Steel beam and bridge

Abstract

The application discloses a steel beam and a bridge, and relates to the technical field of bridge construction. 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 located on the same plane; the stiffening rib is arranged on the first side of the first web plate and the first side of the second web plate and is connected with the first web plate and the second web plate. The steel beam can guarantee the stability of the steel beam and reduce the processing workload and cost of the steel beam.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction technology, and in particular to a steel beam and a bridge. BACKGROUND

[0002] In known bridge pushing construction, the pushing support point has a large local force, and the steel beam will be subjected to the reaction force of the force during construction, which will cause the problem of instability of the steel beam. In the construction process, in order to avoid the above-mentioned problem of instability of the steel beam, a large number of stiffening ribs are arranged on the side wall of the web plate to increase the strength of the web plate, some stiffening ribs have a long length, and some stiffening ribs have a short length, and a plurality of short length stiffening ribs need to be additionally arranged. However, the welding work amount is significantly increased by arranging a large number of stiffening ribs, and the material cost is also significantly increased.

[0003] Therefore, there is an urgent need for a steel beam and a bridge to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a steel beam and a bridge that can ensure the stability of the steel beam and reduce the processing workload and cost of the steel beam.

[0005] To achieve the above technical effects, the technical solutions of the present application are as follows:

[0006] A steel beam, comprising: a first web plate; a second web plate, the second web plate is arranged on the first web plate, the thickness of the first web plate is greater than the thickness of the second web plate, the first side of the first web plate and the first side of the second web plate are located in the same plane; a stiffening rib, the stiffening rib is 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; a first flange, the first flange is arranged on the side of the first web plate away from the second web plate, the first flange is connected with the first web plate and the stiffening rib; a second flange, the second flange is arranged on the side of the second web plate away from the first web plate, the second flange is connected with the second web plate and the stiffening rib.

[0007] Further, 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 both ends of the third web plate is the same as the thickness of the first web plate and the second web plate, and the thickness of the third web plate gradually decreases in the direction away from the first web plate.

[0008] Further, the side of the third web plate 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 α, and 0 < α ≤ 18.44°.

[0009] Further, the first web plate and the second web plate are welded.

[0010] Further, one end of the stiffening rib is flush with the end of the first web away from the second web, and the other end of the stiffening rib is flush with the end of the second web away from the first web.

[0011] Further, the first web and the second web are both made of steel.

[0012] A bridge comprising the steel beam as described above, and a plurality of the steel beams form a main beam of the bridge.

[0013] Further, the main beam has an I-shaped cross section, and the stiffening rib is directed towards the longitudinal center of the bridge.

[0014] The beneficial effects of the present application are:

[0015] According to the steel beam of the present application, the first web and the second web have different thicknesses, and the second web is located on the first web, so that the first web can form a stable support, and the second web with a smaller thickness can more smoothly transmit the reaction force to the first web, thereby ensuring the overall stability of the steel beam in terms of the overall shape structure of the steel beam and the force transmission. Meanwhile, since the first side of the first web and the first side of the second web are located in the same plane, and the side is additionally provided with a stiffening rib, the stability of the first web and the second web can be further strengthened by the stiffening rib at the same plane, thereby significantly improving the shear stability of the steel beam. Therefore, by the structure of the first web and the second web with different thicknesses, the present application can achieve the strengthening effect of the stability of the steel beam by a plurality of stiffening ribs in the known technology by only a single stiffening rib, thereby significantly simplifying the structure of the steel beam under the premise of ensuring the stability and construction safety of the steel beam in the construction process, reducing a large amount of processing and welding work of the stiffening ribs, improving the construction efficiency, saving the overall material demand of the steel beam, reducing the construction cost, and improving the aesthetics of the bridge without the dense stiffening ribs.

[0016] According to the bridge of the present application, since the steel beams with different thicknesses are provided, the stability of the steel beam under stress can be ensured without additionally providing a plurality of stiffening ribs.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the steel beam provided by the embodiment of the present application;

[0019] Figure 2 is a structural schematic diagram of the bridge provided by the embodiment of the present application.

[0020] Reference signs

[0021] 100, steel beam; 200, bridge; 201, main beam; 10, first web; 20, second web; 30, stiffener; 40, third web; 41, slope; 50, first flange; 60, second flange. DETAILED DESCRIPTION

[0022] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless explicitly defined and limited otherwise, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature to the second feature include the vertical direction of the first feature below and oblique to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0025] It should be understood that the terms "center", "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 indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more. In addition, the terms "first", "second" are only used to distinguish the description and have no special meaning.

[0026] The following will be describedFigure 1 and Figure 2 The specific structure of the steel beam 100 of the embodiment of the present application is described.

[0027] As Figure 1 shown, Figure 1 A steel beam 100 is disclosed, which comprises a first web plate 10, a second web plate 20 and a stiffening rib 30. The second web plate 20 is arranged on the first web plate 10, the thickness of the first web plate 10 is greater 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 located in the same plane. The stiffening rib 30 is arranged on the first side of the first web plate 10 and the first side of the second web plate 20 and connected with the first web plate 10 and the second web plate 20.

