Large-span composite beam prefabricated part capable of achieving reliable transportation and hoisting, composite beam and building structure
By prefabricating truss reinforced concrete structures in the factory and forming large-span superimposed beams in combination with cast-in-place technology, the problem of limited length of prefabricated beams is solved, and reliable transportation and hoisting of large-span superimposed beams is achieved.
Patent Information
- Application Number
- CN202411644200.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-02-14
AI Technical Summary
During the construction of large spans, existing prefabricated beams are difficult to achieve reliable transportation and hoisting due to their own structural limitations and limited lengths, resulting in the inability to use prefabricated beam or overlapping beam processes, which brings inconvenience to construction.
The prefabricated truss reinforced concrete lower chord, upper chord and vertical belly rod structure are used to prefabricate large-span superimposed beams in the factory, and the cast-in-place part is formed through the cast-in-place process to form a reliable truss system.
Reliable transportation and hoisting of prefabricated parts of large-span superimposed beams is achieved, the rigidity and stability of the structure are ensured, and the problem of limited length of prefabricated beams is solved.
Smart Images
Figure CN119434540A_ABST
Abstract
Description
Technical Field
[0001] The invention discloses a composite beam prefabricated component, in particular to a large-span composite beam prefabricated component, a composite beam and a building structure which can realize reliable transportation and hoisting, and belongs to the technical field of construction engineering. Background Art
[0002] Prefabricated building parts refer to building components that are pre-manufactured in factories or production facilities. After completion, these components will be transported to the construction site for assembly and installation. Prefabricated parts usually include various types of components, such as wall panels, floor slabs, beams, columns, etc.
[0003] Prefabricated parts usually adopt standardized design and production processes, which can be mass-produced to ensure the consistency and quality of components. Since prefabricated parts are manufactured in the factory and only need to be assembled on site, the construction period is significantly shortened, the complexity and manpower requirements of on-site construction are reduced, and safety is improved. The factory environment is easy to carry out strict quality control, and the components produced are relatively stable, reducing the problem of construction quality affected by factors such as weather. In addition, the prefabrication process can make more effective use of raw materials and reduce construction waste.
[0004] Prefabricated beams are typical components commonly used in construction. They are usually manufactured in factories and then transported to construction sites for installation. They play an indispensable role in construction projects. Affected by the structure of the prefabricated beams themselves, considering the factors such as force, load-bearing, its own weight and the convenience of transportation, on the one hand, the volume of the prefabricated beams cannot be made too large, or more precisely, the thickness of the prefabricated beams cannot be made too thick, otherwise it will affect the hoisting and transportation due to its own weight; on the other hand, because its thickness cannot be too thick, considering the influence of its own structure, the length of the prefabricated beams is limited. If it is made too long, it may be easy to break or be damaged during the hoisting and transportation process due to its own structure. Therefore, the length of the prefabricated beams will be affected to a certain extent. When large-span construction is required, usually only cast-in-place technology can be used, and prefabricated beams or composite beams cannot be used, which causes certain inconveniences to the construction. Summary of the invention
[0005] In view of the above-mentioned shortcomings of the precast beams in the prior art that are affected by the structure and have limited length, the present invention provides a large-span composite beam prefabricated part, a composite beam and a building structure that can be reliably transported and hoisted. The precast beam adopts a precast truss reinforced concrete lower chord, a precast truss steel upper chord and a precast truss steel vertical web structure, which can realize the prefabrication of the large-span composite beam prefabricated part in the factory, thereby solving the above-mentioned problem.
[0006] The technical solution adopted by the present invention to solve its technical problem is: a large-span prefabricated composite beam that can be reliably transported and hoisted, the prefabricated composite beam comprising a prefabricated truss reinforced concrete lower chord, a prefabricated truss reinforced concrete upper chord and a prefabricated truss reinforced vertical web member, the prefabricated truss reinforced concrete upper chord is fixedly arranged above the prefabricated truss reinforced concrete lower chord, and the prefabricated truss reinforced vertical web member is fixedly arranged inside the prefabricated truss reinforced concrete lower chord.
