I-shaped steel concrete composite beam

Abstract

The utility model discloses an I-shaped steel concrete composite beam which comprises an I-shaped steel beam and further comprises two prefabricated reinforced concrete beams which are symmetrically arranged in two grooves of the I-shaped steel beam and extend in the length direction, and each prefabricated reinforced concrete beam is a C-shaped beam with an outward opening. An upper transverse plate of the I-shaped steel beam and an upper transverse plate of each C-shaped beam are screwed and fixed through a plurality of sets of high-strength threaded fasteners; a vertical plate of the I-shaped steel beam and a vertical plate of each C-shaped beam are screwed and fixed through a plurality of sets of high-strength threaded fasteners; a lower transverse plate of the I-shaped steel beam and a lower transverse plate of each C-shaped beam are screwed and fixed through a plurality of sets of high-strength threaded fasteners; a straight-plate corrugated steel formwork is fixed to the top face of an upper transverse plate of the I-shaped steel beam through a plurality of high-strength threaded fasteners, and the high-strength threaded fasteners are fixed to a lower protruding plate of the straight-plate corrugated steel formwork in a threaded connection mode. The I-shaped steel concrete composite beam is high in site construction speed, short in construction period, high in construction efficiency, high in strength, good in rigidity and excellent in shear resistance and bending resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of building beam structures, and specifically relates to an I-shaped steel concrete composite beam. Background Art

[0002] The beams of existing buildings generally have three structures, each with its own deficiencies:

[0003] One is a pure steel beam, such as a pure I-shaped steel beam, also known as a pure H-shaped steel beam, which requires a large cross-section, relatively high material consumption, and high cost.

[0004] One is pure reinforced concrete, with a low reinforcement ratio, requiring a larger cross-section, and a long construction period.

[0005] In recent years, a composite beam or a combined beam has been gradually promoted, generally with an I-shaped steel beam as the skeleton, and reinforced concrete is cast in situ on the periphery or the top. Compared with the above two types of beams, there are obvious improvements, but there is a common deficiency. It must include the construction steps of cast-in-place reinforced concrete on site, and there are still problems such as slow on-site construction speed, long construction period, and low construction efficiency. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide an I-shaped steel concrete composite beam with fast on-site construction speed, short construction period, high construction efficiency, high strength, good stiffness, and excellent shear and bending resistance.

[0007] The technical solution of the utility model is to provide an I-shaped steel concrete composite beam, which includes an I-shaped steel beam, and also includes two precast reinforced concrete beams symmetrically arranged in the two grooves of the I-shaped steel beam and extending along the length direction. Each precast reinforced concrete beam is a C-shaped beam with an opening facing outwards; the upper flange plate of the I-shaped steel beam is fixedly connected by a plurality of sets of high-strength threaded fasteners to the upper transverse plate of each C-shaped beam; the web of the I-shaped steel beam is fixedly connected by a plurality of sets of high-strength threaded fasteners to the vertical plate of each C-shaped beam; the lower flange plate of the I-shaped steel beam is fixedly connected by a plurality of sets of high-strength threaded fasteners to the lower transverse plate of each C-shaped beam.

[0008] After adopting the above structure, the I-shaped steel concrete composite beam of the utility model has the following advantages:

[0009] The I-shaped steel concrete composite beam of the utility model overcomes the disadvantages of a pure steel beam, such as a pure I-shaped steel beam, which requires a large cross-section, relatively high material consumption, and high cost, and also overcomes the disadvantages of pure reinforced concrete, such as low reinforcement ratio, requiring a larger cross-section, and long construction period. It also overcomes the disadvantages of a composite beam that must be cast-in-place reinforced concrete on site, and still has problems such as slow on-site construction speed, long construction period, and low construction efficiency.

