged at the top end of the column and connecting with the top end of the column, and the outrigger skeleton is wrapped in the cast-in-place concrete structure;

[0008] A first connection structure for connecting with both the prefabricated beam body and the column.

[0009] Optionally, the prefabricated beam body includes an internal skeleton and a concrete layer wrapped outside the internal skeleton, and a part of the internal skeleton extends out of the concrete layer to form the outrigger skeleton.

[0010] Optionally, the cross-section of the prefabricated beam body along the direction perpendicular to its own length is in an I shape.

[0011] Optionally, the internal skeleton includes a positive T-shaped skeleton and an inverted T-shaped skeleton arranged in sequence along the height direction of the prefabricated beam body. One end of the positive T-shaped skeleton extends out of the concrete layer to form the extended skeleton, and the other end of the positive T-shaped skeleton is connected to one end of the inverted T-shaped skeleton close to the positive T-shaped skeleton.

[0012] Optionally, the groove is an arc-shaped groove.

[0013] The present invention also provides an assembled beam-column structure, including:

[0014] At least two of the large-span assembled beams, all the prefabricated beam bodies are arranged in sequence, and the extended skeletons for connecting the two are arranged at the opposite ends of any two adjacent prefabricated beam bodies.

[0015] A column body, any two adjacent prefabricated beam bodies correspond to one column body, one column body corresponds to two of the first connection structures, and each of the first connection structures is used to be connected to the column body it corresponds to.

[0016] A cast-in-place concrete structure is arranged between any two adjacent prefabricated beam bodies. The cast-in-place concrete structure is used to wrap around the outside of the two extended skeletons connected to the two adjacent prefabricated beam bodies and is used to be partially embedded in the two grooves opposite to the two adjacent prefabricated beam bodies. The cast-in-place concrete structure corresponds to the column body one by one, and each of the cast-in-place concrete structures is used to be arranged on the column body it corresponds to and is used to be connected to the column body it corresponds to.

[0017] Optionally, the assembled beam-column structure further includes a second connection structure. Two of the second connection structures are arranged on each column body, and the two second connection structures arranged on the same column body are respectively used to be connected to the two first connection structures corresponding to the column body.

[0018] Optionally, the assembled beam-column structure further includes an intermediate connector. The first connection structure is a first T-shaped structure, and both flange portions of the first T-shaped structure are used to be connected to the prefabricated beam body. The second connection structure is a second T-shaped structure, and both flange portions of the second T-shaped structure are used to be connected to the column body. The intermediate connector is used to connect the webs of the first T-shaped structure and the second T-shaped structure.

[0019] Optionally, the assembled beam-column structure further includes a third connection structure and a fourth connection structure. The third connection structure is used to be detachably connected to the extended skeletons opposite to two adjacent prefabricated beam bodies, and the fourth connection structure is used to connect the cast-in-place concrete structure and the column body.

[0020] Optionally, the cast-in-place concrete structure is cast on-site using ultra-high performance concrete.

[0021] The present invention has achieved the following technical effects compared with the prior art:

[0022] The large-span prefabricated beam provided by the present invention is used to be arranged at the top of a column and includes: a prefabricated beam body, an outrigger skeleton is arranged at the end of the prefabricated beam body for connecting with the end of an adjacent prefabricated beam body, a groove for partially embedding a cast-in-place concrete structure is arranged at the end of the prefabricated beam body, the cast-in-place concrete structure is arranged at the top of the column and is connected to the top of the column, and the outrigger skeleton is wrapped in the cast-in-place concrete structure; a first connection structure, and the first connection structure is used to connect with both the prefabricated beam body and the column. The prefabricated beam body of the large-span prefabricated beam provided by the present invention is prefabricated in a factory, and only the connection positions of two adjacent prefabricated beam bodies and the connection positions of the prefabricated beam body and the column need to be cast on-site. Compared with the overall on-site casting of a large-span beam, the large-span prefabricated beam provided by the present invention has a shorter construction period and occupies less human resources. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the internal skeleton of the prefabricated beam-column structure in the embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the prefabricated beam-column structure in the embodiment of the present invention;

[0026] Figure 3 It is a schematic internal structural diagram of the prefabricated beam-column structure in the embodiment of the present invention;

[0027] Figure 4 It is a partial schematic structural diagram of the prefabricated beam-column structure in the embodiment of the present invention.

