阅读说明：本技术 钢梁的连接结构、钢-混凝土叠合板组合梁及施工方法 (Steel beam connecting structure, steel-concrete composite slab beam and construction method ) 是由 杨悦 于 2021-05-21 设计创作，主要内容包括：本发明提供的一种钢梁的连接结构、钢-混凝土叠合板组合梁及施工方法,属于建筑结构技术领域,钢梁的连接结构包括：连接盖板,连接在纵向相邻两个钢梁上翼缘的连接位置；放置部,设置在所述连接盖板的一侧边；所述放置部适于放置预制混凝土板；固定连接件,用于固定连接盖板和钢梁上翼缘；本发明的钢梁的连接结构,在钢梁上翼缘的连接盖板的一侧边设置有用于放置预制混凝土板的放置部,使得在钢梁接缝处不会出现高低不平的情况,也能直接放置预制混凝土板,简化施工过程。(The invention provides a connecting structure of steel beams, a steel-concrete composite slab beam and a construction method, belonging to the technical field of building structures, wherein the connecting structure of the steel beams comprises the following components: the connecting cover plate is connected to the connecting position of the flanges on the two longitudinally adjacent steel beams; the placing part is arranged on one side of the connecting cover plate; the placing part is suitable for placing precast concrete plates; the fixed connecting piece is used for fixedly connecting the cover plate and the steel beam upper flange; according to the connecting structure of the steel beam, the placing part for placing the precast concrete plate is arranged on one side of the connecting cover plate of the upper flange of the steel beam, so that the precast concrete plate can be directly placed on the joint of the steel beam without unevenness, and the construction process is simplified.)

1. Connection structure of girder steel, its characterized in that includes:

the connecting cover plate (2) is connected to the connecting position of the upper flanges of the two longitudinally adjacent steel beams (1);

a placing part (4) arranged at one side of the connecting cover plate (2); the placing part (4) is suitable for placing a precast concrete plate (9);

and the fixed connecting piece (3) is used for fixedly connecting the upper flange of the cover plate (2) and the upper flange of the steel beam (1).

2. The steel beam connection structure according to claim 1, wherein the width of the connection cover plate (2) is smaller than the width of the upper flange of the steel beam (1); the placing part (4) is an area where the edge of the connecting cover plate (2) reaches the edge of the upper flange of the steel beam (1).

3. The connecting structure of the steel beam according to claim 1, wherein a first mounting hole is formed on the connecting cover plate (2), and a second mounting hole corresponding to the first mounting hole is formed on the upper flange of the steel beam (1);

one end of the fixed connecting piece (3) penetrates through the first mounting hole and the second mounting hole, and the other end of the fixed connecting piece extends out of the first mounting hole.

4. The connection of steel beams according to claim 3, wherein the fixed connection (3) comprises:

one end of the connecting screw rod (5) is arranged in the first mounting hole and the second mounting hole in a penetrating mode, and the other end of the connecting screw rod is an extending end (6) extending towards the direction far away from the steel beam (1);

a fixing nut (7) having at least two; the upper part and the lower part of the connecting screw rod (5) are screwed respectively, and the upper flange of the steel beam (1) and the connecting cover plate (2) are clamped;

an additional nut (8) screwed on top of the extended end (6) of the connecting screw (5).

5. A steel-concrete composite slab composite beam, comprising:

the steel beam group is provided with a plurality of groups which are arranged at intervals; each group of steel beam groups is provided with at least two steel beams (1) connected along the longitudinal direction; connecting two steel beams (1) which are longitudinally adjacent in each group of steel beams by using the steel beam connecting structure of any one of claims 1 to 4;

the precast concrete plates (9) are covered between the two steel beam groups; two ends of the precast concrete plate (9) are respectively lapped on the placing parts (4) of the two groups of steel beam groups;

and a concrete slab (10) is poured and is arranged above the steel beam group and the precast concrete slab (9).

6. The steel-concrete composite slab according to claim 5, further comprising:

a plurality of shear connectors (11); one end of the shear connector (11) is connected with the upper flange of the steel beam (1), and the other end of the shear connector extends into the poured concrete slab (10).

7. The steel-concrete composite slab composite beam as claimed in claim 6, wherein the connection cover plate (2) is provided with a first mounting hole, and the upper flange of the steel beam (1) is provided with a second mounting hole corresponding to the first mounting hole;

one end of the fixed connecting piece (3) penetrates through the first mounting hole and the second mounting hole, and the other end of the fixed connecting piece extends out of the first mounting hole;

the length of the part of the fixed connecting piece (3) extending out of the first mounting hole is the same as that of the shear connecting piece (11).

