Floor system for self-centering frame structures and prefabricated assembly method

Abstract

The application discloses a floor system for a self-resetting frame structure and a prefabricated assembly method, the floor system comprising a frame column, a main beam, a secondary beam, a floor and a connecting accessory; the connecting accessory comprises a high-strength pull rod and a second friction plate, the main beam comprises a first main beam unit and a second main beam unit, and the first main beam unit and the second main beam unit are fixedly connected through the high-strength pull rod and the friction plate; the floor comprises a first floor unit, a second floor unit and high-strength steel bars, and the first floor unit and the second floor unit are connected through the high-strength steel bars and the second friction plate; one end of the main beam is embedded into the frame column, and the first floor unit and the second floor unit are fixedly connected with the secondary beam and the main beam through embedded parts. The floor system has an opening-closing mechanism, the constraint effect of the floor on the beam-column joint in the self-resetting frame structure is released, the beam-column joint and the floor can be deformed coordinately, and the post-earthquake recoverable performance of the frame structure can be effectively improved. Each component can be prefabricated in a factory, and on-site assembly is simple and convenient.

Description

A floor system for self-resetting frame structures and a prefabrication method thereof Technical Field

[0001] This invention relates to a floor system for a self-resetting frame structure and a prefabrication and assembly method, belonging to the field of building engineering structural technology. Background Technology

[0002] Self-resetting frame structures employ prestressed tendons and other self-resetting devices and energy dissipation devices, transforming the traditional rigid connection between beams and columns into a connection form that can both ensure the effective transmission of shear force and axial force at the beam ends and has an opening-closing mechanism. This approach can concentrate structural damage on the energy dissipation devices, keeping the frame structure in a low-damage or undamaged state under seismic loading.

[0003] In frame structures, floor slabs are an essential component, playing a crucial role in transferring vertical loads, horizontal inertial forces, and ensuring the overall structural stability. Compared to the overall stiffness of a recoverable frame structure, the overall stiffness of the floor slab itself restricts the opening-closing mechanism of frame joints, thus affecting the overall structural recoverability. For existing beam-column joints with self-resetting capabilities, when the frame is subjected to horizontal loads, openings may appear at the upper flange of the beam at the beam-column connection, causing floor slab cracking.

[0004] Furthermore, self-resetting structures require their internal components or overall structure to possess both restorative functionality and energy dissipation, but these two aspects are fundamentally contradictory. Currently, self-resetting frame structures mainly use prestressed components to achieve structural self-resetting. However, this method is not only structurally complex but also cumbersome in design and construction, hindering rapid post-earthquake recovery. Moreover, energy dissipators installed at beam-column joints have drawbacks such as being difficult to replace or aesthetically unappealing. Summary of the Invention

[0005] Objectives of the Invention: The first objective of this invention is to provide a floor system for self-resetting frame structures. This floor system has an opening-closing mechanism that relaxes the constraint of the floor system on the beam-column joints in the self-resetting frame structure, allowing the beam-column joints and the floor system to deform in coordination, thereby effectively improving the post-earthquake recoverability of the frame structure. The second objective of this invention is to provide a simple prefabrication and assembly method for this floor system of the self-resetting frame structure.

[0006] Technical Solution: This invention provides a floor system for a self-resetting frame structure, comprising frame columns, main beams, secondary beams, floor slabs, and connecting accessories. The connecting accessories include high-strength tie rods and friction plates. The main beams include a first main beam unit and a second main beam unit, which are fixedly connected by the high-strength tie rods and friction plates. The floor slabs include a first floor slab unit, a second floor slab unit, and high-strength reinforcing bars, which are connected by the high-strength reinforcing bars and friction plates. One end of the main beam is embedded in the frame column, and the first and second floor slab units are fixedly connected to the secondary beams and the main beams by embedded parts. The high-strength tie rods and friction plates enable the main beams to form an opening-closing mechanism corresponding to the secondary beams, achieving a self-resetting function. The high-strength reinforcing bars and friction plates also enable the floor slabs to form an opening-closing mechanism corresponding to the secondary beams, achieving a self-resetting function.

[0007] Furthermore, the first main beam unit includes a first H-shaped steel beam, which includes an embedded section and an extended section. The embedded section is located inside the frame column, and short beams are symmetrically welded to the upper and lower flanges of the embedded section. The extended section has a first longitudinal stiffening rib and a first transverse stiffening rib welded inside. The purpose of this is to form a hidden corbel between the first main beam unit and the frame column, thereby improving the shear force transmission mechanism at the frame joint. The second main beam unit includes a second H-shaped steel beam, and a second longitudinal stiffening rib and a second transverse stiffening rib are welded to one end of the second H-shaped steel beam.

[0008] Furthermore, both the first main beam unit and the second main beam unit are welded into a single structure, and both the first main beam unit and the second main beam unit are provided with bolt holes, the shapes of which include circular, strip-shaped and arc-shaped.

[0009] Furthermore, the connection point between the first main beam unit and the second main beam unit is set as a slope. This is done to improve the shear resistance of the main beam and to allow the second main beam unit to be placed directly on the overhang of the first main beam unit without the need for temporary support, thereby improving construction efficiency.

