Steel column and prefabricated prestressed composite beam light fabricated frame and construction process thereof

Abstract

The invention belongs to the field of constructional engineering, and particularly relates to a steel column and prefabricated prestressed composite beam light fabricated frame and a construction process thereof. The frame comprises one or combination of a steel pipe column and prestress combination beam frame structure and an I-shaped steel column and prestress combination beam frame structure, and the steel pipe column and prestress combination beam frame structure is one or combination of an embedded bolt-angle steel connection mode and an outer reinforcing ring-steel plate connection mode. The I-shaped steel column and prestress combination beam frame structure is one or combination of an angle steel-bolt connection mode and an end plate-unilateral bolt connection mode. According to the steel and concrete combined beam, the steel beam and the concrete plate are connected into a whole through the shear connectors, concrete in the combined section is pressed, the steel beam is mainly pulled, the material characteristics of steel and concrete can be fully exerted, the problem that the pressed side of a single steel beam is bent and unstable is solved, and the steel and concrete combined beam has the advantages of being high in bearing capacity, good in ductility and overall stability, small in section height and the like.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and specifically relates to a light assembled frame of steel columns and prefabricated prestressed composite beams and a construction process thereof. Background Art

[0002] Steel columns have the characteristics of light weight, high strength, high toughness, good plasticity, good seismic performance, etc., and the cross-sectional design is flexible and the construction and installation are convenient. They play an important role in the construction fields such as high-rise buildings, industrial plants, stadiums, and light houses. Steel frame structures are mainly used in high-rise buildings and industrial plants with large loads. The use of assembly construction methods between steel components can greatly save construction time. However, when the compression flange of the steel beam in the steel frame reaches a certain stress level, the compression flange of the beam is prone to buckling instability under the lateral interference force. This phenomenon limits the length of the steel beam to not be too large and the cross-sectional size to not be too small, which restricts the span of the steel frame structure to a certain extent. Summary of the invention

[0003] In order to make up for the shortcomings of the existing steel frame structure system, the purpose of the present invention is to provide a light assembled frame of steel columns and prefabricated prestressed composite beams and its construction process, so as to solve the problems in the prior art that the compressed flange of a single steel beam is prone to buckling and instability, and the span of the steel frame structure is restricted to a certain extent.

[0004] The technical solution of the present invention is:

[0005] A light assembled frame of steel columns and prefabricated prestressed composite beams comprises a steel tube column and prestressed composite beam frame structure, one or a combination of an I-beam column and prestressed composite beam frame structure, the steel tube column and prestressed composite beam frame structure is one or a combination of a pre-buried bolt-angle steel connection form, an external reinforcement ring-steel plate connection form, and the I-beam column and prestressed composite beam frame structure is one or a combination of an angle steel-bolt connection form, an end plate-single-side bolt connection form, or a combination.

[0006] The structure of the steel column and prefabricated prestressed composite beam light assembly frame, with embedded bolt-angle steel connection is as follows:

[0007] At the connection between the steel pipe column and the steel beam, the steel pipe column and the web of the steel beam are connected by a side angle steel, and the steel pipe column is provided with an embedded bolt connected to the side angle steel, the embedded bolt is passed through the reserved hole on one side of the side angle steel and is fixed by a nut, and the high-strength bolt is passed through the reserved hole on the other side of the side angle steel, the reserved hole at the end of the web of the steel beam and is fixed by a nut; At the connection between the steel pipe column and the steel beam, the steel pipe column and the lower flange of the steel beam are connected by a bottom angle steel, and the steel pipe column is provided with an embedded bolt connected to the bottom angle steel, the embedded bolt is passed through the reserved hole on one side of the bottom angle steel and is fixed by a nut; a pad is arranged between the bottom angle steel and the bottom of the lower flange of the steel beam, and the high-strength bolt is passed through the reserved hole on the other side of the bottom angle steel, the reserved hole of the pad, the reserved hole at the end of the lower flange of the steel beam and is fixed by a nut;

[0008] A shear connector is provided at the top of the upper flange of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are provided in parallel between the upper flange and the lower flange at both ends of the steel beam and on both sides of the web, and steering blocks are provided on the stiffening plates. Each set of stiffening plates and steering blocks are provided with reserved holes for passing prestressed steel cables, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks; prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form an integral prestressed composite beam.

[0009] The structure of the steel column and prefabricated prestressed composite beam light assembly frame, the external reinforcement ring-steel plate connection form is as follows:

[0010] At the connection between the steel pipe column and the steel beam, the outer ring plate of the steel pipe column and the end of the steel beam are connected by relatively arranged connecting steel plates, connecting steel plates are respectively arranged on both sides of the outer ring plate and reserved holes are arranged on the connecting steel plates, and connecting steel plates are arranged on the ends of the steel beam and reserved holes are arranged on the connecting steel plates, and high-strength bolts are passed through the reserved holes of the relatively arranged connecting steel plates and fixed by nuts;

[0011] A shear connector is provided at the top of the upper flange of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at both ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Each group of stiffening plates and steering blocks are relatively provided with reserved holes for passing prestressed steel cables, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form an integral prestressed composite beam.

[0012] The structure of the steel column and prefabricated prestressed composite beam light assembled frame, angle steel-bolt connection form is as follows:

[0013] At the connection between the I-beam column and the steel beam, reserved holes corresponding to the side angle steels are arranged on both sides of the I-beam column corresponding to the steel beam, and a reserved hole is arranged at the end of the web of the steel beam. High-strength bolts are passed through the reserved holes on one side of the side angle steel, the reserved holes on the side of the I-beam column, and are connected and fixed by nuts. High-strength bolts are passed through the reserved holes on the other side of the side angle steel, the reserved holes on the end of the web of the steel beam, and are connected and fixed by nuts. At the connection between the I-beam column and the steel beam, reserved holes corresponding to the bottom angle steels are arranged on both sides of the I-beam column corresponding to the steel beam, and a reserved hole is arranged at the end of the lower flange of the steel beam. High-strength bolts are passed through the reserved holes on one side of the bottom angle steel, the reserved holes on the side of the I-beam column, and are connected and fixed by nuts. High-strength bolts are passed through the reserved holes on the other side of the bottom angle steel, the reserved holes on the end of the lower flange of the steel beam, and are connected and fixed by nuts.

