Connecting joint for concrete modular shear wall

Abstract

The utility model discloses a connecting node for a concrete modularized shear wall, the connecting node is used for connecting two groups of concrete module prefabricated walls which are arranged at intervals, and each group of concrete module prefabricated walls comprises a vertical load-bearing steel bar, a horizontal load-bearing steel bar, an annular stirrup and a reserved connecting hole, the vertical load-bearing steel bars are used for bearing the bending moment borne by the shear wall, the horizontal load-bearing steel bars are used for bearing the shear force borne by the shear wall, and the two sets of annular stirrups are in lap joint with each other. The vertical load-bearing steel bars and the horizontal load-bearing steel bars are arranged in the concrete prefabricated wall, so that bending moment and shearing force borne by the shear wall are borne, and the shear wall is more stable; and secondly, by arranging the annular stirrups, the two sets of concrete module prefabricated walls are preliminarily positioned through lap joint of the annular stirrups, and therefore connection of the two sets of concrete module prefabricated walls is easier and more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of assembled buildings, and in particular relates to a connection node for a concrete modular shear wall. Background Art

[0002] Modular buildings are standardized space building modules that integrate architectural, structural, electromechanical and decoration functions, are prefabricated in factories, and meet the requirements of transportation, hoisting, testing and maintenance. They are currently the most assembled and industrialized building industrial products. At present, modular buildings usually use steel structure modular buildings and concrete modular buildings. Compared with steel structure modular buildings, concrete modular buildings are usually more economical, but concrete modular buildings also have problems such as thickened wall panels, reduced actual usable space, difficult on-site steel bar binding, and inconvenient structural connections. Utility Model Content

[0003] The utility model provides a connection node for a concrete modular shear wall, which can effectively solve the above problems.

[0004] The utility model is achieved in this way:

[0005] A connection node for a concrete modular shear wall, the connection node is used to connect two groups of concrete module prefabricated walls arranged at intervals, the two groups of concrete module prefabricated walls both include vertical stress-bearing steel bars, horizontal stress-bearing steel bars, annular stirrups and reserved connection holes, the vertical stress-bearing steel bars are used to bear the bending moment borne by the shear wall, the horizontal stress-bearing steel bars are used to bear the shear force borne by the shear wall, the two groups of annular stirrups overlap each other, and the reserved connection holes realize the positioning and fixation of the two groups of concrete module prefabricated walls through screw connectors.

[0006] As a further improvement, the reserved connection hole is a truncated cone hole, the upper bottom diameter of the truncated cone hole is 30 mm, and the lower bottom diameter of the truncated cone hole is 40 mm.

[0007] As a further improvement, the screw connecting piece includes an M12 tension screw, a 34*5mm gasket and an M12 nut.

[0008] As a further improvement, both ends of the tension screw are locking parts, the middle part of the tension screw is a smooth part, and the locking part has an external thread.

[0009] As a further improvement, a concrete casting wall is cast between the two groups of the concrete module precast walls, and the concrete casting wall is used to reinforce the connection between the two groups of the concrete module precast walls.

[0010] As a further improvement, the cast concrete wall is provided with U-shaped connecting bars and U-shaped structural steel bars at equidistant positions from the two groups of the concrete module prefabricated walls. The U-shaped structural steel bars and the U-shaped connecting bars are used to connect the longitudinal steel bars of the upper and lower layers of the concrete modular shear walls.

[0011] The beneficial effects of the utility model are as follows: by arranging vertical stress-bearing steel bars and horizontal stress-bearing steel bars in the concrete prefabricated wall, the bending moment and shear force borne by the shear wall are achieved, thereby making the shear wall more stable; secondly, by arranging annular stirrups, two groups of concrete module prefabricated walls are overlapped by the annular stirrups to form a preliminary positioning, thereby making the connection of the two groups of concrete module prefabricated walls easier; finally, by adopting U-shaped connecting bars and U-shaped structural steel bars, the connection of the upper and lower layers of concrete modular shear walls is easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the assembled plane structure of the utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0015] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle BB;

[0016] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the CC;

[0017] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle screw connector.

