A pre-tensioned prestressed frame assembly structure system and a construction method thereof

Abstract

The application discloses a kind of pre-tension prestressed frame assembly structure system and its construction method, it includes concrete column, pre-tension prestressed thin bottom composite beam, pre-tension prestressed thin bottom composite board, post-tying steel framework and post-cast concrete, wherein, concrete column can be cast-in-place or prefabricated, column is made to floor place and reserves reinforcement and post-cast area;The pre-tension prestressed thin bottom composite beam is composed of prestressed steel strand, thinner concrete beam bottom plate, stirrup, beam reinforcing rib, wherein, prestressed steel strand is used as part of force longitudinal reinforcement, beam bottom plate is laid with non-prestressed reinforcement, non-prestressed reinforcement includes bottom and top longitudinal reinforcement, stirrup, wherein longitudinal reinforcement is anchored into concrete column, meets specification seismic requirement, enhances the overall performance and ductility of structure.The application is laid with steel reinforcement perpendicular to reinforcing rib on the bottom plate of pre-tension prestressed thin bottom composite board, reinforcing rib has hole, steel reinforcement can be passed through reinforcing rib, composite floor can be bidirectional force transmission, and the overall structure is comparable to cast-in-place.

Description

Technical Field

[0001] This invention relates specifically to the field of building engineering technology, and more specifically to a prestressed frame assembly structure system and its construction method. Background Technology

[0002] Prefabricated concrete structures are one of the important structural systems for realizing the modernization of the construction industry. Ordinary prefabricated concrete structures are generally constructed by disassembling components according to the cast-in-place concrete structure. After being prefabricated in the factory, they are installed on site, and then some steel bars are tied and cast-in-place concrete is poured. Such prefabricated structures have heavier and more complex components, lower material strength, more severe collisions between installed components, and poorer overall structural performance. They cannot take advantage of factory prefabrication and instead make construction more complicated and the project cost higher.

[0003] Prestressed prefabricated frame structures are mainly divided into post-tensioned prestressed prefabricated frame structures and pre-tensioned prestressed prefabricated frame structures. Existing prestressed prefabricated frame structures have very large components, resulting in low hoisting and transportation efficiency, poor overall structural performance, and non-prestressed steel bars that cannot be anchored into the core area of ​​beams and columns, leading to poor seismic ductility.

[0004] In existing prefabricated structures, the slab span is small, there are many secondary beams, and the stiffness of the main beams is significantly weakened due to the location of the secondary beams. The efficiency of main beam fabrication and hoisting is very low. Alternatively, the main and secondary beams are connected by hinges, resulting in poor overall structural integrity. The presence of many secondary beams reduces the net height of the building's interior space, and the abundance of secondary beams in rooms also affects the building's interior space. Summary of the Invention

[0005] Therefore, this invention proposes a prestressed frame assembly structure system and its construction method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a prestressed prestressed frame assembly structure system, comprising concrete columns, prestressed prestressed thin-bottom composite beams, prestressed prestressed thin-bottom composite slabs, post-stressed steel reinforcement cages, and post-cast concrete. The concrete columns are either cast-in-place or precast, with the internal reinforcement configured according to engineering design requirements. The prestressed prestressed composite beams are prestressed prestressed thin-bottom composite beams, composed of a relatively thin high-strength concrete base slab, open stirrups, prestressed high-strength steel reinforcement, and reinforcing ribs, wherein the reinforcing ribs can be steel pipe trusses, concrete ribs, steel plate or steel pipe ribs, etc. The prestressed composite slab is a prestressed prestressed composite slab, composed of a thin concrete base slab, reinforcing ribs, weight-reducing blocks, and high-strength prestressed steel wires, wherein the reinforcing ribs can be steel pipe trusses, concrete ribs, steel plate or steel pipe ribs, etc. When the floor slab is thick, weight-reducing blocks can be added to reduce the structural self-weight. The concrete columns are poured to the floor level, with the reinforcing bars having reserved lap lengths for the fabrication of the upper concrete columns. The pre-tensioned prestressed composite beams, after being fabricated in the factory, are installed at the floor level. The pre-tensioned high-strength reinforcing bars are anchored to the core area of ​​the concrete columns, and other non-prestressed reinforcing bars, including stirrups, bottom longitudinal bars, and bottom longitudinal bars, are placed on the prestressed beams. The longitudinal bars are anchored into the core area of ​​the concrete columns according to structural stress requirements. The pre-tensioned prestressed composite slabs, also fabricated in the factory, are placed at the floor assembly points, with the slab ends resting on the pre-tensioned prestressed composite beams. After assembly, non-prestressed reinforcing bars are placed perpendicular to the floor slabs to connect the pre-tensioned prestressed composite slabs into a single unit. The reinforcing bars are also connected to the reinforcing bar skeleton on the pre-tensioned prestressed composite beams. After the reinforcing bar skeleton is tied, beam side formwork is installed as needed, and post-cast concrete is poured to form an integral pre-tensioned prestressed frame structure.

