CN220035723U

CN220035723U - Be used for box girder steel and concrete beam node connection structure

Info

Publication number: CN220035723U
Application number: CN202321029603.5U
Authority: CN
Inventors: 朱岩; 李会军; 黄伟; 白治强; 蒋青桔
Original assignee: Shaanxi Huashan Road And Bridge Group Co ltd
Current assignee: Shaanxi Huashan Road And Bridge Group Co ltd
Priority date: 2023-05-04
Filing date: 2023-05-04
Publication date: 2023-11-17
Anticipated expiration: 2033-05-04

Abstract

The utility model provides a node connection structure for a box steel beam and a concrete beam, which comprises a concrete beam and profile steel embedded in the concrete steel beam; the box-shaped steel beam is embedded in the concrete beam and welded with the section steel, and the joint of the box-shaped steel beam and the concrete beam forms node connection; a cavity structure is formed between the box steel beam and the section steel, a blocking partition plate is arranged in the cavity structure, and a pouring cavity is formed by the blocking partition plate, the section steel and the box steel beam in the cavity structure; the pouring cavity is provided with a grouting hole, and the grouting hole is formed in the cover plate of the box-shaped steel beam; and the stiffening rib plate is welded at the joint of the section steel and the box steel beam and is used for connecting the section steel and the box steel beam. The utility model has simple structure and prefabricated connecting nodes. According to the utility model, through integral pouring of the node area, corrosion resistance and rust resistance are effectively realized, and the bending resistance, torsional strength and deformation performance of the connecting node are well ensured.

Description

Be used for box girder steel and concrete beam node connection structure

Technical Field

The utility model relates to the technical field of steel structure installation construction, in particular to a joint connection structure for box steel beams and concrete beams.

Background

The box-shaped steel beam has the advantages of light weight, high rigidity, attractive appearance, steel saving, rapid installation and strong rust resistance, and is widely applied to large-span steel structures, municipal high frames and bridge engineering. When the frame structure steel beams bear larger loads or span, box sections are also commonly used. The connection of the box steel beam and the concrete beam is generally used for parts with complex stress, sensitive load and high rigidity requirement, such as special-shaped structures, for example, the connection of a large-span steel stair and a concrete platform, the connection of a large-span steel structure roof and a concrete main structure, and the like.

At present, an embedded part is arranged on the side of a concrete beam and is connected with the box-shaped steel beam, the box-shaped steel beam is connected to the embedded part through a high-strength bolt or a welding mode, the connection mode is simple in construction, the welding quality is difficult to control, the stress of a bolt connection part is complex, and therefore the structural integrity and the anti-seismic performance are poor, and great potential safety hazards exist.

Disclosure of Invention

The utility model aims to provide a node connecting structure for a box steel beam and a concrete beam, which improves the strength of the whole node connecting structure and improves the safety through an added pouring cavity and a stiffening rib plate.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

is used for the joint connection structure of the box steel beam and the concrete beam, and comprises,

the concrete beam is used for the concrete beam,

section steel pre-buried in the concrete beam;

the box-shaped steel beam is embedded in the concrete beam and welded with the section steel, and the joint of the box-shaped steel beam and the concrete beam forms node connection;

a cavity structure is formed between the box steel beam and the section steel, a blocking partition plate is arranged in the cavity structure, and a pouring cavity is formed by the blocking partition plate, the section steel and the box steel beam in the cavity structure;

the pouring cavity is provided with a grouting hole, and the grouting hole is formed in the cover plate of the box-shaped steel beam;

the stiffening rib plate is welded at the joint of the section steel and the box steel beam and is used for connecting the section steel and the box steel beam.

As a further improvement of the present utility model, the section steel forms an assembly groove, and the box girder is partially placed in the assembly groove and welded to an inner wall of the assembly groove. Because the section steel is provided with the assembly groove, the casting cavity can be conveniently separated in the assembly groove later.

As a further improvement of the utility model, the section steel is I-steel, and the box steel beam is arranged at two sides or one side of the I-steel. In the technical scheme, although the I-steel is provided with two assembly grooves, all the connecting nodes do not need to be assembled with box steel beams at two sides, and the I-steel can be actually adjusted according to design requirements and stress forms. If one side is overhanging, the box type connecting section is required to be enlarged, the box type steel beam web plate can be made into a variable section, and the variable section is welded with the four sides of the lower flange of the I-steel in a surrounding way.

