CN114319642A - Vertical connecting node of assembled concrete shear wall and construction method - Google Patents

Abstract

The invention provides an assembled concrete shear wall vertical connecting node which is used for connecting an upper shear wall and a lower shear wall, wherein the upper shear wall and the lower shear wall are arranged in a vertical opposite mode and comprise first box section steel, second box section steel, first T-shaped steel and second T-shaped steel, the first box section steel is arranged at the bottom of the upper shear wall, the second box section steel is arranged at the top of the lower shear wall, the flange of the first T-shaped steel is arranged in an opposite mode and connected with the flange of the second T-shaped steel, the end portion of a web plate of the first T-shaped steel is connected with the first box section steel, and the end portion of the second T-shaped steel is connected with the second box section steel. The invention also provides a construction method of the vertical connecting node of the fabricated concrete shear wall. The invention reduces the construction error of the connecting node, simplifies the construction process, improves the construction speed and brings convenience to the subsequent structure construction.

Description

Vertical connection node and construction method of prefabricated concrete shear wall

technical field

The invention relates to the technical field of prefabricated buildings, in particular to a vertical connection node of an assembled concrete shear wall and a construction method.

Background technique

In order to promote the development of prefabricated buildings, the country has issued a number of plans for prefabricated buildings. The "Industrial Building Evaluation Standards" released at the end of 2015 determined that prefabricated buildings should be fully promoted nationwide; the "Outline of Construction Industry Modernization Construction" set the goals of the modernization of the construction industry, enabling the construction of prefabricated buildings to achieve breakthroughs.

The prefabricated structure is widely accepted at home and abroad, mainly because it has the advantages of less on-site wet work, fast construction speed, high component quality, good economic and social environmental benefits, and at the same time saves building materials, which is conducive to the sustainable development of society. The research shows that the non-cast-in-place beam-column joint can also have a good force transmission mechanism and energy dissipation capacity. The huge demand for construction, the increasing requirements for energy conservation and environmental protection, and the continuous increase in labor costs make prefabricated concrete structures become one of the technologies that will be vigorously promoted in the construction field in my country in the future.

Compared with traditional nodes, prefabricated nodes can reduce engineering costs and meet the requirements of energy saving and consumption reduction. The dry-connected prefabricated nodes do not need cast-in-place concrete during the building assembly process, but are connected by bolts, welding, corbels, etc. The dry connection has the advantages of simple and fast construction, good stability and high bearing capacity. However, the existing prefabricated concrete shear wall dry-type connection nodes have large installation errors, complicated construction procedures, and inconvenient installation.

Therefore, the present invention provides a vertical dry-type connection node of an assembled concrete shear wall and a construction method, which realizes the simplification of the connection node and facilitates the installation of the node.

SUMMARY OF THE INVENTION

In view of the defects in the prior art, the purpose of the present invention is to provide a vertical connection node and a construction method of a prefabricated concrete shear wall.

The vertical connection node of the prefabricated concrete shear wall provided by the present invention is used for the connection of the upper shear wall and the lower shear wall. The upper shear wall and the lower shear wall are arranged opposite to each other, and the connection node It includes a first box-shaped steel, a second box-shaped steel, a first T-shaped steel, and a second T-shaped steel. The first box-shaped steel is arranged at the bottom of the upper shear wall, and the second box-shaped steel is arranged at the lower shear wall. On the top of the force wall, the flange of the first T-shaped steel is oppositely arranged and connected to the flange of the second T-shaped steel, and the web end of the first T-shaped steel is connected to the first box-shaped steel, so The end of the second T-shaped steel is connected with the second box-shaped steel.

Further, the flange of the first T-shaped steel and the flange of the second T-shaped steel are connected by bolts.

Further, the first T-shaped steel and the first box-shaped steel, and the second T-shaped steel and the second box-shaped steel are connected by welding.

Further, a first channel steel is provided on both sides of the web of the first T-shaped steel, a second channel steel is provided on both sides of the web of the second T-shaped steel, and the upper flange of the first channel steel is provided. It is connected with the first box-shaped steel, the lower flange of the second channel steel is connected with the second box-shaped steel, the first channel steel is also connected with the first T-shaped steel, and the second channel steel is connected with the first T-shaped steel. Also connected with the second T-section steel.

Further, the first channel steel and the first box-shaped steel, and the second channel steel and the second box-shaped steel are welded and connected.

Further, the web of the first T-shaped steel is connected with the first channel steel on both sides by bolts, and the web of the second T-shaped steel is connected with the second channel steel on both sides by bolts.

Further, the flange of the first T-shaped steel and the flange of the second T-shaped steel are connected with the flanges of the first channel steel and the second channel steel on both sides by bolts.

Further, the two sides of the first box-shaped steel and the second box-shaped steel are welded and connected with vertically distributed steel bars and concealed column longitudinal bars.

Further, slot holes are provided at the bolt connections of the first T-shaped steel, the second T-shaped steel, the first channel steel, and the second channel steel.