[0028] Figures 1 - 4 Description of the reference numerals: 1, first connection structure; 2, positive T-shaped skeleton; 3, inverted T-shaped skeleton; 4, groove; 5, cast-in-place concrete structure; 6, column; 7, second connection structure; 8, intermediate connector; 9, third connection structure; 10, fourth connection structure; 11, connector; 12, protrusion; 13, main body. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] The object of the present invention is to provide a long-span prefabricated beam with a short construction period and less human resources occupied, and a prefabricated beam-column structure including the long-span prefabricated beam.

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Referring to Figures 1 - 4 As shown, the long-span prefabricated beam provided in the embodiment of the present invention is used to be arranged at the top of the column 6 and includes: a prefabricated beam body and a first connection structure 1.

[0033] Specifically, the end of the prefabricated beam body is provided with an outrigger skeleton for connecting with the end of an adjacent prefabricated beam body. Outrigger skeletons are provided at the opposite ends of two adjacent prefabricated beam bodies, and the two adjacent prefabricated beam bodies are connected together by connecting the two outrigger skeletons.

[0034] The end of the prefabricated beam body is provided with a groove 4 for the in-situ concrete structure part to be embedded. The groove 4 is, for example, an arc-shaped groove. As an alternative embodiment, the in-situ concrete structure includes a main body 13 and two protruding parts 12 provided at the lower end of the main body 13 and protruding from the outer wall of the main body 13. The two protruding parts 12 are respectively embedded in the two grooves 4.

[0035] The in-situ concrete structure is arranged at the top of the column 6 and is connected to the top of the column 6. The outrigger skeleton is wrapped in the in-situ concrete structure. The first connection structure 1 is used to be connected to both the prefabricated beam body and the column 6 to realize the connection between the prefabricated beam body and the column 6.

[0036] The prefabricated beam body of the long-span prefabricated beam provided by the present invention is prefabricated in a factory, and only the connection positions of two adjacent prefabricated beam bodies and the connection position between the prefabricated beam body and the column 6 need to be poured on site. Compared with the overall in-situ casting of a long-span beam, the long-span prefabricated beam provided by the present invention has a shorter construction period and less human resources occupied.

[0037] In this embodiment, the prefabricated beam body includes an internal skeleton and a concrete layer wrapped outside the internal skeleton, and part of the internal skeleton extends out of the concrete layer to form an outrigger skeleton.

[0038] Further, as shown in Figure 2 , the cross-section of the precast beam along the direction perpendicular to its own length is in the shape of an I-beam. Further still, as shown in Figure 1 , the internal skeleton includes a positive T-shaped skeleton 2 and an inverted T-shaped skeleton 3 arranged in sequence along the height direction of the precast beam. One end of the positive T-shaped skeleton 2 extends out of the concrete layer to form an extended skeleton. The other end of the positive T-shaped skeleton 2 is connected to one end of the inverted T-shaped skeleton 3 close to the positive T-shaped skeleton 2, for example, by welding. Additionally, as an alternative implementation, both the positive T-shaped skeleton 2 and the inverted T-shaped skeleton 3 are made of T-shaped steel, for example.

[0039] When both ends of the precast beam need to be connected to other precast beams, the internal skeleton of the precast beam includes two positive T-shaped skeletons 2. At this time, the inverted T-shaped skeleton 3 is arranged below the two positive T-shaped skeletons 2 and between the two positive T-shaped skeletons 2. Both ends of the inverted T-shaped skeleton 3 are respectively connected to one end of the two positive T-shaped skeletons 2. The other ends of the two positive T-shaped skeletons 2 both extend out of the concrete layer and both form extended skeletons.

[0040] The force on the beam is basically tension at the lower part and compression at the upper part in the mid-span section, and the closer to the cross-section edge, the greater the tensile / compressive force. Therefore, as shown in Figure 1 and Figure 3 , in the embodiment of the present invention, an inverted T-shaped skeleton 3 is arranged at the lower part of the mid-span area of the long-span assembled beam provided by the shaft, and the upper part is positive T-shaped concrete, jointly forming an I-beam shape. While at the edge of the long-span assembled beam, the force is opposite, with tension at the upper part and compression at the lower part. Therefore, a positive T-shaped skeleton 2 is arranged at the upper part of the edge of the precast beam, and the lower part is inverted T-shaped concrete, jointly forming an I-beam shape. With such an arrangement, the long-span assembled beam provided by the embodiment of the present invention has reasonable force and high safety performance. And compared with the box beam, the long-span assembled beam provided by the embodiment of the present invention occupies less space, uses steel more reasonably, effectively saves materials, and is more convenient in transportation and installation, with more significant advantages.

[0041] Referring to Figures 1 - 4 , the embodiment of the present invention also provides an assembled beam-column structure, including: a long-span assembled beam, a column body 6, and a cast-in-place concrete structure 5.

