Primary and secondary beam connection node structure of equivalent steel reinforced concrete structure system and construction method thereof

Abstract

The invention discloses a primary and secondary beam connection node structure of an equivalent steel reinforced concrete structure system and a construction method thereof, the primary and secondary beam connection node structure comprises a prefabricated main beam, the prefabricated main beam comprises a first framework and first concrete wrapping the lower part of the first framework, the first framework comprises a plurality of first longitudinal steel plates and a plurality of first stirrups hooped on the first longitudinal steel plates, and the first concrete is arranged on the lower part of the first framework; the middle parts of the first longitudinal steel plates are connected with joint profile steel; one end of the joint profile steel extends to the outer side of the prefabricated main beam; the prefabricated secondary beam comprises a second framework and second concrete wrapping the lower portion of the second framework, the second framework comprises a plurality of second longitudinal steel plates and a plurality of second stirrups hooped on the second longitudinal steel plates, and connector steel plates are embedded in the second concrete at the two opposite ends of the prefabricated secondary beam; the second longitudinal steel plate and the joint steel plate are connected to one end of the joint profile steel; and the third concrete is post-poured on the prefabricated main beam and the prefabricated secondary beam, and the third concrete covers the upper parts of the first framework and the second framework and the joint profile steel. The problems that an existing main beam and secondary beam connecting joint of an assembly type concrete structure is complex in connection and large in construction difficulty are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a primary and secondary beam connection node structure of an equivalent steel-framed concrete structural system and a construction method thereof. Background Art

[0002] Prefabricated concrete structure technology is a technology that prefabricates concrete components in factories and then transports them to construction sites for assembly. This technology has the advantages of high production efficiency, fast construction speed, and controllable quality, so it has been widely used in modern construction.

[0003] At present, the connection method of the main and secondary beam nodes of prefabricated concrete structures is usually achieved by tying, welding or mechanical connection of steel bars. However, this method has some limitations, such as complex connection, difficult construction, and easy to produce quality problems. Especially when natural disasters such as earthquakes occur, the node connection often becomes the weak link of the structure and is easily damaged. Summary of the invention

[0004] In order to overcome the defects of the prior art, an equivalent steel-framed concrete structural system primary and secondary beam connection node structure and a construction method thereof are provided to solve the problems of complex connection and difficult construction of primary and secondary beam connection nodes in existing prefabricated concrete structures.

[0005] In order to achieve the above object, a primary and secondary beam connection node structure of an equivalent steel-reinforced concrete structural system is provided, comprising:

[0006] A prefabricated main beam, comprising a first frame and first concrete covering a lower portion of the first frame, wherein the first frame comprises a plurality of first longitudinal steel plates and a plurality of first stirrups arranged on the plurality of first longitudinal steel plates, wherein a joint steel is connected to the middle portions of the plurality of first longitudinal steel plates, and one end of the joint steel extends to the outer side of the prefabricated main beam;

[0007] A precast secondary beam, comprising a second frame and second concrete covering a lower portion of the second frame, wherein the second frame comprises a plurality of second longitudinal steel plates and a plurality of second stirrups hooped around the plurality of second longitudinal steel plates, joint steel plates are embedded in the second concrete at opposite ends of the precast secondary beam, and the second longitudinal steel plate and the joint steel plate are connected to one end of the joint steel;

[0008] The third concrete is later poured on the precast main beam and the precast secondary beam, and the third concrete covers the upper part of the first frame, the second frame and the joint steel.

[0009] Furthermore, the end portions of the second longitudinal steel plate and the end portions of the joint steel plate respectively extend to the outside of the end surface of the prefabricated secondary beam, and the third concrete covers the end portions of the second longitudinal steel plate and the end portions of the joint steel plate.

[0010] Furthermore, the joint steel is an I-shaped steel.

[0011] Furthermore, the second longitudinal steel plate on the upper layer of the second skeleton is connected to the upper flange of the I-beam, the second longitudinal steel plate on the lower side of the second skeleton is connected to the lower flange of the I-beam, and the end of the joint steel plate is connected to the web of the I-beam.

[0012] Furthermore, the end of the joint steel plate is connected to the web of the I-beam through a connecting steel plate.

[0013] The present invention provides a construction method for a primary and secondary beam connection node structure of an equivalent steel-framed concrete structural system, comprising the following steps:

[0014] Hoisting prefabricated main beams;

[0015] Hoisting the prefabricated secondary beam to the joint steel of the prefabricated main beam;

[0016] Connecting the second longitudinal steel plate and the joint steel plate of the prefabricated secondary beam to one end of the joint steel;

[0017] The third concrete is then poured onto the precast main beam and the precast secondary beam, so that the third concrete covers the upper portion of the first frame, the second frame and the joint steel to consolidate and form an equivalent steel-concrete structural system main and secondary beam connection node structure.