The present invention also provides a construction method for the vertical connection node of the prefabricated concrete shear wall, the construction method comprising the following steps:

welding the first T-shaped steel, the first channel steel and the first box-shaped steel, and the second T-shaped steel, the second channel steel and the second box-shaped steel;

Binding vertically distributed steel bars and dark column longitudinal bars and welding with the first box-shaped steel and the second box-shaped steel;

After the formwork is supported, concrete is poured and prefabricated;

Hoist the prefabricated shear wall into place;

The first T-shaped steel, the first channel steel, the second T-shaped steel, and the second channel steel are connected and fixed by bolts.

Compared with the prior art, the present invention has the following beneficial effects:

1. The combination of welding and bolt connection of the present invention simplifies the construction process, improves the construction speed, and brings convenience to subsequent structural construction.

2. The connecting nodes of the present invention are provided with slots and cross-shaped joints, which reduce the errors in installation and make the positioning of the upper and lower shear walls more accurate.

3. The present invention adopts prefabricated concrete shear walls to connect nodes vertically, which reduces the energy consumption of building construction, reduces carbon emissions, and meets the technical requirements of green construction.

Description of drawings

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

1 is a three-dimensional schematic diagram of a vertical connection node of a fabricated concrete shear wall according to an embodiment of the present invention;

Fig. 2 is the internal detailed view of the vertical connection node of the fabricated concrete shear wall according to the embodiment of the present invention;

3 is a side view of a vertical connection node of a fabricated concrete shear wall according to an embodiment of the present invention;

4 is a partial detailed view of a vertical connection node of a fabricated concrete shear wall according to an embodiment of the present invention.

In the figure,

11- Upper Shear Wall,

12- Lower Shear Wall,

21- The first box section steel,

22-Second box section steel,

31 - First T-beam,

32-Second T-beam

41 - first channel steel,

42-Second channel steel,

5- Vertical distribution of steel bars,

6- Horizontal distribution of reinforcement bars,

7- Longitudinal bars of dark columns,

8- Concealed column stirrups;

9 - Bolts.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.

The present invention provides a vertical connection node of an assembled concrete shear wall. As shown in Figures 1 and 4, the connection node of the present invention is used for the connection of the upper shear wall 11 and the lower shear wall 12. The wall 11 and the lower shear wall 12 are arranged opposite to each other up and down. The inner side of the upper shear wall 11 is provided with a first box-shaped steel 21 at the bottom position, the inner side of the lower shear wall 12 is provided with a second box-shaped steel 22 at the top position, and between the first box-shaped steel 21 and the second box-shaped steel 22 There are a first T-shaped steel 31 and a second T-shaped steel 32, the flange of the first T-shaped steel 31 and the flange of the second T-shaped steel 32 are arranged oppositely, and the web end of the first T-shaped steel 31 is welded with the first box-shaped steel 21. For connection, the web end of the second T-shaped steel 32 is connected to the second box-shaped steel 22 by welding.

Both sides of the web of the first T-shaped steel 31 are respectively provided with a first channel steel 41 , and both sides of the web of the second T-shaped steel 32 are respectively provided with a second channel steel 42 . The box-shaped steel 21 is connected by welding, and one side flange of the second channel steel 42 is connected with the second box-shaped steel 22 by welding. The webs of the first T-shaped steel 31 and the webs of the first channel steels 41 on both sides are connected by bolts, and the webs of the second T-shaped steel 32 are connected with the webs of the second channel steels 42 on both sides by bolts. The flanges of the first T-shaped steel 31 , the flanges of the second T-shaped steel 32 , and the flanges of the first channel steel 41 and the second channel steel 42 on both sides are connected by bolts.

As shown in FIG. 4 , in order to reduce the installation error, slot holes are provided at the bolt connections of the first T-shaped steel 31, the first channel steel 41, the second T-shaped steel 32, and the second channel steel 42, and the slot holes are ten The zigzag cross-stitching method, that is, the slot holes at the connection between the channel steel and the T-shaped steel are respectively along two directions, and each is a "line-shaped" slot hole.

In this embodiment, the bolts 9 used for connection are all high-strength bolts.

In order to reduce the damage of the bending moment to the upper shear wall 11 and the lower shear wall 12, vertically distributed steel bars 5 and dark column longitudinal bars 7 are welded on both sides of the first box-shaped steel 21 and the second box-shaped steel 22.