[0007] A composite beam using large-span composite beam prefabricated parts that can be reliably transported and hoisted as described above, the composite beam comprising a prefabricated composite beam part and a cast-in-place composite beam part formed on the prefabricated composite beam part by a cast-in-place process, the prefabricated composite beam part and the cast-in-place composite beam part together constitute the composite beam, a supporting structure for supporting a floor slab is fixedly arranged on one or both sides of the composite beam, the supporting structure adopts a connecting support or a cantilever, and the connecting support is fixedly installed with the composite beam by through-through fastening bolts.
[0008] A building structure using the composite beam as mentioned above, the building structure includes a longitudinal support structure, a composite beam and a floor slab, the composite beam is overlapped on the longitudinal support structure, the floor slab is overlapped on the composite beam, the longitudinal support structure adopts frame columns or walls, adjacent frame columns can also be provided with hidden beams between columns, the floor slab includes a prefabricated floor slab layer and a cast-in-place floor slab layer, the prefabricated floor slab layer is overlapped on the composite beam or the supporting structure of the composite beam, the prefabricated floor slab layer is provided with longitudinal reinforcement of the composite cast-in-place layer, the joints between adjacent prefabricated floor slab layers are provided with additional reinforcement for joints, a cast-in-place floor slab layer is formed on the prefabricated floor slab layer by a cast-in-place process, and the prefabricated floor slab layer and the cast-in-place floor slab layer together constitute the floor slab.
[0009] The technical solution adopted by the present invention to solve the technical problem further includes: The prefabricated truss reinforced concrete lower chord comprises a beam bottom reinforcement, stirrups and a concrete pouring layer, the beam bottom reinforcement is arranged along the length direction of the prefabricated truss reinforced concrete lower chord, the stirrups are perpendicular to the length direction of the prefabricated truss reinforced concrete lower chord, the beam bottom reinforcement and the stirrups are welded or tied together, a concrete pouring layer is poured outside the beam bottom reinforcement, and part of the stirrups extends above the concrete pouring layer.
[0010] The beam bottom bars are arranged in more than one row, and each row is provided with more than one beam bottom bar. Preferably, the beam bottom bars are arranged in two rows, and each row is provided with eight beam bottom bars.
[0011] More than one row of beam waist reinforcements are arranged in the concrete pouring layer, and each row has more than one beam waist reinforcement. Preferably, one row of beam waist reinforcements is arranged, and each row has two beam waist reinforcements, which are arranged on both sides of the concrete pouring layer respectively, and the beam waist reinforcements are welded or tied together with the stirrups.
[0012] The stirrups adopt a U-shaped structure or a closed structure, and two groups of stirrups are provided. The spacing between adjacent stirrups is 80mm-150mm, preferably 100mm.
[0013] The prefabricated truss steel bar upper chord includes stirrups extending to the outer part of the concrete pouring layer and the beam top full-length bars. The beam top full-length bars are arranged along the length direction of the prefabricated truss steel bar concrete lower chord. The beam top full-length bars are connected to the top of the stirrups by welding or binding technology. Four beam top full-length bars are arranged, which are respectively welded or bound to the steel bars at the stirrup openings.
[0014] The prefabricated truss steel bar upper chord also includes more than one row of beam waist bars, each row of beam waist bars is provided with more than one, preferably, the prefabricated truss steel bar upper chord has two rows of beam waist bars, each row is provided with two, and the beam waist bars are welded or tied together with the stirrups.
