A rigid connection node structure of precast concrete primary and secondary beams

Abstract

The present invention relates to a rigid connection node structure of precast concrete primary and secondary beams, comprising a precast concrete primary beam and a precast concrete secondary beam, on which a connection plate 4 for installation with the precast concrete secondary beam is reserved, the connection plate comprising a vertically arranged web and a horizontally arranged flange, the web and the flange being arranged integrally, the web being located in the middle of the flange, the web being arranged perpendicular to the flange, the longitudinal cross-section in the middle of the connection plate being an inverted T-shaped structure, the middle of the connection plate being embedded in the precast concrete primary beam, the left and right ends of the connection plate extending to the outside of the precast concrete primary beam for connection with the precast concrete secondary beam, a U-shaped embedded plate being reserved at the bottom of the precast concrete secondary beam near the end of the precast concrete primary beam, the embedded plate being overlapped on the flange for fixation. Compared with the traditional shelving node, the rigid connection node structure created by the present invention does not weaken the precast concrete primary beam by a notch, thereby ensuring the integrity of the precast primary beam.

Description

Technical Field

[0001] The invention belongs to the technical field of precast concrete primary and secondary beam connections, and relates to a rigid connection node structure of precast concrete primary and secondary beams. Background Art

[0002] With the continuous development of urbanization in my country and the continuous promotion of energy-saving and environmental protection projects, more and more prefabricated and assembled structures are emerging. However, existing prefabricated and assembled primary and secondary beam connection nodes have defects such as poor integrity and weak shear resistance, which have a negative impact on the safety and stability of the overall structure. Therefore, finding the simplest possible method for connecting precast concrete primary and secondary beam nodes while ensuring structural safety is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a rigid connection node structure of precast concrete primary and secondary beams that can solve the above-mentioned problems.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A rigid connection node structure of precast concrete primary and secondary beams includes a precast concrete primary beam and a precast concrete secondary beam, on which a connection plate 4 for installation with the precast concrete secondary beam is reserved, the connection plate includes a vertically arranged web and a horizontally arranged flange, the web and the flange are arranged as one body, the web is located in the middle of the flange, the web and the flange are arranged perpendicularly, the longitudinal cross-section in the middle of the connection plate is an inverted T-shaped structure, the middle of the connection plate is embedded in the precast concrete primary beam, the left and right ends of the connection plate extend to the outside of the precast concrete primary beam for connection with the precast concrete secondary beam, a U-shaped embedded plate is reserved at the bottom of the precast concrete secondary beam near the end of the precast concrete primary beam, the U-shaped opening of the embedded plate corresponds to the through slot on the precast concrete secondary beam, and the embedded plate is overlapped on the flange for fixation.

[0006] Furthermore, the three-sided connection between the embedded plate and the flange is fixed by welding.

[0007] Furthermore, the flange length of the connecting plate exceeds the through-notch of the precast concrete secondary beam but does not exceed the embedded plate.

[0008] Furthermore, a gap is left between the precast concrete secondary beam and the precast concrete main beam.

[0009] Furthermore, the opposite side walls of the precast concrete main beam and the precast concrete secondary beam are respectively configured as rough surfaces, and the top ends of the precast concrete main beam and the precast concrete secondary beam are also respectively configured as rough surfaces.

[0010] Furthermore, a post-cast composite layer structure is formed between the precast concrete main beam and the precast concrete secondary beam, and at the upper ends of the precast concrete main beam and the precast concrete secondary beam.

[0011] Furthermore, the upper longitudinal reinforcement of the precast concrete secondary beam of the precast concrete secondary beam passes through the precast concrete main beam.

[0012] Furthermore, the lower longitudinal reinforcement of the precast concrete secondary beam of the precast concrete secondary beam is welded to the embedded plate.

[0013] Furthermore, circular holes are respectively opened on the web inside the precast concrete main beam near the edges on the left and right sides of the precast concrete main beam for the waist reinforcement of the precast concrete main beam to pass through.

[0014] Furthermore, bolts for enhancing the shear bearing capacity of the connection plate are fixed on the web inside the precast concrete main beam.

[0015] The beneficial effects of the present invention are:

[0016] 1. Compared with the traditional shelving node, the rigid connection node structure of the present invention has no notch weakening of the precast concrete main beam, thereby ensuring the integrity of the precast main beam.

