Composite beams and bridges

Abstract

The present invention discloses a composite beam and a bridge, which are applied to bridges. The composite beam includes a plurality of main boxes and a crossbeam assembly arranged at the bottom of the bridge deck. The crossbeam assembly includes at least one inner crossbeam, which is arranged between two adjacent main boxes. The plurality of inner crossbeams extend circumferentially in a direction away from the main box and abut against the other main box. The composite beam is provided with a plurality of main boxes and crossbeam assemblies that cooperate with each other, wherein the plurality of inner crossbeams in the crossbeam assembly can extend circumferentially in a direction away from the main box and connect to each other, and the last inner crossbeam in the extension direction abuts against the other main box. Finally, the plurality of inner crossbeams connect the two adjacent main boxes to adapt to the width of the bridge deck, thereby overcoming the defect in the prior art that the width requirement of the bridge cannot be well solved.

Description

Technical Field

[0001] The invention relates to a composite beam and a bridge. Background Art

[0002] With economic development, traffic volume continues to increase, and the demand for bridge width continues to increase. For wide bridge decks, most currently use a steel box as the main beam, and the steel box is connected with cantilevers on both sides. However, the reasonable length of the cantilevers on both sides of the steel box is limited. Therefore, the existing technology often adapts to bridges of different widths by increasing the length of the steel box. However, simply increasing the width of the steel box to avoid increasing the cantilever length is not a reasonable choice in most cases, because the widened steel box bottom plate will increase the amount of steel used. In addition, the fatigue damage of the steel bridge deck and the fragility of the pavement have become problems for many bridges, which not only costs a lot of testing, evaluation and reinforcement costs, but also affects normal traffic. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a composite beam and a bridge in order to overcome the defect in the prior art that the width requirement of the bridge cannot be well solved.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A composite beam is applied to a bridge, the composite beam comprising a plurality of main box chambers and a crossbeam assembly arranged at the bottom of the bridge deck of the bridge, the crossbeam assembly comprising at least one inner crossbeam, the inner crossbeam being arranged between two adjacent main box chambers, the plurality of inner crossbeams extending circumferentially in a direction away from the main box chambers and abutting against another main box chamber.

[0006] In this solution, the composite beam is provided with multiple main box chambers and crossbeam assemblies that cooperate with each other, wherein multiple inner crossbeams in the crossbeam assembly can extend circumferentially in a direction away from the main box chamber and connect to each other, and the last inner crossbeam in the extension direction abuts against another main box chamber. Finally, multiple inner crossbeams connect the two adjacent main box chambers to adapt to the width of the bridge deck, thereby overcoming the defect that the width requirement of the bridge cannot be well solved in the existing technology.

[0007] Preferably, the inner cross beam comprises an inner cross beam top plate, an inner cross beam web plate and an inner cross beam bottom plate, two ends of the inner cross beam web plate are respectively connected to the inner cross beam top plate and the inner cross beam bottom plate, and all three extend along the width direction of the bridge deck;

[0008] The inner crossbeam also includes an inner crossbeam stiffening component, which includes a plurality of inner crossbeam web vertical stiffening components, at least one inner crossbeam web transverse stiffening component and at least one inner crossbeam web manhole stiffening component. The inner crossbeam web transverse stiffening component extends in a direction away from the main box chamber, and a plurality of the inner crossbeam web vertical stiffening components are arranged at intervals and respectively intersect with the inner crossbeam web transverse stiffening components. The inner crossbeam web manhole stiffening component is arranged in the height direction at the upper end of one of the inner crossbeam web vertical stiffening components and is partially attached to the inner crossbeam web transverse stiffening component.

[0009] In this solution, the inner crossbeam top plate, the inner crossbeam web plate and the inner crossbeam bottom plate are connected and cooperated with each other to form the overall frame structure of the inner crossbeam. This structure has preliminary stability and can bear the force applied by the bridge deck to a certain extent. At the same time, the inner crossbeam stiffening components are divided into inner crossbeam web vertical stiffening components, inner crossbeam web transverse stiffening components and inner crossbeam web manhole stiffening components according to different force conditions. Through the above three different stiffening components, the internal connection stability of the inner crossbeam is improved, so that the inner crossbeam can withstand more force, which is convenient for providing more stable support for the bridge deck.

[0010] Preferably, the main box is a steel box with the crossbeam assembly connected to both ends, the upper surface of the main box rests against the lower surface of the bridge deck, and the lower surface of the main box is supported on the bridge pier.