[0010] The I-shaped steel concrete composite beam of the utility model only needs to transport the I-shaped steel beam and two precast reinforced concrete beams, namely two C-shaped beams, which are pre-set with through holes for high-strength threaded fasteners such as high-strength threaded rods, to the site. Insert the high-strength threaded rods in the respective high-strength threaded fasteners into the coaxial and corresponding holes, screw the high-strength nuts at both ends onto the threads at both ends of the high-strength threaded rods, and then use an electric nut-tightening tool to tighten the high-strength nuts of the high-strength threaded fasteners one by one, so that the upper flange plate of the I-shaped steel beam and the upper transverse plate of each C-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners, the web of the I-shaped steel beam and the vertical plate of each C-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners, and the lower flange plate of the I-shaped steel beam and the lower transverse plate of each C-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners. The I-shaped steel concrete composite beam of the utility model does not need to build formwork on site, bind steel bars on site, pour reinforced concrete on site, or wait for the reinforced concrete to solidify to reach the predetermined strength. The on-site construction speed is fast, the construction period is short, and the construction efficiency is high.

[0011] The I-shaped steel concrete composite beam of the utility model has excellent shear resistance, bending resistance and ductility, high strength and good stiffness.

[0012] Furthermore, a straight plate corrugated steel formwork is fixed on the top surface of the upper flange plate of the I-shaped steel beam by multiple of the above-mentioned high-strength threaded fasteners, and the high-strength threaded fasteners are screwed and fixed with the lower convex plate of the straight plate corrugated steel formwork. After adopting the above structure, the steel formwork adopts a concave-convex sheet metal reinforcement structure, with relatively less material consumption, good support strength of the steel plate and good mechanical properties. Moreover, the high-strength fasteners for fastening the I-shaped steel beam and the precast reinforced concrete beam, namely the C-shaped beam, are used to fasten the straight plate corrugated steel formwork, without additionally increasing high-strength threaded fasteners, and relatively saving the material cost; after adopting the connection structure of the steel formwork and the beam, the connection between the beam and the steel formwork is more convenient and firm, and the full hall structure of the scaffolding for supporting the formwork is omitted, further ensuring the technical effects of fast on-site construction speed, short construction period and high construction efficiency of the I-shaped steel concrete composite beam of the utility model.

[0013] Furthermore, there is a row of multiple first screw through holes on each outer side of the upper flange plate of the I-shaped steel beam, and a row of multiple second screw through holes on the upper transverse plate of each C-shaped beam. The multiple first screw through holes in the two rows and the multiple second screw through holes in the two rows are all in one-to-one correspondence and coaxial. Multiple vertical first high-strength threaded rods are respectively accommodated in their respective first screw through holes and second screw through holes, and the two protruding ends of the first high-strength threaded rods are tightened by their respective first high-strength nuts. After adopting the above structure, the upper flange plate of the I-shaped steel beam and the two upper transverse plates of the C-shaped beam are screwed more conveniently and quickly by the high-strength threaded rods and the high-strength nuts at both ends, and the connection structure is more firm and reliable, further ensuring the technical effects of fast on-site construction speed, short construction period and high construction efficiency of the I-shaped steel concrete composite beam of the utility model, as well as excellent shear resistance, bending resistance and ductility, high strength and good stiffness.

[0014] Further, there is a row of multiple third screw through-holes on the web of the I-beam steel girder, and each vertical plate of each C-shaped beam has its own row of multiple fourth screw through-holes. The multiple fourth screw through-holes, the multiple third screw through-holes, and the multiple fourth screw through-holes all correspond one by one and are coaxial. Multiple transverse second high-strength screws are respectively received in their respective fourth screw through-holes, third screw through-holes, and fourth screw through-holes, and the two protruding ends of the transverse second high-strength screws are tightened by their respective second high-strength nuts. After adopting the above structure, the web of the I-beam steel girder and the two vertical plates of the C-shaped beam are more convenient and faster to be bolted by high-strength screws and high-strength nuts at both ends, and the connection structure is more firm and reliable, further ensuring the technical effects of fast on-site construction speed, short construction period, high construction efficiency, excellent shear resistance, bending resistance, and ductility performance, high strength, and good stiffness of the present I-beam concrete composite beam.