[0017] 2. Compared with the traditional shelving node, the rigid connection node structure of the present invention is that the prefabricated secondary beam is entirely shelved on the flange of the connection plate of the prefabricated main beam, which makes the connection more stable and less prone to dislocation and torsion.

[0018] 3. While ensuring the construction quality, it effectively reduces the construction difficulty and shortens the construction period, which meets the requirements of the era of low-carbon society and green building for project management.

[0019] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the rigid connection node created by the present invention;

[0022] Figure 2 for Figure 1 AA section view in the figure;

[0023] Figure 3 for Figure 1 BB cross-sectional view in;

[0024] Figure 4 This is a connection diagram of the connecting plate and the embedded plate.

[0025] Reference numerals:

[0026] 1. Precast concrete main beam; 2. Precast concrete secondary beam; 3. Post-cast superimposed layer; 4. Connecting plate; 41. Web plate; 42. Flange; 5. Studs; 6. Embedded plate; 7. Precast concrete main beam longitudinal reinforcement; 8. Precast concrete main beam stirrups; 9. Precast concrete main beam waist reinforcement; 10. Precast concrete secondary beam upper longitudinal reinforcement; 11. Precast concrete secondary beam stirrups; 12. Precast concrete secondary beam lower longitudinal reinforcement. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figures 1 to 4, is a rigid connection node structure of precast concrete main and secondary beams, comprising a precast concrete main beam 1 and a precast concrete secondary beam 2. The precast concrete main beam 1 is precast in a factory or on site, and a connection plate 4 is reserved thereon for installation with the precast concrete secondary beam 2. The connection plate 4 comprises a vertically arranged web 41 and a horizontally arranged flange 42. The web 41 and the flange 42 are integrally arranged, the web 41 is located in the middle of the flange 42, the web 41 and the flange 42 are arranged perpendicularly, and the longitudinal cross-section in the middle of the connection plate 4 is an inverted T-shaped structure. The middle of the connection plate 4 is embedded in the precast concrete main beam 1, and the left and right ends of the connection plate 4 extend to the outside of the precast concrete main beam 1 for connection with the precast concrete secondary beam 2. The two ends of the connection plate 4 extending outward are symmetrical to each other.

[0031] An embedded plate 6 is pre-embedded at the bottom of the precast concrete secondary beam 2, near the end of the precast concrete primary beam 1. This plate 6 is a single piece of U-shaped steel plate. The U-shaped opening of the plate 6 corresponds to the through-notch in the precast concrete secondary beam 2, which is roughened. During assembly, the web 41 is positioned within the through-notch in the precast concrete secondary beam 2 and the U-shaped opening of the embedded plate 6. A gap is left between the precast concrete secondary beam 2 and the precast concrete primary beam 1.

[0032] The embedded plate 6 is overlapped on the flange 42. The embedded plate 6 is connected to the flange 42 on three sides with fillet welds, effectively connecting the lower portion of the precast concrete secondary beam 2. The upper longitudinal reinforcement 10 of the precast concrete secondary beam 2 extends through the precast concrete main beam 1. The lower longitudinal reinforcement 12 of the precast concrete secondary beam 2 is welded to the embedded plate 6. The weld length and strength meet regulatory requirements, ensuring the stability of the embedded plate 6.

[0033] The web 41 of the connecting plate 4 is provided with circular holes at the edges of the left and right sides of the precast concrete main beam 1 for the precast concrete main beam waist reinforcement 9 to pass through. Studs 5 are welded on the web 41 inside the precast concrete main beam 1 to enhance the shear bearing capacity of the connecting plate 4.

[0034] The length of the flange 42 of the connecting plate 4 exceeds the through-notch of the precast concrete secondary beam 2 but does not exceed the embedded plate 6, so as to achieve the effect of eliminating the need for a bottom formwork in the later pouring.

[0035] The opposite side walls of the precast concrete main beam 1 and the precast concrete secondary beam 2 are both provided with rough surfaces, and the top ends of the precast concrete main beam 1 and the precast concrete secondary beam 2 are also respectively provided with rough surfaces.

[0036] The precast concrete secondary beam stirrups 11 are welded and fixed at the connection points with the precast concrete secondary beam upper longitudinal reinforcement 10 and the precast concrete secondary beam lower longitudinal reinforcement 12 .