[0011] In this solution, the main box chamber is connected to the crossbeam assembly at both ends, and based on the structural characteristics of the crossbeam assembly, the length can be adjusted according to specific needs, so it can adapt well to the width of the bridge deck; at the same time, the upper surface of the main box chamber is against the lower surface of the bridge deck, and the lower surface of the main box chamber is supported on the bridge piers. The main box chamber can serve as a load-bearing intermediate layer and cooperate with the bridge piers to stably support the bridge deck.

[0012] Preferably, the main chamber includes at least one main chamber top plate, at least one main chamber bottom plate, a plurality of main chamber web plates and at least one main chamber partition plate, the ends of the plurality of main chamber web plates and the main chamber partition plate are respectively connected to the main chamber top plate and the main chamber bottom plate, and the main chamber partition plate surrounds the main chamber web plates;

[0013] The main box chamber web includes an inner web of the main box chamber and an outer web of the main box chamber;

[0014] The main box chamber further comprises a main box chamber cross beam web, which is connected to the main box chamber inner web and partially attached to the inner cross beam web.

[0015] In this solution, the main box chamber is provided with a main box chamber top plate, a main box chamber bottom plate, a main box chamber web plate, a main box chamber partition plate and a main box chamber cross beam web plate, which act together on the main box chamber structure to improve the structural stability and strength of the main box chamber.

[0016] Preferably, a main box chamber top plate vertical stiffening component is provided on the inner side surface of the main box chamber top plate, a plurality of main box chamber web vertical stiffening components and a plurality of main box chamber web transverse stiffening components are correspondingly provided on the inner side surfaces of the main box chamber inner web and the main box chamber outer web, and at least one main box chamber partition stiffening component is provided on the main box chamber partition.

[0017] In this solution, the various reinforcing components provided on the main box chamber top plate, the main box chamber web plate and the main box chamber partition plate can also increase the strength and stability of the main box chamber top plate.

[0018] Preferably, the crossbeam assembly further includes an outer crossbeam, the outer crossbeam including an outer crossbeam top plate, an outer crossbeam web plate and an outer crossbeam bottom plate, two ends of the outer crossbeam web plate are respectively connected to the outer crossbeam top plate and the outer crossbeam bottom plate, and the three extend in a direction close to the main box chamber and abut against the main box chamber;

[0019] The outer cross beam web is provided with an outer cross beam web stiffening component, and the outer cross beam web stiffening component abuts against the outer cross beam top plate and the outer cross beam bottom plate along the height direction.

[0020] In this solution, the outer crossbeam, as part of the crossbeam assembly, is also located at the bottom of the bridge deck and extends circumferentially along the width of the bridge deck. It can cooperate with the inner crossbeam and the main box chamber to provide stable support for the bridge deck. At the same time, the stiffening components arranged in the web of the outer crossbeam provide support force to the web of the outer crossbeam, thereby improving the structural strength of the web of the outer crossbeam.

[0021] Preferably, the beam assembly further comprises a cantilever beam, the cantilever beam extending along the width direction of the bridge deck, and the cantilever beam being arranged obliquely away from the side of the bridge deck.

[0022] In this solution, the cantilever beam is also part of the beam assembly. It is located at the bottom of the bridge deck and extends circumferentially along the width of the bridge deck. It can cooperate with the inner beam, main box and outer beam to provide stable support for the bridge deck.

[0023] Preferably, the cantilever beam includes a cantilever beam top plate, a cantilever beam web plate and a cantilever beam bottom plate, and two ends of the cantilever beam web plate are respectively connected to the cantilever beam top plate and the cantilever beam bottom plate;

[0024] The cantilever crossbeam further includes at least one small longitudinal beam, which is arranged near the connection between the cantilever crossbeam and the outer crossbeam, and the small longitudinal beam includes a small longitudinal beam top plate, a small longitudinal beam web plate and a small longitudinal beam bottom plate, and the two ends of the small longitudinal beam web plate are correspondingly connected to the small longitudinal beam top plate and the small longitudinal beam bottom plate, and the small longitudinal beam bottom plate is attached to the cantilever crossbeam bottom plate;

[0025] The cantilever crossbeam also includes a side longitudinal beam side plate and a side longitudinal beam bottom plate. The cantilever crossbeam top plate and the cantilever crossbeam bottom plate extend and abut against the side longitudinal beam side plates. The side longitudinal beam bottom plate is arranged at the upper end of the cantilever crossbeam bottom plate and the side longitudinal beam side plates intersect.