[0018] The beneficial effect of the present invention is that the connection node structure of the primary and secondary beams of the equivalent steel-framed concrete structural system of the present invention uses longitudinal steel plates equivalently (equal strength and equal area) to replace the longitudinal force-bearing steel bars in the traditional precast concrete primary and secondary beam components in the precast concrete primary and secondary beam components, and the joint steel is embedded in the precast concrete primary beam component along the axis direction of the secondary beam, and a section of extended joint steel plate is embedded in the secondary beam component. At the construction site, the web of the joint steel of the main beam and the extended joint steel plate of the secondary beam are bolted together, and then the upper flange and lower flange of the embedded joint steel are welded to the longitudinal steel plate of the secondary beam to connect the precast concrete beam components into a structural system.

[0019] The primary and secondary beam connection node structure of the equivalent steel-framed concrete structural system of the present invention introduces the longitudinal steel plate in the beam as its main load-bearing member and combines it with concrete to form a composite structure, thereby achieving optimization and innovation of the node connection, reducing the connection complexity and construction difficulty of the primary and secondary beams, and providing a more reliable, efficient and environmentally friendly structural solution for modern buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 It is a structural schematic diagram of the primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to an embodiment of the present invention.

[0022] Figure 2 It is a top view of the primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to an embodiment of the present invention.

[0023] Figure 3 It is a structural schematic diagram of a single-sided secondary beam of a primary-secondary beam connection node structure of an equivalent steel-reinforced concrete structural system according to an embodiment of the present invention.

[0024] Figure 4 It is a top view of a single-sided secondary beam of a primary-secondary beam connection node structure of an equivalent steel-framed concrete structural system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Reference Figures 1 to 4 As shown, the present invention provides a main-secondary beam connection node structure of an equivalent steel-framed concrete structural system, comprising: a prefabricated main beam 1, a prefabricated secondary beam 2, and a third concrete 3.

[0028] The prefabricated main beam 1 includes a first skeleton and a first concrete 12 .

[0029] Specifically, the first skeleton includes a plurality of first longitudinal steel plates 111 and a plurality of first stirrups 112. The plurality of first stirrups 112 are disposed outside the plurality of first longitudinal steel plates.

[0030] A joint steel 113 is connected to the middle of the plurality of first longitudinal steel plates 111. One end of the joint steel 113 extends to the outside of the prefabricated main beam 1.

[0031] The first concrete 12 is coated on the first concrete 12 at the lower part of the first frame. In this embodiment, the first frame includes multiple layers of first longitudinal steel plates. The first frame includes at least an upper first longitudinal steel plate and a lower first longitudinal steel plate. The first concrete is coated on the lower first longitudinal steel plate, so that the second longitudinal steel plate is exposed outside the first concrete.

[0032] The precast secondary beam 2 includes a second skeleton and a second concrete 22 .

[0033] Specifically, the second skeleton includes a plurality of second longitudinal steel plates 211 and a plurality of second stirrups 212. The plurality of second stirrups 212 are arranged outside the plurality of second longitudinal steel plates. Joint steel plates 213 are embedded in the second concrete 22 at opposite ends of the precast secondary beam 2. The second longitudinal steel plate 211 and the joint steel plate 213 are connected to one end of the joint steel 113.

[0034] The second concrete 22 is coated on the lower part of the second frame. In this embodiment, the second frame includes multiple layers of second longitudinal steel plates. The second frame includes at least an upper second longitudinal steel plate and a lower second longitudinal steel plate. The second concrete is coated on the lower second longitudinal steel plate, so that the second longitudinal steel plate is exposed outside the second concrete.

[0035] The third concrete 3 is poured on the precast main beam 1 and the precast secondary beam 2. The third concrete 3 covers the upper part of the first frame, the second frame and the joint steel 113.

[0036] Specifically, the third concrete is coated on the upper first longitudinal steel plate and the upper second longitudinal steel plate.

[0037] The ends of the second longitudinal steel plate 211 and the ends of the joint steel plate 213 extend to the outside of the end surface of the precast secondary beam 2. The third concrete 3 covers the ends of the second longitudinal steel plate 211 and the ends of the joint steel plate 213.

[0038] As a preferred implementation, the joint steel 113 is an I-shaped steel.

[0039] Specifically, the joint steel of the I-beam includes an upper flange, a lower flange and a web. The web is connected between the upper flange and the lower flange. The joint steel is arranged along the width direction of the prefabricated main beam. The length of the joint steel is greater than the width of the prefabricated main beam. When the two sides of the prefabricated main beam are respectively connected to the prefabricated secondary beams, the two ends of the joint steel extend to the outside of the prefabricated main beam (such as Figure 1 or, when one side of the precast main beam is connected to the precast secondary beam, one end of the joint steel extends to the outside of the precast main beam (as shown in Figure 2 shown).