8. A construction method is characterized by comprising the following steps:

s1, prefabricating a steel beam (1), a connecting cover plate (2) and a fixed connecting piece (3); the width of the connecting cover plate (2) is 10-20cm smaller than that of the upper flange of the steel beam (1);

s2, fixedly connecting the upper flange of the connecting cover plate (2) and the upper flange of the steel beam (1) through a fixed connecting piece (3), wherein the distance from the edges of the two sides of the connecting cover plate (2) to the edge of the upper flange of the steel beam (1) is 5-10 cm;

s3, longitudinal connection of a lower flange of the steel beam (1) and a web plate of the steel beam (1) is achieved by adopting a traditional bolt connection technology;

s4, covering the precast concrete plate (9) between two adjacent steel beam groups; and a pouring concrete plate (10) is arranged above the precast concrete plate (9) and the steel beam (1).

9. The construction method according to claim 8, wherein the shear connector (11) is installed at a position where the connection cover plate (2) is not provided on the upper flange of the steel girder (1) during the prefabrication of the steel girder (1).

10. The construction method according to claim 8, wherein, in the process of fixedly connecting the upper flanges of the connecting cover plate (2) and the steel beam (1) by the fixing connection member (3),

firstly, a connecting screw rod (5) is arranged in the first mounting hole and the second mounting hole in a penetrating way;

two fixing nuts (7) are screwed on the upper part and the lower part of the upper flange of the steel beam (1) of the connecting screw rod (5), and the upper flange of the steel beam (1) and the connecting cover plate (2) are clamped; an additional nut (8) is screwed on the extending end (6) of the connecting screw rod (5).

Technical Field

The invention relates to the technical field of building structures, in particular to a connecting structure of steel beams, a steel-concrete composite slab composite beam and a construction method.

Background

The steel-concrete composite beam is a novel structural type developed on the basis of steel structures and concrete structures. The shear connectors (studs, channel steels, bent ribs and the like) are arranged between the steel beam and the concrete flange to resist the lifting and relative sliding of the steel beam and the concrete flange at an interface, so that the steel beam and the concrete flange are integrated and work together.

The steel-concrete composite slab is one of the steel-concrete composite slabs, and the composite slab is an assembled integral floor slab formed by overlapping a precast concrete slab and a poured concrete slab layer;

in the longitudinal connection process of adjacent girder steel, adopt the longitudinal connection who realizes the girder steel with the connection apron of girder steel isopachous, because connection apron has thickness, lead to the surface of girder steel in vertical seam crossing height not level for precast concrete board can't directly place, brings the difficulty for the construction.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that the surface of the steel beam is uneven at the longitudinal joint due to the arrangement of the connecting cover plate in the prior art, so that the precast concrete plate cannot be directly placed, and the construction is difficult, thereby providing a connecting structure of the steel beam.

The invention also provides a steel-concrete composite slab beam.

The invention also provides a construction method.

In order to solve the above technical problems, the present invention provides a connection structure of a steel beam, including:

the connecting cover plate is connected to the connecting position of the flanges on the two longitudinally adjacent steel beams;

the placing part is arranged on one side of the connecting cover plate; the placing part is suitable for placing precast concrete plates;

and the fixed connecting piece is used for fixedly connecting the upper flange of the cover plate and the upper flange of the steel beam.

Preferably, the width of the connecting cover plate is smaller than that of the upper flange of the steel beam; the placing part is an area where the edge of the connecting cover plate reaches the edge of the upper flange of the steel beam.

As a preferred scheme, a first mounting hole is formed in the connecting cover plate, and a second mounting hole corresponding to the first mounting hole is formed in the upper flange of the steel beam;

one end of the fixed connecting piece penetrates through the first mounting hole and the second mounting hole, and the other end of the fixed connecting piece extends out of the first mounting hole.

Preferably, the fixing connector includes:

one end of the connecting screw rod penetrates through the first mounting hole and the second mounting hole, and the other end of the connecting screw rod is an extending end extending towards the direction far away from the steel beam;

the fixing nuts are at least provided with two fixing nuts; the upper flange and the connecting cover plate are respectively screwed on the upper part and the lower part of the connecting screw rod to clamp the upper flange of the steel beam;

an additional nut screwed on top of the extended end of the connection screw.