[0026] In this solution, the cantilever beam top plate, cantilever beam web plate and cantilever beam bottom plate are interconnected to initially form the external frame of the cantilever beam. At the same time, the cantilever beam also includes a small longitudinal beam, a side longitudinal beam side plate and a side longitudinal beam bottom plate. Under the joint action of multiple components, a cantilever beam with a stable structure is finally formed. A small longitudinal beam is arranged in the cantilever beam, which can not only ensure the stability of the steel beam during the installation process, but also provide a template for the cast-in-place joints of the concrete bridge deck.

[0027] Preferably, a plurality of cantilever cross beam top plate stiffening components are provided on the outer side of the cantilever cross beam top plate, and the plurality of cantilever cross beam top plate stiffening components extend in a direction close to the cantilever cross beam bottom plate;

[0028] A plurality of small longitudinal beam web stiffening components are provided on the small longitudinal beam web, and the plurality of small longitudinal beam web stiffening components extend in a direction away from the small longitudinal beam web and are connected to the main box chamber.

[0029] In this solution, the small longitudinal beam web reinforcement components provided on the small longitudinal beam web also play a supporting and reinforcing role.

[0030] Preferably, a staircase portion is provided on the outer side of the top plate of the cantilever beam in a direction away from the outer beam, and the bridge deck is clipped to the staircase portion.

[0031] In this solution, by providing a staircase portion, the bridge deck can be stably clamped in the staircase portion to prevent the bridge deck from shaking.

[0032] A bridge comprises the above-mentioned composite beam.

[0033] In this solution, the bridge provided with the above-mentioned composite beam can solve the defect that the width requirement of the bridge cannot be well solved in the existing technology, and has high economic value and practicality.

[0034] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0035] The positive progressive effect of the present invention is that: in the present invention, the composite beam is provided with multiple main box chambers and crossbeam assemblies that cooperate with each other, wherein multiple inner crossbeams in the crossbeam assembly can extend circumferentially in a direction away from the main box chamber and be connected to each other, and the last inner crossbeam in the extension direction abuts against another main box chamber, and finally multiple inner crossbeams connect the two adjacent main box chambers to adapt to the width of the bridge deck, overcoming the defect in the prior art that the width requirement of the bridge cannot be well solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of the composite beam according to an embodiment of the present invention.

[0037] Figure 2 It is a structural schematic diagram of the main box chamber of the present invention, wherein the left side is a front view of the main box chamber, the middle is a cross-sectional view of the main box chamber with the transverse and vertical stiffening components of the main box chamber web, and the right side is a cross-sectional view of the main box chamber with the main box chamber partition.

[0038] Figure 3 It is a front view of the inner cross beam of the present invention.

[0039] Figure 4 for Figure 3 Cross-section of AA.

[0040] Figure 5 for Figure 3 Cross-section of the BB.

[0041] Figure 6 It is a top view of the inner cross beam of the present invention.

[0042] Figure 7 It is a bottom view of the inner cross beam of the present invention.

[0043] Figure 8 It is a front view of the outer cross beam of the present invention.

[0044] Figure 9 for Figure 8 Cross-section of AA.

[0045] Figure 10 It is a top view of the outer cross beam of the present invention.

[0046] Figure 11 It is a bottom view of the outer cross beam of the present invention.

[0047] Figure 12 It is a front view of the cantilever beam of the present invention.

[0048] Figure 13 It is a top view of the cantilever beam of the present invention.

[0049] Figure 14It is a bottom view of the cantilever beam of the present invention.

[0050] Figure 15 for Figure 12 Cross-section of AA.

