Corrugated steel web composite beam

Abstract

The utility model discloses a corrugated steel web composite beam which comprises a pair of corrugated steel webs which are symmetrically arranged, and each corrugated steel web is formed by welding a top thick plate section, a middle thin plate section and a bottom thick plate section. Horizontal steel top plates are fixedly connected to the top thick plate section in a welded mode, concrete bridge deck slabs are connected to the two horizontal steel top plates through shear force pieces respectively, and the two concrete bridge deck slabs are connected into a whole through a wet joint. Horizontal steel bottom plates are fixedly connected to the bottom edge of the bottom thick plate section in a welded mode, and the two horizontal steel bottom plates are connected into a whole through a horizontally-arranged connecting steel plate. The shear part comprises a pair of connecting vertical plates perpendicularly welded and fixed to the horizontal steel top plate, a plurality of pairs of vertical holes are evenly formed in the top edges of the two connecting vertical plates in the length direction at intervals, the lower ends of the vertical holes extend towards the same side to form transverse holes, and concrete embedded steel bars are horizontally arranged in each pair of transverse holes. The utility model has the advantages that the supporting and fixing strength and the bearing capacity can be improved, the installation procedure of the concrete embedded steel bar is saved, and the operation process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of steel-concrete composite beams, in particular to a corrugated steel web composite beam capable of reducing the risk of damage during construction and operation. Background Art

[0002] Corrugated steel web composite beams are widely used in the engineering field due to their good mechanical properties and economy. However, in existing corrugated steel web composite beams, the connection parts between the corrugated steel web and the top plate and bottom plate are simultaneously subjected to shear stress and bending normal stress, and the bending normal stress of the corrugated steel web is often ignored in the design. Therefore, local damage of the corrugated steel web is likely to occur, posing certain potential safety hazards.

[0003] In addition, in order to achieve reliable connection between the concrete bridge deck and the corrugated steel web, shear connectors connected to the concrete bridge deck need to be provided on the top plate connected to the top edge of the corrugated steel web. Most of the existing shear connectors adopt the form of opening holes on the vertical plate. At this time, the transverse steel bars poured into the concrete bridge deck need to be inserted into the holes one by one first, and then bundled and subsequent concrete pouring is carried out, resulting in time-consuming and laborious perforation operation of the steel bars, cumbersome on-site work, and affecting the construction speed. Summary of the Invention

[0004] The purpose of the utility model is to provide a corrugated steel web composite beam aiming at the defects of the prior art, which can improve the construction speed and reduce the risk of damage during construction and operation.

[0005] To achieve the above purpose, the utility model can adopt the following technical solutions:

[0006] The corrugated steel web composite beam described in the utility model includes a pair of symmetrically arranged corrugated steel webs, and the corrugated steel webs are welded in sequence from top to bottom by a top thick plate section, a middle thin plate section and a bottom thick plate section; a horizontal steel top plate is welded and fixed on the top edge of the top thick plate section, and concrete bridge decks are respectively connected to the two horizontal steel top plates through shear connectors, and the two concrete bridge decks are connected into one body through a horizontally arranged wet joint. A horizontal steel bottom plate is welded and fixed on the bottom edge of the bottom thick plate section, and the two horizontal steel bottom plates are connected into one body through a horizontally arranged connecting steel plate to form a combined beam section with a box structure; wherein, the shear connector includes a pair of connecting vertical plates vertically welded and fixed on the top surface of the horizontal steel top plate, the length directions of the two connecting vertical plates are the same as the length direction of the horizontal steel top plate, and a plurality of pairs of vertical holes are evenly spaced along the length direction on the top edges of the two connecting vertical plates. The lower ends of the vertical holes extend and open towards the same side to form transverse holes, and a concrete embedded steel bar placed into the transverse hole from the vertical hole is horizontally arranged in each pair of transverse holes.