[0015] The composite beam prefabricated part is provided with an opening, an opening strengthening upper longitudinal reinforcement is provided above the opening position, and an opening strengthening lower longitudinal reinforcement is provided below the opening position. The opening strengthening upper longitudinal reinforcement and the opening strengthening lower longitudinal reinforcement are arranged along the length direction of the prefabricated truss reinforced concrete lower chord, an opening strengthening upper stirrup is provided above the opening position, and an opening strengthening lower stirrup is provided below the opening position. The opening strengthening upper stirrup and the opening strengthening lower stirrup are respectively connected with the stirrups by welding or binding process, and the spacing between adjacent opening strengthening upper stirrups and opening strengthening lower stirrups is 80mm~150mm, preferably 100mm, and prefabricated truss steel bar vertical webs are respectively provided on the left and right sides of the opening position, and the prefabricated truss steel bar vertical webs are connected with the stirrups by welding or binding process. Four rows of prefabricated truss steel bar vertical webs on each side are provided, and the spacing between adjacent prefabricated truss steel bar vertical webs is 30mm~70mm, preferably 50mm.
[0016] The beneficial effects of the present invention are as follows: the present invention adopts a prefabricated truss reinforced concrete lower chord in combination with a prefabricated truss steel upper chord and a prefabricated truss steel vertical web structure, which can realize prefabrication of a large-span composite beam prefabricated part in a factory. The truss system formed by the prefabricated part has reliable structural rigidity, and can realize reliable transportation and lifting of the large-span composite beam prefabricated part.
[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The figure is a schematic diagram of the composite floor structure using the present invention.
[0019] Figure 2 It is a schematic diagram of the reinforcement cross-section structure of the prefabricated part of the composite beam of the present invention.
[0020] Figure 3 for Figure 2 Schematic diagram of the cross-section structure of the AA part of the composite beam.
[0021] Figure 4 for Figure 2 Schematic diagram of the cross-section structure of the AA partial composite beam prefabricated part.
[0022] Figure 5 for Figure 2 Schematic diagram of the cross-section structure of the BB partial composite beam.
[0023] Figure 6 for Figure 2 Schematic diagram of the cross-section structure of the prefabricated part of the BB partial composite beam.
[0024] Figure 7 for Figure 2 Schematic diagram of the cross-section structure of the CC part of the composite beam.
[0025] Figure 8 for Figure 2 Schematic diagram of the cross-section structure of the prefabricated part of the CC partial composite beam.
[0026] Fig. 9 It is a schematic diagram of the composite beam structure using the present invention.
[0027] Fig.10 The figure is a schematic diagram of the reinforcement structure of the composite beam using the present invention.
[0028] In the figure, 1-frame column, 2-hidden beam between columns, 3-precast part of composite beam, 4-additional reinforcement for joints, 5-longitudinal reinforcement for composite cast-in-place layer, 6-beam bottom reinforcement, 7-through-length reinforcement for beam top, 8-additional reinforcement for beam top support, 9-welded longitudinal reinforcement at support, 10-upper stirrups for strengthening opening, 11-lower stirrups for strengthening opening, 12-vertical web members of precast truss steel bars, 13-upper longitudinal reinforcement for strengthening opening, 14-lower longitudinal reinforcement for strengthening opening, 15-lower chord of precast truss steel bars, 16-upper chord of precast truss steel bars, 17-cast-in-place part of composite beam, 18-precast layer of floor slab, 19-cast-in-place layer of floor slab, 20-stirrups, 21-beam waist reinforcement, 22-rear closed stirrup hooks, 23-through-fastening bolts, 24-connecting support. DETAILED DESCRIPTION
[0029] This embodiment is a preferred implementation mode of the present invention. Other embodiments whose principles and basic structures are the same or similar to those of this embodiment are within the protection scope of the present invention.
