CN221798748U - A shear connection node based on steel section - Google Patents

Abstract

The utility model provides a shear-resistant connection node based on steel sections, which can reduce the number of additional shear-resistant steel bars, reduce the difficulty and cost of component production; and can simplify the installation process at the construction site and reduce the difficulty of component installation. The shear-resistant connection node based on steel sections includes: anchor embedded parts, shear-resistant steel sections and corrugated pipes; the anchor embedded parts are embedded in the lower structure, and the top surface of the anchor embedded parts is flush with the upper surface of the lower structure; the lower end of the shear-resistant steel section is fixedly connected to the top surface of the anchor embedded parts; the corrugated pipe is embedded in the upper prefabricated wall panel, and the lower port of the corrugated pipe is flush with the bottom surface of the upper prefabricated wall panel; after the upper prefabricated wall panel is butt-jointed with the lower structure, the shear-resistant steel section is inserted into the corrugated pipe, and grouting material is poured into the corrugated pipe.

Description

A shear connection node based on steel section

Technical Field

The utility model relates to a connection node, in particular to a shear-resistant connection node based on section steel, and belongs to the technical field of assembled concrete buildings.

Background Art

Prefabricated concrete box houses are a new type of assembled concrete buildings. Their basic components are prefabricated concrete box modules produced in factories. After the modules are transported to the site, they are assembled by machinery. Compared with conventional assembled buildings, one prefabricated concrete box module is a house, which has a higher degree of integration and construction speed, and is suitable for temporary and permanent buildings that need to be built quickly.

The horizontal connection nodes between precast concrete box modules play the role of connecting the upper and lower wall panels. The structural measures and stress performance of this node directly determine the seismic performance of the precast concrete box house and are the key to ensuring the structural safety of the box house. Generally speaking, the horizontal joints of precast shear wall panels mainly bear the effects of bending and shearing, and the shearing effect of the horizontal joints in the bottom reinforcement area of the building is particularly obvious.

At present, the tensile force of the horizontal joints of box-type modules can be borne by the vertical force-bearing steel bars through the steel sleeve grouting connection; but for the shear effect of the joints, since the cross-sectional area of the steel bars accounts for a very small proportion of the joint cross-section, it is necessary to add a large number of additional shear steel bars to resist the shear effect of the joints only by increasing the cross-sectional area of the steel bars. Each shear steel bar needs to be connected by sleeve grouting, which not only increases the production difficulty and processing cost of prefabricated components, but also brings many additional processes to the installation of prefabricated wall panels on the construction site.

Utility Model Content

In view of this, the utility model provides a shear connection node based on steel sections, which can reduce the number of additional shear reinforcement bars, reduce the difficulty and cost of component production; and can simplify the installation process at the construction site and reduce the difficulty of component installation.

The technical solution of the utility model is: a steel shear-resistant connection node comprises: anchor embedded parts, shear-resistant steel and corrugated pipe;

The anchor embedded part is embedded in the lower structure, and the top surface of the anchor embedded part is flush with the upper surface of the lower structure;

The lower end of the shear-resistant steel is fixedly connected to the top surface of the anchor embedded part;

The corrugated pipe is pre-buried in the upper prefabricated wall panel, and the lower end of the corrugated pipe is flush with the bottom surface of the upper prefabricated wall panel;

After the upper prefabricated wall panel is butt-jointed with the lower structure, the shear-resistant steel is inserted into the corrugated pipe, and grouting material is poured into the corrugated pipe.

Preferably: the anchor embedded parts include: anchor steel, anchor steel plate and anchor steel bar;

The anchoring steel plate is arranged horizontally, and the upper end surface of the anchoring steel is fixedly connected to the middle position of the lower end surface of the anchoring steel plate; an anchoring steel bar group is symmetrically arranged on the left and right sides of the anchoring steel on the lower end surface of the anchoring steel plate, and each anchoring steel bar group includes a plurality of anchoring steel bars arranged in parallel and at intervals; the anchoring steel bars are opened outward at a set angle relative to the anchoring steel.

Preferably, the outer circumference of the corrugated pipe is wrapped with spiral stirrups.

Preferably, the anchoring steel bar forms an angle of 45° with the vertical direction.