[0042] Specifically, the number of long-span assembled beams is at least two, and all the precast beams are arranged in sequence. External extension skeletons for connecting the two are arranged at the opposite ends of any two adjacent precast beams.

[0043] Any two adjacent precast beam bodies correspond to one column body 6, and each precast beam body corresponds to a connecting structure. Therefore, one column body 6 corresponds to two first connecting structures 1, and each first connecting structure 1 is used to be connected to the column body 6 it corresponds to. The precast beam bodies and the cast-in-place concrete structure 5 are both supported on the column body 6 and are both connected to the column body 6.

[0044] A cast-in-place concrete structure 5 is arranged between any two adjacent precast beam bodies. The cast-in-place concrete structure 5 is used to wrap around the two outer extension skeletons where the adjacent two precast beam bodies are connected, and is used to be partially embedded in the two grooves 4 opposite to the adjacent two precast beam bodies. The cast-in-place concrete structures 5 correspond one by one to the column bodies 6. Each cast-in-place concrete structure 5 is used to be arranged on the column body 6 it corresponds to and is used to be connected to the column body 6 it corresponds to. The cast-in-place concrete structure 5 is made of concrete, for example, it is cast in place with ultra-high performance concrete. The connection between two adjacent precast beam bodies and between the precast beam body and the column body 6 is realized by cast-in-place concrete.

[0045] In this embodiment, as Figure 1 shown, the assembled beam-column structure further includes a second connecting structure 7. Two second connecting structures 7 are arranged on each column body 6, and the two second connecting structures 7 arranged on the same column body 6 are respectively used to be connected to the two first connecting structures 1 corresponding to the column body 6.

[0046] Furthermore, as Figures 1 - 4 shown, the assembled beam-column structure further includes an intermediate connecting piece 8. The first connecting structure 1 is a first T-shaped structure, and the two flange parts of the first T-shaped structure are both used to be connected to the precast beam body. The second connecting structure 7 is a second T-shaped structure, and the two flange parts of the second T-shaped structure are both used to be connected to the column body 6. The intermediate connecting piece 8 is used to connect the webs of the first T-shaped structure and the second T-shaped structure. The intermediate connecting piece 8 is, for example, an angle steel. The first T-shaped structure is, for example, made of T-shaped steel. The intermediate connecting piece 8 and the webs of the first T-shaped structure and the second T-shaped structure are, for example, connected by bolts. By arranging the intermediate connecting piece 8, the integrity of the whole structure can be increased and the shear resistance of the beam-column joint position can be strengthened.

[0047] In this embodiment, as Figures 1 - 4 shown, the assembled beam-column structure further includes a third connecting structure 9 and a fourth connecting structure 10. The third connecting structure 9 is used to be detachably connected to the two outer extension skeletons opposite to the adjacent two precast beam bodies, and the fourth connecting structure 10 is used to connect the cast-in-place concrete structure 5 and the column body 6.

[0048] As an optional implementation manner, as Figure 1As shown in the figure, the third connection structure 9 includes two steel plates, which are respectively arranged on the opposite sides of the precast beam body. Both ends of each steel plate are respectively connected to two adjacent precast beam bodies, for example, connected by bolts. Further, after both steel plates are connected to two adjacent precast beam bodies, sandblasting is performed at the connection positions to make the connection between the steel pipes and the precast beam body more firm.

[0049] As an alternative implementation, as Figures 2 - 4 shown in the figure, the fourth connection structure 10 is a third T-shaped structure. The third T-shaped structure is made of, for example, T-shaped steel. The web of the third T-shaped structure is embedded in the top of the column body 6 and cast together with the top of the column body 6. Both ends of the third T-shaped structure protrude from the outer side wall of the column top. Connecting pieces 11 are connected to the flange parts of the third T-shaped structure. The connecting pieces 11 are, for example, rivets. When casting the in-situ concrete structure 5 on-site, the connecting pieces 11 are cast together with the in-situ concrete structure 5 to realize the connection between the in-situ concrete structure 5 and the column top.