[0015] Further, there is a row of multiple fifth screw through-holes on each outer side of the lower flange plate of the I-beam steel girder, and each lower cross plate of each C-shaped beam has its own row of multiple sixth screw through-holes. The two rows of multiple fifth screw through-holes and the two rows of multiple sixth screw through-holes all correspond one by one and are coaxial. Multiple vertical third high-strength screws are respectively received in their respective fifth screw through-holes and sixth screw through-holes, and the two protruding ends of the third high-strength screws are tightened by their respective third high-strength nuts. After adopting the above structure, the lower flange plate of the I-beam steel girder and the two lower form plates of the C-shaped beam are more convenient and faster to be bolted by high-strength screws and high-strength nuts at both ends, and the connection structure is more firm and reliable, further ensuring the technical effects of fast on-site construction speed, short construction period, high construction efficiency, excellent shear resistance, bending resistance, and ductility performance, high strength, and good stiffness of the present I-beam concrete composite beam.

[0016] Further, the I-beam concrete composite beam of the present utility model further includes a side sealing plate detachably fixed on both outer sides and closing the two openings; a pipeline extending along the length direction is received in one opening or two openings of the C-shaped beam. After adopting the above structure, on the premise of ensuring high strength, good stiffness, and excellent shear resistance, bending resistance, and ductility performance of the present I-beam concrete composite beam, the I-beam concrete composite beam is made lightweight, and has a better accommodation space for power wires, communication cables, and water supply and gas pipelines required for building houses, reflecting the unique advantages of the present I-beam concrete composite beam from another aspect, and the setting of the two side sealing plates has the technical effect of beautiful appearance.

[0017] Further, the height of each side sealing plate is equal to the height of each C-shaped beam. There are multiple first screw through holes on each side sealing plate, and multiple first threaded holes coaxial with the first screw through holes on each C-shaped beam. A plurality of first screws are respectively received in the first screw through holes and tightened in the first threaded holes. With the above specific structure, the assembly or disassembly of the side sealing plate and the C-shaped beam is more convenient and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the I-shaped steel concrete composite beam of the present utility model Figure 1 (left view).

[0019] Figure 2 is Figure 1 an enlarged schematic structural view of A in

[0020] Figure 3 is a schematic structural view of the I-shaped steel concrete composite beam in the present utility model Figure 2 (front view; one side sealing plate is omitted).

[0021] Figure 4 is Figure 3 an enlarged schematic structural view of B in

[0022] Figure 5 is an exploded schematic structural view of the I-shaped steel concrete composite beam of the present utility model (only a few of the high-strength screws, high-strength nuts and screws are exploded and the screw and the nut are not exploded; only a few screws are exploded; Figure 1 、 Figure 3 and Figure 5 the lengths of are all shown in an omitted drawing method).

[0023] As shown in the figure:

[0024] 1. I-shaped steel beam, 11. Groove, 12. Upper flange plate of the I-shaped steel beam, 121. First screw through hole, 13. Web of the I-shaped steel beam, 131. Third screw through hole, 14. Lower flange plate of the I-shaped steel beam, 141. Fifth screw through hole;

[0025] 2. C-shaped beam, 21. Opening, 22. Upper cross plate of the C-shaped beam, 221. Second screw through hole, 23. Vertical plate of the C-shaped beam, 231. Fourth screw through hole, 24. Lower cross plate of the C-shaped beam, 241. Sixth screw through hole, 25. First threaded hole;

[0026] 3. Straight plate corrugated steel formwork, 31. Upper convex plate, 32. Transition vertical plate, 33. Lower convex plate, 331. Seventh screw through hole;

[0027] 4. Reinforced concrete floor slab;

[0028] 5. High-strength threaded fasteners, 51. First high-strength screw rod, 52. First high-strength nut, 53. Second high-strength screw rod, 54. Second high-strength nut, 55. Third high-strength screw rod, 56. Third high-strength nut;

[0029] 6. Side sealing plate, 61. First screw through hole;

[0030] 7. Pipe;

[0031] 8. First screw. Specific embodiments

[0032] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted here that the description of these specific embodiments is used to help understand the present invention, but does not constitute a limitation on the present invention. In addition, the technical features involved in the following specific embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0033] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown.

