A new type of connecting joint of main and secondary beams

Abstract

The utility model relates to the field of building, concretely relates to a new type connecting joint of main beam and secondary beam. Including prefabricated main frame beam, prefabricated secondary beam, steel hanger; the side surface of main frame beam is connected with first steel buried part, and the beam end bottom surface of prefabricated secondary beam is connected with second steel buried part, first steel buried part and second steel buried part are connected through steel hanger, and the top of prefabricated main frame beam and prefabricated secondary beam is equipped with the superimposed layer, the utility model belongs to the semi-rigid connecting joint, has certain joint stiffness and the ability of adapting node deformation, and the construction is simple, need not to set up temporary support and post-pouring band, can according to the size of load flexible adjustment steel hanger and steel buried part size, and the scope of application is wide.

Description

Technical Field

[0001] This utility model relates to the field of construction, specifically to a novel connection node for primary and secondary beams. Background Technology

[0002] The connection nodes between primary and secondary beams are critical components for structural force transmission, bearing the important responsibility of transferring shear force, bending moment, and axial force. A well-designed node ensures effective load transfer and prevents localized structural damage or even overall collapse due to node failure. Primary and secondary beam connection nodes include hinged and rigid connections. Hinged connections often employ a bracing system, while rigid connections often use pre-cast strips. However, these methods have the following main drawbacks:

[0003] (1) The load transfer of the ox-staff connection mainly relies on friction and the shear resistance of the ox-staff itself. Its shear resistance is relatively low. For the connection of the main and secondary beams that bear large shear forces, additional reinforcement measures may be required.

[0004] (2) The joint stiffness of the ox-handle plate connection is small, which may cause the structure to undergo large deformation under earthquake or other dynamic loads, affecting the overall stability and seismic performance of the structure.

[0005] (3) Rigid connections require the reservation of post-cast strips at the main beam location, which is inconvenient for the production of precast components;

[0006] (4) When reserving the post-pouring strip connection, temporary support needs to be added and a certain curing time is required. The construction is more complicated and the construction period is longer. Utility Model Content

[0007] Based on the aforementioned technical problems, a novel connection node for primary and secondary beams has been developed:

[0008] A novel connection node for main and secondary beams includes a precast main frame beam, a precast secondary beam, and a steel bracket; a first steel embedded part is connected to the side of the main frame beam, and a second steel embedded part is connected to the bottom surface of the beam end of the precast secondary beam; the first steel embedded part and the second steel embedded part are connected by the steel bracket; a composite layer is provided on the top of the precast main frame beam and the precast secondary beam.

[0009] Preferably, the first steel embedded parts are arranged in pairs on both sides of the precast main frame beam, and the two corresponding first steel embedded parts are connected by a connecting rod.

[0010] Preferably, the connecting rod is an anchor bar or an angle steel.

[0011] Preferably, in the precast main frame beam, at the connection with the first steel embedded part, reinforcing stirrups and / or hanging bars are also provided.

[0012] Preferably, the steel bracket includes a flange and two webs, which form a "π" shaped structure.

[0013] Preferably, the second steel embedded part is the same width as the precast secondary beam.

[0014] Preferably, the connection between the precast main beam and the precast secondary beam is sealed with high-strength grout.

[0015] Beneficial effects:

[0016] 1) It belongs to a semi-rigid connection node, which has a certain degree of node stiffness and the ability to adapt to node deformation;

[0017] 2) Construction is simple, requiring no temporary supports or post-pouring strips;

[0018] 3) The dimensions of the steel brackets and steel embedded parts can be flexibly adjusted according to the load size, making it applicable to a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the plan layout of precast beams and columns;

[0020] Figure 2 Elevation view of the connection node between the main and secondary beams;

[0021] Figure 3 Elevation view of the node connecting the main and secondary beams (equal height on the left and right);

[0022] Figure 4 Elevation view of the node connecting the main and secondary beams (with unequal heights on the left and right);

[0023] Figure 5 Drawings of additional stirrups and hangers installed at the first steel embedded part for the precast main frame beam;

[0024] Figure 6 Two views of the first steel embedded part connected by anchor bars;

[0025] Figure 7 Two views of the first embedded steel component connected by angle steel;

[0026] Figure 8 This is a structural diagram of the second steel embedded part;