The present invention also provides a steel-concrete composite slab beam, comprising:

the steel beam group is provided with a plurality of groups which are arranged at intervals; each steel beam group is provided with at least two steel beams which are connected along the longitudinal direction; two longitudinally adjacent steel beams in each group of steel beam groups are connected by adopting the connecting structure of the steel beams;

the precast concrete plates are covered between the two steel beam groups; two ends of the precast concrete plate are respectively lapped on the placing parts of the two groups of steel beam groups;

and pouring a concrete slab, and arranging the concrete slab above the steel beam group and the precast concrete slab.

Preferably, the method further comprises the following steps:

a plurality of shear connectors; one end of the shear connector is connected with the upper flange of the steel beam, and the other end of the shear connector extends into the poured concrete slab.

As a preferred scheme, a first mounting hole is formed in the connecting cover plate, and a second mounting hole corresponding to the first mounting hole is formed in the upper flange of the steel beam;

one end of the fixed connecting piece penetrates through the first mounting hole and the second mounting hole, and the other end of the fixed connecting piece extends out of the first mounting hole;

the length of the part of the fixed connecting piece extending out of the first mounting hole is the same as that of the shear connecting piece.

Preferably, the area of the connecting cover plate is larger than or equal to the area required by the fixed connecting piece; the number of the connecting fixing pieces is determined according to the connecting stress between the adjacent steel beams.

The invention also provides a construction method, which comprises the following steps:

s1, prefabricating a steel beam, a connecting cover plate and a fixed connecting piece; the width of the connecting cover plate is 10-20cm smaller than that of the upper flange of the steel beam;

s2, fixedly connecting the connecting cover plate with the upper flange of the steel beam through a fixed connecting piece, wherein the distance from the two side edges of the connecting cover plate to the upper flange edge of the steel beam is 5-10 cm;

s3, longitudinal connection of a lower flange of the steel beam and a web plate of the steel beam is achieved by adopting a traditional bolt connection technology;

s4, covering the precast concrete plate between two adjacent steel beam groups; and arranging a pouring concrete plate above the precast concrete plate and the steel beam.

Preferably, in the process of prefabricating the steel beam, a shear connecting piece is installed at a position on the upper flange of the steel beam, where the connecting cover plate is not arranged.

Preferably, in the process of fixedly connecting the upper flanges of the connecting cover plate and the steel beam through the fixed connecting piece,

firstly, a connecting screw rod is arranged in the first mounting hole and the second mounting hole in a penetrating way;

screwing two fixing nuts on the upper part and the lower part of the upper flange of the steel beam of the connecting screw rod to clamp the upper flange of the steel beam and the connecting cover plate; an additional nut is screwed on the extended end of the connecting screw.

The technical scheme of the invention has the following advantages:

1. the invention provides a connecting structure of steel beams, which comprises: the connecting cover plate, the placing part and the fixed connecting piece are connected; be provided with the portion of placing that is used for placing precast concrete board at a side of connecting the apron for the uneven condition of height can not appear in girder steel seam crossing, also can directly place precast concrete board, simplifies the work progress.

2. The invention provides a connecting structure of steel beams, which comprises a fixed connecting piece and a connecting piece, wherein the fixed connecting piece comprises: the connecting screw rod, the fixing nut and the additional nut are connected; the connecting screw rod and the fixing nut are arranged to realize the fixed connection between the steel beams; the connecting screw rod and the additional nut are matched to form the same effect as that of the shear connecting piece, so that the connecting force can be realized at the connecting cover plate, and the defect that the shear connecting piece cannot be arranged at the position is overcome.

3. The invention provides a connecting structure of steel beams, which further comprises: one end of the shear connecting piece is connected with the upper flange of the steel beam, and the other end of the shear connecting piece extends into the poured concrete slab; the arrangement of the shear connecting piece can improve the connecting force between the poured concrete and the steel beam, so that the whole building structure is firmer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic perspective view illustrating a steel-concrete composite slab according to the present invention.

FIG. 2 is a cross-sectional view of a longitudinal joint of a steel beam of the present invention.

Fig. 3 is a plan view of a steel-concrete composite girder according to the present invention.

FIG. 4 is a cross-sectional view of the longitudinal joint of the steel beam when the fixing connector of the present invention is additionally provided with the connecting screw and the additional nut.

