Fabricated corrugated steel web steel-concrete composite beam

Abstract

The utility model provides an assembly type corrugated steel web steel-concrete composite beam which comprises a prefabricated composite concrete top plate (1), a steel bottom plate (2) and corrugated steel web supporting mechanisms symmetrically arranged in a box beam, and the prefabricated composite concrete top plate (1) is provided with shear grooves (10) and cluster type stud shear keys (11). The mounting position is arranged right above the flange framework (5); the corrugated steel web supporting mechanism comprises a perforated top plate cross beam (4), a flange framework (5), a flange small longitudinal beam (6), a top plate-web connecting piece (9), a corrugated steel web (3), a profile steel inclined strut (7) and an inclined strut anchor plate (8); according to the corrugated steel web box girder, a prefabricated assembly type component is adopted, the structure is simple, construction is convenient, the weak portion of the corrugated steel web box girder is secondarily reinforced in the longitudinal direction and the transverse direction through the corrugated steel web supporting mechanism arranged in the box girder, the structural strength of the weak portion and the supporting strength of the corrugated steel web are improved, and the service life of the corrugated steel web box girder is prolonged. And generated vibration can be transversely buffered, and the safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to an assembled corrugated steel web steel-concrete composite beam. Background Art

[0002] The corrugated steel web composite box girder structure is a structure in which the web of the concrete box girder is replaced by steel with higher strength. The corrugated steel web and the top and bottom plates are connected by shear keys, forming a composite structure in which steel and concrete each play their own strengths. Using corrugated steel webs as the webs of concrete box girders can effectively reduce the deadweight of the box girder, which is particularly economically beneficial in areas with poor geological conditions. At the same time, replacing the concrete web with corrugated steel webs with higher shear strength can specifically solve the problems of web cracking of large-span continuous rigid frame (continuous beam) bridges and excessive deflection of the beam body caused by web cracking. Therefore, this structure has broad application prospects.

[0003] However, despite the many advantages of the composite box girder structure with corrugated steel web, the corrugated steel web may buckle and fail in long-term use, causing its bearing capacity to drop to the same level as that of ordinary flat steel webs. In addition, the parts where the web is connected to the top and bottom plates may also suffer structural damage during use, affecting the overall stability. At the same time, with the rapid development of modern construction technology, prefabricated steel-concrete composite structures have gradually been widely used in bridge engineering due to their fast on-site construction, low engineering cost, good durability and low life cycle cost. In order to solve these problems and take advantage of modern construction technology, we propose an assembled steel-concrete composite beam with corrugated steel web. Utility Model Content

[0004] The utility model aims to provide an assembled corrugated steel web steel-concrete composite beam to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A prefabricated steel-concrete composite beam with corrugated steel webs comprises: a prefabricated composite concrete top plate, a steel bottom plate and a corrugated steel web support mechanism symmetrically arranged in a box beam, wherein the prefabricated composite concrete top plate is provided with shear grooves and clustered bolt shear keys, and the installation positions are arranged directly above the flange frame; the corrugated steel web support mechanism comprises an open top plate cross beam, a flange frame, a flange small longitudinal beam, a top plate-web connector, a corrugated steel web, a steel brace and a brace anchor plate.

[0007] Furthermore, the perforated top plate cross beam is an H-shaped cross-section steel member, and holes are opened on its two wings; the flange frame is an H-shaped cross-section steel member, and through holes are provided at the positions of the two wings; the perforated top plate cross beam passes through the corresponding through holes on the two wings of the flange frame, and is fixed together by welding at the penetration points.

[0008] Furthermore, the top plate-web connecting piece is an H-shaped steel member, the upper end of which abuts against the flange frame, the lower end of which abuts against the corrugated steel web, and is connected to the flange frame and the corrugated steel web by welding.

[0009] Furthermore, the flange small longitudinal beam is a T-shaped steel member, and holes are opened at the center positions of the flanges on both sides of the T-shaped steel member, and the front and rear ends are respectively connected to two open top plate cross beams and fixed by welding.

[0010] Furthermore, the steel brace is located in the box chamber, one side of which is connected to the perforated top plate cross beam, and the other side is connected to the steel bottom plate; the brace anchor plate is a perforated steel plate, which supports the perforated top plate cross beam and the steel brace.

