CN218779310U

CN218779310U - Girder steel and bridge

Info

Publication number: CN218779310U
Application number: CN202222761932.0U
Authority: CN
Inventors: 许为民; 李鲁; 姜宏丽; 汤虎; 张洪金; 侯守军; 周伟翔; 罗栋; 张宇; 张玲玲; 王宇锋
Original assignee: Jinan City Construction Group Co ltd; Shanghai Municipal Engineering Design Insitute Group Co Ltd
Current assignee: Jinan City Construction Group Co ltd; Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority date: 2022-10-17
Filing date: 2022-10-17
Publication date: 2023-03-31
Anticipated expiration: 2032-10-17

Abstract

The utility model discloses a girder steel and bridge relates to bridge construction technical field. The steel beam comprises a first web plate, a second web plate, a third web plate, a first flange, a second flange and a stiffening rib. The second web plate is arranged on the first web plate, the thickness of the first web plate is greater than that of the second web plate, and the first side of the first web plate and the first side of the second web plate are positioned on the same plane; and the stiffening ribs are arranged on the first side of the first web plate and the first side of the second web plate and are connected with the first web plate and the second web plate. This girder steel can guarantee the stability of girder steel and reduce the processing work volume and the cost of girder steel.

Description

Girder steel and bridge

Technical Field

The utility model relates to a bridge construction technical field especially relates to a girder steel and bridge.

Background

When the known bridge pushing construction is carried out, the pushing fulcrum has larger local acting force, and the steel beam can be subjected to the counterforce of the acting force during the construction and causes the instability of the steel beam. In the construction process, in order to avoid the instability of the steel beam, a large number of stiffening ribs are provided on the side walls of the web to improve the strength of the web, some stiffening ribs have a longer length, and some stiffening ribs have a shorter length, wherein a plurality of stiffening ribs with a short length need to be additionally provided. However, with the arrangement of a large number of stiffeners, the welding workload is significantly increased, and the material cost is also significantly increased.

Therefore, a steel beam and a bridge are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a girder steel and bridge can guarantee the stability of girder steel and reduce the processing work load and the cost of girder steel.

For realizing the above technical effect, the technical scheme of the utility model as follows:

a steel beam, comprising: a first web; the second web plate is arranged on the first web plate, the thickness of the first web plate is larger than that of the second web plate, and the first side of the first web plate and the first side of the second web plate are positioned on the same plane; the stiffening ribs are arranged on the first side of the first web plate and the first side of the second web plate and connected with the first web plate and the second web plate; the first flange is located the first web deviates from one side of second web, the first flange with first web with the stiffening rib is connected: the second edge of a wing, the second edge of a wing is located the second web deviates from one side of first web, the second edge of a wing with the second web with the stiffening rib is connected.

The steel beam further comprises a third web plate, the first web plate and the second web plate are connected through the third web plate, the thickness of two ends of the third web plate is respectively the same as that of the first web plate and that of the second web plate, and the thickness of the third web plate is gradually reduced in a direction departing from the first web plate.

Furthermore, the side of the third web plate, which faces away from the stiffening rib, is an inclined surface, and an included angle between the inclined surface and the first side of the first web plate is alpha, where alpha is greater than 0 and less than or equal to 18.44 °.

Further, the first web and the second web are welded.

Further, one end of the stiffening rib is flush with the end of the first web facing away from the second web, and the other end of the stiffening rib is flush with the end of the second web facing away from the first web.

Further, the first web plate and the second web plate are both made of steel.

A bridge, comprising: the aforementioned steel beam, a plurality of said steel beams constitute the main beam of said bridge.

Furthermore, the cross-section of girder is the I shape, and the stiffening rib is towards the longitudinal bridge of bridge is to central direction.

The utility model has the advantages that:

according to the utility model discloses a girder steel, first web and second web thickness are different, and the second web is located first web to first web can form stable support, and the less then can transmit reaction force to first web smoothly of second web thickness, no matter from the whole shape structure of girder steel or from the transmission of power, has all guaranteed the overall stability of girder steel. Simultaneously, because the first side of first web and the first side of second web are located the coplanar, and this side still additionally is equipped with the stiffening rib, therefore in coplanar, the stability of first web and second web can also be strengthened through the stiffening rib to the stability of shearing of girder steel has been showing to have improved. Therefore, the utility model discloses a different thickness's first web and the structure of second web, only need single stiffening rib can reach the enhancement effect of a plurality of stiffening ribs to the stability of girder steel in the known art, thereby under the prerequisite of guaranteeing the stability of girder steel in the work progress and construction safety, be showing the structure of having simplified the girder steel, the processing weldment work of a large amount of stiffening ribs has been reduced, the efficiency of construction has been improved, and the overall material demand of girder steel has been saved, construction cost is reduced, the girder steel no longer has the stiffening rib of dense numb simultaneously, the aesthetic property of bridge has also been improved.