[0050] The specific construction steps of the assembled beam-column structure provided in this embodiment are as follows:

[0051] Fabricate the internal skeleton. According to the design drawings, determine the cross-sectional dimensions and lengths of the T-shaped steel required for the beam, select the corresponding T-shaped steel to serve as the positive T-shaped skeleton 2 and the inverted T-shaped skeleton 3, and connect one end of the positive T-shaped skeleton 2 to the end of the inverted T-shaped skeleton 3 close to the positive T-shaped skeleton 2;

[0052] Precast beam body. Pour concrete outside the fabricated internal skeleton to form a concrete layer. When pouring, pre-reserve a groove 4;

[0053] Connect two adjacent precast beam bodies. Connect the two opposite outer extension skeletons of two adjacent precast beam bodies through the third connection structure 9;

[0054] Connect the precast beam body to the column body 6. Connect both the second connection structure 7 and the fourth connection structure 10 to the column body 6, connect the connecting piece 11 to the fourth connection structure 10, and connect the first connection structure 1 and the second connection structure 7 through the intermediate connecting piece 8;

[0055] Form the in-situ concrete structure 5. Pour concrete between two precast beams. After the concrete sets, the in-situ concrete structure 5 can be formed. When pouring, use a support formwork to make the cross-section of the in-situ concrete structure 5 perpendicular to its own length direction be I-shaped.

[0056] The prefabricated beam-column structure provided in this embodiment can ensure the strength of the beam-column connection joint through the cooperation of the cast-in-place concrete structure 5, the first connection structure 1, the second connection structure 7, the third connection structure 9, the fourth connection structure 10, the intermediate connector 8, the connector 11, and the groove 4, so that the connection between two adjacent prefabricated beam bodies and between the prefabricated beam body and the column body 6 is firm.

[0057] In this specification, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A large-span prefabricated beam, characterized in that, For being arranged at the top end of a column body, including: A precast beam body, an outrigger skeleton for connecting with the end part of an adjacent precast beam body is arranged at the end part of the precast beam body, a groove for embedding a cast-in-place concrete structure part is arranged at the end part of the precast beam body, the cast-in-place concrete structure is used for being arranged at the top end of the column body and for connecting with the top end of the column body, and the outrigger skeleton is wrapped in the cast-in-place concrete structure; A first connection structure, the first connection structure is used for connecting with both the precast beam body and the column body; The precast beam body includes an internal skeleton and a concrete layer wrapped outside the internal skeleton, and a part of the internal skeleton extends out of the concrete layer to form the outrigger skeleton. The cross-section of the precast beam body along the direction perpendicular to its own length is in an I shape. The internal skeleton includes a positive T-shaped skeleton and an inverted T-shaped skeleton arranged in sequence along the height direction of the precast beam body. One end of the positive T-shaped skeleton extends out of the concrete layer to form the outrigger skeleton, and the other end of the positive T-shaped skeleton is connected with one end of the inverted T-shaped skeleton close to the positive T-shaped skeleton.

2. The long-span prefabricated beam according to claim 1, wherein The groove is an arc-shaped groove.

3. An assembled beam-column structure, characterized in that, Including: At least two large-span assembled beams as described in any one of claims 1-2, all the precast beam bodies are arranged in sequence, and the outrigger skeletons for connecting the two are arranged at the opposite two end parts of any two adjacent precast beam bodies; Column bodies, any two adjacent precast beam bodies correspond to one column body, one column body corresponds to two first connection structures, and each first connection structure is used for connecting with the column body it corresponds to; Cast-in-place concrete structures, cast-in-place concrete structures are arranged between any two adjacent precast beam bodies. The cast-in-place concrete structures are used for wrapping outside the two outrigger skeletons connected by the two adjacent precast beam bodies and for partially embedding in the two grooves opposite to the two adjacent precast beam bodies. The cast-in-place concrete structures correspond to the column bodies one by one, and each cast-in-place concrete structure is used for being arranged on its corresponding column body and for connecting with its corresponding column body.

4. The prefabricated beam-column structure according to claim 3, characterized in that, It further includes a second connection structure. Two second connection structures are arranged on each column body, and the two second connection structures arranged on the same column body are respectively used for connecting with the two first connection structures corresponding to the column body.

5. The prefabricated beam-column structure according to claim 4, characterized in that, It further includes an intermediate connector. The first connection structure is a first T-shaped structure, and both flange parts of the first T-shaped structure are used for connecting with the precast beam body. The second connection structure is a second T-shaped structure, and both flange parts of the second T-shaped structure are used for connecting with the column body. The intermediate connector is used for connecting the webs of the first T-shaped structure and the second T-shaped structure.

6. The prefabricated beam-column structure according to claim 5, characterized in that, It further includes a third connection structure and a fourth connection structure. The third connection structure is used for detachably connecting with the two outrigger skeletons opposite to two adjacent precast beam bodies, and the fourth connection structure is used for connecting the cast-in-place concrete structure and the column body.

7. The prefabricated beam-column structure according to claim 3, characterized in that, The cast-in-place concrete structure is cast on-site using ultra-high performance concrete.

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