[0014] Two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at the two ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Reservation holes for passing prestressed steel cables are opened relatively in each group of stiffening plates and steering blocks, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form a prestressed steel beam; a shear connector is arranged on the top of the upper flange of the steel beam, and a precast concrete slab is placed on the prestressed steel beam with the shear connector. The upper end of the shear connector passes through the reserved holes of the precast concrete slab and is fixed by a nut, and high-strength mortar is poured in the reserved holes of the precast concrete slab to form a separated prestressed composite beam.

[0015] The structure of the steel column and prefabricated prestressed composite beam light assembly frame, end plate-single-side bolt connection form is as follows:

[0016] At the connection between the I-beam column and the steel beam, the I-beam column and the end of the steel beam are connected by oppositely arranged end plates, the end of the steel beam is provided with an end plate and a reserved hole is provided on the end plate, and the two sides of the I-beam column corresponding to the steel beam are provided with reserved holes corresponding to the end plate, and high-strength bolts are inserted through the reserved holes of the end plate and the reserved holes on the side of the I-beam column and fixed by nuts;

[0017] Two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at the two ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Reservation holes for passing prestressed steel cables are opened relatively in each group of stiffening plates and steering blocks, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form a prestressed steel beam; a shear connector is arranged on the top of the upper flange of the steel beam, and a precast concrete slab is placed on the prestressed steel beam with the shear connector. The upper end of the shear connector passes through the reserved holes of the precast concrete slab and is fixed by a nut, and high-strength mortar is poured in the reserved holes of the precast concrete slab to form a separated prestressed composite beam.

[0018] The construction process of the steel column and prefabricated prestressed composite beam light assembly frame, in the steel pipe column and prestressed composite beam frame structure, the embedded bolt-angle steel connection form includes the following steps:

[0019] (1) Component production

[0020] 1) Make steel pipe columns with embedded bolts;

[0021] 2) Production of integral prestressed composite beam 3

[0022] Two rows of shear connectors are welded on the top of the upper flange of the steel beam, reserved holes for inserting high-strength bolts are set on the lower flange and the end of the web of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates; prestressed steel cables are inserted between the upper flange and the lower flange of the steel beam and on both sides of the web through the reserved holes of the stiffening plates and the steering blocks, and the prestressed steel cables are tensioned to form an integral prestressed composite beam;

[0023] (2) Component Installation

[0024] The integral prestressed composite beam is docked to the connection position of the steel pipe column, the side angle steel is attached to the web of the steel beam and the connection of the steel pipe column, the embedded bolts are inserted into the reserved holes of the side angle steel, the high-strength bolts are inserted into the reserved holes of the side angle steel and the web end of the steel beam, the embedded bolts and the high-strength bolts are fixed with nuts respectively, and the web of the steel beam is connected to the steel pipe column; the bottom angle steel is attached to the bottom of the lower flange of the steel beam and the connection of the steel pipe column, the embedded bolts are inserted into the reserved holes of the bottom angle steel, a pad is arranged between the bottom angle steel and the bottom of the lower flange of the steel beam, the high-strength bolts are inserted into the reserved holes of the lower flange of the steel beam, the bottom angle steel and the pad, the embedded bolts and the high-strength bolts are fixed with nuts respectively, and the lower flange of the steel beam is connected to the steel pipe column to form a frame node between the steel pipe column and the prefabricated integral prestressed composite beam.

[0025] The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams, in the steel pipe column and prestressed composite beam frame structure, the external reinforcement ring-steel plate connection form includes the following steps:

[0026] (1) Component production

[0027] 1) Make a steel pipe column with an outer ring plate, weld the connecting steel plate at the connection position of the outer ring plate and set a reserved hole;

[0028] 2) Fabrication of integral prestressed composite beams

[0029] Two rows of shear connectors are welded on the top of the upper flange of the steel beam, connecting steel plates are welded on the ends of the steel beam and reserved holes are set on the connecting steel plates, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are parallelly set between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are set on the stiffening plates. Prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web, and the prestressed steel cables are tensioned to form an integral prestressed composite beam;

[0030] (2) Component Installation

[0031] Connect the integral prestressed composite beam to the connection of the outer ring plate, pass the high-strength bolts through the reserved holes of the connecting steel plate at the end of the steel beam and the connecting steel plate on the outer ring plate, fix them with nuts, and then pour high-strength mortar into the gap on the upper part of the outer ring plate to form a node between the steel pipe column and the prefabricated integral prestressed composite beam frame.

[0032] The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams, in which the angle steel-bolt connection form in the frame structure of I-beam columns and prestressed composite beams comprises the following steps:

[0033] (1) Component production

[0034] 1) Make I-beam columns and set reserved holes at the connection positions;

[0035] 2) Prestressed steel beam production

[0036] Two rows of shear connectors are welded on the top of the upper flange of the steel beam, reserved holes for inserting high-strength bolts are set on the lower flange and the end of the web of the steel beam, two or more stiffening plates with holes are set in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are set on the stiffening plates. Prestressed steel cables are inserted between the upper flange and the lower flange of the steel beam and on both sides of the web through the reserved holes of the stiffening plates and the steering blocks, and the prestressed steel cables are tensioned to form a prestressed steel beam;

[0037] 3) Make a precast concrete slab with reserved holes, and the spacing between the reserved holes is set according to the spacing of the shear connectors;

[0038] (2) Component Installation

[0039] 1) Composite beam installation: The precast concrete slab is placed on the prestressed steel beam with a shear connector welded thereto. The upper end of the shear connector passes through the reserved hole of the precast concrete slab and is fixed by a nut. High-strength mortar is then poured into the reserved hole of the precast concrete slab to form a separated prestressed composite beam.