[0007] This invention employs prestressed thin-plate composite beams and lays non-prestressed steel bars on the thin plates, effectively solving the problems of steel bar interference in traditional precast frame structures, the inability of non-prestressed steel bars in prestressed precast structures to enter the supports, complex on-site installation, and poor seismic ductility of the structure.

[0008] The prestressed thin-bottom composite slab is composed of high-strength prestressed steel wires, a thin high-strength concrete slab bottom plate, weight-reducing blocks, and slab reinforcing ribs, wherein the high-strength prestressed steel wires serve as reinforcing steel bars.

[0009] The post-stressed steel reinforcement cage consists of non-prestressed longitudinal reinforcement bars at the bottom of the beam, the top of the beam, the bottom of the slab, and the top of the slab.

[0010] Furthermore, as a preferred embodiment, the precast concrete portion of the prestressed thin-bottom composite beam is configured as a relatively thin high-strength concrete beam base plate, and the non-prestressed longitudinal reinforcement and stirrup reinforcement skeleton of the beam can be laid on the relatively thin high-strength concrete beam base plate, and the thickness of the relatively thin high-strength concrete beam base plate is set to 50-200mm.

[0011] Furthermore, as a preferred option, the non-prestressed longitudinal reinforcement of the beam can be anchored to the post-cast area of ​​the concrete column floor in accordance with the requirements of the seismic design code, and can be flexibly arranged according to the requirements of the code.

[0012] Furthermore, as a preferred embodiment, the prestressed thin-bottom composite beam employs beam reinforcing ribs to strengthen the flexural strength, stiffness, and shear strength of the precast thin-bottom concrete portion.

[0013] Furthermore, as a preferred embodiment, the prestressed thin-bottom composite beam is stressed in the post-cast area where the high-strength prestressed steel strands of the beam are anchored to the concrete column floor.

[0014] Furthermore, as a preferred embodiment, the precast concrete portion of the prestressed thin-bottom composite slab is configured as a thin high-strength concrete slab base plate, with holes left at the junction of the thin high-strength concrete slab base plate and the slab reinforcing ribs, and the thickness of the thin high-strength concrete slab base plate is set to 30-100mm.

[0015] Furthermore, as a preferred embodiment, the prestressed thin-bottom composite slab is reinforced with plate stiffening ribs to enhance the flexural strength, flexural stiffness, and shear strength of the precast concrete portion.

[0016] Furthermore, as a preferred embodiment, the thinner high-strength concrete slab bottom plate is provided with multiple slab reinforcing ribs, and multiple weight-reducing blocks are laid at equal intervals on each slab reinforcing rib. A gap for tying reinforcing bars is left between each two adjacent weight-reducing blocks, and the width of the gap is set to 120-400mm.

[0017] Furthermore, as a preferred embodiment, the prestressed thin-bottom composite slab is installed above the thinner high-strength concrete beam bottom slab.

[0018] A construction method for a prestressed frame assembly structure system includes the following steps:

[0019] S1: The detailed design drawings for concrete columns, prestressed thin-bottom composite beams, and prestressed thin-bottom composite slabs have been completed. The concrete columns are selected for factory prefabrication or on-site casting according to the design requirements.