[0051] Description of reference numerals:

[0052] Main box room 1

[0053] Inner crossbar 2

[0054] Outer crossbeam 3

[0055] Cantilever beam 4

[0056] Main box inner side plate 5

[0057] Main box outer side web 6

[0058] Main chamber top plate 7

[0059] Main box bottom plate 8

[0060] Main box room top plate vertical reinforcement component 9

[0061] Main box web transverse stiffening component 10

[0062] Main box web vertical stiffening component 11

[0063] Main compartment partition 12

[0064] Main compartment partition reinforcement component 13

[0065] Main box room beam web 14

[0066] Inner crossbeam top plate 15

[0067] Inner crossbeam bottom plate 16

[0068] Inner crossbeam web 17

[0069] Inner cross beam web vertical stiffening component 18

[0070] Inner cross beam web transverse stiffening member 19

[0071] Inner cross beam web manhole reinforcement component 20

[0072] Inner cross beam web vertical stiffening component 21

[0073] Outer crossbeam top plate 22

[0074] Outer crossbeam bottom plate 23

[0075] Outer crossbeam web 24

[0076] Outer beam web stiffening component 25

[0077] Small longitudinal beam top plate 26

[0078] Cantilever beam top plate 27

[0079] Cantilever beam top plate 28

[0080] Small longitudinal beam web 29

[0081] Small longitudinal beam web stiffening component 30

[0082] Cantilever beam bottom plate 31

[0083] Staircase 32

[0084] Side beam side plate 33

[0085] Side beam bottom plate 34

[0086] Cantilever beam web 35

[0087] Cantilever beam top plate reinforcement component 36 DETAILED DESCRIPTION

[0088] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0089] The embodiment of the present invention discloses a composite beam, such as Figure 1 As shown, it is applied to a bridge, and the composite beam includes a plurality of main box chambers 1 and a crossbeam assembly provided at the bottom of the bridge deck, and the crossbeam assembly includes at least one inner crossbeam 2, and the inner crossbeam 2 is provided between two adjacent main box chambers 1, and the plurality of inner crossbeams 2 extend circumferentially in a direction away from the main box chamber 1 and abut against another main box chamber 1. The composite beam is provided with a plurality of main box chambers 1 and crossbeam assemblies that cooperate with each other, wherein the plurality of inner crossbeams 2 in the crossbeam assembly can extend circumferentially in a direction away from the main box chamber 1 and connect to each other, and the last inner crossbeam 2 in the extension direction abuts against another main box chamber 1, and finally the plurality of inner crossbeams 2 connect the two adjacent main box chambers 1 to adapt to the width of the bridge deck, thereby overcoming the defect in the prior art that the width requirement of the bridge cannot be well solved.

[0090] In a preferred embodiment, the lengths of the cantilever beam 4 and the outer crossbeam 3 in this embodiment do not change, and only the length of the inner crossbeam 2 is adjusted to adapt to bridge decks of different widths, which can meet the increasing demand for bridge widths. Because the reasonable length of the cantilever of the crossbeam assembly on both sides of the steel stiffening beams used in most existing technologies is limited, simply increasing the width of the main box 1 to reduce the cantilever length of the crossbeam assembly and the outer crossbeam 3 and the cantilever beam 4 is not a reasonable choice. The widened main box bottom plate 8 will increase the amount of steel used, and the fatigue damage and easy damage of the pavement of the main box 1 have become a problem for many bridges, which not only costs a lot of testing, evaluation, and reinforcement costs, but also affects normal traffic. By increasing the width of the inner crossbeam 2 circumferentially, the inner crossbeam 2 is easy to disassemble and install, easy to test, and has a low cost. It is easy to process and has a short construction period, so it can better solve this problem.

[0091] Specifically, if Figure 2 As shown, the stress form of the composite beam is clear, the main box chamber 1 is the main vertical stress-bearing component, the inner cross beam 2, the outer cross beam 3 and the cantilever cross beam 4 adopt a solid-web cross diaphragm structure, which meets the structural requirements of the wider bridge deck beam width and the lateral stress requirements. The structure of the composite beam not only ensures sufficient lateral stiffness, but also has the advantages of light structure, unified cross beam components of the entire bridge, good economy, less processing difficulty, and short construction period.