[0018] Reference numerals:

[0019] 1-annular stirrups, 2-screw connector, 21-smooth part, 22-locking part, 23-nut, 24-gasket, 3-cast concrete wall, 4-concrete module precast wall, 5-U-shaped connecting bar, 6-vertical stress-bearing steel bar, 7-horizontal stress-bearing steel bar, 8-cone hole, 9-U-shaped structural steel bar. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0021] In the description of the present invention, the terms "upper", "lower", "above", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] Reference Figure 1-5 As shown, this embodiment provides a connection node for a concrete modular shear wall, wherein the connection node is used to connect two groups of spaced-apart concrete module prefabricated walls 4, and the two groups of concrete module prefabricated walls 4 include vertical stress-bearing steel bars 6, horizontal stress-bearing steel bars 7, annular stirrups 1 and reserved connection holes. The vertical stress-bearing steel bars 6 are used to bear the bending moment borne by the shear wall, and the horizontal stress-bearing steel bars 7 are used to bear the shear force borne by the shear wall. The two groups of annular stirrups 1 overlap each other, and the reserved connection holes realize the positioning and fixation of the two groups of concrete module prefabricated walls 4 through screw connectors 2.

[0023] By arranging vertical stress-bearing steel bars 6 and horizontal stress-bearing steel bars 7 in the concrete precast wall, the shear wall is able to withstand bending moment and shear force, thereby making the shear wall more stable; secondly, by arranging annular stirrups 1, two groups of concrete module precast walls 4 are overlapped by the annular stirrups 1 to form a preliminary positioning, thereby making the connection of the two groups of concrete module precast walls 4 easier.

[0024] Furthermore, the reserved connection hole is a truncated cone hole 8, the upper bottom diameter of the truncated cone hole 8 is 30 mm, and the lower bottom diameter of the truncated cone hole 8 is 40 mm.

[0025] Furthermore, the screw connector 2 includes an M12 tension screw, a 34*5mm gasket 24 and an M12 nut 23, the two ends of the tension screw are locking parts 22, the middle part of the tension screw is a smooth part 21, and the locking part 22 has an external thread.

[0026] By setting the reserved connection holes as truncated cone holes 8, the two groups of concrete module prefabricated walls 4 are prevented from cracking when pouring cavity concrete. The horizontal compressive strength of the concrete module shear wall is enhanced by tensioning the screws. At the same time, as permanent reinforcement bars of the shear wall, the structural stiffness and seismic resistance of the shear wall are improved, and the stress stability of the concrete module structural system is further enhanced.

[0027] Furthermore, a concrete casting wall 3 is cast between the two groups of the concrete module precast walls 4 , and the concrete casting wall 3 is used to reinforce the connection between the two groups of the concrete module precast walls 4 .

[0028] Furthermore, the cast concrete wall 3 is provided with U-shaped connecting bars 5 and U-shaped structural steel bars 9 at equal distances from the two groups of the concrete module prefabricated walls 4, and the U-shaped structural steel bars 9 and the U-shaped connecting bars 5 are used to connect the longitudinal steel bars of the upper and lower layers of the concrete modular shear walls.

[0029] By adopting U-shaped connecting bars 5 and U-shaped structural steel bars 9, the connection between the upper and lower layers of concrete modular shear walls is made easier, and a certain distance is ensured between the U-shaped structural steel bars 9 and the U-shaped connecting bars 5 and the concrete module prefabricated walls 4 to ensure the bonding strength between the U-shaped structural steel bars 9 and the U-shaped connecting bars 5.

[0030] The use steps of this utility model:

[0031] S1, factory prefabrication of concrete modules: When the concrete module prefabricated wall 4 is poured, the vertical stress-bearing steel bars 6, the horizontal stress-bearing steel bars 7, and the annular stirrups 1 need to be tied or welded according to the design requirements, and reserved connection holes are set at the same time.