As a further improvement of the utility model, a stiffening rib plate is arranged at the joint and the suspension of the section steel and the box steel beam. The cross section of the stiffening rib plate is quadrilateral or right triangle. When the structure is quadrilateral, the structure is a vertical stiffening rib plate which is vertically arranged; and when the cross-linked rib plate is a right triangle, the cross-linked rib plate is a transverse stiffening rib plate which is transversely arranged. When the rib plate is transversely stiffened, the right-angle sides of the right-angle triangle are welded on the I-steel and the box steel beam respectively, and are partially exposed out of the assembly groove.

As a further improvement of the utility model, the box steel beam comprises a web plate, and the longitudinal stiffening rib plates are arranged along the vertical extending direction of the web plate and are positioned at the suspending position where the box steel beam is connected with the I-steel. In the technical scheme, a longitudinal stiffening rib plate is arranged between a box steel beam bottom plate and an I-steel lower flange, so that the height of webs at two sides of the box steel beam is extended downwards, the height of the webs is consistent with that of an assembly groove, the supporting effect is enhanced, and the local strength and the stability are increased.

As a further improvement of the utility model, when the box steel beam is arranged on the I-steel at one side, the web plate and the bottom plate of the box steel beam extend into the assembly groove through the extending surfaces which are obliquely arranged. In this technical scheme, the slope sets up to make its cross section have high variability, and then makes the assembly inslot be filled as far as possible. The other side of the I-steel is provided with a longitudinal stiffening rib plate which is as high as the assembly groove and as thick as the box steel beam web along the horizontal extension direction of the box steel beam web.

As a further improvement of the utility model, the blocking baffle plate and the grouting holes are respectively positioned outside the concrete beam, and the grouting holes are positioned between the blocking baffle plate and the I-steel or between the two blocking baffle plates. In this technical scheme, the grout hole sets up in the concrete beam outside, is convenient for to grout in the cavity.

As a further improvement of the utility model, the distance between the plugging baffle and the profile steel is 300-500mm, and the diameter of the grouting hole is 50-100 mm.

As a further improvement of the utility model, along the length direction of the concrete beam, the box beam is embedded in the concrete beam in a vertical direction and is partially exposed.

The beneficial effects of the utility model are as follows:

compared with the traditional node connection mode, the assembled connection node has the advantages of low carbon, environment friendliness, convenience in installation, short construction period and the like. Therefore, a novel box steel beam and concrete beam rigid connection node which is safe, efficient and excellent in performance is generated.

The utility model has simple structure, prefabricated connecting node structure form and convenient site construction; meanwhile, the bending strength and the torsional strength of the node can be improved by the box section, the grouting of the cavity of the box steel beam can effectively prevent corrosion and rust, and the durability, the bearing capacity and the integrity of the concrete beam are improved. The outer end of the embedded box steel beam connecting section can be spliced and connected with the field box steel beam section, so that the installation is convenient, and the construction period is effectively shortened.

Drawings

Fig. 1 is a schematic structural view of a joint connection structure for a box girder and a concrete girder according to the present utility model;

fig. 2 is a top view of a joint connection structure for a box girder and a concrete girder according to the present utility model;

FIG. 3 is a top view of the single side assembled box girder provided by the present utility model;

fig. 4 is a schematic structural diagram of a joint between a box steel beam and a concrete beam according to the present utility model;

FIG. 5 is a second schematic view of the junction between the box girder and the concrete girder according to the present utility model;

in the figure:

