CN108797845A - Steel plate concrete structure wall crosses connecting node reinforcement structure - Google Patents

Abstract

The invention discloses a steel plate concrete structure wall intersection connection node reinforcement structure, which comprises a first steel plate concrete structure wall and a second steel plate concrete structure wall in an intersection connection, the first steel plate concrete structure wall includes two pieces arranged side by side steel plates, concrete is poured between the two steel plates, the second steel plate concrete structure wall includes two steel plates arranged side by side, concrete is poured between the two steel plates, and the steel plates of the first steel plate concrete structure wall are respectively connected with the second The steel plates of the steel plate concrete structure wall are welded and connected to form a node core area surrounded by 4 steel plates. A reinforcement cage is set in the node core area. The reinforcement cage is poured in concrete in the node core area. Set with pegs. Compared with the prior art, the steel plate concrete structure wall intersection node reinforcement structure of the invention can effectively improve the ductility and mechanical performance of the core area of the node, and improve the safety performance of the nuclear power plant.

Description

Steel plate concrete structure wall intersection connection node reinforcement structure

technical field

The invention belongs to the technical field of civil engineering modular design, more specifically, the invention relates to a steel plate concrete structure wall intersection connection node reinforcement structure.

Background technique

Modular construction technology is an important technical means to shorten the civil construction period, reduce the cost, and improve the economy. It is also a commonly used technology in the field of nuclear power. Existing nuclear power plants generally adopt a new steel plate concrete structure design. This design structure is mainly on both sides. Outer steel plate, self-compacting concrete is poured inside to form a composite wall or floor structure. The steel plate acts as a reinforcement and becomes a formwork when pouring concrete. Such structural modules can be prefabricated in the factory in advance, and then transported to the site to be installed and poured in place to achieve the purpose of shortening the civil construction period.

The joint joints of the steel plate concrete structure walls are similar to the ordinary reinforced concrete structure shear walls. The internal force of the wall is transferred to each other in the core area of the joint joints of the walls to work together. Therefore, the forces in this area are more complicated, and key protection is required.

The existing steel plate concrete structure walls of nuclear power plants are generally L-shaped, T-shaped and cross-shaped. Taking the L-shaped vertically intersecting steel plate concrete structure as an example, two steel plate concrete structure walls are vertically intersected to form the core area of the node. , because the core area of the joint mainly transmits bending moment and shear force, while the core area of the prior art is plain concrete for shear resistance, and the bearing capacity is not high. When the force is applied, shear oblique cracks first appear in the diagonal direction of the core area of the joint If the damage occurs, the shear force cannot be effectively transmitted, and it is difficult to achieve the full strength connection of "strong nodes, weak members", which may easily cause safety accidents.

In view of this, it is indeed necessary to provide a new steel plate concrete structure wall intersection connection joint reinforcement structure with simple structure and convenient operation, so as to improve the mechanical performance of the core area of the joint and improve the safety performance of the nuclear power plant.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a steel plate concrete structure wall junction joint reinforcement structure with simple structure and convenient operation, improve the force performance of the joint core area, and improve the safety performance of the nuclear power plant.

In order to achieve the above object, the present invention provides a steel plate concrete structure wall intersection joint reinforcement structure, including a first steel plate concrete structure wall and a second steel plate concrete structure wall that are connected by intersection, the first steel plate concrete structure wall includes Two steel plates (1a, 1b) arranged side by side, concrete is poured between the two steel plates (1a, 1b), the second steel plate concrete structure wall includes two steel plates (2a, 2b) arranged side by side, and the two steel plates ( Concrete is poured between 2a and 2b), and the steel plates (1a, 1b) of the first steel plate concrete structure wall are respectively welded and connected with the steel plates (2a, 2b) of the second steel plate concrete structure wall, and four steel plate enclosures are formed The core area of the joint is formed, and the steel cage is set in the core area of the joint, and the steel cage is poured in the core area of the joint through concrete, and the steel plate in the core area of the joint is also provided with studs.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the reinforcement cage includes a plurality of horizontal steel bars arranged in the horizontal direction and vertical steel bars arranged in the vertical direction, and is formed by binding.