[0011] Furthermore, clustered stud shear keys are installed in the shear grooves, and the structural connection between the precast composite concrete top plate and the flange frame is achieved through the clustered stud shear keys.

[0012] Furthermore, the perforated top plate cross beam, flange frame, flange small longitudinal beam, diagonal brace anchor plate, top plate and web plate connector, shear groove and clustered bolt shear key can all be adapted and installed in the space reserved in the prefabricated composite concrete top plate, and combined into a whole by pouring high-strength grouting material.

[0013] Furthermore, the tangent value of the angle between the steel brace and the horizontal plane is 2:3; and the height of the brace anchor plate is 0.6 to 0.8 times the thickness of the prefabricated composite concrete top plate.

[0014] Beneficial effects of the utility model:

[0015] In the above technical scheme, the utility model provides an assembled corrugated steel web steel-concrete composite beam, which performs secondary reinforcement on the weak parts of the corrugated steel web box beam through a steel skeleton, strengthens the deformation resistance of the corrugated steel web box beam in the transverse and longitudinal directions, and reasonably utilizes the symmetry of the structure to improve the bearing capacity of the corrugated steel web box beam. The load-bearing capacity of the optimized corrugated steel web box beam is greatly improved, and the optimization cost is reduced. At the same time, the optimized prefabricated assembled structure can better meet the actual engineering standards, speed up the on-site construction speed, improve durability and reduce the life cycle cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those skilled in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a three-dimensional schematic diagram of an assembled corrugated steel web steel-concrete composite beam of the utility model.

[0018] Figure 2 It is a front view of an assembled corrugated steel web steel-concrete composite beam of the utility model.

[0019] Figure 3 The utility model is a top view of an assembled corrugated steel web steel-concrete composite beam.

[0020] Figure 4 It is a left view of an assembled corrugated steel web steel-concrete composite beam of the utility model.

[0021] Description of reference numerals:

[0022] 1 precast composite concrete top plate, 2 steel bottom plate, 3 corrugated steel web, 4 open top plate cross beam, 5 flange frame, 6 flange small longitudinal beam, 7 steel diagonal brace, 8 diagonal brace anchor plate, 9 top plate and web connector, 10 shear groove, 11 clustered stud shear key. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1-4 As shown, an assembled corrugated steel web steel-concrete composite beam provided by an embodiment of the utility model comprises: a precast composite concrete top plate 1, a steel bottom plate 2 and a corrugated steel web support mechanism symmetrically arranged in the box beam, the precast composite concrete top plate 1 is provided with a shear groove 10 and a clustered bolt shear key 11, and the installation position is arranged directly above the flange frame 5; the corrugated steel web support mechanism comprises a perforated top plate cross beam 4, a flange frame 5, a flange small longitudinal beam 6, a top plate-web connector 9, a corrugated steel web 3, a steel brace 7 and a brace anchor plate 8.

[0025] Specifically in this embodiment, the perforated top plate cross beam 4 is an H-shaped cross-section steel member, and holes are opened on its two wings; the flange frame 5 is an H-shaped cross-section steel member, and through holes are provided at the positions of the two wings; the perforated top plate cross beam 4 passes through the corresponding through holes on the two wings of the flange frame 5, and is fixed together by welding at the penetration points.

[0026] Furthermore, the top plate-web connecting member 9 is an H-shaped steel member, the upper end of which abuts against the flange frame 5, the lower end of which abuts against the corrugated steel web 3, and is connected to the flange frame 5 and the corrugated steel web 3 by welding.

[0027] Furthermore, the small longitudinal beam 6 of the flange is a T-shaped steel member, and holes are opened at the center of the flanges on both sides of the T-shaped steel member, and the front and rear ends are respectively connected to the two perforated top plate cross beams 4 and fixed by welding.

[0028] Furthermore, the steel brace 7 is located in the box room, one side of which is connected to the perforated top plate cross beam 4, and the other side is connected to the steel bottom plate 2. The brace anchor plate 8 is a perforated steel plate, which supports the perforated top plate cross beam 4 and the steel brace 7.

[0029] Furthermore, the clustered stud shear keys 11 are installed in the shear grooves 10 , and the structural connection between the prefabricated composite concrete top plate 1 and the flange frame 5 is achieved through the clustered stud shear keys 11 .