1. a concrete beam; 2. section steel; 3. the box steel beam; 4. plugging the baffle; 5. grouting holes; 6. and (5) stiffening rib plates.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-5, the joint connection structure for box steel beams and concrete beams in the embodiment belongs to the technical field of steel structure installation. The whole structure is composed of a concrete beam 1, a section steel 2 formed by an I-shaped steel, a box-shaped steel beam 3, a plugging partition plate 4, grouting holes 5 and stiffening rib plates 6. In actual connection, I-shaped steel and box girder steel 3 welded connection, wholly pre-buried in concrete beam 1, box girder steel 3's the other end extends to concrete beam 1 outside. The inside of the box girder 3 is provided with blocking baffle plates 4 at a certain position away from the I-shaped steel rib web plates, grouting holes 5 are respectively formed in cover plates of the box girder 3, and the grouting holes 5 are positioned between the two blocking baffle plates 4 and outside the concrete girder 1. In construction, concrete is poured in situ, and grouting and sealing are carried out after fine stone concrete with the same mark is poured into the cavity of the box steel beam 3 through the grouting holes 5. The utility model has simple structure, prefabricated connecting nodes and convenient site construction. Through the integral pouring of the node area, the anti-corrosion and anti-rust performance are effectively realized, and the bending resistance, the torsional strength and the deformation performance of the connecting node are well ensured. The outer end of the embedded box steel beam connecting section can be spliced and connected with the field box steel beam section, so that the installation is convenient, safe and efficient, and the performance is excellent. According to the utility model, through the additional pouring cavity, the rigid connection of the box steel beam and the concrete beam connection node is ensured, and the bending strength and the torsional strength of the node can be improved. The box girder cavity grout can effectively prevent corrosion, rust-resistant, guarantees the wholeness and the security of concrete beam and box girder steel junction better. The utility model has simple structure and convenient installation, the outer end of the embedded box steel beam connecting section can be spliced and connected with the field box steel beam section, the installation is convenient, and the construction period is effectively shortened. The concrete beam is well guaranteed to be integrated with the box beam connection node and the safety, the outer end of the prefabricated box beam connection section is connected with the box steel beam, the construction site box steel beam is connected, the structure is simple, the installation is convenient, the connection node is high in strength, large in rigidity, small in deformation, fatigue-resistant and difficult to loosen.

Referring to fig. 1-2, a node connection structure for a box girder and a concrete girder in this embodiment includes: the concrete beam 1, the section steel 2 formed by the I-shaped steel bones, the box-shaped steel beam 3, the plugging partition plate 4, the grouting holes 5 and the stiffening rib plates 6. During assembly, one end of the box steel beam 3 is welded to the side face of the web plate of the I-steel, and the other end of the box steel beam extends to the outside of the concrete beam 1. The box girder 3 may be provided on one side or on both sides. The box girder 3 sets up the cavity with the link of concrete beam 1, and the cavity is interior to be located apart from I-steel web certain distance, and two sides set up shutoff baffle 4. And grouting holes 5 are symmetrically formed in the cover plate of the box steel beam 3 at two sides between the two plugging partition plates 4, and the box steel beam 3 and the web plate of the I-steel are welded and fixed through stiffening rib plates 6.

In this embodiment, the section steel 2 forms an assembly groove, and the box steel beam 3 is partially disposed in the assembly groove and welded with the assembly groove. Because the section steel is provided with the assembly groove, the casting cavity can be conveniently separated in the assembly groove later.

In actual construction, in order to save steel, lay convenience etc., shaped steel 2 is the I-steel, box girder steel 3 set up in both sides or one side of I-steel. The I-steel is provided with two assembly grooves, but not all connecting joints need to be assembled with box steel beams on two sides, and the I-steel can be practically adjusted according to design requirements and stress forms. If one side is overhanging, the box type connecting section is required to be enlarged, the box type steel beam web plate can be made into a variable section, and the variable section is welded with the four sides of the lower flange of the I-steel in a surrounding way. The other side of the I-steel is provided with a stiffening rib plate which is as thick as the box steel beam web plate and is as high as the assembly groove along the extending direction of the box steel beam web plate, and the stiffening rib plate is vertical.

In order to ensure the firmness of connection and improve the local stability of the web, a longitudinal stiffening rib plate is arranged between the bottom plate of the box steel beam 3 and the lower flange of the I-steel, and the stiffening rib plates 6 are vertically arranged along the extending directions of the webs at the two sides of the box steel beam 3. The arrangement of the longitudinal stiffening ribs increases structural support at the suspended position in the connection of the box steel beam and the I-steel, so that the web plates at two sides of the box steel beam extend downwards to be consistent with the height of the assembly groove, and the strength and the stability are improved.