[0092] like Figure 3-Figure 7As shown, the inner cross beam 2 includes an inner cross beam top plate 15, an inner cross beam web 17 and an inner cross beam bottom plate 16. The two ends of the inner cross beam web 17 are respectively connected to the inner cross beam top plate 15 and the inner cross beam bottom plate 16, and all three extend along the width direction of the bridge deck; the inner cross beam 2 also includes an inner cross beam 2 stiffening component, which includes a plurality of inner cross beam web vertical stiffening components, at least one inner cross beam web transverse stiffening component 1 9 and at least one inner cross beam web manhole stiffening member 20, the inner cross beam web transverse stiffening member 19 extends in a direction away from the main box chamber 1, a plurality of inner cross beam web vertical stiffening members are arranged at intervals and respectively intersect with the inner cross beam web transverse stiffening member 19, the inner cross beam web manhole stiffening member 20 is arranged at the upper end of one of the inner cross beam web vertical stiffening members in the height direction and is partially attached to the inner cross beam web transverse stiffening member 19. The inner crossbeam top plate 15, the inner crossbeam web 17 and the inner crossbeam bottom plate 16 are connected and cooperated with each other to form the overall frame structure of the inner crossbeam 2. The structure has preliminary stability and can play a certain role in bearing the force applied by the bridge deck. At the same time, the inner crossbeam stiffening components are divided into inner crossbeam web vertical stiffening components, inner crossbeam web transverse stiffening components 19 and inner crossbeam web manhole stiffening components 20 according to different force conditions. Through the above three different stiffening components, the internal connection stability of the inner crossbeam 2 is improved, so that the inner crossbeam 2 can withstand more force, which is convenient for providing more stable support for the bridge deck.

[0093] Specifically, in this embodiment, the inner cross beam web vertical stiffening components are divided into inner cross beam web vertical stiffening components 18 and inner cross beam web vertical stiffening components 21 .

[0094] like Figure 2 As shown, the main chamber 1 is a steel box with crossbeam assemblies connected at both ends. The upper surface of the main chamber 1 abuts against the lower surface of the bridge deck, while the lower surface of the main chamber 1 is supported by the bridge piers. The crossbeam assemblies connected at both ends, and the structural characteristics of the crossbeam assemblies that can adjust their length according to specific needs, effectively adapt to the width of the bridge deck. At the same time, the upper surface of the main chamber 1 abuts against the lower surface of the bridge deck, while the lower surface of the main chamber 1 is supported by the bridge piers. The main chamber 1 can serve as a load-bearing intermediate layer and cooperate with the bridge piers to stably support the bridge deck.

[0095] like Figure 2As shown, the main box chamber 1 includes at least one main box chamber top plate 7, at least one main box chamber bottom plate 8, a plurality of main box chamber 1 webs, and at least one main box chamber partition plate 12. The ends of the plurality of main box chamber 1 webs and the main box chamber partition plate 12 are respectively connected to the main box chamber top plate 7 and the main box chamber bottom plate 8, and the main box chamber partition plate 12 surrounds the main box chamber 1 webs. The main box chamber 1 webs include the main box chamber inner web 5 and the main box chamber outer web 6. The main box chamber 1 also includes a main box chamber crossbeam web 14, which is connected to the main box chamber inner web 5 and partially attached to the inner crossbeam web 17. The main box chamber 1 is provided with the main box chamber top plate 7, the main box chamber bottom plate 8, the main box chamber 1 webs, the main box chamber partition plate 12, and the main box chamber crossbeam web 14, which work together on the structure of the main box chamber 1 to improve the structural stability and strength of the main box chamber 1.

[0096] The inner side of the main chamber top plate 7 is provided with a main chamber top plate vertical stiffening member 9. The inner sides of the main chamber inner web 5 and the main chamber outer web 6 are correspondingly provided with a plurality of main chamber web vertical stiffening members 11 and a plurality of main chamber web transverse stiffening members 10. The main chamber partition 12 is provided with at least one main chamber partition stiffening member 13. The various stiffening members provided on the main chamber top plate 7, the main chamber web 1, and the main chamber partition 12 can also increase the strength and stability of the main chamber top plate 7.

[0097] like Figures 8-11 As shown, the crossbeam assembly further includes an outer crossbeam 3, which includes an outer crossbeam top plate 22, an outer crossbeam web 24, and an outer crossbeam bottom plate 23. The ends of the outer crossbeam web 24 are connected to the outer crossbeam top plate 22 and the outer crossbeam bottom plate 23, respectively. The three outer crossbeams extend toward and abut the main box 1. The outer crossbeam web 24 is provided with an outer crossbeam web stiffening member 25, which abuts the outer crossbeam top plate 22 and the outer crossbeam bottom plate 23 along the height direction. As part of the crossbeam assembly, the outer crossbeam 3 is also located at the bottom of the bridge deck and extends circumferentially along the width direction of the bridge deck. It cooperates with the inner crossbeam 2 and the main box 1 to provide stable support for the bridge deck. The stiffening members provided in the outer crossbeam web 24 also provide support for the outer crossbeam web 24, thereby enhancing its structural strength.