[0030] Furthermore, the perforated top plate cross beam 4, flange frame 5, flange small longitudinal beam 6, diagonal brace anchor plate 8, top plate and web plate connector 9, shear groove 10 and clustered bolt shear key 11 can all be adapted and installed in the space reserved in the prefabricated composite concrete top plate 1, and combined into a whole by pouring high-strength grouting material 12.

[0031] Furthermore, the tangent value of the angle between the steel brace 7 and the horizontal plane is 2:3; the height of the brace anchor plate 8 is 0.6 to 0.8 times the thickness of the prefabricated composite concrete top plate 1.

[0032] Example 1

[0033] The utility model provides an assembled corrugated steel web steel-concrete composite beam. According to the dynamic characteristics of the corrugated steel web box beam structure, the utility model optimizes the structure of the easily deformed parts of the corrugated steel web box beam. The processing method is to form a steel frame through an open top plate cross beam 4, a flange frame 5, a flange small longitudinal beam 6, a steel brace 7 and a brace anchor plate 8, and use a top plate-web connector 9 to connect and fix it with the corrugated steel web 3, and then connect the prefabricated composite concrete top plate with the corrugated steel web support mechanism through a clustered bolt shear key, and finally pour high-strength grouting material to combine the open top plate cross beam, the flange frame, the flange small longitudinal beam, the brace anchor plate, the top plate-web connector, the shear groove, the clustered bolt shear key and the prefabricated composite concrete top plate into a whole, and perform secondary reinforcement on the weak parts of the corrugated steel web box beam, strengthen the anti-deformation ability of the corrugated steel web box beam in the transverse and longitudinal directions, reasonably use the symmetry of the structure, and improve the bearing capacity of the corrugated steel web box beam.

[0034] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An assembled corrugated steel web steel-concrete composite beam, characterized in that: include: A prefabricated composite concrete top plate (1), a steel bottom plate (2) and a corrugated steel web support mechanism symmetrically arranged in a box beam, wherein the prefabricated composite concrete top plate (1) is provided with a shear groove (10) and a clustered bolt shear key (11), and the installation position is arranged directly above the flange frame (5); the corrugated steel web support mechanism comprises a perforated top plate cross beam (4), a flange frame (5), a flange small longitudinal beam (6), a top plate-web connector (9), a corrugated steel web (3), a steel brace (7) and a brace anchor plate (8).

2. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The perforated top plate cross beam (4) is an H-shaped cross-section steel member, and has holes on its two wings; the flange frame (5) is an H-shaped cross-section steel member, and has through holes at the two wings; the perforated top plate cross beam (4) passes through the corresponding through holes on the two wings of the flange frame (5), and is fixedly connected together by welding at the penetration points.

3. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The top plate-web connecting member (9) is an H-shaped steel member, the upper end of which abuts against the flange frame (5), and the lower end abuts against the corrugated steel web (3), and is connected to the flange frame (5) and the corrugated steel web (3) by welding.

4. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The flange small longitudinal beam (6) is a T-shaped steel member, and holes are opened at the center of the flanges on both sides of the T-shaped steel member. The front and rear ends are respectively connected to the two perforated top plate cross beams (4) and fixed by welding.

5. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The steel brace (7) is located in the box chamber, one side of which is connected to the perforated top plate cross beam (4) and the other side of which is connected to the steel bottom plate (2); the brace anchor plate (8) is a perforated steel plate, which supports the perforated top plate cross beam (4) and the steel brace (7).

6. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The clustered bolt shear key (11) is installed in the shear groove (10), and the structural connection between the prefabricated composite concrete top plate (1) and the flange frame (5) is achieved through the clustered bolt shear key (11).

7. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The perforated top plate cross beam (4), flange frame (5), flange longitudinal beam (6), diagonal brace anchor plate (8), top plate-web plate connector (9), shear groove (10) and clustered bolt shear key (11) can all be adapted and installed in the reserved space in the prefabricated composite concrete top plate (1), and are combined into a whole by pouring high-strength grouting material (12).

8. The assembled corrugated steel web steel-concrete composite beam according to claim 1, characterized in that: The tangent value of the angle between the steel brace (7) and the horizontal plane is 2:3; the height of the brace anchor plate (8) is 0.6 to 0.8 times the thickness of the prefabricated composite concrete top plate (1).

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