According to the utility model discloses a bridge is owing to set up the girder steel that thickness is different to need not additionally to set up the stability that a plurality of stiffening ribs also can guarantee the girder steel atress.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of a steel beam according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a bridge according to an embodiment of the present invention.

Reference numerals

100. A steel beam; 200. a bridge; 201. a main beam; 10. a first web; 20. a second web; 30. a stiffening rib; 40. a third web; 41. a bevel; 50. a first flange; 60. a second flange.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

It is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

A specific structure of a steel beam 100 according to an embodiment of the present invention is described below with reference to fig. 1 and 2.

As shown in fig. 1, fig. 1 discloses a steel beam 100 comprising a first web 10, a second web 20 and stiffeners 30. The second web plate 20 is arranged on the first web plate 10, the thickness of the first web plate 10 is larger than that of the second web plate 20, and the first side of the first web plate 10 and the first side of the second web plate 20 are positioned on the same plane. Stiffeners 30 are provided on a first side of the first web 10 and a first side of the second web 20 and are connected to the first web 10 and the second web 20.

It can be understood that the first web 10 and the second web 20 of the present embodiment have different thicknesses, and the second web 20 is located on the first web 10, so that the first web 10 can form a stable support, and the smaller thickness of the second web 20 can smoothly transmit the reaction force to the first web 10, thereby ensuring the overall stability of the steel beam 100, both from the overall shape structure of the steel beam 100 and from the force transmission. Meanwhile, since the first side of the first web 10 and the first side of the second web 20 are located on the same plane, and a stiffening rib 30 is additionally provided on the first side, the stability of the first web 10 and the second web 20 can be further enhanced by the stiffening rib 30 at the same plane, thereby significantly improving the shear stability of the steel beam 100.

Therefore, in the present embodiment, through the structures of the first web 10 and the second web 20 with different thicknesses, the reinforcing effect of the plurality of stiffening ribs 30 on the stability of the steel beam 100 in the prior art can be achieved only by the single stiffening rib 30, so that on the premise of ensuring the stability and the construction safety of the steel beam 100 in the construction process, the structure of the steel beam 100 is significantly simplified, the processing and welding work of a large number of stiffening ribs 30 is reduced, the construction efficiency is improved, the overall material requirement of the steel beam 100 is saved, the construction cost is reduced, meanwhile, the steel beam 100 does not have the stiffening ribs 30 with dense hemp, and the aesthetic property of the bridge 200 is also improved.

The steel beam 100 also includes a first flange 50 and a second flange 60. A first flange 50 is provided on the side of the first web 10 facing away from the second web 20, the first flange 50 being connected to the first web 10 and the stiffener 30. A second flange 60 is provided on the side of the second web 20 facing away from the first web 10, the second flange 60 being connected to the second web 20 and the stiffener 30. The first flange 50 allows the girder 100 to be easily connected to other structures of the bridge 200 during construction, and the second flange 60 may further support the girder 100 and be connected to other structures.

In addition, the first web 10 and the second web 20 in this embodiment may be flat plates or corrugated plates, and the specific plate-shaped structure thereof may be determined according to actual construction requirements, which is not limited by the present invention.

In some embodiments, as shown in fig. 1, the steel beam 100 further comprises a third web 40, the first web 10 and the second web 20 are connected by the third web 40, the thickness of both ends of the third web 40 is the same as the thickness of the first web 10 and the second web 20, respectively, and the thickness of the third web 40 is gradually reduced in a direction away from the first web 10.

It can be understood that the third web 40 may play an excessive role in the connection between the first web 10 and the second web 20 to prevent the acting force from being smoothly transmitted from the second web 20 to the first web 10, thereby ensuring the smoothness of force transmission between the second web 20 and the first web 10, further ensuring the supporting stability of the steel beam 100, and improving the construction safety of the bridge 200.

In some embodiments, as shown in FIG. 1, the side of the third web 40 facing away from the stiffener 30 is a sloped surface 41, the sloped surface 41 forms an angle α with the first side of the first web 10, 0 < α ≦ 18.44.

It will be appreciated that when α is greater than 18.44 °, the transition of the third web 40 is steeper, making it difficult to achieve a good force transmission effect, and therefore, by limiting the value of α, the transition moderation of the third web 40 can be increased.

Specifically, in the present embodiment, the end of the second web plate 20 facing the first web plate 10 is chamfered to form the third web plate 40, so that the third web plate 40 of the present embodiment does not need to be additionally processed, and only needs to be formed on the second web plate 20, thereby reducing the processing difficulty of the steel beam 100.

In some embodiments, as shown in fig. 1, the first and

second webs

10, 20 are of unitary construction.