As an improvement of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the reinforcement cage includes at least 4 vertical reinforcement bars arranged in the vertical direction, and the cross-section of the 4 vertical reinforcement bars arranged in the vertical direction is rectangular or square , the horizontal reinforcing bars in the horizontal direction are vertically bound in the shape of a "well" with the vertical reinforcing bars arranged in the vertical direction.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the size of the steel cage satisfies the following relationship:

x=(1/3～1/2)t1;

y=(1/3～1/2)t2;

z=min(x,y);

L1=t1-2tp1-(10～20)mm;

L2=t2-2tp2-(10～20)mm;

Among them, t1: the wall thickness of the first steel plate concrete structure;

t2: wall thickness of the second steel plate concrete structure;

tp1: the thickness of the steel plate on one side of the wall of the first steel plate concrete structure;

tp2: the thickness of the steel plate on one side of the second steel plate concrete structure wall;

x, y: transverse spacing of horizontal reinforcement;

z: vertical spacing of horizontal steel bars;

L1, L2: length of horizontal reinforcement;

h: length of vertical reinforcement.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the extension line of the horizontal steel bar is vertically arranged with the steel plates at both ends.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the extension line of the horizontal steel bar and the steel plates at both ends are arranged at an angle of 30° to 60°.

As an improvement of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the length of the vertical reinforcement is equal to the height of the steel plate concrete structure wall intersection connection node reinforcement structure.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the length of the horizontal steel bar is smaller than the size of the core area of the joint, and when the steel cage is installed, there is a gap of 5 mm to 10 mm between the horizontal steel bar and the steel plates at both ends.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the diameters of the horizontal steel bar and the vertical steel bar are 10 mm to 40 mm.

As an improvement of the steel plate concrete structure wall intersection connection joint reinforcement structure of the present invention, the steel cage is located in the middle of the joint core area.

Compared with the prior art, the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention can effectively transmit the shear force of the node core area by taking reinforcement cage reinforcement construction measures in the node core area, and the wall limb area first when the wall structure is stressed. When the core area of the node is destroyed, the complete strength connection of "strong node and weak member" is realized, the ductility and bearing capacity performance of the connecting node are improved, and the safety performance of the nuclear power plant can be improved.

Description of drawings

Below, in conjunction with the accompanying drawings and specific implementation methods, the steel plate concrete structure wall intersection connection node reinforcement structure and its beneficial technical effects will be described in detail, wherein:

Fig. 1 is a schematic diagram of the first embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 2 is a schematic diagram of a second embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 3 is a cross-sectional view of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 4 is a structural schematic diagram of a reinforcement cage of a steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 5 is a top view of the reinforcement cage of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 6 is a front view of the reinforcement cage of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 7 is a schematic diagram of a third embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Fig. 8 is a schematic diagram of a fourth embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention.

Reference signs:

10-the first steel plate concrete structure wall; 1a-steel plate; 1b-steel plate; 100-concrete; 20-the second steel plate concrete structure wall; 2a-steel plate; 2b-steel plate; ; 320-horizontal reinforcement; 321-horizontal reinforcement; 322-vertical reinforcement; 40-stud.

Detailed ways

In order to make the purpose, technical solution and beneficial technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

Please refer to Fig. 1 to Fig. 8, the reinforced structure of steel plate concrete structure wall of the present invention includes a first steel plate concrete structure wall 10 and a second steel plate concrete structure wall 20 which are convergingly connected, and the first steel plate concrete structure The wall body 10 includes two steel plates 1a, 1b arranged side by side, and concrete 100 is poured between the two steel plates 1a, 1b. The second steel plate concrete structure wall 20 includes two steel plates 2a, 2b arranged side by side, and the two steel plates 2a Concrete 100 is poured between 2b, and the steel plates 1a, 1b of the first steel plate concrete structure wall 10 are respectively welded and connected with the steel plates 2a, 2b of the second steel plate concrete structure wall 20, and four steel plates 1a, 1b are formed, The joint core area 30 surrounded by 2a and 2b, the joint core area 30 is provided with a reinforcement cage 32, the reinforcement cage 32 is poured in the joint core area 30 through concrete 100, and the steel plates 1a, 1b, 2a, 2b in the joint core area 30 A peg 40 is also welded on.