[0028] It can be understood that the thicknesses of the first web plate 10 and the second web plate 20 of the embodiment are different, and the second web plate 20 is arranged on the first web plate 10, so that the first web plate 10 can form a stable support, and the thickness of the second web plate 20 is smaller, which can more smoothly transmit the reaction force to the first web plate 10, and whether from the overall shape structure of the steel beam 100 or from the force transmission, the overall stability of the steel beam 100 is ensured. At the same time, since the first side of the first web plate 10 and the first side of the second web plate 20 are located in the same plane, and the side is additionally provided with the stiffening rib 30, the stability of the first web plate 10 and the second web plate 20 at the same plane can be further strengthened by the stiffening rib 30, thereby significantly improving the shear stability of the steel beam 100.

[0029] Therefore, through the structure of the first web plate 10 and the second web plate 20 with different thicknesses, the embodiment can achieve the strengthening effect of the multiple stiffening ribs 30 on the stability of the steel beam 100 in the known technology by only a single stiffening rib 30, thereby significantly simplifying the structure of the steel beam 100 under the premise of ensuring the stability and construction safety of the steel beam 100 in the construction process, reducing a large amount of processing and welding work of the stiffening ribs 30, improving the construction efficiency, saving the overall material demand of the steel beam 100, reducing the construction cost, and at the same time, the steel beam 100 no longer has the dense stiffening ribs 30, which also improves the aesthetics of the bridge 200.

[0030] The steel beam 100 further comprises a first flange 50 and a second flange 60. The first flange 50 is arranged on the side of the first web plate 10 away from the second web plate 20, and the first flange 50 is connected with the first web plate 10 and the stiffening rib 30. The second flange 60 is arranged on the side of the second web plate 20 away from the first web plate 10, and the second flange 60 is connected with the second web plate 20 and the stiffening rib 30. The first flange 50 makes the steel beam 100 easy to connect with other structures of the bridge 200 during construction, and the second flange 60 can further play a good supporting role on the steel beam 100 and be connected with other structures.

[0031] In addition, the first web plate 10 and the second web plate 20 in the embodiment can be flat plates or corrugated plates, and the specific plate structure can be determined according to actual construction requirements, and the present application does not limit this.

[0032] In some embodiments, as shown in Figure 1 The steel beam 100 further includes a third web plate 40, and the first web plate 10 and the second web plate 20 are connected through the third web plate 40. The thickness of the two ends of the third web plate 40 is the same as the thickness of the first web plate 10 and the second web plate 20, respectively, and the thickness of the third web plate 40 gradually decreases in the direction away from the first web plate 10.

[0033] It can be understood that the third web plate 40 can play an overacting role on the connection between the first web plate 10 and the second web plate 20 to prevent the force from being smoothly transmitted from the second web plate 20 to the first web plate 10, thereby ensuring the smoothness of force transmission between the second web plate 20 and the first web plate 10, and further ensuring the support stability of the steel beam 100 and improving the construction safety of the bridge 200.

[0034] In some embodiments, as shown in Figure 1 The side of the third web plate 40 away from the stiffening rib 30 is an inclined surface 41, and the angle between the inclined surface 41 and the first side of the first web plate 10 is a, and 0 < a < 18.44°.

[0035] It can be understood that when a is greater than 18.44°, the transition of the third web plate 40 is relatively steep, and it is difficult to achieve a better force transmission effect. Therefore, by limiting the value of a, the transition mitigation degree of the third web plate 40 can be improved.

[0036] Specifically, in the embodiment, the end of the second web plate 20 towards the first web plate 10 is chamfered to form the third web plate 40. Therefore, the third web plate 40 of the 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.

[0037] In some embodiments, as shown in Figure 1 The first web plate 10 and the second web plate 20 are integrally formed.

[0038] It should be noted that in the present application, the method of integrally forming the first web plate 10 and the second web plate 20 is various, for example, in some embodiments, the first web plate 10 is integrally formed on the second web plate 20 by using a molding method such as injection molding, compression molding, hot pressing, etc.; for example, in some embodiments, the first web plate 10 and the second web plate 20 are formed by using an integrated casting processing method. That is, in the present embodiment, the method of forming the first web plate 10 and the second web plate 20 as an integrally formed piece can be any integrally formed method. In the present embodiment, the emphasis is on the structure of the first web plate 10 and the second web plate 20 that cannot be disassembled, rather than the process of integrally forming the first web plate 10 and the second web plate 20. It can be understood that the integrally formed structure has better stability, so that the force can be more smoothly transmitted from the second web plate 20 to the first web plate 10, so as to further improve the shear stability of the steel beam 100.

[0039] Specifically, in the present embodiment, the first web plate 10 and the second web plate 20 are connected by butt welding.