[0040] 2) Node installation: connect the separated prestressed composite beam to the connection position of the I-beam column, attach the side angle steel to the web of the steel beam and the connection between the I-beam column, insert the high-strength bolts into the reserved holes between the web end of the steel beam and the side angle steel, and the reserved holes between the I-beam column and the side angle steel, and fix the high-strength bolts with nuts to connect the web of the steel beam to the I-beam column; attach the bottom angle steel to the bottom of the lower flange of the steel beam and the connection between the I-beam column, and insert the high-strength bolts through the reserved holes between the I-beam column and the bottom angle steel, and the reserved holes between the bottom angle steel and the lower flange of the steel beam, and fix the high-strength bolts with nuts to connect the lower flange of the steel beam to the I-beam column; thereby, a frame node between the I-beam column and the prefabricated separated prestressed composite beam is formed.

[0041] The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams, in which the end plate-single-side bolt connection form is used in the frame structure of I-beam steel columns and prestressed composite beams, comprises the following steps:

[0042] (1) Component production

[0043] 1) Make I-beam columns and set reserved holes at the connection positions;

[0044] 2) Prestressed steel beam production

[0045] Two rows of shear connectors are welded on the top of the upper flange of the steel beam, an end plate with a reserved hole is welded on the end of the steel beam, and two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and a steering block is arranged on the stiffening plate. Prestressed steel cables are passed through the reserved holes of the stiffening plate and the steering block between the upper flange and the lower flange of the steel beam and on both sides of the web, and the prestressed steel cables are tensioned to form a prestressed steel beam with a connected end plate;

[0046] 3) Make a precast concrete slab with reserved holes, and the spacing between the reserved holes is set according to the spacing of the shear connectors;

[0047] (2) Component Installation

[0048] 1) Composite beam installation: The precast concrete slab is placed on the prestressed steel beam with a shear connector welded thereto. The upper end of the shear connector passes through the reserved hole of the precast concrete slab and is fixed by a nut. Then, high-strength mortar is poured in the reserved hole of the precast concrete slab to form a separated prestressed composite beam.

[0049] 2) Node installation: connect the separated prestressed composite beam to the connection position of the I-beam column, insert the high-strength bolts into the reserved holes of the end plate and the I-beam column, fix the high-strength bolts with nuts, connect the steel beam to the I-beam column through the end plate, and form a node between the I-beam column and the prefabricated separated prestressed composite beam frame.

[0050] The advantages and beneficial effects of the present invention are:

[0051] 1. The present invention proposes a light-weight assembled frame structure of steel columns and prefabricated prestressed steel-concrete composite beams, and designs the node structure of the integral prestressed composite beam and the steel pipe column frame (embedded bolt-angle steel connection, external reinforcement ring-steel plate connection), the node structure of the separated prestressed composite beam and the I-beam column frame (angle steel-bolt connection, end plate-single-side bolt connection), and provides the corresponding construction process. Among them, the steel-concrete composite beam is connected to the steel beam and the concrete slab as a whole through a shear connector. The concrete in the composite section is compressed and the steel beam is mainly tensile. It can give full play to the material properties of steel and concrete, overcome the problem of buckling instability on the compression side of a single steel beam, and has the characteristics of high bearing capacity, good ductility, good overall stability, and small section height. Further, prestress is applied on the tensile side of the steel beam of the steel-concrete composite beam to form a prestressed steel-concrete composite beam, which can expand the elastic working range of the structure, improve the rigidity, and greatly enhance the spanning capacity of the component.

[0052] 2. The light assembled frame of steel columns and prefabricated prestressed composite beams provided by the present invention has prefabricated components and can be designed in a standardized manner, produced in factories, and constructed in an assembled manner. It has the advantages of fast construction speed, controllable component quality, and less pollution during on-site construction. In addition, the structure has high bearing capacity, high rigidity, and good seismic performance. Compared with traditional concrete frame structures, the overall self-weight of the structure is greatly reduced, which can reduce the foundation cost and alleviate the effects of earthquakes. It is suitable for heavy-load structures or large-span building structures such as high-rise (super-high-rise) buildings, large and medium-sized industrial plants, and has good social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1-Figure 3 This is a structural diagram of a lightweight assembled frame with steel columns and prefabricated prestressed composite beams. Figure 1 For the main view, Figure 2 for Figure 1 AA profile in Figure 3 for Figure 1 BB cross-section diagram in.

[0054] Figure 4 This is the node structure of the steel pipe column and the prestressed composite beam frame (embedded bolt-angle steel connection). Among them, (a) is the main view, (b) is the AA section view in (a), and (c) is the BB section view in (a).

[0055] Figure 5 The node structure of the steel pipe column and the prestressed composite beam frame (external reinforcement ring-steel plate connection). Among them, (a) is the main view, (b) is the AA section view in (a), and (c) is the BB section view in (a).

[0056] Figure 6 This is the node structure of the I-beam column and the prestressed composite beam frame (angle steel-bolt connection). Among them, (a) is the main view, (b) is the AA section view in (a), and (c) is the BB section view in (a).

[0057] Figure 7 This is the node structure of the I-beam column and the prestressed composite beam frame (end plate-single-side bolt connection), where (a) is the main view, (b) is the AA section view in (a), and (c) is the BB section view in (a).

[0058] Explanation of drawing numbers: 1 steel pipe column; 2 I-beam column; 3 integral prestressed composite beam; 4 separated prestressed composite beam; 5 steel beam (51 upper flange, 52 web, 53 lower flange); 6 concrete; 7 prestressed steel cable; 8 embedded bolts; 9 shear connector; 10 stiffening plate; 11 steering block; 12 side angle steel; 13 bottom angle steel; 14 high-strength bolts; 15 pad; 16 outer ring plate; 17 connecting steel plate; 18 high-strength mortar; 19 end plate; 20 precast concrete slab. DETAILED DESCRIPTION

[0059] like Figure 1-Figure 7 As shown, the steel column and prefabricated prestressed composite beam light assembly frame of the present invention mainly includes one or a combination of a steel pipe column and prestressed composite beam frame structure, an I-beam column and prestressed composite beam frame structure, the steel pipe column and prestressed composite beam frame structure is one or a combination of a pre-buried bolt-angle steel connection form, an external reinforcement ring-steel plate connection form, and the I-beam column and prestressed composite beam frame structure is one or a combination of an angle steel-bolt connection form, an end plate-single-side bolt connection form, or a combination.