[0034] The I-shaped steel-concrete composite beam of the present invention includes an I-shaped steel beam 1, and further includes two precast reinforced concrete beams symmetrically arranged in the two grooves 11 of the I-shaped steel beam 1 and extending along the length direction. Each precast reinforced concrete beam is a U-shaped beam 2 with an opening 21 facing outwards. The upper flange plate 12 of the I-shaped steel beam is fixedly connected by screwing with the upper cross plate 22 of each U-shaped beam through multiple sets of high-strength threaded fasteners 5; the web 13 of the I-shaped steel beam is fixedly connected by screwing with the vertical plate 23 of each U-shaped beam through multiple sets of high-strength threaded fasteners 5; the lower flange plate 14 of the I-shaped steel beam is fixedly connected by screwing with the lower cross plate 24 of each U-shaped beam through multiple sets of high-strength threaded fasteners 5. It is not difficult to understand that the outer wall of each U-shaped beam 2 is in close contact with the wall of the groove 11 of the I-shaped steel beam 1: the upper surface of each U-shaped beam 2 is in close contact with the bottom surface of the upper flange plate 12 of the I-shaped steel beam, the inner vertical surface of each U-shaped beam 2 is in close contact with the vertical surface of the web 13 of the I-shaped steel beam, and the lower surface of each U-shaped beam 2 is in close contact with the bottom surface of the lower flange plate 14 of the I-shaped steel beam.

[0035] The top surface of the upper flange plate 12 of the I-shaped steel beam is fixed with a straight plate corrugated steel formwork 3 by using multiple sets of the high-strength threaded fasteners 5, and the high-strength threaded fasteners 5 are fixedly connected by screwing with the lower convex plate 33 of the straight plate corrugated steel formwork 3. For example, the first high-strength screw rod 51 in each row below can be spaced to fix the lower convex plate 33. The first high-strength screw rod 51 for fixing the lower convex plate 33 extends upward for a section, and the extended section passes through the seventh screw through hole 331 of the lower convex plate 33 and is accommodated in the seventh screw through hole 331, and the first high-strength nut 52 is tightened by screwing on the external thread of the extended section.

[0036] The straight plate corrugated steel formwork 3 can be a steel formwork formed by sequentially connecting the upward convex plate 31, the transition vertical plate 32 or the vertical connecting plate, and the downward convex plate 33 and extending in a cycle. The cross-section of the straight plate corrugated steel formwork 3 can be similar to the cross-section of the steel sheet pile used for the foundation pit retaining pile.

[0037] It is not difficult to understand that a reinforced concrete floor slab 4 is cast in place at the top of the straight plate corrugated steel formwork 3. The steel bars of the reinforced concrete floor slab 4 can be welded and fixed to the straight plate corrugated steel formwork 3. After adopting the structure of the straight plate corrugated steel formwork 3 and the reinforced concrete floor slab 4, the integrity of the floor slab and the cross beam is good, the connection is convenient and firm, and the full hall structure of the supporting formwork is omitted.

[0038] A preferred embodiment of the connection and fixation between the I-shaped steel beam 1 and the two precast reinforced concrete beams, namely the C-shaped beams 2, is as follows:

[0039] On both outer sides of the upper flange plate 12 of the I-shaped steel beam, there are respective rows, each row having a plurality of first screw holes 121. On the upper cross plate 22 of each C-shaped beam, there are respective rows, each row having a plurality of second screw holes 221. The plurality of first screw holes 121 in the two rows and the plurality of second screw holes 221 in the two rows are all in one-to-one correspondence and coaxial. A plurality of vertical first high-strength screws 51 are respectively accommodated in their respective first screw holes 121 and second screw holes 221. The two protruding ends of the first high-strength screw 51 are fastened by their respective first high-strength nuts 52.

[0040] The web 13 of the I-shaped steel beam has a row, each row having a plurality of third screw holes 131. The vertical plates 23 of each C-shaped beam have respective rows, each row having a plurality of fourth screw holes 231. The plurality of fourth screw holes 231, the plurality of third screw holes 131, and the plurality of fourth screw holes 231 are all in one-to-one correspondence and coaxial. A plurality of horizontal second high-strength screws 53 are respectively accommodated in their respective fourth screw holes 231, third screw holes 131, and fourth screw holes 231. The two protruding ends of the horizontal second high-strength screw 53 are fastened by their respective second high-strength nuts 54.