The steel plate concrete structure wall intersection connection node reinforcement structure generally includes the first steel plate concrete structure wall 10 and the second steel plate concrete structure wall 20 that are connected in L-shape, T-shape and cross-shape. In this application, the vertical The L-shaped structure is described in detail.

Please refer to Fig. 1 and Fig. 2, the steel plate concrete structure wall is vertically L-shaped intersection, the first steel plate concrete structure wall 10 and the second steel plate concrete structure wall 20 are vertically arranged, the first steel plate concrete structure wall 10 includes Two steel plates 1a, 1b arranged side by side, the two steel plates 1a, 1b have a certain thickness and rigidity, the thickness can be selected according to the needs of the site, the steel plates 1a, 1b are welded with studs 40 in the node core area 30, Studs 40 are also welded in other areas for effectively transmitting shear force. The distance between the two steel plates 1a, 1b is poured with concrete 100 to finally form the first steel plate concrete structure wall 10. The thickness and height of the first steel plate concrete structure wall 10 can be set as required.

The second steel plate concrete structure wall 20 includes two steel plates 2a and 2b arranged side by side. The two steel plates 2a and 2b have a certain thickness and rigidity. The thickness can be selected according to the needs of the site. The two steel plates 2a and 2b are welded A number of studs 40 are used to effectively transmit shear force. The distance between the two steel plates 2a and 2b is poured with concrete 100 to finally form the second steel plate concrete structure wall 20. The thickness of the second steel plate concrete structure wall 20 is and height can be set as needed.

Please refer to Fig. 3 to shown in Fig. 6, reinforcement cage 32 comprises the horizontal reinforcing bar 320 that a plurality of horizontal directions are arranged and the vertical reinforcing bar 321 of vertical direction setting and vertical reinforcing bar 322, and by binding molding, the vertical reinforcing bar 322 of vertical direction setting There are at least 4 vertical steel bars 322 arranged in the vertical direction, and the section of the 4 vertical steel bars 322 is rectangular or square when viewed from top to bottom, allowing a certain offset error. The horizontal steel bars 320 in the horizontal direction are at least 2, and the horizontal steel bars 321 are also There are at least two, and they are arranged in the shape of a "well" on the periphery or the inner periphery of the vertical steel bars 322, and are vertically bound with the vertical steel bars 322 respectively.

Preferably, the size of the reinforcement cage 32 satisfies the following relationship:

x=(1/3～1/2)t1;

y=(1/3～1/2)t2;

z=min(a,b);

L1=t1-2tp1-(10～20)mm;

L2=t2-2tp2-(10～20)mm;

Among them, t1: the thickness of the first steel plate concrete structure wall 10;

t2: 20 thickness of the second steel plate concrete structure wall;

tp1: the thickness of steel plate 1a or 1b on one side of the first steel plate concrete structure wall, usually, the thickness of 1a and 1b is equal;

tp2: the thickness of the steel plate 2a or 2b on one side of the second steel plate concrete structure wall, usually, the thickness of 2a and 2b is equal;

x: horizontal spacing of steel bar 321;

y: Horizontal steel bar 320 transverse spacing;

z: vertical spacing of horizontal reinforcement 320/321, min(x,y) means the smaller value of x and y;

L1: 320 length of horizontal reinforcement;

L2: length of horizontal steel bar 321;

h: the length of the vertical steel bar 322, and the length is equal to the height of the reinforced structure of the intersection connection node of the steel plate concrete structure wall.