[0030] Please refer to the attached Figure 2 To Attachment Fig.10The present invention mainly protects a large-span composite beam prefabricated component that can be reliably transported and hoisted, which mainly includes a prefabricated truss reinforced concrete lower chord 15, a prefabricated truss reinforced concrete upper chord 16 and a prefabricated truss reinforced concrete vertical web 12. The prefabricated truss reinforced concrete upper chord 16 is fixedly arranged above the prefabricated truss reinforced concrete lower chord 15, and the prefabricated truss reinforced concrete vertical web 12 is fixedly arranged in the prefabricated truss reinforced concrete lower chord 15. The prefabricated truss reinforced concrete lower chord 15, the prefabricated truss reinforced concrete upper chord 16 and the prefabricated truss reinforced concrete vertical web 12 are prefabricated in the factory to form a large-span composite beam prefabricated part. The structural strength of the entire composite beam prefabricated component can be strengthened by the prefabricated truss reinforced concrete upper chord 16 to ensure that it will not break or be damaged during hoisting and transportation. The truss system formed by the prefabricated part has reliable structural rigidity, and can realize reliable transportation and hoisting of the large-span composite beam prefabricated part.
[0031] In this embodiment, the prefabricated truss reinforced concrete lower chord 15 includes a beam bottom reinforcement 6, stirrups 20 and a concrete casting layer. The beam bottom reinforcement 6 is arranged along the length direction of the prefabricated truss reinforced concrete lower chord 15 (it can also be called that the beam bottom reinforcement 6 is parallel to the length direction of the prefabricated truss reinforced concrete lower chord 15), the stirrups 20 are perpendicular to the length direction of the prefabricated truss reinforced concrete lower chord 15, the beam bottom reinforcement 6 and the stirrups 20 are welded or tied together, and a concrete casting layer is cast on the outside of the beam bottom reinforcement 6 to form the main body of the prefabricated truss reinforced concrete lower chord 15, and part of the stirrups 20 extends above the concrete casting layer.
[0032] In this embodiment, more than one row of beam bottom bars 6 are provided, and each row of beam bottom bars 6 is provided with more than one beam bottom bar. The specific number can be set according to actual needs. In this embodiment, two rows of beam bottom bars 6 are provided, and each row is provided with eight beam bottom bars.
[0033] In this embodiment, more than one row of beam waist reinforcements 21 are provided in the concrete pouring layer, and each row of beam waist reinforcements 21 is provided with more than one. In this embodiment, one row of beam waist reinforcements 21 is provided, and each row is provided with two, which are respectively provided on both sides of the concrete pouring layer. Preferably, the beam waist reinforcement 21 is welded or tied together with the stirrups 20. During specific implementation, the specific number of the beam waist reinforcements 21 can be set according to actual needs.
[0034] In this embodiment, the stirrup 20 adopts a U-shaped structure, which can be defined as an open stirrup, and the open part extends to the outside of the concrete casting layer. In specific implementation, a closed structure can also be adopted. In this embodiment, the stirrup 20 is provided with two groups, that is, two groups of open stirrups of U-shaped structure, that is, there are four steel bars extending to the outside of the concrete casting layer. In this embodiment, the spacing between adjacent stirrups 20 is 80mm~150mm, preferably 100mm.
[0035] In this embodiment, the upper chord bar 16 of the prefabricated truss steel bar includes stirrups 20 extending to the outer part of the concrete pouring layer and the top beam through-length bars 7. The top beam through-length bars 7 are arranged along the length direction of the lower chord bar 15 of the prefabricated truss steel bar concrete (it can also be called that the top beam through-length bars 7 are parallel to the length direction of the lower chord bar 15 of the prefabricated truss steel bar concrete). The top beam through-length bars 7 are connected to the top of the stirrups 20 by welding or binding. In this embodiment, four top beam through-length bars 7 are arranged, which are respectively welded or bound to the steel bars at the opening of the stirrups 20. In specific implementation, the number of top beam through-length bars 7 can also be specifically set according to actual needs. When the stirrups 20 are open stirrups, the top opening of the stirrups 20 is also fixed with a rear closed stirrup hook 22 by welding or binding to seal the opening of the stirrups 20.