[0020] S2: The factory processes the prefabricated components according to the detailed drawings;

[0021] S3: Component transportation and hoisting into place;

[0022] S4: First, pour or hoist the concrete column to the floor height, and set some supports under the prestressed thin-bottom composite beam;

[0023] S5: Hoist the prestressed composite beam and place it on the concrete column;

[0024] S6: Hoist the pre-tensioned prestressed thin-bottom composite slab and place it on the pre-tensioned prestressed composite beam;

[0025] S7: The non-prestressed longitudinal reinforcement of the beam is tied on the prestressed composite beam and the reinforcement is anchored into the concrete column.

[0026] S8: Pass the non-prestressed longitudinal reinforcement of the beam through the reinforcing rib on the pre-tensioned prestressed thin-bottom composite slab. The non-prestressed longitudinal reinforcement of the beam on the bottom slab is perpendicular to the slab reinforcing rib. Then lay the slab surface reinforcement.

[0027] S9: Post-cast concrete pouring for beams, slabs and columns, forming an integral prestressed frame structure.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. The prestressed thin-bottom composite beam in this invention has a lighter self-weight, higher strength, and greater stiffness.

[0030] 2. In this invention, the longitudinal reinforcement of the prestressed thin-bottom composite beam has high strength and high material efficiency.

[0031] 3. In this invention, the longitudinal reinforcement of the prestressed thin-bottom composite beam is relatively soft, and the installation process perfectly resolves the conflict between the reinforcements.

[0032] 4. The prestressed thin-bottom composite beam in this invention has extremely high transportation and installation efficiency.

[0033] 5. In this invention, the prestressed thin-bottom composite beam is reinforced with reinforcing ribs, resulting in high stiffness and requiring less on-site support.

[0034] 6. In this invention, non-prestressed ordinary steel bars are laid on the pre-tensioned prestressed thin-bottom composite beam, which facilitates component standardization, improves component ductility, and solves the problem of component seismic performance.

[0035] 7. The present invention uses pre-tensioned thin-bottom composite slabs, which are lightweight and have extremely high transportation and hoisting efficiency.

[0036] 8. The present invention uses prestressed thin-bottom composite slabs reinforced with reinforcing ribs, resulting in high component stiffness, large span, fewer secondary beams, fewer supports, and no formwork or timber.

[0037] 9. The present invention uses pre-tensioned prestressed thin-bottom composite slabs with steel bars laid perpendicular to the reinforcing ribs on the bottom plate. Holes are left on the reinforcing ribs so that the steel bars can pass through the reinforcing ribs. After the composite slab is built, the floor slab can transmit force in both directions, and the overall structural integrity is comparable to that of cast-in-place concrete. Attached Figure Description

[0038] Figure 1 This is a structural schematic diagram of a concrete column in a prestressed frame assembly structure system.

[0039] Figure 2This is a schematic diagram of a pre-tensioned prestressed thin-bottom composite slab in a pre-tensioned prestressed frame assembly structure system.

[0040] Figure 3 This is a schematic diagram of a pre-tensioned prestressed thin-bottom composite beam in a pre-tensioned prestressed frame assembly structure system.

[0041] Figure 4 This is a schematic diagram of a prestressed frame assembly structure system with post-stressed steel reinforcement cage.

[0042] Figure 5 This is a schematic diagram of a pre-tensioned prestressed frame assembly structure system according to one embodiment.

[0043] Figure 6 This is a schematic diagram of a second embodiment of a prestressed frame assembly structure system;

[0044] Figure 7 This is a schematic diagram of a third embodiment of a prestressed frame assembly structure system.