[0041] On both outer sides of the lower flange plate 14 of the I-shaped steel beam, there are respective rows, each row having a plurality of fifth screw holes 141. On the lower cross plate 24 of each C-shaped beam, there are respective rows, each row having a plurality of sixth screw holes 241. The plurality of fifth screw holes 141 in the two rows and the plurality of sixth screw holes 241 in the two rows are all in one-to-one correspondence and coaxial. A plurality of vertical third high-strength screws 55 are respectively accommodated in their respective fifth screw holes 141 and sixth screw holes 241. The two protruding ends of the third high-strength screw 55 are fastened by their respective third high-strength nuts 56.

[0042] It is not difficult to understand that, as described above, the upper flange plates 12 of the I-shaped steel beams have one row each, that is, two rows, and the lower flange plates 14 of the I-shaped steel beams have one row each, that is, two rows; there is one row on the web 13 of the I-shaped steel beam, one row on the upper cross plate 22 of the C-shaped plate, one row on the vertical plate 23 of the C-shaped plate, and one row on the lower cross plate 24 of the C-shaped plate.

[0043] The multiple sets of high-strength threaded fasteners 5 in one row as described above can be understood as more than a dozen sets, dozens of sets, more than a hundred and dozens of sets, etc., or can also be understood as several sets. For example, one first high-strength screw 51 and two first high-strength nuts 52 are a set. The multiple sets in each row of the upper flange plates 12 of the I-shaped steel beam and the upper cross plates 22 of the two C-shaped beams can be more than a dozen sets, dozens of sets, more than a hundred and dozens of sets, etc., or can also be understood as several sets. Another example is that one second high-strength screw 53 and two second high-strength nuts 54 are a set. The multiple sets in each row of the web 13 of the I-shaped steel beam and the vertical plates 23 of the two C-shaped beams can be more than a dozen sets, dozens of sets, more than a hundred and dozens of sets, etc., or can also be understood as several sets. Still another example is that one third high-strength screw 55 and two third high-strength nuts 56 are a set. The multiple sets in each row of the lower flange plates 14 of the I-shaped steel beam and the lower cross plates 24 of the two C-shaped beams can be more than a dozen sets, dozens of sets, more than a hundred and dozens of sets, etc., or can also be understood as several sets. It is not difficult to understand that the number of screw through holes corresponding to each high-strength screw in each row is the same as the number of high-strength screws in each row as described above.

[0044] The I-shaped steel-concrete composite beam of the present invention may further include a respective side sealing plate 6 detachably fixed on the two outsides and sealing the two openings 21, also called the two C-shaped notches. A pipeline extending in the length direction (only the pipe 7 is shown in the figure and the wire is not shown) is disposed in one opening 21, that is, the C-shaped notch, or two openings 21, that is, the C-shaped notches, of the C-shaped beam 2.

[0045] The height of each side sealing plate 6 may be equal to the height of each C-shaped beam 2. There are a plurality of first screw through holes 61 on each side sealing plate 6, and a plurality of first threaded holes 25 coaxial with the first screw through holes 61 on each C-shaped beam 2. A plurality of first screws 8 are respectively received in the first screw through holes 61 and tightened in the first threaded holes 25.

[0046] It is not difficult to understand that since the first screw 8 is not a load-bearing screw and only needs to connect the side sealing plate 6 to the C-shaped beam 2, ordinary screws are used instead of high-strength screws, and the number in each row can be one-third or one-fourth, etc. of the number of high-strength screws in each row. The plurality of first screws 8 can also be understood as several.