Description of reference numerals:

1. a steel beam; 2. connecting the cover plate; 3. fixing the connecting piece; 4. a placement section; 5. connecting a screw rod; 6. an extension end; 7. fixing a nut; 8. an additional nut; 9. prefabricating a concrete slab; 10. pouring a concrete slab; 11. a shear connector; 12. a lower connecting plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

In the connection structure of the steel beam provided by this embodiment, as shown in fig. 1, in the use process, upper flanges of a plurality of steel beams 1 need to be sequentially connected along the longitudinal direction, two adjacent steel beams 1 are connected through a connection cover plate 2, and the connection cover plate 2 and the upper flanges of the steel beams 1 are fixedly connected through a fixed connecting part 3;

in the embodiment, the steel beam 1 is made of I-shaped steel, and the I-shaped steel is provided with flanges and a web plate;

as shown in fig. 2, a lower connecting plate 12 is arranged at the lower end of the upper flange of the steel beam, and the lower connecting plate 12 is matched with the connecting cover plate to realize the connection of the upper flanges of two adjacent steel beams; the width of the connecting cover plate 2 is smaller than that of the upper flange of the steel beam 1, and specifically, the width is 10-20cm smaller; placing parts 4 for placing precast concrete are respectively arranged on two sides of the connecting cover plate 2; the placing part 4 is a part of the upper surface of the upper flange of the steel beam 1, and is a region connecting the edge of the cover plate 2 to the edge of the upper flange of the steel beam 1; preferably, the connection cover plate 2 is disposed at a middle position in the width direction of the steel beam 1 such that the placement portions 4 at both sides of the connection cover plate 2 have the same area;

as shown in fig. 2, the sum of the net cross-sectional areas of the connecting cover plates 2 and all the lower connecting plates 12 at the joint of the steel beam 1 is not less than the cross-sectional area of the upper flange of the steel beam 1, so as to meet the force transmission requirement of the upper flange of the steel beam 1.

As shown in fig. 3, meanwhile, in order to ensure the connection force between two longitudinally adjacent steel beams 1, a sufficient number of fixing connectors 3 need to be arranged between the connecting cover plate 2 and the steel beams 1, and in order to meet the arrangement requirement of the fixing connectors 3, the length of the connecting cover plate 2 needs to be lengthened in the longitudinal direction;

when the steel beam upper flange is longitudinally connected, enough fixed connecting pieces are required to be screwed between the steel beam upper flange and the connecting cover plate at the connecting position to ensure the force transmission requirement, and if the number of the required fixed connecting pieces is N, the planar area of the required cover plate is A according to the planar arrangement requirement of the fixed connecting pieces, and further according to the cover plate width B determined by the method, the length L of the cover plate in the invention can be obtained: and L is A/B.

Specifically, as shown in fig. 2, a plurality of first mounting holes are formed in the connecting cover plate 2, second mounting holes corresponding to the first mounting holes are formed in the steel beam 1, third mounting holes are formed in the lower connecting plate 12, and the fixing connecting member 3 is a common bolt and a fixing nut 7; a common bolt penetrates through the first mounting hole, the second mounting hole and the third mounting hole, and a fixing nut 7 is screwed on to realize the fixed connection of the connecting cover plate 2, the upper flange of the steel beam 1 and the lower connecting plate 12;

as an alternative embodiment, as shown in fig. 4, a connecting screw 5 is inserted into the first, second and third mounting holes, one end of the connecting screw 5 is inserted into the first, second and third mounting holes, and the other end is an extending end 6 extending away from the upper flange of the steel beam 1; screwing a first fixing nut 7 below the connecting screw 5 extending out of the lower connecting plate 12, screwing a second fixing nut 7 above the connecting screw 5 extending out of the connecting cover plate 2, and matching the first fixing nut 7 and the second fixing nut 7 to realize the fixed connection of the connecting cover plate 2, the upper flange of the steel beam 1 and the lower connecting plate 12; the upper part of the connecting screw rod 5 extends towards the upper part of the upper flange of the steel beam 1, the extending part is an extending end 6, the end part of the extending end 6 is screwed with an additional nut 8, the extending end 6 and the additional nut 8 are suitable for being inserted into a cast concrete slab 10, and the cast concrete slab 10 and the steel beam 1 are fixed.

As an alternative embodiment, the connecting screw 5 in the fixed connecting member 3 may be a bolt, the head of the bolt is at the lower end of the upper flange of the steel beam 1, the bolt rod of the bolt sequentially passes through the third mounting hole, the second mounting hole and the first mounting hole from the lower end, and a fixing nut 7 is screwed above the connecting cover plate 2.