[0045] In the diagram: 1. Concrete column; 2. Prestressed steel pipe truss composite beam; 3. Prestressed steel pipe truss composite slab; 4. Post-stressed reinforcement cage; 5. Post-cast concrete; 6. Beam reinforcing rib; 7. Slab reinforcing rib; 8. Weight reduction block; 9. High-strength prestressed steel wire in slab; 10. High-strength prestressed steel strand in beam; 11. Non-prestressed longitudinal reinforcement in beam; 12. Thin high-strength concrete beam bottom slab; 13. Thin high-strength concrete slab bottom slab; 14. Stirrups. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1: Please refer to the appendix. Figure 1-5This invention provides a technical solution: a pre-tensioned prestressed frame assembly structure system, comprising cast-in-place concrete columns 1, pre-tensioned prestressed steel pipe truss composite beams 2, pre-tensioned prestressed steel pipe truss composite slabs 3, post-stressed steel reinforcement cages 4, and post-cast concrete 5. The pre-tensioned steel pipe truss composite beams 2 consist of a thin concrete base slab, open stirrups, high-strength prestressed steel strands 10, and beam reinforcing ribs 6. The pre-tensioned prestressed steel pipe truss composite slabs 3 consist of a thin concrete base slab, high-strength prestressed steel wires 9, and plate reinforcing ribs 7. Both beam and slab components are thin concrete base slabs. The post-stressed steel reinforcement cage 4 mainly includes longitudinal reinforcement with positive bending moment at the bottom of the beam, longitudinal reinforcement with negative bending moment at the surface of the beam, and stirrups. The post-stressed longitudinal reinforcement and the high-strength prestressed steel strands 10 are respectively anchored in the core area of ​​the column.

[0048] In this embodiment, concrete column 1 is a cast-in-place concrete column.

[0049] In this embodiment, the prestressed steel pipe truss composite beam 2 is a single-row prestressed steel pipe truss composite beam.

[0050] In this embodiment, the concrete base plate of the prestressed steel pipe truss composite beam 2 is relatively thin, with a thickness of 100-150mm.

[0051] In this embodiment, the prestressed steel pipe truss composite beam 2 includes an open hoop.

[0052] In this embodiment, non-prestressed steel reinforcement is laid on site on the pre-tensioned prestressed steel pipe truss composite beam 2. The non-prestressed steel reinforcement includes bottom longitudinal reinforcement and surface longitudinal reinforcement.

[0053] In this embodiment, the bottom longitudinal reinforcement, the surface longitudinal reinforcement, and the high-strength prestressed steel strand 10 of the beam are all anchored to the core area of ​​the concrete column.

[0054] In this embodiment, the prestressed steel pipe truss composite slab 3 is reinforced with steel pipe truss, and the thickness of the concrete base slab is 35-50mm.

[0055] In this embodiment, the prestressed steel pipe truss composite slab 3 is assembled closely. After assembly, transverse steel bars are arranged on the bottom slab, and surface negative bending moment steel bars are laid. All steel bars are anchored to the surrounding beams.

[0056] A construction method for a prestressed frame assembly structure system (Example 1) includes the following steps:

[0057] S1: Concrete column 1, prestressed steel pipe truss composite beam, and prestressed steel pipe truss composite slab have completed detailed design drawings, and concrete column 1 is poured on site.

[0058] S2: The factory processes the prestressed steel pipe truss composite beam and the prestressed steel pipe truss composite slab according to the detailed drawings;

[0059] S3: Component transportation and hoisting into place;

[0060] S4: First, pour or hoist the concrete column 1 to the floor height, and set some supports under the prestressed thin-bottom composite beam;

[0061] S5: Hoist the pre-tensioned prestressed steel pipe truss composite beam and place it on concrete column 1;

[0062] S6: Hoist the pre-tensioned prestressed steel pipe truss composite slab and place it on the pre-tensioned prestressed thin-bottom composite beam;

[0063] S7: Tie the non-prestressed longitudinal reinforcement 11 on the pre-tensioned prestressed thin-bottom composite beam, and anchor the non-prestressed longitudinal reinforcement 11 into the concrete column 1.

[0064] S8: The non-prestressed longitudinal reinforcement 11 of the beam passes through the steel pipe truss on the pre-tensioned prestressed thin-bottom composite slab. The non-prestressed longitudinal reinforcement 11 of the beam on the bottom slab is perpendicular to the slab reinforcing rib 7, and then the slab surface reinforcement is laid.

[0065] S9: Post-cast concrete pouring for beams, slabs, and columns, forming an integral prestressed frame structure (see appendix). Figure 5 ).