[0040] The second longitudinal steel plate 211 of the upper layer of the second frame is connected to the upper flange of the I-shaped steel. The second longitudinal steel plate 211 of the lower side of the second frame is connected to the lower flange of the I-shaped steel. The end of the joint steel plate 213 is connected to the web of the I-shaped steel.

[0041] The end of the joint steel plate 213 is connected to the web of the I-beam through a connecting steel plate.

[0042] The second longitudinal steel plate 211 of the upper layer of the second frame is connected to the upper flange of the I-shaped steel by full penetration welding. The second longitudinal steel plate 211 of the lower side of the second frame is connected to the lower flange of the I-shaped steel by full penetration welding. The first longitudinal steel plate of the first frame is connected to the joint steel by full penetration welding.

[0043] The present invention provides a construction method for a primary and secondary beam connection node structure of an equivalent steel-framed concrete structural system, comprising the following steps:

[0044] S1. Hoisting prefabricated main beam 1.

[0045] S2. Hoist the prefabricated secondary beam 2 to the joint steel 113 of the prefabricated main beam 1.

[0046] S3, connecting the second longitudinal steel plate 211 and the joint steel plate 213 of the prefabricated secondary beam 2 to one end of the joint steel 113.

[0047] S4, pour the third concrete 3 on the precast main beam 1 and the precast secondary beam 2, so that the third concrete 3 covers the upper part of the first frame, the second frame and the joint steel 113 to consolidate and form an equivalent steel-concrete structural system main and secondary beam connection node structure.

[0048] The equivalent steel-framed concrete structural system main and secondary beam connection node structure of the present invention adopts longitudinal steel plates (equal strength and equal area) to replace the longitudinal stress-bearing steel bars in the traditional precast concrete main and secondary beam components in the precast concrete main and secondary beam components, embeds joint steel in the precast concrete main beam component along the axis direction of the secondary beam, and embeds a section of extended joint steel plate in the secondary beam component. At the construction site, the web of the joint steel of the main beam and the extended joint steel plate of the secondary beam are bolted together, and then the upper flange and lower flange of the embedded joint steel are welded to the longitudinal steel plate of the secondary beam to connect the precast concrete beam components into a structural system.

[0049] The primary and secondary beam connection node structure of the equivalent steel-framed concrete structural system of the present invention introduces the longitudinal steel plate in the beam as its main load-bearing member and combines it with concrete to form a composite structure, thereby achieving optimization and innovation of the node connection, reducing the connection complexity and construction difficulty of the primary and secondary beams, and providing a more reliable, efficient and environmentally friendly structural solution for modern buildings.

[0050] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A primary and secondary beam connection node structure of an equivalent steel-reinforced concrete structural system, characterized in that: include: A prefabricated main beam, comprising a first frame and first concrete covering a lower portion of the first frame, wherein the first frame comprises a plurality of first longitudinal steel plates and a plurality of first stirrups arranged on the plurality of first longitudinal steel plates, wherein a joint steel is connected to the middle portions of the plurality of first longitudinal steel plates, and one end of the joint steel extends to the outer side of the prefabricated main beam; A precast secondary beam, comprising a second frame and second concrete covering a lower portion of the second frame, wherein the second frame comprises a plurality of second longitudinal steel plates and a plurality of second stirrups hooped around the plurality of second longitudinal steel plates, joint steel plates are embedded in the second concrete at opposite ends of the precast secondary beam, and the second longitudinal steel plate and the joint steel plate are connected to one end of the joint steel; The third concrete is later poured on the precast main beam and the precast secondary beam, and the third concrete covers the upper part of the first frame, the second frame and the joint steel.

2. The primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to claim 1 is characterized in that: The ends of the second longitudinal steel plate and the ends of the joint steel plate extend to the outside of the end surface of the prefabricated secondary beam respectively, and the third concrete covers the ends of the second longitudinal steel plate and the ends of the joint steel plate.

3. The primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to claim 1 is characterized in that: The joint steel is an I-shaped steel.

4. The primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to claim 3 is characterized in that: The second longitudinal steel plate on the upper layer of the second frame is connected to the upper flange of the I-shaped steel, the second longitudinal steel plate on the lower side of the second frame is connected to the lower flange of the I-shaped steel, and the end of the joint steel plate is connected to the web of the I-shaped steel.

5. The primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system according to claim 4 is characterized in that: The end of the joint steel plate is connected to the web of the I-shaped steel through a connecting steel plate.

6. A construction method for the primary and secondary beam connection node structure of the equivalent steel-reinforced concrete structural system as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Hoisting prefabricated main beams; Hoisting the prefabricated secondary beam to the joint steel of the prefabricated main beam; Connecting the second longitudinal steel plate and the joint steel plate of the prefabricated secondary beam to one end of the joint steel; The third concrete is then poured onto the precast main beam and the precast secondary beam, so that the third concrete covers the upper portion of the first frame, the second frame and the joint steel to consolidate and form an equivalent steel-concrete structural system main and secondary beam connection node structure.

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