Preferably, the lower end of the anchor steel bar has an inwardly bent hook.

Preferably, the upper end of the corrugated pipe is bent to be flush with the inner side surface of the upper prefabricated wallboard and serves as a grouting port.

Preferably, the lower structure is a bottom foundation or a lower prefabricated wall panel.

Preferably, sealing materials are provided on both sides of the anchor embedded parts in the thickness direction of the top of the lower structure.

Beneficial effects:

(1) In the shear connection node of the utility model, shear-resistant steel is used. Compared with the traditional connection method of shear steel bars, shear-resistant steel is used in combination with corrugated pipes and anchor embedded parts to achieve the connection between the upper prefabricated wall panel and the lower structure; since the cross-sectional area of the steel is large, one steel can replace many large-diameter steel bars, so the number of additional shear steel bars and corresponding connection sleeves can be effectively reduced, thereby reducing the difficulty of on-site installation.

(2) In the shear-resistant connection node of the utility model, the embedded anchor steel plate is flush with the surface of the lower structure, which avoids the problem of needing to open a hole in the mold on the side of the prefabricated wall panel when the lower structure is a prefabricated wall panel, and can reduce the mold processing cost to a certain extent.

(3) In the shear-resistant connection node of the utility model, the anchor embedded parts adopt a combination of anchor steel and anchor steel bars, which, on the one hand, enhances the shear stiffness of the anchor embedded parts themselves, and on the other hand, improves the anchoring effect between the anchor embedded parts and the surrounding concrete, thereby better combining the two.

(4) In the shear-resistant connection node of the utility model, spiral stirrups are wrapped around the outer circumference of the corrugated pipe, which can play a role in strengthening the concrete around the corrugated pipe.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a front view of a shear connection node based on section steel of the present invention;

FIG2 is a side view of the shear connection node based on steel sections of the present invention (a schematic diagram along the thickness direction of the upper prefabricated wall panel);

FIG3 is a front view of the anchor embedded part;

FIG. 4 is a side view of the anchor embedded part.

Among them: 1-anchor embedded parts; 2-shear-resistant steel; 3-corrugated pipe; 4-grouting material; 5-spiral stirrups; 6-lower structure; 7-upper prefabricated wall panels; 8-sealing materials; 11-anchor steel; 12-anchor steel plate; 13-anchor steel bars.

DETAILED DESCRIPTION

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

The present embodiment provides a shear connection node for use in the horizontal joints of prefabricated wall panels in prefabricated concrete box-type houses. The shear connection node is mainly used at the position where the shear stress of the bottom joint of the prefabricated wall panels is relatively large. It can reduce the number of additional shear steel bars and reduce the difficulty and cost of prefabricated component production; it can also simplify the installation process at the construction site and reduce the difficulty of component installation.

As shown in FIG. 1 and FIG. 2 , the shear-resistant connection node based on profiled steel includes: an anchor embedded part 1 , a shear-resistant profiled steel 2 , a corrugated pipe 3 and a spiral stirrup 5 .

As shown in Figures 3 and 4, the anchor embedded part 1 includes: an anchor steel 11, an anchor steel plate 12 and an anchor steel bar 13; the anchor steel plate 12 is arranged horizontally, and the upper end surface of the anchor steel 11 is welded to the middle position of the lower end surface of the anchor steel plate 12; an anchor steel bar group is symmetrically arranged on both sides of the left and right sides of the anchor steel 11 on the lower end surface of the anchor steel plate 12, and each anchor steel bar group includes a plurality of anchor steel bars 13 arranged in parallel and evenly spaced along the thickness direction of the wall panel; the upper end of the anchor steel bar 13 is welded to the lower end surface of the anchor steel plate 12, and the lower end is obliquely opened outward relative to the anchor steel 11, and the lower end of the anchor steel bar 13 has an inward (towards the anchor steel 11) bent hook to enhance the anchoring effect.