Preferably, the cross-section of the four vertically arranged vertical steel bars 322 is a square when viewed from top to bottom, so that the distances between two adjacent vertically arranged vertical steel bars 322 are equal, and the horizontal steel bars 320, 321 arranged in the shape of a "well" Bind vertically on the vertical reinforcing bars 322 equidistantly in the vertical direction.

Please refer to FIG. 4 , the reinforcement cage 32 is located in the middle of the node core area 30 , so that the distance between the reinforcement cage 32 and the sides of the node core area 30 is equal. The reinforcement cage 32 can be installed in the node core area 30 after the steel structure module prefabrication site is fabricated, and can also be placed on the construction site after the steel structure modules are assembled and hoisted in place and before pouring concrete. In order to simplify the construction difficulty, the horizontal reinforcing bars 320, 321 arranged in the horizontal direction do not need to be welded with the surrounding steel plates 1a, 1b, 2a, 2b.

Please continue to refer to Fig. 1, which is a schematic diagram of the first embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the reinforcement cage 32 is installed after the node core area 30, and the extension line of the horizontal steel bar 320 arranged in the horizontal direction Set vertically to the steel plates 1a and 1b at both ends of the location of the node core area 30, the extension line of the horizontal steel bar 321 is set vertically to the steel plates 2a and 2b at both ends, and there is a gap of 5 mm to 10 mm between the horizontal steel bars 320 and 321 and the steel plates at both ends, so that the The reinforcement cage 32 is smoothly hoisted in the node core area 30 and can effectively transmit the shear force of the node core area 30 .

Please continue to refer to Figure 2, which is a schematic diagram of the second embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the second embodiment is similar to the first embodiment, the difference is that in the first On the basis of the first embodiment, the reinforcement cage 32 is rotated 30° to 60° clockwise, and in the illustrated embodiment, it is rotated 45° clockwise, so that the extension line of the horizontal reinforcement 320 is aligned with the steel plates 1a, 2b at both ends Or the angle between the steel plates 2a and 1b is 45°, the angle between the extension line of the horizontal steel bar 321 and the steel plates 1a, 2a or steel plates 1b, 2b at both ends is 45°, and there is 5mm~ The gap of 10mm is convenient for hoisting the reinforcement cage 32 in the joint core area 30 smoothly, and can effectively transmit the shear force of the joint core area 30.

The length of the vertical steel bars 322 in the vertical direction of the reinforcement cage 32 is consistent with the heights of the surrounding steel plates 1a, 1b, 2a, 2b, and is also equal to the height of the reinforced structure of the intersection connection node of the entire steel plate concrete structure wall. In other embodiments, It can be slightly smaller than the height of the surrounding steel plates 1a, 1b, 2a, 2b, and the height difference is not more than 20mm.

Further preferably, a horizontal steel bar (not shown) in the horizontal direction and a vertical steel bar 322 in the vertical direction can also be arranged on the diagonal of the "well" shape for binding, so as to strengthen the strength of the entire reinforcement cage 32 .

Further preferably, horizontal steel bars 320, 321 are bound at the bottom of the vertical steel bars 322 in a "well" shape, and there is a protective layer thickness between the horizontal steel bars 320, 321 and the ground, which facilitates certain support and fixation.

It should be noted that the diameters of the horizontal steel bars 320, 321 in the horizontal direction and the vertical steel bars 322 in the vertical direction in the reinforcement cage 32 are 10 mm to 40 mm, and their sizes can also be selected according to actual needs, and the distance between adjacent steel bars can also be set. It can be adjusted according to the actual situation.

Please refer to Figure 7, which is a schematic diagram of the third embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the embodiment is basically the same as the first embodiment, the difference is that the structure of the third embodiment is T-shaped junction form. Due to space limitations, the introduction will not be repeated.

Please refer to Figure 8, which is a schematic diagram of the fourth embodiment of the steel plate concrete structure wall intersection connection node reinforcement structure of the present invention, the embodiment is basically the same as the first embodiment, the difference is that the structure of the fourth embodiment is Cross-shaped intersection form. Due to space limitations, the introduction will not be repeated.