[0066] Example 2: Please refer to the appendix. Figure 1-4 In addition to 6, the present invention provides a second technical solution: a pre-tensioned prestressed frame assembly structure system, which comprises cast-in-place precast concrete columns 1, pre-tensioned prestressed steel pipe truss composite beams 2, pre-tensioned prestressed steel pipe truss composite slabs 3, post-stressed steel reinforcement skeletons 4, and post-cast concrete 5. The pre-tensioned steel pipe truss composite beams 2 are composed of a thin concrete base plate, open stirrups, high-strength prestressed steel strands 10, and beam reinforcing ribs 6; the pre-tensioned prestressed steel pipe truss composite slabs 3 are composed of a thin concrete base plate, weight-reducing blocks 8, high-strength prestressed steel wires 9, and plate reinforcing ribs 7; both beam and slab components are thin concrete base plates; the post-stressed steel reinforcement skeleton 4 includes longitudinal reinforcement with positive bending moment at the bottom of the beam, longitudinal reinforcement with negative bending moment at the surface of the beam, and stirrups; the post-stressed longitudinal reinforcement and the high-strength prestressed steel strands 10 are respectively anchored in the core area of ​​the column.

[0067] In this embodiment, the concrete column 1 is a cast-in-place precast concrete column.

[0068] In this embodiment, the prestressed steel pipe truss composite beam 2 adopts a double-row steel pipe truss prestressed composite beam, but a single-row steel pipe truss can also be used depending on the beam width.

[0069] In this embodiment, the concrete base plate of the prestressed steel pipe truss composite beam 2 is relatively thin, with a thickness of 100-150mm.

[0070] In this embodiment, the prestressed steel pipe truss composite beam 2 includes an open hoop.

[0071] In this embodiment, non-prestressed longitudinal reinforcement 11 is laid on the pre-tensioned prestressed steel pipe truss composite beam 2 on site. The non-prestressed longitudinal reinforcement 11 includes bottom longitudinal reinforcement, surface longitudinal reinforcement and stirrups.

[0072] In this embodiment, the bottom longitudinal reinforcement, the surface longitudinal reinforcement, and the high-strength prestressed steel strand 10 of the beam are all anchored to the core area of ​​the concrete column.

[0073] In this embodiment, the prestressed steel pipe truss composite slab 3 is reinforced with steel pipe truss, and the thickness of the concrete base slab is 45mm to 60mm.

[0074] In this embodiment, the prestressed steel pipe truss composite slab 3 is assembled closely. After assembly, transverse steel bars are arranged between the weight-reducing blocks 8 on the slab surface, and surface negative bending moment steel bars are laid. All steel bars are anchored to the surrounding beams.

[0075] A construction method for a prestressed frame assembly structure system (Example 2) includes the following steps:

[0076] S1: Concrete column 1, prestressed steel pipe truss composite beam 2, prestressed steel pipe truss composite slab 3 - complete detailed design drawings;

[0077] S2: The factory processes the pre-tensioned prestressed steel pipe truss composite beam 2 and the pre-tensioned prestressed steel pipe truss composite plate 3 with weight reduction blocks 8 according to the detailed drawings;

[0078] S3: Component transportation and hoisting into place;

[0079] S4: First, install the concrete column 1 to the floor height, then install some of the supports;

[0080] S5: Hoist the prestressed steel pipe truss composite beam 2 and place it on the concrete column 1;

[0081] S6: Hoist the pre-tensioned prestressed steel pipe truss composite slab 3 and place it on the pre-tensioned prestressed thin-bottom composite beam;

[0082] S7: The non-prestressed longitudinal reinforcement 11 of the beam is tied on the prestressed thin-bottom composite beam and the reinforcement is anchored into the concrete column.

[0083] S8: The non-prestressed longitudinal reinforcement 11 of the beam passes through the steel pipe truss between the bottom plate of the pre-tensioned prestressed thin-bottom composite slab and the weight reduction block 8. The non-prestressed longitudinal reinforcement 11 of the beam on the slab surface is perpendicular to the slab reinforcing rib 7, and then the slab surface reinforcement is laid.

[0084] S9: Post-cast concrete pouring for beams, slabs, and columns, forming an integral prestressed frame structure (see appendix). Figure 6 ).