[0040] In some embodiments, as shown in FIG. 1, one end of the stiffening rib 30 is flush with the end of the first web plate 10 away from the second web plate 20, and the other end of the stiffening rib 30 is flush with the end of the second web plate 20 away from the first web plate 10. Figure 1

[0041] It can be understood that by limiting the length of the stiffening rib 30, the stiffening rib 30 can also play a role in force transmission, thereby further improving the shear stability of the steel beam 100.

[0042] In some embodiments, the first web plate 10 and the second web plate 20 are both made of steel.

[0043] 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 main beam 201 of the bridge 200 during the construction process.

[0044] In some embodiments, the ratio of the thickness of the first web plate 10 to the thickness of the second web plate 20 is β, and 2≤β≤3.

[0045] It can be understood that the above thickness ratio can be applicable to most construction occasions. Of course, in other embodiments of the present application, the thickness of the first web plate 10 and the thickness of the second web plate 20 can be calculated according to the overall stress condition of the main beam 201 of the bridge 200 during the construction process.

[0046] In some embodiments, in the distribution direction of the first web plate 10 and the second web plate 20, the ratio of the length of the first web plate 10 to the length of the second web plate 20 is γ, and 0.75≤γ≤1.25.

[0047] ​It can be understood that the length ratio can be applied to most construction sites. Of course, in other embodiments of the present application, the length of the first web 10 and the length of the second web 20 can be calculated according to the overall stress of the girder 201 of the bridge 200 in the construction process.

[0048] As shown in Figure 2 The embodiment of the present application further discloses a bridge 200, which comprises a plurality of steel beams 100, and the plurality of steel beams 100 form a girder 201. The bridge 200 according to the embodiment of the present application has the advantages of any one of the steel beams 100 described above, and details are not described herein again.

[0049] In some embodiments, the cross section of the girder 201 is an I-shaped section, and the stiffening rib 30 is arranged towards the longitudinal direction center of the bridge 200.

[0050] Since the stress directions of different shapes of the girder 201 are different, when the cross section of the girder 201 is an I-shaped section, the arrangement of the stiffening rib 30 towards the longitudinal direction center of the bridge 200 can further improve the stability of the steel beam 100.

[0051] In some embodiments, the cross section of the girder 201 is a box-shaped section, and the stiffening rib 30 is arranged towards the inner side of the girder 201.

[0052] Since the stress directions of different shapes of the girder 201 are different, when the cross section of the girder 201 is a box-shaped section, the arrangement of the stiffening rib 30 towards the inner side of the girder 201 can further improve the stability of the steel beam 100.

[0053] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A steel beam, characterized in that, The steel beam comprises: a first web plate; a second web plate, which is arranged above 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 in the same plane; both the first web plate and the second web plate are made of steel; 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 the two ends of the third web plate is the same as that of the first web plate and the second web plate respectively, and the thickness of the third web plate gradually decreases in the direction away from the first web plate; the side of the third web plate away from the stiffening rib is an inclined surface, the angle between the inclined surface and the first side of the first web plate is α, and 0 < α ≤ 18.44°; a stiffening rib, which is arranged on the first side of the first web plate and the first side of the second web plate and is connected with the first web plate and the second web plate; one end of the stiffening rib is flush with the end of the first web plate away from the second web plate, and the other end of the stiffening rib is flush with the end of the second web plate away from the first web plate; a first flange, which is arranged on the side of the first web plate away from the second web plate, and is connected with the first web plate and the stiffening rib; a second flange, which is arranged on the side of the second web plate away from the first web plate, and is connected with the second web plate and the stiffening rib.

2. A bridge, characterized in that The steel beam comprises: a plurality of steel beams as claimed in claim 1, which constitute the main beam of the bridge.

3. The bridge of claim 2, wherein, The cross section of the main beam is H-shaped, and the stiffening rib is directed towards the longitudinal center of the bridge. The steel beam comprises: a first web plate; a second web plate, which is arranged above 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 in the same plane; both the first web plate and the second web plate are made of steel; 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 the two ends of the third web plate is the same as that of the first web plate and the second web plate respectively, and the thickness of the third web plate gradually decreases in the direction away from the first web plate; the side of the third web plate away from the stiffening rib is an inclined surface, the angle between the inclined surface and the first side of the first web plate is α, and 0 < α ≤ 18.44°; a stiffening rib, which is arranged on the first side of the first web plate and the first side of the second web plate and is connected with the first web plate and the second web plate; one end of the stiffening rib is flush with the end of the first web plate away from the second web plate, and the other end of the stiffening rib is flush with the end of the second web plate away from the first web plate; a first flange, which is arranged on the side of the first web plate away from the second web plate, and is connected with the first web plate and the stiffening rib; a second flange, which is arranged on the side of the second web plate away from the first web plate, and is connected with the second web plate and the stiffening rib. The steel beam comprises: a plurality of steel beams as claimed in claim 1, which constitute the main beam of the bridge. The cross section of the main beam is H-shaped, and the stiffening rib is directed towards the longitudinal center of the bridge.

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