[0036] In the present embodiment, the prefabricated truss steel bar upper chord 16 also includes more than one row of beam waist reinforcements 21, and each row of beam waist reinforcements 21 is provided with more than one. In the present embodiment, the beam waist reinforcements 21 in the prefabricated truss steel bar upper chord 16 are provided with two rows, and each row is provided with two. Preferably, the beam waist reinforcements 21 are welded or tied together with the stirrups 20. During the specific implementation, the specific number of the beam waist reinforcements 21 can be set according to actual needs.
[0037] In this embodiment, three rows of beam waist reinforcements 21 are arranged in total, wherein one row is arranged in the concrete pouring layer, and the other two rows are arranged above the concrete pouring layer. During specific implementation, the specific settings can be made according to actual needs.
[0038] The composite beam of the large-span composite beam prefabricated member that can be reliably transported and hoisted by using the present invention may be provided with holes for use as vents or for passing ventilation ducts, water, electricity, equipment pipelines, etc. It is necessary to reserve the hole position on the large-span composite beam prefabricated member that can be reliably transported and hoisted. In this embodiment, the hole position is provided with a hole strengthening upper longitudinal rib 13, and the hole position is provided with a hole strengthening lower longitudinal rib 14. The hole strengthening upper longitudinal rib 13 and the hole strengthening lower longitudinal rib 14 are arranged along the prefabricated truss reinforced concrete lower chord 15. The length direction is set (it can also be called that the upper longitudinal reinforcement bars 13 and the lower longitudinal reinforcement bars 14 of the opening are parallel to the length direction of the lower chord 15 of the prefabricated truss reinforced concrete). In this embodiment, four upper longitudinal reinforcement bars 13 and four lower longitudinal reinforcement bars 14 of the opening are respectively set, and the four upper longitudinal reinforcement bars 13 and the four lower longitudinal reinforcement bars 14 of the opening are respectively connected with the stirrups 20 by welding or binding process. In specific implementation, the number of the upper longitudinal reinforcement bars 13 and the lower longitudinal reinforcement bars 14 of the opening can also be specifically set according to actual needs. In this embodiment, the upper stirrups 10 of the opening are set above the opening position, and the lower stirrups 11 of the opening are set below the opening position. The upper stirrups 10 and the lower stirrups 11 of the opening are respectively connected with the stirrups 20 by welding or binding process. The spacing between the adjacent upper stirrups 10 and the lower stirrups 11 of the opening is 80mm~150mm, preferably 100mm. In this embodiment, prefabricated truss steel bar vertical web members 12 are respectively arranged on the left and right sides of the opening position. The prefabricated truss steel bar vertical web members 12 are connected to the stirrups 20 by welding or binding technology. Four rows of prefabricated truss steel bar vertical web members 12 are arranged on each side. The spacing between adjacent prefabricated truss steel bar vertical web members 12 is 30mm~70mm, preferably 50mm, which can strengthen the force-bearing structure at the opening position. During specific implementation, the number and spacing of the prefabricated truss steel bar vertical web members 12 can also be set according to actual needs.
[0039] The present invention also protects a composite beam using the above-mentioned large-span composite beam prefabricated parts that can be reliably transported and hoisted. The composite beam includes a composite beam prefabricated part 3 and a composite beam cast-in-place part 17 formed on the composite beam prefabricated part 3 by a cast-in-place process. The composite beam prefabricated part 3 and the composite beam cast-in-place part 17 together constitute the composite beam.
[0040] In this embodiment, a support structure for supporting the floor slab is fixedly provided on one or both sides of the composite beam. In this embodiment, the support structure adopts a connecting support 24, and the connecting support 24 is fixedly installed with the composite beam through a through-fastening bolt 23. The through-fastening bolt 23 can adopt a pre-embedded structure, or a through hole for passing through the through-fastening bolt 23 can be reserved when casting the prefabricated part 3 of the composite beam and the cast-in-place part 17 of the composite beam, or a through hole for passing through the through-fastening bolt 23 can be opened on site according to actual needs. In specific implementation, the support structure can also be implemented by a cantilever structure or other structures with a supporting function in the prior art.