[0037] Precast concrete main beam longitudinal reinforcement 7 and precast concrete main beam stirrups 8 are also provided in the precast concrete main beam 1 according to needs.

[0038] The precast concrete secondary beam 2 has good horizontal and lateral constraints, and can be exempted from the support below. The precast concrete secondary beam 2 can be used as a support for the composite slab and other precast floor slabs.

[0039] The construction process created by the present invention:

[0040] 1) Precast concrete main beam 1 and precast concrete secondary beam 2 are prefabricated according to the node requirements, and embedded slabs are pre-embedded;

[0041] 2) Installing the precast concrete main beam 1 on site and adjusting the position of the precast concrete main beam 1;

[0042] 3) Precast concrete secondary beam 2 on site and adjust the position of precast concrete secondary beam 2;

[0043] 4) The embedded plate 6 below the precast concrete secondary beam 2 is connected to the flange 42 of the connection plate 4 reserved for the precast concrete main beam 1 by fillet welding on three sides;

[0044] 5) Tie beam reinforcement and lay floor slabs;

[0045] 6) Pour concrete.

[0046] After the precast concrete secondary beam 2 is placed on the connecting plate 4 of the precast concrete main beam 1, the connecting plate 4 and the embedded plate 6 are welded on three sides. After the precast concrete secondary beam 2 is placed on the connecting plate 4 of the precast concrete main beam 1, a certain height gap exists between the precast concrete main beam 1 and the precast concrete secondary beam 2. The top and the gap of the precast concrete main beam 1 and the precast concrete secondary beam 2 are finally cast as a whole with fine stone concrete, and then the overlapping layer 3 is cast after completion. The concrete used for casting requires a 14-day limit expansion rate ≥ 0.030%.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A rigid connection node structure of precast concrete primary and secondary beams, characterized by: The invention comprises a precast concrete main beam (1) and a precast concrete secondary beam (2), on which a connection plate (4) for installation with the precast concrete secondary beam (2) is reserved, the connection plate (4) comprising a vertically arranged web (41) and a horizontally arranged flange (42), the web (41) and the flange (42) being arranged as a whole, the web (41) being located in the middle of the flange (42), the web (41) and the flange (42) being arranged vertically, the longitudinal section in the middle of the connection plate (4) being an inverted T-shaped structure, The middle portion of the connecting plate (4) is embedded in the precast concrete main beam (1), and the left and right ends of the connecting plate (4) extend to the outside of the precast concrete main beam (1) for connection with the precast concrete secondary beam (2). A U-shaped embedded plate (6) is reserved at the bottom of the precast concrete secondary beam (2) near the end of the precast concrete main beam (1). The U-shaped opening of the embedded plate (6) corresponds to the through-notch on the precast concrete secondary beam (2), and the embedded plate (6) is overlapped on the flange (42) for fixation.

2. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: The three-sided connection between the embedded plate (6) and the flange (42) is fixed by welding.

3. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: The length of the flange (42) of the connecting plate (4) exceeds the through slot of the precast concrete secondary beam (2) but does not exceed the embedded plate (6).

4. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: A gap is left between the precast concrete secondary beam (2) and the precast concrete main beam (1).

5. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: The opposite side walls of the precast concrete main beam (1) and the precast concrete secondary beam (2) are respectively set to be rough surfaces, and the top ends of the precast concrete main beam (1) and the precast concrete secondary beam (2) are also respectively set to be rough surfaces.

6. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: Between the precast concrete main beam (1) and the precast concrete secondary beam (2), and at the upper ends of the precast concrete main beam (1) and the precast concrete secondary beam (2) are post-cast superimposed layer (3) structures.

7. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: The upper longitudinal reinforcement (10) of the precast concrete secondary beam (2) passes through the precast concrete main beam (1).

8. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: The lower longitudinal reinforcement (12) of the precast concrete secondary beam (2) is welded to the embedded plate (6).

9. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: Circular holes are respectively opened on the web (41) inside the precast concrete main beam (1) near the edges of the left and right sides of the precast concrete main beam (1) for the precast concrete main beam waist reinforcement (9) to pass through.

10. The rigid connection node structure of precast concrete primary and secondary beams according to claim 1, characterized in that: Bolts (5) for enhancing the shear bearing capacity of the connecting plate (4) are fixed on the web (41) inside the precast concrete main beam (1).

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