It should be noted that, in the present invention, the method for integrally forming the first web 10 and the second web 20 is various, for example, in some embodiments, the first web 10 is integrally formed on the second web 20 by using injection molding, compression molding, hot pressing, or other forming methods; for another example, in some embodiments, the first web 10 and the second web 20 are formed by an integral casting process. That is, in the present embodiment, the method in which the first web 10 and the second web 20 are formed as an integrally molded piece may be any integrally molding method. In the present embodiment, a structure in which the first and

second webs

10 and 20 are not detachable is emphasized, rather than a process in which the first and

second webs

10 and 20 are integrally molded. It will be appreciated that the integrally formed structure has better stability so that force can be more smoothly transferred from the second web 20 to the first web 10 to further improve the shear stability of the steel beam 100.

Specifically, the first web 10 and the second web 20 are welded by a butt weld in the present embodiment.

In some embodiments, as shown in fig. 1, one end of the stiffener 30 is flush with the end of the first web 10 facing away from the second web 20, and the other end of the stiffener 30 is flush with the end of the second web 20 facing away from the first web 10.

It can be understood that the stiffening ribs 30 can also serve as force transmission by limiting the length of the stiffening ribs 30, thereby further improving the shear stability of the steel beam 100.

In some embodiments, the first and

second web plates

10, 20 are both made of steel.

The steel has good strength and shear resistance, thereby facilitating further improvement of the stability of the steel beam 100, so that the steel beam 100 can still stably support the girder 201 of the bridge 200 during the construction process.

In some embodiments, the ratio of the thickness of the first web 10 to the thickness of the second web 20 is β,2 ≦ β ≦ 3.

It will be appreciated that the above thickness ratios are suitable for most construction applications. Of course, in other embodiments of the present invention, the thickness of the first web 10 and the thickness of the second web 20 may be calculated according to the overall stress condition of the main beam 201 of the bridge 200 during the construction process.

In some embodiments, the ratio of the length of the first web 10 to the length of the second web 20 in the direction of the distribution of the first web 10 and the second web 20 is γ,0.75 ≦ γ ≦ 1.25.

It will be appreciated that the above length ratios are suitable for most construction applications. Of course, in other embodiments of the present invention, the length of the first web 10 and the length of the second web 20 may be calculated according to the overall stress condition of the main beam 201 of the bridge 200 during the construction process.

As shown in fig. 2, the embodiment of the present invention further discloses a bridge 200, which includes a plurality of steel beams 100, and a girder 201 is composed of the plurality of steel beams 100. According to the embodiment of the present invention, the bridge 200 has the steel beam 100 described above, so as to have the advantages of any one of the steel beams 100 described above, which is not repeated herein.

In some embodiments, the main beam 201 has an i-shaped cross section, and the stiffening ribs 30 face the longitudinal bridge-to-center direction of the bridge beam 200.

Because the stress directions of the main beams 201 in different shapes are different, when the cross section of the main beam 201 is i-shaped, the stiffening ribs 30 are arranged towards the longitudinal bridge of the bridge 200 towards the center direction, so that the stability of the steel beam 100 can be further improved.

In some embodiments, the main beam 201 is box-shaped in cross-section, with the stiffening ribs 30 facing the inside of the main beam 201.

Because the main beams 201 in different shapes are stressed in different directions, when the cross section of the main beam 201 is box-shaped, the stiffening ribs 30 are arranged towards the inner side of the main beam 201, so that the stability of the steel beam 100 can be further improved.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A steel beam, comprising:

a first web;

the second web plate is arranged above the first web plate, the thickness of the first web plate is larger than that of the second web plate, and the first side of the first web plate and the first side of the second web plate are positioned on the same plane;

the stiffening ribs are arranged on the first side of the first web plate and the first side of the second web plate and connected with the first web plate and the second web plate;

the first flange is located the first web deviates from one side of second web, the first flange with first web with the stiffening rib is connected:

the second flange, the second flange is located the second web deviates from one side of first web, the second flange with the second web with the stiffening rib is connected.

2. The steel beam of claim 1, wherein: the steel beam further comprises a third web, the first web and the second web are connected through the third web, the thicknesses of two ends of the third web are respectively the same as those of the first web and the second web, and the thickness of the third web is gradually reduced in the direction departing from the first web.

3. The steel beam of claim 2, wherein: the side surface of the third web plate, which is far away from the stiffening rib, is an inclined surface, the included angle between the inclined surface and the first side of the first web plate is alpha, and alpha is more than 0 and less than or equal to 18.44 degrees.

4. The steel beam of claim 1, wherein: the first web and the second web are connected by welding.

5. The steel beam of claim 1, wherein: one end of the stiffening rib is flush with the end part of the first web deviating from the second web, and the other end of the stiffening rib is flush with the end part of the second web deviating from the first web.

6. The steel beam of claim 1, wherein: the first web plate and the second web plate are both made of steel.

7. A bridge, comprising:

the steel beam of any one of claims 1-6, a plurality of the steel beams comprising a girder of the bridge.

8. The bridge of claim 7, wherein the cross-section of the main beam is I-shaped, and the stiffening ribs face in a longitudinal bridge-to-center direction of the bridge.