[0027] Figure 9 Two views of the steel bracket structure;

[0028] Attached reference numerals: 1-Precast main frame beam, 11-First steel embedded part, 111-Anchor bar, 112-Angle steel, 12-Reinforcing stirrup, 13-Hanging bar;

[0029] 2-Precast secondary beam, 21-Second steel embedded part;

[0030] 3-Steel bracket, 31-Flange, 32-Span;

[0031] 4-Precast secondary frame beam, 5-Precast frame column, 6-Composite layer. Detailed Implementation

[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] like Figures 1 to 9 As shown, a novel connection node for main and secondary beams is disclosed. The connection node includes a main-secondary beam connection edge node or a main-secondary beam connection middle node; it includes a precast main frame beam 1, a precast secondary beam 2, and a steel bracket 3; a first steel embedded part 11 is connected to the side of the main frame beam 1, and a second steel embedded part 21 is connected to the bottom surface of the beam end of the precast secondary beam 2; the first steel embedded part 11 and the second steel embedded part 21 are connected by the steel bracket 3; a composite layer 6 is provided on the top of the precast main frame beam 1 and the precast secondary beam 2; in this embodiment, the second steel embedded part 21 is the same width as the precast secondary beam 2.

[0034] In a preferred embodiment, the first steel embedded parts 11 are arranged in pairs on both sides of the precast main frame beam 1, and the two corresponding first steel embedded parts 11 are connected by a connecting rod. The connecting rod ensures that the steel embedded parts 11 are reliably anchored in the precast main beam. The form of the connecting rod can be set as needed. When the force is small, the connecting rod can be an anchor bar 111; when the force is large, the connecting rod can be an angle steel 112. In a further embodiment, at the connection between the precast main frame beam 1 and the first steel embedded part 11, reinforcing stirrups 12 and / or hanging bars 13 are also provided.

[0035] In a preferred embodiment, the steel bracket 3 includes a flange 31 and two web plates 32. The flange 31 and the two web plates 32 form a "π"-shaped structure. By utilizing the double web plates for shear resistance, it has better load-bearing capacity and torsional resistance compared with the single web plate shear resistance of the traditional bracket.

[0036] To better illustrate the structure of this utility model, Figure 1 The document also marks 4 precast secondary frame beams and 5 precast frame columns.

[0037] The construction method is as follows:

[0038] 1) The first steel embedded part 11 is connected to the steel bracket 3 by welding;

[0039] 2) Hoisting and installing precast main frame beam 1;

[0040] 3) Hoisting and installing precast secondary beam 2;

[0041] 4) Weld the steel bracket 3 to the second steel embedded part 21;

[0042] 5) The gap between the precast main frame beam 1 and the precast secondary beam 2 is sealed with high-strength grout;

[0043] 6) Cast an integral composite layer 6 on top of the main frame beam 1 and the precast secondary beam 2.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel connection node between primary and secondary beams, characterized in that, It includes a precast main frame beam, a precast secondary beam, and a steel bracket; a first steel embedded part is connected to the side of the main frame beam, and a second steel embedded part is connected to the bottom surface of the beam end of the precast secondary beam; the first steel embedded part and the second steel embedded part are connected by the steel bracket; a composite layer is provided on the top of the precast main frame beam and the precast secondary beam.

2. The novel connection node between primary and secondary beams according to claim 1, characterized in that, The first steel embedded parts are installed in pairs on both sides of the precast main frame beam, and the two corresponding first steel embedded parts are connected by connecting rods.

3. The novel connection node between primary and secondary beams according to claim 2, characterized in that, The connecting rod is constructed of anchor bars or angle steel.

4. The novel connection node between primary and secondary beams according to claim 1, characterized in that, In the precast main frame beam, at the connection with the first steel embedded part, there are also reinforcing stirrups and / or hanging bars.

5. A novel connection node for primary and secondary beams according to claim 1, characterized in that, The steel bracket includes a flange and two webs, which together form a "π" shaped structure.

6. A novel connection node for primary and secondary beams according to claim 1, characterized in that, The second steel embedded part is the same width as the precast secondary beam.

7. A novel connection node for primary and secondary beams according to claim 1, characterized in that, The joints between the precast main frame beams and the precast secondary beams are sealed with high-strength grout.

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