[0041] The present invention also protects a building structure using the above-mentioned composite beams, which mainly includes a longitudinal support structure, composite beams and floor slabs, wherein the composite beams are overlapped on the longitudinal support structure, and the floor slabs are overlapped on the composite beams.
[0042] In this embodiment, the longitudinal support structure may be a frame column 1 or a wall (mainly a load-bearing wall). Adjacent frame columns 1 may also be provided with inter-column concealed beams 2.
[0043] In this embodiment, the floor slab includes a prefabricated floor slab layer 18 and a cast-in-place floor slab layer 19. The prefabricated floor slab layer 18 is overlapped on the composite beam or the supporting structure of the composite beam. The prefabricated floor slab layer 18 is provided with composite cast-in-place layer longitudinal reinforcement 5. The joints between adjacent prefabricated floor slab layers 18 are provided with joint additional reinforcement 4. The cast-in-place floor slab layer 19 is formed on the prefabricated floor slab layer 18 by a cast-in-place process. The prefabricated floor slab layer 18 and the cast-in-place floor slab layer 19 together constitute the floor slab.
[0044] The present invention adopts a prefabricated truss reinforced concrete lower chord, a prefabricated truss steel upper chord and a prefabricated truss steel vertical web structure, which can realize the prefabrication of the large-span composite beam prefabricated part in the factory. The truss system formed by the prefabricated part has reliable structural rigidity, and can realize the reliable transportation and lifting of the large-span composite beam prefabricated part.
Claims
1. A large-span composite beam prefabricated part that can be reliably transported and hoisted, characterized by: The composite beam prefabricated component comprises a prefabricated truss reinforced concrete lower chord (15), a prefabricated truss reinforced concrete upper chord (16) and a prefabricated truss reinforced concrete vertical web member (12); the prefabricated truss reinforced concrete upper chord (16) is fixedly arranged above the prefabricated truss reinforced concrete lower chord (15), and the prefabricated truss reinforced concrete vertical web member (12) is fixedly arranged inside the prefabricated truss reinforced concrete lower chord (15).
2. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 1 is characterized in that: The prefabricated truss reinforced concrete lower chord (15) comprises a beam bottom bar (6), stirrups (20) and a concrete pouring layer, wherein the beam bottom bar (6) is arranged along the length direction of the prefabricated truss reinforced concrete lower chord (15), the stirrups (20) are perpendicular to the length direction of the prefabricated truss reinforced concrete lower chord (15), the beam bottom bar (6) and the stirrups (20) are welded or tied together, a concrete pouring layer is poured outside the beam bottom bar (6), and a portion of the stirrups (20) extends above the concrete pouring layer.
3. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 2 is characterized in that: The beam bottom reinforcement (6) is provided in more than one row, and each row of the beam bottom reinforcement (6) is provided with more than one beam bottom reinforcement (6). Preferably, the beam bottom reinforcement (6) is provided in two rows, and each row is provided with eight beam bottom reinforcements.
4. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 2 is characterized in that: More than one row of beam waist reinforcements (21) are arranged in the concrete pouring layer, and each row of beam waist reinforcements (21) is provided with more than one beam waist reinforcement (21). Preferably, one row of beam waist reinforcements (21) is provided, and each row is provided with two beam waist reinforcements, which are respectively arranged on both sides of the concrete pouring layer, and the beam waist reinforcements (21) are welded or tied together with the stirrups (20).
5. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 2 is characterized in that: The stirrups (20) adopt a U-shaped structure or a closed structure. Two groups of stirrups (20) are provided, and the spacing between adjacent stirrups (20) is 80 mm to 150 mm, preferably 100 mm.