[0060] like Figure 4 As shown, the structure of the embedded bolt-angle steel connection is as follows:

[0061] At the connection between the steel pipe column 1 and the steel beam 5, the steel pipe column 1 and the web 52 of the steel beam 5 are connected by a side angle steel 12, and the steel pipe column 1 is provided with an embedded bolt 8 connected to the side angle steel 12, the embedded bolt 8 is passed through the reserved hole on one side of the side angle steel 12 and fixed by a nut, and the high-strength bolt 14 is passed through the reserved hole on the other side of the side angle steel 12 and the reserved hole at the end of the web 52 of the steel beam 5 and fixed by a nut; At the connection between the steel pipe column 1 and the steel beam 5, the steel pipe column 1 and the steel The lower flanges 53 of the beam 5 are connected by a bottom angle steel 13, and the steel pipe column 1 is provided with an embedded bolt 8 connected to the bottom angle steel 13. The embedded bolt 8 is passed through the reserved hole on one side of the bottom angle steel 13 and is fixed by a nut; a pad 15 is arranged between the bottom angle steel 13 and the bottom of the lower flange 53 of the steel beam 5, and a high-strength bolt 14 is passed through the reserved hole on the other side of the bottom angle steel 13, the reserved hole of the pad 15, and the reserved hole at the end of the lower flange 53 of the steel beam 5 and is fixed by a nut.

[0062] A shear connector 9 is provided on the top of the upper flange 51 of the steel beam 5, and concrete 6 is poured on the top of the steel beam 5 to form an integral steel and concrete composite beam; more than two perforated stiffening plates 10 are arranged in parallel between the upper flange 51 and the lower flange 53 at the two ends of the steel beam 5 and on both sides of the web 52, and a steering block 11 is arranged on the stiffening plate 10. Each group of stiffening plates 10 and steering blocks 11 is relatively provided with reserved holes for passing prestressed steel cables 7, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables 7 are arranged on the steel beam 5 in the form of arc curves at both ends and a straight line in the middle through the stiffening plates 10 and the steering blocks 11; the prestressed steel cables 7 are passed through the reserved holes of the stiffening plates 10 and the steering blocks 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52 to form an integral prestressed composite beam 3.

[0063] like Figure 5 As shown, the structure of the outer reinforcement ring-steel plate connection is as follows:

[0064] At the connection between the steel pipe column 1 and the steel beam 5, the outer ring plate 16 of the steel pipe column 1 is connected to the end of the steel beam 5 through a connecting steel plate 17 arranged oppositely. Connecting steel plates 17 are respectively arranged on both sides of the outer ring plate 16 and reserved holes are arranged on the connecting steel plates 17. Connecting steel plates 17 are arranged at the end of the steel beam 5 and reserved holes are arranged on the connecting steel plates 17. High-strength bolts 14 are passed through the reserved holes of the connecting steel plates 17 arranged oppositely and are fixed by nuts.

[0065] A shear connector 9 is provided on the top of the upper flange 51 of the steel beam 5, and concrete 6 is poured on the top of the steel beam 5 to form an integral steel and concrete composite beam; more than two perforated stiffening plates 10 are arranged in parallel between the upper flange 51 and the lower flange 53 at the two ends of the steel beam 5 and on both sides of the web 52, and a steering block 11 is arranged on the stiffening plate 10. Each group of stiffening plates 10 and steering blocks 11 is relatively provided with reserved holes for passing prestressed steel cables 7, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables 7 are arranged on the steel beam 5 in the form of arc curves at both ends and a straight line in the middle through the stiffening plates 10 and the steering blocks 11. The prestressed steel cables 7 are passed through the reserved holes of the stiffening plates 10 and the steering blocks 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52 to form an integral prestressed composite beam 3.

[0066] like Figure 6 As shown, the structure of the angle steel-bolt connection is as follows:

[0067] At the connection between the I-beam column 2 and the steel beam 5, reserved holes corresponding to the side angle steel 12 are set on both sides corresponding to the I-beam column 2 and the steel beam 5, and a reserved hole is set at the end of the web 52 of the steel beam 5. The high-strength bolts 14 are passed through the reserved holes on one side of the side angle steel 12 and the reserved holes on the side of the I-beam column 2 and are connected and fixed by nuts. The high-strength bolts 14 are passed through the reserved holes on the other side of the side angle steel 12 and the reserved holes at the end of the web 52 of the steel beam 5 and are connected and fixed by nuts; at the connection between the I-beam column 2 and the steel beam 5, reserved holes corresponding to the bottom angle steel 13 are set on both sides corresponding to the I-beam column 2 and the steel beam 5, and a reserved hole is set at the end of the lower flange 53 of the steel beam 5. The high-strength bolts 14 are passed through the reserved holes on one side of the bottom angle steel 13 and the reserved holes on the side of the I-beam column 2 and are connected and fixed by nuts. The high-strength bolts 14 are passed through the reserved holes on the other side of the bottom angle steel 13 and the reserved holes at the end of the lower flange 53 of the steel beam 5 and are connected and fixed by nuts.