[0007] Specifically, the overall height h of the corrugated steel web is 200 - 600 cm. Among them, the heights of the top thick plate section and the bottom thick plate section are the same, both being 0.05 - 0.1 times the height of the corrugated steel web, and the thicknesses of the top thick plate section and the bottom thick plate section are 20 - 30 mm, while the thickness of the middle thin plate section is 10 - 20 mm.

[0008] Furthermore, the plate widths of the horizontal steel top plate and the horizontal steel bottom plate are greater than or equal to 500 mm, and the plate thicknesses are 14 - 40 mm. The thickness of the connecting steel plate is the same as that of the horizontal steel bottom plate.

[0009] Furthermore, the thicknesses of the two connecting vertical plates are greater than or equal to 12 mm, and the distance between them is greater than or equal to 2 times the plate height; the distance between two adjacent vertical holes on each connecting vertical plate is 150 - 250 mm, and the hole widths of each vertical hole and each horizontal hole are the same, both being 1.2 times the diameter of the concrete embedded steel bars.

[0010] The advantages of the present utility model are as follows: By adopting corrugated steel webs with unequal thicknesses, the welding strength with the horizontal steel top plate and the horizontal steel bottom plate can be improved, thereby reducing the risk of damage caused by stress concentration at the connection, and enhancing the fixing strength and bearing capacity of the box - type structure composite beam segment surrounded by the corrugated steel web, the horizontal steel top plate, the concrete bridge deck, the wet joint, the horizontal steel bottom plate and the connecting steel plate; in addition, the shear connectors provided on the horizontal steel top plate can also ensure reliable anti - pulling ability with the concrete bridge deck, and can easily place the overall bundled concrete embedded steel bars into the horizontal holes together, saving the installation process of the concrete embedded steel bars, simplifying the operation process, reducing the workload, and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model.

[0012] Figure 2 is Figure 1 an enlarged view of the left - hand corrugated steel web in

[0013] Figure 3 is Figure 1 an axonometric view of the shear connector in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0016] As Figures 1-3 shown, the corrugated steel web composite beam of the present utility model includes a pair of symmetrically arranged corrugated steel webs 1. Each corrugated steel web 1 is welded from top to bottom in sequence by a top thick plate section 1.1, a middle thin plate section 1.2, and a bottom thick plate section 1.3. Its overall height h is 200 - 600 cm. Among them, the top thick plate section 1.1 and the bottom thick plate section 1.3 have the same height, both being 0.05 - 0.1 times the overall height h of the corrugated steel web 1, and the thickness of the top thick plate section 1.1 and the bottom thick plate section 1.3 is 20 - 30 mm, while the thickness of the middle thin plate section 1.2 is 10 - 20 mm.

[0017] On the top edges of the top thick plate sections 1.1 of the two corrugated steel webs 1, a horizontal steel roof plate 2 is respectively welded and fixed. The plate thickness of the horizontal steel roof plate 2 is 14 - 40 mm, and the plate width is greater than or equal to 500 mm. On the two horizontal steel roof plates 2, a concrete bridge deck 4 is respectively connected through shear connectors 3. The two concrete bridge decks 4 are connected into one body through a horizontally arranged wet joint 5. On the bottom edges of the bottom thick plate sections 1.3 of the two corrugated steel webs 1, a horizontal steel bottom plate 6 is respectively welded and fixed. The plate thickness of the horizontal steel bottom plate 6 is 14 - 40 mm, and the plate width is greater than or equal to 500 mm. The two horizontal steel bottom plates 6 are connected into one body through a horizontally arranged connecting steel plate 7. The thickness of the connecting steel plate 7 is the same as that of the horizontal steel bottom plate 6. The corrugated steel web 1, the horizontal steel roof plate 2, the concrete bridge deck 4, the wet joint 5, the horizontal steel bottom plate 6, and the connecting steel plate 7 jointly enclose a box - shaped composite beam segment. Adjacent composite beam segments are spliced together to form the entire corrugated steel web composite beam.