Referring to fig. 3, in construction, when the box girder 3 is disposed on the i-steel at one side, the web plate and the bottom plate of the box girder 3 extend into the assembly groove through the inclined extending surfaces. In this embodiment, the inclined arrangement makes the cross section highly variable, thereby making the fitting groove as filled as possible. Specifically, when the box girder 3 is assembled on one side, the web plate and the bottom plate of the box girder 3 extend to the inlet of the assembly groove towards the lower flange of the I-steel with a certain gradient, a casting cavity with a variable cross section is formed with the I-steel, and the inclination of the bottom plate of the box girder 3 is not more than 1:2.5. in the embodiment, the contact area of the connecting node is increased, the volume of concrete in the pouring cavity is increased, the stress performance is further enhanced, and the rigidity and the integrity of the node are ensured.

Further, the blocking partition plates 4 and the grouting holes 5 are respectively positioned outside the concrete beam 1, and the grouting holes 5 are positioned between the blocking partition plates 4 and the section steel 2 or between the two blocking partition plates 4. And meanwhile, pouring fine stone concrete with the same mark number into the pouring cavity through the grouting holes so as to ensure better bonding strength and structural integrity. When the box-shaped steel beam is arranged on one side, the grouting holes are positioned between the section steel 2 and the plugging partition plates 4 to form a pouring cavity; when the box steel beams 3 are arranged on two sides, pouring cavities are respectively formed in the assembly grooves on the left side and the right side, a grouting hole 5 is formed in each pouring cavity, and pouring is conducted on two sides.

In practical application, the cross section size, the steel strength grade and the like of the I-shaped steel rib and the box steel beam 3 are determined according to the structural bearing capacity, the working environment category and the structural durability requirement.

In this embodiment, when box girder steel 3 and shaped steel 2 are assembled, the apron and the top flange parallel and level of I-steel with box girder steel 3 are connected to satisfy the demand that the floor is in same elevation, web, the bottom plate and the I-steel web of box girder steel 3 are connected perpendicularly. The other end of the box steel beam 3 extends to the outside of the concrete beam 1, and then can be spliced with other box steel beam sections on site.

In construction, the sealing partition plates 4 are respectively arranged in the hollow cavity of the box-shaped steel beam 3 at the position 300-500mm away from the center of the web plate of the section steel 2 formed by the I-shaped steel ribs.

The box girder 3 cover plates are respectively provided with grouting holes 5, the grouting holes 5 are positioned between the plugging partition plates 4 and outside the concrete girder 1, the diameter of the grouting holes is 50-100mm, and the strength grade of the poured concrete is the same as that of the concrete girder.

In practical construction, the number of the box steel beams 3 is several, such as 1, 2, 3, or even more. And a plurality of box steel beams 3 are distributed on the section steel 2 according to construction scenes, design strength requirements and the like.

In order to match the casting cavity with proper height, the height of the cross section of the box steel beam 3 changes along with the height of the assembly groove in the section steel 2. For example, the load is larger, the height of the box steel beam 3 can be adjusted, and the bearing capacity and torsional rigidity are improved.

Specifically, a transverse stiffening rib plate 6 is arranged between the I-shaped steel 2 and the box-shaped steel beam 3, so that the connection between the I-shaped steel 2 and the box-shaped steel beam is firmer. Specifically, the stiffening rib plates 6 comprise transverse stiffening rib plates and longitudinal stiffening rib plates, and are respectively arranged at the connection part and the suspension part of the section steel and the box steel beam so as to improve the local stability of the web plate.

The technical scheme in this embodiment may be applied, for example, as follows:

the main hall of a theater is of a large-span complex steel structure, and the main body structure is of a cast-in-situ reinforced concrete frame-shear wall structure. The hall is provided with a high jump layer frame column, the floor span of the spectator hall is large, the load is loaded, and the plane is irregular. The light and attractive building shape is considered, and a steel structure rotary stair is arranged at the entrance of the hall. One end of a layer of rotary steel ladder is fixedly connected to the top plate of the basement, and the other end is overhanging on the steel reinforced concrete beam. Both ends of the two layers are overhanging on the steel reinforced concrete beam. The ladder beams at two sides adopt box sections, stiffening steel beams are arranged between the ladder beams along the ascending section interval of the rotary stair, and vertical loads and space bending torque are jointly born through the box steel beams and the stiffening steel beams. At this moment, the concrete beam and box girder connection mode that this embodiment provided is applied in the junction of steel ladder and major structure encorbelments, can effectively improve connected node intensity and rigidity, control structure deflection and comfort level, practice thrift the steel consumption, improve the safe deposit of structure.