[0068] Two or more perforated stiffening plates 10 are arranged in parallel between the upper flange 51 and the lower flange 53 at the two ends of the steel beam 5 and on both sides of the web 52. A steering block 11 is arranged on the stiffening plate 10. Each set of stiffening plates 10 and steering blocks 11 is provided with a reserved hole for passing the prestressed steel cable 7. The height of the reserved hole gradually increases from the inside to the outside. The prestressed steel cable 7 is arranged on the steel beam 5 in the form of arc curves at both ends and a straight line in the middle through the stiffening plates 10 and the steering blocks 11. Prestressed steel cables 7 are passed through the reserved holes of the stiffening plate 10 and the steering block 11 between the lower flanges 53 and on both sides of the web 52 to form a prestressed steel beam; a shear connector 9 is provided on the top of the upper flange 51 of the steel beam 5, and the precast concrete slab 20 is placed on the prestressed steel beam with the shear connector 9. The upper end of the shear connector 9 passes through the reserved holes of the precast concrete slab 20 and is fixed by a nut, and high-strength mortar 18 is poured in the reserved holes of the precast concrete slab 20 to form a separated prestressed composite beam 4.

[0069] like Figure 7 As shown, the structure of the end plate-single-side bolt connection is as follows:

[0070] At the connection between the I-beam column 2 and the steel beam 5, the I-beam column 2 and the end of the steel beam 5 are connected by oppositely arranged end plates 19, an end plate 19 is provided at the end of the steel beam 5 and a reserved hole is provided on the end plate 19, and reserved holes corresponding to the end plate 19 are provided on the two sides corresponding to the I-beam column 2 and the steel beam 5, and high-strength bolts 14 are passed through the reserved holes of the end plate 19 and the reserved holes on the side of the I-beam column 2 and are fixed by nuts.

[0071] Two or more perforated stiffening plates 10 are arranged in parallel between the upper flange 51 and the lower flange 53 at the two ends of the steel beam 5 and on both sides of the web 52. A steering block 11 is arranged on the stiffening plate 10. Each set of stiffening plates 10 and steering blocks 11 is provided with a reserved hole for passing the prestressed steel cable 7. The height of the reserved hole gradually increases from the inside to the outside. The prestressed steel cable 7 is arranged on the steel beam 5 in the form of arc curves at both ends and a straight line in the middle through the stiffening plates 10 and the steering blocks 11. Prestressed steel cables 7 are passed through the reserved holes of the stiffening plate 10 and the steering block 11 between the lower flanges 53 and on both sides of the web 52 to form a prestressed steel beam; a shear connector 9 is provided on the top of the upper flange 51 of the steel beam 5, and the precast concrete slab 20 is placed on the prestressed steel beam with the shear connector 9. The upper end of the shear connector 9 passes through the reserved holes of the precast concrete slab 20 and is fixed by a nut, and high-strength mortar 18 is poured in the reserved holes of the precast concrete slab 20 to form a separated prestressed composite beam 4.

[0072] like Figure 1-Figure 7 As shown, the construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams of the present invention is as follows:

[0073] 1. Steel pipe column and prestressed composite beam frame structure

[0074] (1) Embedded bolt-angle steel connection ( Figure 4 )

[0075] Component production:

[0076] 1) Fabrication of steel pipe columns: A steel pipe column 1 with embedded bolts 8 is fabricated according to design requirements.

[0077] 2) Production of integral prestressed composite beam 3. The steel beam 5 is produced according to the design requirements, two rows of shear connectors 9 are welded on the top of the upper flange 51 of the steel beam 5, reserved holes for inserting high-strength bolts 14 are set on the lower flange 53 and the end of the web 52 of the steel beam 5, and concrete 6 is poured on the top of the steel beam 5 to form an integral steel and concrete composite beam; two or more perforated stiffening plates 10 (for anchoring steel cables) are arranged in parallel between the upper flange 51 and the lower flange 53 at a distance at both ends of the steel beam 5 and on both sides of the web 52, and a steering block 11 is arranged on the stiffening plate 10. The function of the steering block 11 is to avoid local stress concentration at the position where the prestressed steel cable 7 is inserted through the stiffening plate 10, so as to realize the curved arrangement of the prestressed steel cable 7. Prestressed steel cables 7 are passed through the reserved holes of the stiffening plate 10 and the steering block 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52, and the prestressed steel cables 7 are tensioned to form an integral prestressed composite beam 3.

[0078] Component Installation:

[0079] The integral prestressed composite beam 3 is docked to the connection position of the steel pipe column 1, the side angle steel 12 is attached to the web 52 of the steel beam 5 and the connection between the steel pipe column 1, the embedded bolts 8 are inserted into the reserved holes of the side angle steel 12, and the high-strength bolts 14 are passed through the side angle steel 12 and the reserved holes at the ends of the web 52 of the steel beam 5. The embedded bolts 8 and the high-strength bolts 14 are fixed with nuts respectively to connect the web 52 of the steel beam 5 with the steel pipe column 1; the bottom angle steel 13 is attached to the lower flange 5 of the steel beam 5 At the connection between the bottom of the steel beam 5 and the steel pipe column 1, the embedded bolts 8 are inserted into the reserved holes of the bottom angle steel 13, and a pad 15 is arranged between the bottom angle steel 13 and the bottom of the lower flange 53 of the steel beam 5. The high-strength bolts 14 are passed through the reserved holes of the lower flange 53 of the steel beam 5, the bottom angle steel 13 and the pad 15. The embedded bolts 8 and the high-strength bolts 14 are fixed with nuts respectively, and the lower flange 53 of the steel beam 5 is connected to the steel pipe column 1, so as to form a node between the steel pipe column and the prefabricated integral prestressed composite beam frame.

[0080] (2) External reinforcement ring-steel plate connection ( Figure 5 )

[0081] Component production:

[0082] 1) Fabrication of steel pipe column: A steel pipe column 1 with an outer ring plate 16 is fabricated according to design requirements, and a connecting steel plate 17 is welded at the connection position of the outer ring plate 16 and a reserved hole is set.