It needs to be further explained that although the present invention has only been described in detail with the intersection connection node reinforcement structure of L-shaped steel plate concrete structure walls that meet vertically, other non-vertical L-shaped, T-shaped and cross-shaped steel plate concrete structure walls The setting method of the strengthening structure of the body intersection connection node is the same, and due to space limitations, the introduction will not be repeated.

Compared with the prior art, the steel plate concrete structure wall of the present invention can effectively transmit the shear force of the joint core area by taking reinforcement cage reinforcement measures in the joint core area. When the wall structure is stressed, the wall limb area is destroyed before the joint core area , realizing the complete strength connection of "strong nodes and weak components", improving the ductility and bearing capacity performance of the connecting nodes, and improving the safety performance of nuclear power plants.

According to the above principles, the present invention can also make appropriate changes and modifications to the above specific implementation methods. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims (10)

1. A steel plate concrete structure wall body of intersection connection node strengthening structure is characterized in that, comprises the first steel plate concrete structure wall body and the second steel plate concrete structure wall body of intersection connection, and the first steel plate concrete structure wall body comprises two The steel plates (1a, 1b) arranged side by side, concrete is poured between the two steel plates (1a, 1b), the second steel plate concrete structure wall includes two steel plates (2a, 2b) arranged side by side, and the two steel plates (2a, 1b) Concrete is poured between 2b), and the steel plates (1a, 1b) of the first steel plate concrete structure wall are respectively welded and connected with the steel plates (2a, 2b) of the second steel plate concrete structure wall, and form a wall surrounded by four steel plates In the core area of the node, a reinforcement cage is set in the core area of the node, and the reinforcement cage is poured in the core area of the node through concrete, and the steel plate in the core area of the node is also provided with studs. 2. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 1, characterized in that, the reinforcement cage includes a plurality of horizontal reinforcing bars arranged in the horizontal direction and vertical reinforcing bars arranged in the vertical direction, and is bound by binding forming. 3. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 2, characterized in that, the reinforcement cage includes at least 4 vertical reinforcements arranged in the vertical direction, and 4 vertical reinforcements arranged in the vertical direction The steel bars have a rectangular or square cross section, and the horizontal steel bars in the horizontal direction are vertically bound in the shape of a "well" with the vertical steel bars arranged in the vertical direction. 4. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 3, characterized in that, the size of the reinforcement cage satisfies the following relationship: x=(1/3～1/2)t1; y=(1/3～1/2)t2; z=min(x,y); L1=t1-2tp1-(10～20)mm; L2=t2-2tp2-(10～20)mm; Among them, t1: the wall thickness of the first steel plate concrete structure; t2: wall thickness of the second steel plate concrete structure; tp1: the thickness of the steel plate on one side of the wall of the first steel plate concrete structure; tp2: the thickness of the steel plate on one side of the second steel plate concrete structure wall; x, y: transverse spacing of horizontal reinforcement; z: vertical spacing of horizontal steel bars; L1, L2: length of horizontal reinforcement; h: length of vertical reinforcement. 5. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 4, characterized in that the extension line of the horizontal steel bar is vertically arranged with the steel plates at both ends. 6 . The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 4 , characterized in that the extension line of the horizontal steel bar and the steel plates at both ends are arranged at an angle of 30° to 60°. 7. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 4, characterized in that the length of the vertical reinforcement is equal to the height of the steel plate concrete structure wall intersection connection node reinforcement structure. 8. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 2, characterized in that, the length of the horizontal reinforcement is less than the size of the joint core area, and when the reinforcement cage is set, leave a space between the horizontal reinforcement and the steel plates at both ends. There is a gap of 5mm to 10mm. 9. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 2, characterized in that the diameters of the horizontal reinforcement bars and the vertical reinforcement bars are 10 mm to 40 mm. 10. The steel plate concrete structure wall intersection connection node reinforcement structure according to claim 1, characterized in that, the reinforcement cage is located in the middle of the node core area.