[0085] Example 3: Please refer to the appendix. Figure 1-4 In addition to 7, the present invention provides a third technical solution: a pre-tensioned prestressed frame assembly structure system, which includes cast-in-place concrete columns 1, pre-tensioned prestressed steel pipe truss composite beams 2, pre-tensioned prestressed steel pipe truss composite slabs 3, post-stressed steel reinforcement skeletons 4, and post-cast concrete 5. The pre-tensioned prestressed steel pipe truss composite beams 2 are composed of a thin concrete base slab, open stirrups, high-strength prestressed steel strands 10, and beam reinforcing ribs 6. The pre-tensioned prestressed steel pipe rib composite slabs 3 are composed of a thin concrete base slab, high-strength prestressed steel wires 9, and plate reinforcing ribs 7. All beam and slab components are thin concrete base slabs. The post-stressed steel reinforcement skeleton 4 mainly includes longitudinal reinforcement with positive bending moment at the bottom of the beam, longitudinal reinforcement with negative bending moment at the surface of the beam, and stirrups. The post-stressed longitudinal reinforcement and the high-strength prestressed steel strands 10 are respectively anchored in the core area of ​​the column.

[0086] In this embodiment, concrete column 1 is a cast-in-place concrete column.

[0087] In this embodiment, the prestressed steel pipe truss composite beam 2 adopts a single-row steel pipe rib prestressed composite beam.

[0088] In this embodiment, the concrete base plate of the prestressed steel pipe truss composite beam 2 is relatively thin, with a thickness of 100-150mm.

[0089] In this embodiment, the prestressed steel pipe truss composite beam 2 includes an open hoop.

[0090] In this embodiment, non-prestressed longitudinal reinforcement 11 is laid on the pre-tensioned prestressed steel pipe truss composite beam 2 on site. The non-prestressed longitudinal reinforcement 11 includes bottom longitudinal reinforcement and surface longitudinal reinforcement.

[0091] In this embodiment, the bottom longitudinal reinforcement, the surface longitudinal reinforcement, and the high-strength prestressed steel strand 10 of the beam are all anchored to the core area of ​​the concrete column.

[0092] In this embodiment, the prestressed steel pipe truss composite slab 3 is reinforced with steel pipe truss, and the thickness of the concrete base slab is 35-50mm.

[0093] In this embodiment, the prestressed steel pipe truss composite slab 3 is assembled closely. After assembly, transverse steel bars are arranged on the slab surface, and surface negative bending moment steel bars are laid. All steel bars are anchored to the surrounding beams.

[0094] A construction method for a prestressed frame assembly structure system (Example 3) includes the following steps:

[0095] S1: Concrete column 1, prestressed steel pipe truss composite beam 2, prestressed steel pipe truss composite slab 3 have completed detailed design drawings, and concrete column 1 is poured on site;

[0096] S2: The factory processes the prestressed steel pipe truss composite beam 2 and the prestressed steel pipe truss composite slab 3 according to the detailed drawings;

[0097] S3: Component transportation and hoisting into place;

[0098] S4: First, pour or hoist the concrete column 1 to the floor height, and set some supports under the prestressed thin-bottom composite beam;

[0099] S5: Hoist the prestressed steel pipe truss composite beam 2 and place it on the concrete column 1;

[0100] S6: Hoist the pre-tensioned prestressed steel pipe truss composite slab 3 and place it on the pre-tensioned prestressed thin-bottom composite beam;

[0101] S7: The non-prestressed longitudinal reinforcement 11 of the beam is tied on the prestressed thin-bottom composite beam and the reinforcement is anchored into the concrete column.

[0102] S8: The non-prestressed longitudinal reinforcement 11 of the beam passes through the slab reinforcing rib 7 on the pre-tensioned prestressed thin-bottom composite slab. The non-prestressed longitudinal reinforcement 11 of the beam on the slab surface is perpendicular to the slab reinforcing rib 7. Then the slab surface reinforcement is laid.

[0103] S9: Post-cast concrete pouring for beams, slabs, and columns, forming an integral prestressed frame structure (see appendix). Figure 7 ).