[0047] This composite beam can also be called a composite girder. The upper flange plate 12 of the I-beam 1 can also be called the upper transverse plate of the I-beam, the web 13 of the I-beam can also be called the vertical plate of the I-beam, and the lower flange plate 14 of the I-beam can also be called the lower transverse plate of the I-beam. The I-shaped steel is also called H-shaped steel or H-section steel, and the I-beam 1 is also called H-shaped steel girder or H-section steel girder. The I-beam 1 can also be called the main I-beam, and the two precast reinforced concrete beams can also be called precast reinforced concrete auxiliary beams or secondary beams. Vertically can be called vertically, perpendicularly or plumb. Horizontally can be called horizontally. The C-shaped beam 2 can also be called the C-shaped beam. The C-shaped notch is also called the C-shaped notch or C-shaped opening. A row can also be understood as a row. The high-strength screw is accommodated in the screw through-hole, and it can also be understood that the high-strength screw passes through the screw through-hole. The high-strength screw is also called a high-strength bolt. The high-strength screw and the high-strength nut are both commercially available products or called commercially available products.

[0048] The components, structures, quantities, etc. not marked above are not shown in the drawings. The drawings are only schematic. If there are inconsistencies between the drawings and the text description or between the drawings themselves, the text description shall prevail.

[0049] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An I-beam concrete composite beam, comprising an I-beam, characterized in that: It also includes two prefabricated reinforced concrete beams which are symmetrically arranged in the two grooves of the I-beam and extended along the length direction, each prefabricated reinforced concrete beam is a U-shaped beam opening outward; the upper flange plate of the I-beam and the upper cross plate of each U-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners; the web plate of the I-beam and the vertical plate of each U-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners; the lower flange plate of the I-beam and the lower cross plate of each U-shaped beam are screwed and fixed by multiple sets of high-strength threaded fasteners.

2. The I-beam concrete composite beam according to claim 1, characterized in that: The top surface of the upper flange plate of the I-beam is fixed with a straight plate corrugated steel formwork by using a plurality of the high-strength threaded fasteners, and the high-strength threaded fasteners are screwed and fixed with the lower convex plate of the straight plate corrugated steel formwork.

3. The I-beam concrete composite beam according to claim 1, characterized in that: Both outer sides of the upper flange plate of the I-beam have a row of multiple first screw holes in each row, and the upper cross plate of each U-shaped beam has a row of multiple second screw holes in each row. The two rows of multiple first screw holes correspond one to one and are coaxial with the two rows of multiple second screw holes. Multiple vertical first high-strength screws are accommodated one by one in their respective first screw holes and second screw holes, and the two protruding ends of the first high-strength screws are fastened by their respective first high-strength nuts.

4. The I-beam concrete composite beam according to claim 1, characterized in that: The web of the I-beam has a row of multiple third screw holes in each row, and the vertical plate of each U-shaped beam has its own row of multiple fourth screw holes in each row. The multiple fourth screw holes, the multiple third screw holes and the multiple fourth screw holes correspond one to one and are coaxial. Multiple transverse second high-strength screws are accommodated one to one in their respective fourth screw holes, third screw holes and fourth screw holes, and the two protruding ends of the transverse second high-strength screws are fastened by their respective second high-strength nuts.

5. The I-beam concrete composite beam according to claim 1, characterized in that: Both outer sides of the lower flange plate of the I-beam have a row of multiple fifth screw holes in each row, and the lower cross plate of each U-shaped beam has a row of multiple sixth screw holes in each row. The two rows of multiple fifth screw holes correspond one to one and are coaxial with the two rows of multiple sixth screw holes. Multiple vertical third high-strength screws are accommodated one by one in their respective fifth screw holes and sixth screw holes, and the two protruding ends of the third high-strength screws are fastened by their respective third high-strength nuts.

6. The I-beam concrete composite beam according to claim 1, characterized in that: It also includes a side sealing plate which is detachably fixed on the two outer sides and seals the two openings; a pipeline extending along the length direction is placed in one opening or in the two openings of the U-shaped beam.

7. The I-beam concrete composite beam according to claim 6, characterized in that: The height of each side sealing plate is equal to the height of each U-shaped beam. Each side sealing plate is provided with a plurality of first screw through holes. Each U-shaped beam is provided with a plurality of first threaded holes coaxial with the first screw through holes. The plurality of first screws are accommodated in the first screw through holes one by one and tightened in the first threaded holes.

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