[0098] like Figure 12-15 As shown, the crossbeam assembly also includes a cantilever crossbeam 4, which extends along the width of the bridge deck and is tilted away from the side of the bridge deck. Also part of the crossbeam assembly, the cantilever crossbeam 4 is located at the bottom of the bridge deck and extends circumferentially along the width of the bridge deck. It cooperates with the inner crossbeam 2, the main box 1, and the outer crossbeam 3 to provide stable support for the bridge deck.

[0099] The cantilever crossbeam 4 includes a cantilever crossbeam top plate 27 and a cantilever crossbeam top plate 28, a cantilever crossbeam web 35 and a cantilever crossbeam bottom plate 31, and the two ends of the cantilever crossbeam web 35 are respectively connected to the cantilever crossbeam top plate 28 and the cantilever crossbeam bottom plate 31; the cantilever crossbeam 4 also includes at least one small longitudinal beam, which is arranged near the connection between the cantilever crossbeam 4 and the outer crossbeam 3, and the small longitudinal beam includes a small longitudinal beam top plate 26, a small longitudinal beam web 29 and The small longitudinal beam bottom plate and the two ends of the small longitudinal beam web 29 are correspondingly connected to the small longitudinal beam top plate 26 and the small longitudinal beam bottom plate, and the small longitudinal beam bottom plate is attached to the cantilever beam bottom plate 31; the cantilever beam 4 also includes the side longitudinal beam side plates 33 and the side longitudinal beam bottom plate 34, the cantilever beam top plate 28 and the cantilever beam bottom plate 31 extend and abut against the side longitudinal beam side plates 33, and the side longitudinal beam bottom plate 34 is arranged at the upper end of the cantilever beam bottom plate 31 and intersects with the side longitudinal beam side plates 33. The cantilever beam top plate 28, the cantilever beam web plate 35 and the cantilever beam bottom plate 31 are interconnected and cooperated to initially form the external frame of the cantilever beam 4. At the same time, the cantilever beam 4 also includes a small longitudinal beam, a side longitudinal beam side plate 33 and a side longitudinal beam bottom plate 34. Under the joint action of multiple components, a cantilever beam 4 with a stable structure is finally formed; a small longitudinal beam is arranged in the cantilever beam 4, which can not only ensure the stability of the steel beam during the installation process, but also provide a template for the cast-in-place joints of the concrete bridge deck.

[0100] Specifically, if Figure 12 As shown, in this embodiment, the top plate of the cantilever beam includes two parts, namely the top plate 27 of the cantilever beam and the top plate 28 of the cantilever beam.

[0101] The outer side of the cantilever crossbeam top plate 28 is provided with a plurality of cantilever crossbeam top plate stiffening members 36, which extend in a direction close to the cantilever crossbeam bottom plate 31. The small longitudinal beam web 29 is provided with a plurality of small longitudinal beam web stiffening members 30, which extend in a direction away from the small longitudinal beam web 29 and are connected to the main box 1. The small longitudinal beam web stiffening members 30 provided on the small longitudinal beam web 29 also play a supporting and reinforcing role.

[0102] like Figure 12 As shown, a stair portion 32 is provided on the outer side of the cantilever beam top plate 28 in a direction away from the outer crossbeam 3, and the bridge deck is clamped on the stair portion 32. By providing the stair portion 32, the bridge deck can be stably clamped in the stair portion 32 to prevent the bridge deck from shaking.

[0103] The present invention also discloses a bridge comprising the composite beam. The bridge provided with the composite beam can solve the problem of the existing technology that the width requirement of the bridge cannot be well met, and has high economic value and practicality.