[0083] 2) Production of integral prestressed composite beam 3. The steel beam 5 is produced according to the design requirements, two rows of shear connectors 9 are welded on the top of the upper flange 51 of the steel beam 5, a connecting steel plate 17 is welded at the end of the steel beam 5 and a reserved hole is set on the connecting steel plate 17, and concrete 6 is poured on the top of the steel beam 5 to form an integral steel and concrete composite beam; two or more perforated stiffening plates 10 (for anchoring steel cables) are arranged in parallel between the upper flange 51 and the lower flange 53 at a distance at both ends of the steel beam 5 and on both sides of the web 52, and a steering block 11 is arranged on the stiffening plate 10, and prestressed steel cables 7 are passed through the reserved holes of the stiffening plates 10 and the steering blocks 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52, and the prestressed steel cables 7 are tensioned to form an integral prestressed composite beam 3.

[0084] Component Installation:

[0085] Connect the integral prestressed composite beam 3 to the connection of the outer ring plate 16, pass the high-strength bolts 14 through the reserved holes of the connecting steel plate 17 at the end of the steel beam 5 and the connecting steel plate 17 on the outer ring plate 16, fix them with nuts, and then pour high-strength mortar 18 into the gap on the upper part of the outer ring plate 16 to form a node between the steel pipe column and the prefabricated integral prestressed composite beam frame.

[0086] 2. I-beam column and prestressed composite beam frame structure

[0087] (1) Angle steel-bolt connection ( Figure 6 )

[0088] Component production:

[0089] 1) Fabrication of I-beam columns. Fabricate I-beam columns 2 according to design requirements and set reserved holes at the connection positions.

[0090] 2) Fabrication of prestressed steel beams. The steel beam 5 is fabricated according to the design requirements. Two rows of shear connectors 9 are welded on the top of the upper flange 51 of the steel beam 5. Pre-set holes for inserting high-strength bolts 14 are set at the lower flange 53 and the end of the web 52 of the steel beam 5. Two or more stiffening plates 10 with holes (for anchoring steel cables) are set in parallel between the upper flange 51 and the lower flange 53 at a distance from the two ends of the steel beam 5 and on both sides of the web 52. A steering block 11 is set on the stiffening plate 10. Prestressed steel cables 7 are inserted through the reserved holes of the stiffening plate 10 and the steering block 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52. The prestressed steel cables 7 are tensioned to form a prestressed steel beam.

[0091] 3) Concrete slab production: A prefabricated concrete slab 20 with pre-set holes is produced according to the design requirements, and the spacing between the pre-set holes is set according to the spacing between the shear connectors 9 .

[0092] Component Installation:

[0093] 1) Composite beam installation: The precast concrete slab 20 is placed on the prestressed steel beam welded with the shear connector 9. The upper end of the shear connector 9 passes through the reserved hole of the precast concrete slab 20 and is fixed by a nut. Then, high-strength mortar 18 is poured in the reserved hole of the precast concrete slab 20 to form a separated prestressed composite beam 4.

[0094] 2) Node installation: connect the separated prestressed composite beam 4 to the connection position of the I-beam column 2, attach the side angle steel 12 to the web 52 of the steel beam 5 and the connection between the I-beam column 2, insert the high-strength bolts 14 into the reserved holes between the end of the web 52 of the steel beam 5 and the side angle steel 12, and the reserved holes between the I-beam column 2 and the side angle steel 12, and fix the high-strength bolts 14 with nuts to connect the web 52 of the steel beam 5 with the I-beam column 2; attach the bottom angle steel 13 to the bottom of the lower flange 53 of the steel beam 5 and the connection between the I-beam column 2, insert the high-strength bolts 14 into the reserved holes between the I-beam column 2 and the bottom angle steel 13, and the bottom angle steel 13 and the lower flange 53 of the steel beam 5, and fix the high-strength bolts 14 with nuts to connect the lower flange 53 of the steel beam 5 with the I-beam column 2. Thus, a frame node between the I-beam column and the prefabricated separated prestressed composite beam is formed.

[0095] (2) End plate - single-side bolt connection ( Figure 7 )

[0096] Component production:

[0097] 1) Fabrication of I-beam columns. Fabricate I-beam columns 2 according to design requirements and set reserved holes at the connection positions.

[0098] 2) Fabrication of prestressed steel beams. Fabricate the steel beam 5 according to the design requirements, weld two rows of shear connectors 9 on the top of the upper flange 51 of the steel beam 5, weld an end plate 19 with reserved holes on the end of the steel beam 5, and set two or more stiffening plates 10 with holes (for anchoring steel cables) in parallel between the upper flange 51 and the lower flange 53 at a distance from the two ends of the steel beam 5 and on both sides of the web 52. Set a steering block 11 on the stiffening plate 10, pass prestressed steel cables 7 through the reserved holes of the stiffening plate 10 and the steering block 11 between the upper flange 51 and the lower flange 53 of the steel beam 5 and on both sides of the web 52, and tension the prestressed steel cables 7 to form a prestressed steel beam with connected end plates.

[0099] 3) Concrete slab production: A prefabricated concrete slab 20 with pre-set holes is produced according to the design requirements, and the spacing between the pre-set holes is set according to the spacing between the shear connectors 9 .

[0100] Component Installation:

[0101] 1) Composite beam installation: The precast concrete slab 20 is placed on the prestressed steel beam welded with the shear connector 9. The upper end of the shear connector 9 passes through the reserved hole of the precast concrete slab 20 and is fixed by a nut. Then, high-strength mortar 18 is poured in the reserved hole of the precast concrete slab 20 to form a separated prestressed composite beam 4.

[0102] 2) Node installation: connect the separated prestressed composite beam 4 to the connection position of the I-beam column 2, insert the high-strength bolts 14 into the reserved holes of the end plate 19 and the I-beam column 2, fix the high-strength bolts 14 with nuts, and connect the steel beam 5 to the I-beam column 2 through the end plate 19 to form a node between the I-beam column and the prefabricated separated prestressed composite beam frame.

[0103] In the present invention, the performance grade of the high-strength bolt 14 is above grade 8.8, and the strength grade of the high-strength mortar 18 is above grade M10.