[0104] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed prestressed frame assembly structure system, comprising concrete columns (1), prestressed thin-bottom composite beams, prestressed thin-bottom composite slabs, post-stressed steel reinforcement cages (4), and post-cast concrete (5), wherein, When a concrete column (1) is constructed to the floor height, a pre-reserved area for reinforcing bars and post-cast concrete is provided, characterized in that: The prestressed thin-bottom composite beam is composed of high-strength prestressed steel strands (10), a thin high-strength concrete bottom plate (12), stirrups (14), and beam reinforcing ribs (6), wherein the high-strength prestressed steel strands (10) serve as longitudinal reinforcing bars. The prestressed thin-bottom composite slab is composed of high-strength prestressed steel wire (9), a thin high-strength concrete slab bottom plate (13), a weight-reducing block (8), and slab reinforcing ribs (7), wherein the high-strength prestressed steel wire (9) serves as the reinforcing steel. The post-stitched steel reinforcement cage (4) includes longitudinal reinforcement with positive bending moment at the bottom of the beam, longitudinal reinforcement with negative bending moment at the top of the beam, and stirrups; The precast concrete portion of the prestressed thin-bottom composite beam is set as a thin high-strength concrete beam bottom plate (12), and non-prestressed longitudinal reinforcement (11) and stirrup reinforcement skeleton are laid on the thin high-strength concrete beam bottom plate (12). The thickness of the thin high-strength concrete beam bottom plate (12) is set to 50-200mm. The prestressed thin-bottom composite beam is stressed in the post-cast area where the high-strength prestressed steel strands (10) of the beam are anchored to the concrete column (1) floor. The precast concrete portion of the prestressed thin-bottom composite slab is set as a thin high-strength concrete slab base plate (13). Holes are left at the junction of the thin high-strength concrete slab base plate (13) and the slab reinforcing ribs (7). The thickness of the thin high-strength concrete slab base plate (13) is set to 30-100mm.

2. The prestressed frame assembly structure system according to claim 1, characterized in that: The non-prestressed longitudinal reinforcement (11) of the beam is anchored to the post-cast area of ​​the concrete column (1) floor in accordance with the requirements of the seismic design code.

3. The prestressed frame assembly structure system according to claim 1, characterized in that: The prestressed thin-bottom composite beam is reinforced with beam stiffeners (6) to enhance the flexural strength, stiffness and shear strength of the precast thin-bottom concrete portion.

4. The prestressed frame assembly structure system according to claim 1, characterized in that: The prestressed thin-bottom composite slab is reinforced with plate stiffeners (7) to enhance the flexural strength, flexural stiffness and shear strength of the precast concrete portion.

5. The prestressed frame assembly structure system according to claim 1, characterized in that: The thin high-strength concrete slab base plate (13) is provided with multiple slab reinforcing ribs (7), and multiple weight-reducing blocks (8) are laid at equal intervals on each slab reinforcing rib (7). A gap for tying steel bars is left between each two adjacent weight-reducing blocks (8), and the width of the gap is set to 120-400mm.

6. The prestressed frame assembly structure system according to claim 1, characterized in that: The prestressed thin-bottom composite slab is installed above the thinner high-strength concrete beam bottom slab (12).

7. A construction method for a prestressed frame assembly structure system as described in claim 1, characterized in that, Includes the following steps: S1: The detailed design of concrete column (1), prestressed thin-bottom composite beam and prestressed thin-bottom composite slab is completed. Concrete column (1) is selected to be prefabricated in the factory or cast on site according to the design requirements. S2: The factory processes the prefabricated components according to the detailed drawings; S3: Component transportation and hoisting into place; S4: First, pour or hoist the concrete column (1) to the floor height, and set some support under the prestressed thin-bottom composite beam; S5: Hoist the prestressed composite beam and place it on the concrete column (1); S6: Hoist the pre-tensioned prestressed thin-bottom composite slab and place it on the pre-tensioned prestressed composite beam; S7: Tie the non-prestressed longitudinal reinforcement (11) of the beam to the prestressed composite beam, and anchor the reinforcement to the concrete column; S8: The non-prestressed longitudinal reinforcement (11) of the top beam of the prestressed thin-bottom composite slab passes through the reinforcing rib, and the non-prestressed longitudinal reinforcement (11) of the top beam of the bottom slab is perpendicular to the reinforcing rib (7) of the slab, and then the slab surface reinforcement is laid. S9: Post-cast concrete pouring for beams, slabs and columns, forming an integral prestressed frame structure.

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