The node connection structure for the box steel beam and the concrete beam, which is applied to the utility model, comprises the following concrete construction steps:

step 1: prefabricating a box steel beam 3 in a factory, butt-welding the I-shaped steel 2 and the box steel beam 3, welding a plugging partition plate 4 in the box steel beam 3, and welding a stiffening rib plate 6 between the I-shaped steel 2 and the box steel beam 3;

step 2: carrying out batch transportation on prefabricated steel structure connection nodes to a construction site, supporting a formwork to pour concrete after field installation is completed, and simultaneously pouring fine stone concrete with the same mark as the beam into a cavity of the box steel beam 3 from a grouting hole 4, wherein the outer end of the box steel beam 3 extends to the outside of the concrete beam; in this embodiment, at least one grouting hole is provided in each casting cavity.

Step 3: after the steel reinforced concrete structure reaches the design strength, the outer ends of the box steel beams to be spliced and the box steel beams 3 are welded or connected and fixed through a full penetration welding process on site.

In construction, the joint position of the box steel beam is prevented from being arranged in a node connection area, a bending moment and a shearing force larger area (the span is 1/3).

In this embodiment, in order to ensure the stability and torsion resistance of the connection node, the stiffening rib plate transversely arranged in the right triangle is selected, the right angle can enable the box steel beam 3 to be connected with the section steel junction of the I-steel, then the connection is supported and reinforced through the hypotenuse, and the right triangle is partially exposed and arranged, so that the whole reinforcing force extends to the outer side of the section steel, a part of section steel is added between the poured concrete beam 1 and the box steel beam 3, and the strength of the node is further increased.

Preferably, the spacing between the blocking baffle and the profile steel is 300-500 mm. If the length of the pouring cavity is too short, the grouting holes 4 are formed in the concrete beam 1, so that grouting into the box steel beam 3 is inconvenient, and the connection strength of the I-steel and the box steel beam is insufficient; if the casting solution is too long, the compactness and the grouting quality cannot be ensured because the casting solution is cast at will. And the steel beam is overweight after grouting, so that the bearing capacity and the integrity of the node are reduced, and deformation and fracture of the contact part of the concrete beam are easily caused.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The joint connection structure for the box steel beam and the concrete beam is characterized by comprising,

the concrete beam is used for the concrete beam,

section steel pre-buried in the concrete beam;

2. The joint connection structure for box girder and concrete girder according to claim 1, wherein the section steel forms an assembly groove, and the box girder is partially disposed in the assembly groove and welded to an inner wall of the assembly groove.

3. The joint connection structure for a box girder and a concrete girder according to claim 2, wherein the section steel is an i-beam, and the box girder is disposed at both sides or one side of the i-beam.

4. The joint connection for box girder and concrete girder of claim 3, wherein the box girder comprises a web, the stiffening rib is disposed along an extension direction of the web, and the stiffening rib is disposed between a bottom plate of the box girder and a lower flange of the i-beam.

5. The joint connection structure for box girder steel and concrete girder according to claim 4, wherein when the box girder steel is unilaterally disposed on the i-beam, the web plate and the bottom plate of the box girder steel extend into the assembly groove through an extending surface which is obliquely disposed.

6. A joint connection structure for box girder and concrete girder according to claim 3, wherein the blocking partition plate and the grouting hole are respectively located outside the concrete girder, and the grouting hole is located between the blocking partition plate and i-steel or between two blocking partition plates.

7. The joint connection for box girder and concrete girder of claim 6, wherein the cross section of the stiffening rib plate is a quadrangle or a right triangle.

8. The joint connection structure for box girder and concrete girder according to claim 1, wherein the distance between the blocking partition plate and the section steel is 300mm-500mm, and the diameter of the grouting hole is 50mm-100mm.

9. The joint connection structure for box girder steel and concrete girder according to claim 8, wherein the box girder steel is embedded in the concrete girder in a vertical direction along a length direction of the concrete girder and is partially exposed.