Example 2

The steel-concrete composite slab composite beam provided by the embodiment, as shown in fig. 3, includes: the concrete beam comprises a steel beam group, a precast concrete plate 9 and a poured concrete plate 10;

each combined beam is provided with a plurality of groups of steel beams 1, and the plurality of groups of steel beams 1 are arranged in parallel at intervals along the transverse direction; each group of steel beams 1 is provided with at least two steel beams 1 connected along the longitudinal direction, and two longitudinally adjacent steel beams 1 in each group of steel beams 1 are connected by adopting the connecting structure of the steel beams 1 in the embodiment 1;

cover between adjacent two sets of girder steel 1 groups and be equipped with precast concrete board 9, precast concrete board 9's both ends overlap joint respectively on placing portion 4, owing to the setting of placing portion 4 for the seam crossing of vertical adjacent girder steel 1 is the same with the height of the other positions of girder steel 1, and the condition that the height is different can not appear takes place, makes things convenient for placing of precast concrete board 9, simplifies the construction.

A cast concrete slab 10 is covered above the precast concrete slab 9 and the flange of the steel beam 1, in order to enhance the connecting force between the cast concrete slab 10 and the upper flange of the steel beam 1, a plurality of shear connectors 11 are arranged on the upper flange of the steel beam 1 at positions where the connecting cover plate 2 is not required to be arranged, and the structure of the shear connectors 11 is similar to that of the studs in the embodiment; one end of the shear connector 11 is connected with the upper surface of the upper flange of the steel beam 1, and the other end of the shear connector extends into the concrete slab; the steel beam 1 and the cast concrete slab 10 are fixed by a shear connector 11.

As shown in fig. 4, in the connection structure of two longitudinally adjacent steel beams 1, the length of the extending end 6 of the connecting screw rod 5 is the same as that of the shear connecting piece 11, and meanwhile, the product of the number of the connecting screw rods 5 and the sectional area of the connecting screw rod 5 is equal to the calculated number of the shear connecting pieces 11 required for force transmission at the position, so that the connection and stress of the steel beam 1 provided with the connecting cover plate 2 and the cast concrete slab 10 are ensured to meet the requirements, that is, the steel beam 1 at the joint is effectively connected with the cast concrete slab 10 at the upper part, and the defect that the force transmission does not meet the requirements without the shear connecting piece 11 is overcome.

Example 3

The construction method provided by the embodiment is used for producing the steel-concrete composite slab composite beam described in the embodiment 2, and comprises the following steps:

s1, prefabricating the steel beam 1, the connecting cover plate 2, the fixed connecting piece 3 and the lower connecting plate 12;

in the process of prefabricating the connecting cover plate 2, the width of the connecting cover plate 2 is 10-20cm smaller than that of the upper flange of the steel beam 1;

in the process of prefabricating the steel beam 1, a shear connector 11 is arranged at a position where the connecting cover plate 2 is not arranged; one end of the shear force connecting piece 11 is connected with the upper flange of the steel beam 1, and the other end extends upwards;

the production of the fixed connecting piece 3 comprises the production of a connecting screw rod 5 and the production of a fixed nut 7 and an additional nut 8 which are matched with the connecting screw rod 5; the length of the connecting screw 5 is the same as or slightly longer than the thickness of the connecting cover plate 2, the thickness of the flange of the steel beam 1, the thickness of the upper and lower connecting plates 12 and the length of the shear connecting piece 11.

S2, fixedly connecting a connecting cover plate 2 and a steel beam 1 through a fixed connecting piece 3, wherein the distance from the edges of the two sides of the connecting cover plate 2 to the edge of the steel beam 1 is 5-10 cm;

the connecting cover plate 2 is provided with first mounting holes, the steel beam 1 is provided with second mounting holes which are arranged correspondingly to the first mounting holes and have the same number, and the lower connecting plate is provided with third mounting holes;

the connecting screw rod 5 penetrates through the first mounting hole, the second mounting hole and the third mounting hole;

screwing a first fixing nut 7 at the lower end of the connecting screw rod 5 extending out of the lower connecting plate 12, and screwing a second fixing nut 7 at the upper end extending out of the connecting cover plate 2; an additional nut 8 is screwed on top of the extended end 6 of the connecting screw 5;

s3, longitudinal connection of the lower flange of the steel beam 1 and the web plate of the steel beam 1 is achieved by adopting a traditional bolt connection technology;

s4, covering the precast concrete plates 9 between two adjacent steel beam 1 groups; a cast concrete slab 10 is provided above the precast concrete slab 9 and the steel beam 1.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.