As an example, the anchoring steel 11 is a steel such as a channel steel or an I-beam, and the specific anchoring length is given by the design; the width of the anchoring steel 11 (the dimension along the thickness direction of the lower structure 6) is less than the thickness of the lower structure 6; the anchoring steel plate 12 is a rectangular steel plate, and the thickness meets the set anchoring and welding performance requirements; the anchoring steel bar 13 is an HRB400 grade steel bar, and 4 or 6 anchoring steel bars are set according to the size of the anchoring steel plate 12 and the anchoring requirements (that is, two or three anchoring steel bars 13 are set in parallel on each side at intervals), and the diameter and anchoring length of the anchoring steel bar 13 should meet the set anchoring requirements. The anchoring steel bar 13 forms a 45° angle with the side of the anchoring steel 11 (that is, with the vertical direction).

The anchoring embedded part 1 is integrally embedded and anchored in the lower structure 6, and the upper surface of the anchoring steel plate 12 is flush with the top surface of the lower structure 6; and the anchoring embedded part 1 is located in the middle position in the thickness direction of the lower structure 6. The lower structure 6 can be a bottom foundation or a lower prefabricated wall panel of a prefabricated shear wall according to the site conditions. In the shear-resistant connection node, the embedded anchor steel plate 12 is flush with the surface of the lower structure 6, which avoids the problem of opening holes in the side mold of the prefabricated wall panel when the lower structure 6 is a prefabricated wall panel, and can reduce the mold processing cost to a certain extent; the reason is: when the prefabricated wall panel is produced, the panel is laid down, and molds are set up around it, and then concrete is poured in the mold. If the surrounding sides are flush, the mold of each side can be a flat steel plate surface, but if there are embedded parts protruding from the concrete surface (including steel bars or steel embedded parts), it is necessary to open a hole in the mold on this side so that the embedded part can pass through the mold; because the mold hole not only directly increases the mold processing cost, but also makes the mold part universal and cannot be used for side molds of other components, it also indirectly increases the mold cost.

The shear-resistant steel 2 is a steel such as a channel steel or an I-beam. Before the upper prefabricated wall panel 7 is installed, the lower end surface of the shear-resistant steel 11 is welded to the middle position of the upper surface of the anchor steel plate 12 in advance.

The corrugated tube 3 with spiral stirrups 5 wrapped around its outer circumference is completely embedded in the lower part of the upper prefabricated wall panel 7, so that the lower end of the corrugated tube 3 is flush with the bottom surface of the upper prefabricated wall panel 7, and the upper end of the corrugated tube 3 is flush with the inner side surface of the upper prefabricated wall panel 7 after being bent (usually 90°); the height of the vertical part of the corrugated tube 3 is greater than the height of the shear-resistant steel 2.

The bellows 3 is a metal bellows, and the inner diameter of the bellows 3 is larger than the maximum size of the cross-section of the shear-resistant steel 2 (i.e., to ensure that the shear-resistant steel 2 can be inserted into the bellows 3); before the upper prefabricated wall panel 7 is installed in place (before docking with the lower structure 6), it should be ensured that there is no blockage in the bellows 3.

The spiral stirrup 5 is made of HRB400 grade steel bars and is spiral in shape as a whole. It is wound around the outside of the corrugated pipe 3 and embedded in the upper prefabricated wall panel 7 to strengthen the concrete around the corrugated pipe 3 .

After the upper prefabricated wall panel 7 is installed in place (i.e., after the upper prefabricated wall panel 7 is docked and installed with the lower structure 6), the shear-resistant steel 2 is inserted into the corrugated pipe 3, and the grouting material 4 is poured into the corrugated pipe 3 (the upper port of the corrugated pipe 3 is used as the grouting port), thereby forming a shear-resistant connection node.

On both sides of the anchoring steel plate 12 in the thickness direction of the top of the lower structure 6 (referring to the outer and inner sides of the anchoring steel plate 12 in the horizontal gap between the lower structure 6 and the upper prefabricated wall panel 7), a sealing material 8 is arranged; the sealing material 8 can be materials such as mortar or rubber sealing strips; the sealing material 8 is applied in place before the upper prefabricated wall panel 7 is installed in place, and the gap between the upper prefabricated wall 7 and the lower structure 6 is sealed by the sealing material 8 to avoid leakage when pouring grouting material into the corrugated pipe 3.