Claims

1. A lightweight assembled frame of steel columns and prefabricated prestressed composite beams, characterized in that: It includes one or a combination of steel tube column and prestressed composite beam frame structure, I-beam column and prestressed composite beam frame structure. The steel tube column and prestressed composite beam frame structure is one or a combination of embedded bolt-angle steel connection form, external reinforcement ring-steel plate connection form, and the I-beam column and prestressed composite beam frame structure is one or a combination of angle steel-bolt connection form, end plate-single-side bolt connection form.

2. The light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 1 is characterized in that: The structure of the embedded bolt-angle steel connection is as follows: At the connection between the steel pipe column and the steel beam, the steel pipe column and the web of the steel beam are connected by a side angle steel, and the steel pipe column is provided with an embedded bolt connected to the side angle steel, the embedded bolt is passed through the reserved hole on one side of the side angle steel and is fixed by a nut, and the high-strength bolt is passed through the reserved hole on the other side of the side angle steel, the reserved hole at the end of the web of the steel beam and is fixed by a nut; At the connection between the steel pipe column and the steel beam, the steel pipe column and the lower flange of the steel beam are connected by a bottom angle steel, and the steel pipe column is provided with an embedded bolt connected to the bottom angle steel, the embedded bolt is passed through the reserved hole on one side of the bottom angle steel and is fixed by a nut; a pad is arranged between the bottom angle steel and the bottom of the lower flange of the steel beam, and the high-strength bolt is passed through the reserved hole on the other side of the bottom angle steel, the reserved hole of the pad, the reserved hole at the end of the lower flange of the steel beam and is fixed by a nut; A shear connector is provided at the top of the upper flange of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are provided in parallel between the upper flange and the lower flange at both ends of the steel beam and on both sides of the web, and steering blocks are provided on the stiffening plates. Each set of stiffening plates and steering blocks are provided with reserved holes for passing prestressed steel cables, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks; prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form an integral prestressed composite beam.

3. The light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 1 is characterized in that: The structure of the outer reinforcement ring-steel plate connection is as follows: At the connection between the steel pipe column and the steel beam, the outer ring plate of the steel pipe column and the end of the steel beam are connected by relatively arranged connecting steel plates, connecting steel plates are respectively arranged on both sides of the outer ring plate and reserved holes are arranged on the connecting steel plates, and connecting steel plates are arranged on the ends of the steel beam and reserved holes are arranged on the connecting steel plates, and high-strength bolts are passed through the reserved holes of the relatively arranged connecting steel plates and fixed by nuts; A shear connector is provided at the top of the upper flange of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at both ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Each group of stiffening plates and steering blocks are relatively provided with reserved holes for passing prestressed steel cables, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form an integral prestressed composite beam.

4. The light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 1 is characterized in that: The structure of the angle steel-bolt connection is as follows: At the connection between the I-beam column and the steel beam, reserved holes corresponding to the side angle steels are arranged on both sides of the I-beam column corresponding to the steel beam, and a reserved hole is arranged at the end of the web of the steel beam. High-strength bolts are passed through the reserved holes on one side of the side angle steel, the reserved holes on the side of the I-beam column, and are connected and fixed by nuts. High-strength bolts are passed through the reserved holes on the other side of the side angle steel, the reserved holes on the end of the web of the steel beam, and are connected and fixed by nuts. At the connection between the I-beam column and the steel beam, reserved holes corresponding to the bottom angle steels are arranged on both sides of the I-beam column corresponding to the steel beam, and a reserved hole is arranged at the end of the lower flange of the steel beam. High-strength bolts are passed through the reserved holes on one side of the bottom angle steel, the reserved holes on the side of the I-beam column, and are connected and fixed by nuts. High-strength bolts are passed through the reserved holes on the other side of the bottom angle steel, the reserved holes on the end of the lower flange of the steel beam, and are connected and fixed by nuts. Two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at the two ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Reservation holes for passing prestressed steel cables are opened relatively in each group of stiffening plates and steering blocks, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form a prestressed steel beam; a shear connector is arranged on the top of the upper flange of the steel beam, and a precast concrete slab is placed on the prestressed steel beam with the shear connector. The upper end of the shear connector passes through the reserved holes of the precast concrete slab and is fixed by a nut, and high-strength mortar is poured in the reserved holes of the precast concrete slab to form a separated prestressed composite beam.

5. The light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 1 is characterized in that: The structure of the end plate-single-side bolt connection is as follows: At the connection between the I-beam column and the steel beam, the I-beam column and the end of the steel beam are connected by oppositely arranged end plates, the end of the steel beam is provided with an end plate and a reserved hole is provided on the end plate, and the two sides of the I-beam column corresponding to the steel beam are provided with reserved holes corresponding to the end plate, and high-strength bolts are inserted through the reserved holes of the end plate and the reserved holes on the side of the I-beam column and fixed by nuts; Two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at the two ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Reservation holes for passing prestressed steel cables are opened relatively in each group of stiffening plates and steering blocks, and the height of the reserved holes gradually increases from the inside to the outside. The prestressed steel cables are arranged on the steel beam in the form of arc curves at both ends and a straight line in the middle through the stiffening plates and steering blocks. The prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web to form a prestressed steel beam; a shear connector is arranged on the top of the upper flange of the steel beam, and a precast concrete slab is placed on the prestressed steel beam with the shear connector. The upper end of the shear connector passes through the reserved holes of the precast concrete slab and is fixed by a nut, and high-strength mortar is poured in the reserved holes of the precast concrete slab to form a separated prestressed composite beam.