[0018] In addition, the shear connector 3 should include a pair of parallel connecting vertical plates 3.1 vertically welded and fixed on the top surface of the horizontal steel roof plate 2. The length direction of the two connecting vertical plates 3.1 is the same as the length direction of the horizontal steel roof plate 2, and its thickness is greater than or equal to 12 mm. The distance between the two connecting vertical plates 3.1 is greater than or equal to 2 times its plate height. Along the length direction on the top edges of the two connecting vertical plates 3.1, a plurality of pairs of vertical holes 3.2 are evenly spaced. The distance between adjacent two vertical holes 3.2 on each connecting vertical plate 3.1 is 150 - 250 mm. The lower ends of all vertical holes 3.2 extend to the same side to form a horizontal hole 3.3. In each pair of horizontal holes 3.3, a concrete embedded steel bar 3.4 placed into it from the vertical hole 3.2 is horizontally arranged. The hole width of each vertical hole 3.2 and each horizontal hole 3.3 is the same, both being 1.2 times the diameter of the concrete embedded steel bar 3.4.

[0019] Due to the use of the corrugated steel web 1 with unequal thicknesses in the composite beam with corrugated steel webs of the above structure, the welding strength between it and the horizontal steel top plate 2 and the horizontal steel bottom plate 6 can be improved, thereby reducing the risk of damage caused by stress concentration at the connection, and enhancing the fixing strength and load-bearing capacity of the box-shaped structure composite beam segment enclosed by the corrugated steel web 1, the horizontal steel top plate 2, the concrete bridge deck 4, the wet joint 5, the horizontal steel bottom plate 6 and the connecting steel plate 7; at the same time, the shear connectors 3 provided on the horizontal steel top plate 2 can also ensure reliable anti-pulling ability with the concrete bridge deck 4, easily realizing that the integral binding of the concrete embedded steel bars 3.4 is put into the vertical holes 3.2 together and horizontally pushed into the horizontal holes 3.3, saving the installation process of the concrete embedded steel bars 3.4, simplifying the operation process, reducing the workload and improving the construction efficiency.

[0020] Taking a 5×40m composite beam with corrugated steel webs of a certain span as an example, its construction process is as follows:

[0021] Step 1: Use a 1600-type straight web as the corrugated steel web 1, and its overall height h is 202 cm. The top thick plate section 1.1, the middle thin plate section 1.2 and the bottom thick plate section 1.3 are welded in sequence from top to bottom. Among them, the heights of the top thick plate section 1.1 and the bottom thick plate section 1.3 are both 20.2 cm, the thicknesses are both 24 mm, the height of the middle thin plate section 1.2 is 161.6 cm, and the thickness is 12 mm.

[0022] Step 2: Weld and fix the horizontal steel top plate 2 along the top edge of the top thick plate section 1.1 of the corrugated steel web 1, and weld and fix the horizontal steel bottom plate 6 along the bottom edge of the bottom thick plate section 1.3 of the corrugated steel web 1 to form an I-beam. Among them, the plate thicknesses of the horizontal steel top plate 2 and the horizontal steel bottom plate 6 are both 40 mm, and the plate widths are both 500 mm.

[0023] Step 3: Cut out two connecting vertical plates 3.1 with a plate thickness of 20 mm and a plate height of 150 mm in the factory. A plurality of pairs of vertical holes 3.2 are evenly spaced along the length direction on the top edges of the two connecting vertical plates 3.1. The hole width of the vertical holes 3.2 is 30 mm, the spacing is 160 mm, and the lower ends of all the vertical holes 3.2 extend to the same side to open horizontal holes 3.3. The hole width of the horizontal holes 3.3 is 30 mm, and the length is 70 mm.

[0024] Step 4: Vertically weld and fix a pair of parallel connecting vertical plates 3.1 on the top surface of the horizontal steel top plate 2. The length direction of the two connecting vertical plates 3.1 is the same as the length direction of the horizontal steel top plate 2, and the distance between the two connecting vertical plates 3.1 is 300 mm.