The installation process of the shear connection node is as follows:

(1) When the lower structure 6 is a cast-in-place foundation, before pouring the foundation concrete, the anchor embedded part 1 is fixed according to the requirements of this scheme (when the lower structure is a cast-in-place foundation, before pouring the concrete, the steel bars of the cast-in-place foundation have been erected, so it is only necessary to limit and fix the anchor embedded part 1 on the steel skeleton so that the anchor embedded part 1 is suspended in the corresponding position); when the lower structure 6 is a prefabricated wall panel, the anchor embedded part 1 should be fixed on the production mold of the prefabricated wall panel before the prefabricated wall panel is manufactured to ensure that the top surface of the embedded steel plate 12 is flush with the top surface of the prefabricated wall panel;

(2) When the lower structure 6 is a cast-in-place foundation, the shear steel 2 and the anchor steel plate 12 shall be welded and the weld quality shall be checked before the upper prefabricated wall panels 7 are installed in place; when the lower structure 6 is a prefabricated wall panel, the shear steel 2 and the anchor steel plate 12 shall be welded and the weld quality shall be checked before the lower prefabricated wall panels 7 are hoisted, and the lower structure 6 shall be installed in place.

(3) Applying blocking material 8 on the top surface of the lower structure 6 and on both sides along the thickness direction of the wallboard;

(4) Lift the upper prefabricated wall panel 7, check whether the channel of the corrugated pipe 3 is blocked, and install the upper prefabricated wall panel 7 in place so that the shear-resistant steel 2 penetrates into the interior of the corrugated pipe 3;

(5) Mix the grouting material and use the grouting equipment to pour the grouting material 4 into the corrugated pipe 3 until it is full, and then start the curing of the grouting material. After the curing is completed, the connection of the shear connection node of the wall panel is completed.

Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims (8)

1. The utility model provides a shear connection node based on shaped steel which characterized in that: comprising the following steps: the anti-shearing device comprises an anchoring embedded part (1), shearing-resistant steel (2) and a corrugated pipe (3);

the anchoring embedded part (1) is embedded in the lower structure (6), and the top surface of the anchoring embedded part (1) is flush with the upper surface of the lower structure (6);

The lower end of the shear steel (2) is fixedly connected with the top surface of the anchoring embedded part (1);

The corrugated pipe (3) is embedded in the upper prefabricated wallboard (7), and the lower port of the corrugated pipe (3) is flush with the bottom surface of the upper prefabricated wallboard (7);

After the upper prefabricated wallboard (7) is in butt joint with the lower structure (6), the shear-resistant steel (2) is inserted into the corrugated pipe (3), and grouting material (4) is poured into the corrugated pipe (3).

2. The section steel-based shear connection node of claim 1, wherein: the anchoring embedded part (1) comprises: an anchoring section steel (11), an anchoring steel plate (12) and an anchoring steel bar (13);

The anchoring steel plate (12) is horizontally arranged, and the upper end face of the anchoring profile steel (11) is fixedly connected with the middle position of the lower end face of the anchoring steel plate (12); each of the anchoring steel bar sets comprises a plurality of anchoring steel bars (13) which are arranged in parallel at intervals; the anchoring steel bars (13) are outwards opened by a set angle relative to the anchoring profile steel (11).

3. The section steel-based shear connection node of claim 1 or 2, wherein: the outer circumference of the corrugated pipe (3) is wound with spiral stirrups (5).

4. The section steel-based shear connection node of claim 2, wherein: the anchor steel bar (13) forms an included angle of 45 degrees with the vertical direction.

5. The section steel-based shear connection node of claim 2 or 4, wherein: the lower end of the anchoring steel bar (13) is provided with an inward hook.

6. The section steel-based shear connection node of claim 1 or 2, wherein: the upper port of the corrugated pipe (3) is bent and then is flush with the inner side surface of the upper prefabricated wallboard (7) to serve as a grouting port.

7. The section steel-based shear connection node of claim 1 or 2, wherein: the substructure (6) is a bottom foundation or a lower prefabricated wall panel.

8. The section steel-based shear connection node of claim 1 or 2, wherein: plugging materials (8) are arranged on two sides of the anchoring embedded part (1) in the thickness direction of the top of the lower structure (6).