[0104] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A composite beam, which is applied to a bridge, characterized in that: The composite beam includes a plurality of main boxes and a crossbeam assembly provided at the bottom of the bridge deck, wherein the crossbeam assembly includes at least one inner crossbeam provided between two adjacent main boxes, and the plurality of inner crossbeams extend circumferentially in a direction away from the main boxes and abut against another main box; The inner cross beam includes an inner cross beam top plate, an inner cross beam web plate and an inner cross beam bottom plate, two ends of the inner cross beam web plate are respectively connected to the inner cross beam top plate and the inner cross beam bottom plate, and all three extend along the width direction of the bridge deck; The inner cross beam web further includes an inner cross beam web stiffening component, the inner cross beam web stiffening component including a plurality of inner cross beam web vertical stiffening components, at least one inner cross beam web transverse stiffening component and at least one inner cross beam web manhole stiffening component, the inner cross beam web transverse stiffening component extending in a direction away from the main box chamber, a plurality of the inner cross beam web vertical stiffening components are arranged at intervals and respectively intersect with the inner cross beam web transverse stiffening components, the inner cross beam web manhole stiffening component is arranged at the upper end of one of the inner cross beam web vertical stiffening components in the height direction and is partially attached to the inner cross beam web transverse stiffening component; The crossbeam assembly further includes an outer crossbeam, the outer crossbeam including an outer crossbeam top plate, an outer crossbeam web plate and an outer crossbeam bottom plate, the two ends of the outer crossbeam web plate are respectively connected to the outer crossbeam top plate and the outer crossbeam bottom plate, and the three extend in a direction close to the main box chamber and abut against the main box chamber; The outer cross beam web is provided with an outer cross beam web stiffening component, and the outer cross beam web stiffening component abuts against the outer cross beam top plate and the outer cross beam bottom plate along the height direction; The beam assembly further includes a cantilever beam, which extends along the width direction of the bridge deck and is tilted away from the side of the bridge deck.

2. The composite beam according to claim 1, wherein: The main box is a steel box with the crossbeam assemblies connected to both ends. The upper surface of the main box rests against the lower surface of the bridge deck, and the lower surface of the main box is supported by the bridge pier.

3. The composite beam according to claim 1, wherein: The main chamber includes at least one main chamber top plate, at least one main chamber bottom plate, a plurality of main chamber web plates and at least one main chamber partition plate. Two ends of the plurality of main chamber web plates and the main chamber partition plate are respectively connected to the main chamber top plate and the main chamber bottom plate, and the main chamber partition plate surrounds the main chamber web plates. The main box chamber web includes an inner web of the main box chamber and an outer web of the main box chamber; The main box chamber further comprises a main box chamber cross beam web, which is connected to the main box chamber inner web and partially attached to the inner cross beam web.

4. The composite beam according to claim 3, wherein: The inner side surface of the main box chamber top plate is provided with a main box chamber top plate vertical stiffening component, the inner side surfaces of the main box chamber inner web and the main box chamber outer web are correspondingly provided with a plurality of main box chamber web vertical stiffening components and a plurality of main box chamber web transverse stiffening components, and the main box chamber partition is provided with at least one main box chamber partition stiffening component.

5. The composite beam according to claim 1, wherein: The cantilever beam includes a cantilever beam top plate, a cantilever beam web plate and a cantilever beam bottom plate, and both ends of the cantilever beam web plate are respectively connected to the cantilever beam top plate and the cantilever beam bottom plate; The cantilever crossbeam further includes at least one small longitudinal beam, which is arranged near the connection between the cantilever crossbeam and the outer crossbeam, and the small longitudinal beam includes a small longitudinal beam top plate, a small longitudinal beam web plate and a small longitudinal beam bottom plate, and the two ends of the small longitudinal beam web plate are correspondingly connected to the small longitudinal beam top plate and the small longitudinal beam bottom plate, and the small longitudinal beam bottom plate is attached to the cantilever crossbeam bottom plate; The cantilever crossbeam also includes a side longitudinal beam side plate and a side longitudinal beam bottom plate. The cantilever crossbeam top plate and the cantilever crossbeam bottom plate extend and abut against the side longitudinal beam side plates. The side longitudinal beam bottom plate is arranged at the upper end of the cantilever crossbeam bottom plate and the side longitudinal beam side plates intersect.

6. The composite beam according to claim 5, wherein: A plurality of cantilever cross beam top plate stiffening components are provided on the outer side of the cantilever cross beam top plate, and the plurality of cantilever cross beam top plate stiffening components extend in a direction close to the cantilever cross beam bottom plate; A plurality of small longitudinal beam web stiffening components are provided on the small longitudinal beam web, and the plurality of small longitudinal beam web stiffening components extend in a direction away from the small longitudinal beam web and are connected to the main box chamber.

7. The composite beam according to claim 5, wherein: A staircase portion is provided on the outer side of the top plate of the cantilever beam in a direction away from the outer crossbeam, and the bridge deck is clamped to the staircase portion.

8. A bridge, characterized in that: The bridge comprises the composite beam according to any one of claims 1 to 7.

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