The construction method of the vertical connection node of the prefabricated concrete shear wall of the present embodiment specifically includes the following steps:

In the factory, the first T-shaped steel 31 and the first box-shaped steel 21, the second T-shaped steel 32 and the second box-shaped steel 22 are welded first, and the flanges of the first channel steel 41 on both sides are welded with the first box-shaped steel 21, the second The channel steel 42 is welded with the second box steel 22;

The vertical distribution steel bars 5 and the dark column longitudinal bars 7 are arranged on the front and rear sides of the first box-shaped steel 21 and the second box-shaped steel 22 and are welded and fixed, and the dark column stirrups 8 and the dark column longitudinal bars 7 are vertically fixed and bound, The horizontal distribution steel bar 6, the vertical distribution steel bar 5 and the dark column longitudinal bar 7 are bound;

Support the formwork and pour concrete, and prefabricate the upper shear wall 11 and the lower shear wall 12;

Transport and hoist the prefabricated upper shear wall 11 and lower shear wall 12 to the position specified in the design, and place the high-strength bolts 9 to be used;

The first channel steel 41, the second channel steel 42, the first T-shaped steel 31, and the second T-shaped steel 32 are connected and fixed by bolts 9 through the cross-shaped slot holes.

The invention also discloses a specific embodiment of the vertical connection node of the prefabricated concrete shear wall. In this embodiment, the total size of the prefabricated concrete shear wall is 2800×1700×200mm, and the section of the dark columns at both ends is 400×200mm. In the hidden column area of the shear wall, the longitudinal reinforcement is 6 Ф16 steel bars, the hidden column stirrups are Ф10@100, and the hoops on both limbs. The horizontal distribution bars and vertical distribution bars of the shear wall are made of threaded steel bars of Ф14@100, and there are 2 rows along the width direction of the section. The first box-shaped steel 21 and the second box-shaped steel 22 are made of Q345 steel, and the model is HN400×100×10×10; the first T-shaped steel 31 and the second T-shaped steel 32 are made of Q345 steel, and the model is TN600×200×20×20; The first channel steel 41 and the second channel steel 42 are made of Q345 steel, and the model is [180×90×10. The high-strength bolts are of grade 10.9 with a diameter of 12mm and a spacing of 150mm.

The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essential content of the present invention. The embodiments of the present application and features in the embodiments may be arbitrarily combined with each other without conflict.

Claims (10)

1. The utility model provides a vertical connected node of assembled concrete shear force wall for go up the connection of shear force wall and lower shear force wall, go up the shear force wall with relative setting from top to bottom down of shear force wall, its characterized in that includes first box shaped steel, second box shaped steel, first T shaped steel, second T shaped steel, first box shaped steel is located go up the bottom of shear force wall, second box shaped steel is located the top of shear force wall down, the edge of a wing of first T shaped steel with the edge of a wing of second T shaped steel sets up relatively and connects, the web tip of first T shaped steel with first box shaped steel is connected, the tip of second T shaped steel with second box shaped steel is connected.

2. The fabricated concrete shear wall vertical connection node of claim 1, wherein the flange of the first T-section steel is connected with the flange of the second T-section steel through a bolt.

3. The fabricated concrete shear wall vertical connecting node according to claim 1, wherein the first T-shaped steel and the first box-shaped steel and the second T-shaped steel and the second box-shaped steel are connected through welding.

4. The fabricated concrete shear wall vertical connection node of claim 1, wherein first channel steel is arranged on two sides of a web plate of the first T-shaped steel, second channel steel is arranged on two sides of a web plate of the second T-shaped steel, an upper flange of the first channel steel is connected with the first box-shaped steel, a lower flange of the second channel steel is connected with the second box-shaped steel, the first channel steel is further connected with the first T-shaped steel, and the second channel steel is further connected with the second T-shaped steel.

5. The fabricated concrete shear wall vertical connection node of claim 4, wherein the first channel steel is welded to the first box steel and the second channel steel is welded to the second box steel.

6. The fabricated concrete shear wall vertical connection node of claim 4, wherein a web of the first T-shaped steel is connected with the first channel steel on two sides through bolts, and a web of the second T-shaped steel is connected with the second channel steel on two sides through bolts.

7. The fabricated concrete shear wall vertical connection node as claimed in claims 2 and 6, wherein flanges of the first T-section steel and flanges of the second T-section steel are connected with flanges of the first channel steel and flanges of the second channel steel on two sides through bolts.

8. The fabricated concrete shear wall vertical connecting node according to claim 1, wherein two sides of the first box section steel and the second box section steel are welded with vertical distribution steel bars and embedded column longitudinal bars.

9. The fabricated concrete shear wall vertical connection node of claim 7, wherein slotted holes are formed at bolt connections of the first T-shaped steel, the second T-shaped steel, the first channel steel and the second channel steel.

10. The construction method of the vertical connection node of the fabricated concrete shear wall according to any one of claims 1 to 9, wherein the construction method comprises the following steps:

welding the first T-shaped steel and the first channel steel with the first box-shaped steel, and welding the second T-shaped steel and the second channel steel with the second box-shaped steel;

binding vertically distributed reinforcing steel bars with embedded column longitudinal bars and welding the vertically distributed reinforcing steel bars with the first box-shaped steel and the second box-shaped steel;

pouring concrete after formwork erecting, and performing prefabrication and molding;

hoisting the prefabricated shear wall in place;

and connecting and fixing the first T-shaped steel, the first channel steel, the second T-shaped steel and the second channel steel through bolts.

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