6. The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 2 is characterized in that: In the steel pipe column and prestressed composite beam frame structure, the embedded bolt-angle steel connection form includes the following steps: (1) Component production 1) Make steel pipe columns with embedded bolts; 2) Production of integral prestressed composite beam 3 Two rows of shear connectors are welded on the top of the upper flange of the steel beam, reserved holes for inserting high-strength bolts are set on the lower flange and the end of the web of the steel beam, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates; prestressed steel cables are inserted between the upper flange and the lower flange of the steel beam and on both sides of the web through the reserved holes of the stiffening plates and the steering blocks, and the prestressed steel cables are tensioned to form an integral prestressed composite beam; (2) Component Installation The integral prestressed composite beam is docked to the connection position of the steel pipe column, the side angle steel is attached to the web of the steel beam and the connection of the steel pipe column, the embedded bolts are inserted into the reserved holes of the side angle steel, the high-strength bolts are inserted into the reserved holes of the side angle steel and the web end of the steel beam, the embedded bolts and the high-strength bolts are fixed with nuts respectively, and the web of the steel beam is connected to the steel pipe column; the bottom angle steel is attached to the bottom of the lower flange of the steel beam and the connection of the steel pipe column, the embedded bolts are inserted into the reserved holes of the bottom angle steel, a pad is arranged between the bottom angle steel and the bottom of the lower flange of the steel beam, the high-strength bolts are inserted into the reserved holes of the lower flange of the steel beam, the bottom angle steel and the pad, the embedded bolts and the high-strength bolts are fixed with nuts respectively, and the lower flange of the steel beam is connected to the steel pipe column to form a frame node between the steel pipe column and the prefabricated integral prestressed composite beam.

7. The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 3 is characterized in that: In the steel tube column and prestressed composite beam frame structure, the external reinforcement ring-steel plate connection includes the following steps: (1) Component production 1) Make a steel pipe column with an outer ring plate, weld the connecting steel plate at the connection position of the outer ring plate and set a reserved hole; 2) Fabrication of integral prestressed composite beams Two rows of shear connectors are welded on the top of the upper flange of the steel beam, connecting steel plates are welded on the ends of the steel beam and reserved holes are set on the connecting steel plates, and concrete is poured on the top of the steel beam to form an integral steel and concrete composite beam; two or more stiffening plates with holes are parallelly set between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are set on the stiffening plates. Prestressed steel cables are passed through the reserved holes of the stiffening plates and the steering blocks between the upper flange and the lower flange of the steel beam and on both sides of the web, and the prestressed steel cables are tensioned to form an integral prestressed composite beam; (2) Component Installation Connect the integral prestressed composite beam to the connection of the outer ring plate, pass the high-strength bolts through the reserved holes of the connecting steel plate at the end of the steel beam and the connecting steel plate on the outer ring plate, fix them with nuts, and then pour high-strength mortar into the gap on the upper part of the outer ring plate to form a node between the steel pipe column and the prefabricated integral prestressed composite beam frame.

8. The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 4 is characterized in that: In the I-beam column and prestressed composite beam frame structure, the angle steel-bolt connection form includes the following steps: (1) Component production 1) Make I-beam columns and set reserved holes at the connection positions; 2) Prestressed steel beam production Two rows of shear connectors are welded on the top of the upper flange of the steel beam, reserved holes for inserting high-strength bolts are set on the lower flange and the end of the web of the steel beam, and two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and steering blocks are arranged on the stiffening plates. Prestressed steel cables are inserted between the upper flange and the lower flange of the steel beam and on both sides of the web through the reserved holes of the stiffening plates and the steering blocks, and the prestressed steel cables are tensioned to form a prestressed steel beam; 3) Make a precast concrete slab with reserved holes, and the spacing between the reserved holes is set according to the spacing of the shear connectors; (2) Component Installation 1) Composite beam installation: The precast concrete slab is placed on the prestressed steel beam with a shear connector welded thereto. The upper end of the shear connector passes through the reserved hole of the precast concrete slab and is fixed by a nut. High-strength mortar is then poured into the reserved hole of the precast concrete slab to form a separated prestressed composite beam. 2) Node installation: connect the separated prestressed composite beam to the connection position of the I-beam column, attach the side angle steel to the web of the steel beam and the connection between the I-beam column, insert the high-strength bolts into the reserved holes between the web end of the steel beam and the side angle steel, and the reserved holes between the I-beam column and the side angle steel, and fix the high-strength bolts with nuts to connect the web of the steel beam to the I-beam column; attach the bottom angle steel to the bottom of the lower flange of the steel beam and the connection between the I-beam column, and insert the high-strength bolts through the reserved holes between the I-beam column and the bottom angle steel, and the reserved holes between the bottom angle steel and the lower flange of the steel beam, and fix the high-strength bolts with nuts to connect the lower flange of the steel beam to the I-beam column; thereby, a frame node between the I-beam column and the prefabricated separated prestressed composite beam is formed.

9. The construction process of the light-weight assembled frame of steel columns and prefabricated prestressed composite beams according to claim 5 is characterized in that: In the I-beam column and prestressed composite beam frame structure, the end plate-single-side bolt connection form includes the following steps: (1) Component production 1) Make I-beam columns and set reserved holes at the connection positions; 2) Prestressed steel beam production Two rows of shear connectors are welded on the top of the upper flange of the steel beam, an end plate with a reserved hole is welded on the end of the steel beam, and two or more stiffening plates with holes are arranged in parallel between the upper flange and the lower flange at a distance at both ends of the steel beam and on both sides of the web, and a steering block is arranged on the stiffening plate. Prestressed steel cables are passed through the reserved holes of the stiffening plate and the steering block between the upper flange and the lower flange of the steel beam and on both sides of the web, and the prestressed steel cables are tensioned to form a prestressed steel beam with a connected end plate; 3) Make a precast concrete slab with reserved holes, and the spacing between the reserved holes is set according to the spacing of the shear connectors; (2) Component Installation 1) Composite beam installation: The precast concrete slab is placed on the prestressed steel beam with a shear connector welded thereto. The upper end of the shear connector passes through the reserved hole of the precast concrete slab and is fixed by a nut. Then, high-strength mortar is poured in the reserved hole of the precast concrete slab to form a separated prestressed composite beam. 2) Node installation: connect the separated prestressed composite beam to the connection position of the I-beam column, insert the high-strength bolts into the reserved holes of the end plate and the I-beam column, fix the high-strength bolts with nuts, connect the steel beam to the I-beam column through the end plate, and form a node between the I-beam column and the prefabricated separated prestressed composite beam frame.

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