6. The large-span composite beam prefabricated part capable of reliable transportation and hoisting according to claim 1 is characterized in that: The prefabricated truss steel bar upper chord (16) comprises a stirrup (20) extending to the outer side of the concrete pouring layer and a beam top through-length bar (7), the beam top through-length bar (7) being arranged along the length direction of the prefabricated truss steel bar concrete lower chord (15), the beam top through-length bar (7) being connected to the top of the stirrup (20) by welding or binding, and four beam top through-length bars (7) being arranged and respectively welded or bound to the steel bars at the opening of the stirrup (20).
7. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 1 is characterized in that: The prefabricated truss steel bar upper chord (16) further comprises one or more rows of beam waist bars (21), each row of which comprises one or more beam waist bars (21). Preferably, the prefabricated truss steel bar upper chord (16) comprises two rows of beam waist bars (21), each row comprising two beam waist bars, and the beam waist bars (21) are welded or tied together with the stirrups (20).
8. The large-span composite beam prefabricated member capable of reliable transportation and hoisting according to claim 1 is characterized in that: The composite beam prefabricated part is provided with an opening, an opening reinforcement upper longitudinal bar (13) is provided above the opening, and an opening reinforcement lower longitudinal bar (14) is provided below the opening. The opening reinforcement upper longitudinal bar (13) and the opening reinforcement lower longitudinal bar (14) are provided along the length direction of the prefabricated truss reinforced concrete lower chord (15), an opening reinforcement upper stirrup (10) is provided above the opening, and an opening reinforcement lower stirrup (11) is provided below the opening. The opening reinforcement upper stirrup (10) and the opening reinforcement lower stirrup (11) are respectively connected to the stirrup by welding or binding process. The reinforcement bars (20) are connected together, the spacing between adjacent opening reinforcement upper stirrups (10) and opening reinforcement lower stirrups (11) is 80 mm to 150 mm, preferably (100) mm, prefabricated truss steel bar vertical web members (12) are respectively arranged on the left and right sides of the opening position, the prefabricated truss steel bar vertical web members (12) are connected to the stirrups (20) by welding or binding technology, four rows of prefabricated truss steel bar vertical web members (12) are arranged on each side, and the spacing between adjacent prefabricated truss steel bar vertical web members (12) is 30 mm to 70 mm, preferably 50 mm.
9. A composite beam using the large-span composite beam prefabricated member that can be reliably transported and hoisted as claimed in any one of claims 1 to 8, characterized in that: The composite beam comprises a composite beam prefabricated part (3) and a composite beam cast-in-place part (17) formed on the composite beam prefabricated part (3) by a cast-in-place process. The composite beam prefabricated part (3) and the composite beam cast-in-place part (17) together constitute the composite beam. A support structure for supporting a floor slab is fixedly arranged on one side or both sides of the composite beam. The support structure adopts a connecting support (24) or a cantilever. The connecting support (24) is fixedly installed with the composite beam by means of through-through fastening bolts (23).
10. A building structure using the composite beam according to claim 9, characterized in that: The building structure comprises a longitudinal support structure, a composite beam and a floor slab, wherein the composite beam is overlapped on the longitudinal support structure, and the floor slab is overlapped on the composite beam. The longitudinal support structure adopts a frame column (1) or a wall, and adjacent frame columns (1) may also be provided with an inter-column concealed beam (2). The floor slab comprises a prefabricated floor slab layer (18) and a cast-in-place floor slab layer (19). The prefabricated floor slab layer (18) is overlapped on the composite beam or the composite beam support structure, and longitudinal reinforcement (5) of the composite cast-in-place layer is provided on the prefabricated floor slab layer (18). Additional reinforcement (4) of the joints between adjacent prefabricated floor slab layers (18) is provided. A cast-in-place floor slab layer (19) is formed on the prefabricated floor slab layer (18) by a cast-in-place process, and the prefabricated floor slab layer (18) and the cast-in-place floor slab layer (19) together constitute the floor slab.