[0032] S2. Before installation of concrete modules: Before hoisting, the modules should be measured and marked, and installation positioning marks and alignment ink lines should be drawn on the modules. The building plane position and elevation should be re-measured, and the elevation of the structural surface supporting the modules should be reviewed and accepted.

[0033] S3, during the installation of the concrete module: during the installation of the precast concrete wall, a leveling gasket 24 should be provided between the bottom of the precast concrete wall and the concrete floor slab, and the leveling gasket 24 is placed at a relatively rigid part of the precast concrete wall. Both sets of precast concrete walls can be dropped vertically, and the exposed annular stirrups 1 of the precast concrete wall form an effective overlap with the exposed annular stirrups 1 of the precast concrete wall during the installation of the precast concrete wall.

[0034] S4, installation of screw connector 2: After the concrete prefabricated wall is installed in place and before the concrete is poured on site, the screw connector 2 is installed through the truncated cone holes 8 reserved in the two groups of concrete prefabricated walls to prevent the two groups of concrete prefabricated walls from cracking when pouring the cavity concrete, enhance the horizontal compressive strength of the concrete module shear wall, and at the same time serve as a permanent reinforcement of the concrete module shear wall to improve the structural rigidity and seismic performance of the concrete module shear wall. After the screw connector 2 is installed, the reserved connection hole is grouted and filled to form a reliable connection, and the next step is carried out after the grouting hardens.

[0035] S5, pouring of cast-in-place concrete and setting of vertical connecting bars: After the screw connector 2 is installed, the concrete pouring wall 3 is poured in the cavity, that is, the concrete pouring wall 3 is connected with the concrete precast wall to form a concrete module shear wall. At the same time, U-shaped connecting longitudinal bars and U-shaped structural steel bars 9 are set in the concrete pouring wall 3 for connecting the longitudinal bars of the upper and lower layers of the concrete pouring wall 3 to meet the horizontal shear resistance requirements at the joints.

[0036] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A connection node for a concrete modular shear wall, characterized in that: The connection node is used to connect two groups of concrete module prefabricated walls that are spaced apart. The two groups of concrete module prefabricated walls include vertical stress-bearing steel bars, horizontal stress-bearing steel bars, annular stirrups and reserved connection holes. The vertical stress-bearing steel bars are used to bear the bending moment borne by the shear wall, and the horizontal stress-bearing steel bars are used to bear the shear force borne by the shear wall. The two groups of annular stirrups overlap each other, and the reserved connection holes realize the positioning and fixation of the two groups of concrete module prefabricated walls through screw connectors.

2. The connection node for concrete modular shear wall according to claim 1, characterized in that: The reserved connection hole is a truncated cone hole, the upper bottom diameter of the truncated cone hole is 30 mm, and the lower bottom diameter of the truncated cone hole is 40 mm.

3. The connection node for concrete modular shear wall according to claim 1, characterized in that: The screw connecting piece includes an M12 tension screw, a 34*5mm gasket and an M12 nut.

4. The connection node for concrete modular shear wall according to claim 3, characterized in that: Both ends of the tension screw rod are locking parts, the middle part of the tension screw rod is a smooth part, and the locking part has an external thread.

5. The connection node for concrete modular shear wall according to claim 1, characterized in that: A concrete casting wall is cast between the two groups of the concrete module precast walls, and the concrete casting wall is used to reinforce the connection between the two groups of the concrete module precast walls.

6. The connection node for concrete modular shear wall according to claim 5, characterized in that: The cast concrete wall is provided with U-shaped connecting bars and U-shaped structural steel bars at equal distances from the two groups of concrete module prefabricated walls. The U-shaped structural steel bars and the U-shaped connecting bars are used to connect the longitudinal steel bars of the upper and lower layers of the concrete modular shear walls.

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