[0025] Step Five: Bind the steel bar framework of the concrete bridge deck. The steel bar framework contains embedded concrete steel bars 3.4 that are adapted to the vertical holes 3.2 and the horizontal holes 3.3. The diameter of the embedded concrete steel bars 3.4 is 25 mm. Then, place the embedded concrete steel bars 3.4 in the steel bar framework from the upper end of the vertical holes 3.2 on the connecting vertical plate 3.1, and then horizontally push the steel bar framework to move the embedded concrete steel bars 3.4 to the inside of the horizontal holes 3.3.

[0026] Step Six: Pour the concrete bridge deck and cure it for 28 days to obtain shear connectors with reliable anti-pulling ability and a bridge deck with reliable load-bearing capacity. Among them, the flange cantilever length of the concrete bridge deck is 135 cm, the thickness at the cantilever end is 15 cm, the thickness at the cantilever root is 40 cm, and the thickness of the middle concrete bridge deck is 24 cm.

[0027] Step Seven: Weld connecting steel plates 7 between the horizontal steel bottom plates 6 at the bottom of two I-beams composed of corrugated steel webs 1, horizontal steel top plates 2, and horizontal steel bottom plates 6. The thickness of the connecting steel plates 7 is 40 mm, the plate width is 430 cm, and it is horizontally welded and fixed between the two horizontal steel bottom plates 6 to form an open composite box girder segment.

[0028] Step Eight: Pour the wet joint 5. The thickness of the wet joint 5 is 24 cm and the length is 280 cm to connect the two groups of concrete bridge decks into one body to form a closed composite box girder segment.

[0029] Step Nine: Splice adjacent closed composite box girder segments to form the entire corrugated steel web composite beam.

Claims

1. A composite beam with corrugated steel webs, characterized in that: It comprises a pair of symmetrically arranged corrugated steel webs, which are welded in sequence from top to bottom by a top thick plate section, a middle thin plate section and a bottom thick plate section; a horizontal steel top plate is welded and fixedly connected on the top edge of the top thick plate section, and the two horizontal steel top plates are respectively connected with concrete bridge decks through shear members, and the two concrete bridge decks are connected as a whole through a horizontally arranged wet joint; a horizontal steel bottom plate is welded and fixedly connected on the bottom edge of the bottom thick plate section, and the two horizontal steel bottom plates are connected as a whole through a horizontally arranged connecting steel plate, so as to form a combined beam section of a box-type structure; wherein the shear member comprises a pair of connecting vertical plates vertically welded and fixedly fixed on the top surface of the horizontal steel top plate, the length direction of the two connecting vertical plates is consistent with the length direction of the horizontal steel top plate, and a plurality of pairs of vertical holes are evenly spaced along the length direction of the top edges of the two connecting vertical plates, and the lower ends of the vertical holes extend to the same side to form transverse holes, and each pair of the transverse holes is horizontally provided with concrete embedded steel bars inserted from the vertical holes.

2. The corrugated steel web composite beam according to claim 1, characterized in that: The overall height h of the corrugated steel web is 200~600cm, wherein the heights of the top thick plate section and the bottom thick plate section are consistent, both being 0.05~0.1 times the height of the corrugated steel web, and the thicknesses of the top thick plate section and the bottom thick plate section are 20~30mm, and the thickness of the middle thin plate section is 10~20mm.

3. The corrugated steel web composite beam according to claim 1, characterized in that: The width of the horizontal steel top plate and the horizontal steel bottom plate is greater than or equal to 500 mm, the thickness is 14~40 mm, and the thickness of the connecting steel plate is consistent with the thickness of the horizontal steel bottom plate.

4. The corrugated steel web composite beam according to claim 1, characterized in that: The thickness of the two connecting vertical plates is greater than or equal to 12 mm, and the distance between them is greater than or equal to twice the height of the plates.

5. The corrugated steel web composite beam according to claim 4, characterized in that: The spacing between two adjacent vertical holes on each connecting vertical plate is 150-250 mm, and the hole widths of each vertical hole and each horizontal hole are consistent, both being 1.2 times the diameter of the concrete embedded steel bars.

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