[0010] Furthermore, the secondary beam includes a first beam unit and a second beam unit. The first beam unit and the second beam unit are arranged in pairs above the position where the first main beam unit and the second main beam meet. They are then fixedly connected to the main beam as a whole by connecting accessories.

[0011] Furthermore, the first beam unit includes a first I-beam, one end of which is welded with a third longitudinal stiffener and a third transverse stiffener, and a plurality of fourth longitudinal stiffeners are welded to one side of the web of the first I-beam at a designed interval; the second beam unit includes a second I-beam, one end of which is welded with a fifth longitudinal stiffener and a fifth transverse stiffener, and a plurality of sixth longitudinal stiffeners are welded to one side of the web of the second I-beam at a designed interval.

[0012] Furthermore, both the first beam unit and the second beam unit are welded into a single integrated structure, and both the first beam unit and the second beam unit are provided with pre-drilled holes.

[0013] Furthermore, the first floor slab unit and the second floor slab unit are respectively arranged directly above the first beam unit and the second beam unit, and the first floor slab unit and the second floor slab unit are fixedly connected to the secondary beam and the main beam through embedded parts.

[0014] Furthermore, the embedded parts include a first type of embedded part and a second type of embedded part. Both types of embedded parts are steel structural members with anchor bolts and pre-drilled holes. The first type of embedded part is located inside the first floor slab unit and is fixedly connected to the upper flange of the first beam unit by bolts. The second type of embedded part is located inside the second floor slab unit and is fixedly connected to the upper flange of the second beam unit by bolts. The web of the first type of embedded part is connected to the web of the second type of embedded part and tied together by high-strength steel bars and connecting accessories. The purpose of this is to create an open-close mechanism between the first floor slab unit and the second floor slab unit that corresponds to the frame beam-column joint.

[0015] Furthermore, the connecting accessories also include a connecting plate and a pad; the friction plate includes a first friction plate, a second friction plate, and a third friction plate. The first friction plate is located at the junction of the first main beam unit and the second main beam unit. The first friction plate is fixedly connected to the first main beam unit and the second main beam unit by bolts. The first friction plate has reserved round holes and arc-shaped holes. The purpose of this is to allow the shear force of the node to be further transmitted through the friction of the main beam web, based on the force transmission of the hidden corbel formed by the first main beam unit and the frame column, thereby improving the shear resistance of the frame node and improving the energy dissipation capacity of the frame structure by utilizing the energy dissipation of the web friction.

[0016] Furthermore, the second friction plate is located at the junction of the first floor slab unit and the second floor slab unit, and the second friction plate is fixedly connected to the first floor slab unit and the second floor slab unit by anchor bolts; the second friction plate is provided with strip holes, which can realize friction energy dissipation when the first floor slab unit and the second floor slab unit are opened.

[0017] Furthermore, the third friction plate is positioned at the junction of the first beam unit and the second beam unit. The third friction plate is fixedly connected to the fourth longitudinal stiffening rib of the first beam unit and the sixth longitudinal stiffening rib of the second beam unit by bolts. The third friction plate is provided with round holes, strip holes, and reserved slots. The purpose of this is to allow the second floor slab unit fixed to the second beam unit to slide relative to the first floor slab unit fixed to the first beam unit through the strip holes on the third friction plate, thereby adapting to the opening-closing mechanism of the frame node. At the same time, the reserved slots allow the third friction plate to yield and dissipate energy, acting as an energy dissipator, and transferring structural damage from the frame node to the easily replaceable secondary beam.

[0018] Furthermore, the connecting plate is disposed on the lower flange at the junction of the first main beam unit and the second main beam unit, and the connecting plate is used to fix the lower flanges of the first main beam unit and the second main beam unit together by bolts.

[0019] Furthermore, the pad is a wedge-shaped steel plate, which is set at the junction of the first type of embedded part and the second type of embedded part.

[0020] Furthermore, the first friction plate, the second friction plate, the third friction plate, the connecting plate, and the pad are all provided with reserved holes, the shapes of which include circles, strips, and arcs.

[0021] The prefabrication and assembly method for a self-resetting frame structure floor system according to the present invention includes the following steps:

[0022] A. Precast main beams and frame columns:

[0023] A1. After welding the first H-shaped steel beam, short beam, first longitudinal stiffener and first transverse stiffener to form the first main beam unit, the first main beam unit is embedded in the frame column, and the steel bars are tied and the concrete is poured.

[0024] A2. Weld the second H-shaped steel beam, the second longitudinal stiffener, and the second transverse stiffener into the second main beam unit;

[0025] B. Precast secondary beams and floor slabs:

[0026] B1. Weld the first I-beam, the third longitudinal stiffener, the fourth longitudinal stiffener and the third transverse stiffener into a first beam unit, and weld the second I-beam, the fifth longitudinal stiffener, the sixth longitudinal stiffener and the fifth transverse stiffener into a second beam unit.

[0027] B2. The third friction plate is set at the junction of the first beam unit and the second beam unit, and the third friction plate is fixedly connected to the first beam unit and the second beam unit by bolts.

[0028] B3. Use bolts to fix the first type of embedded parts to the upper flange of the first beam unit, and fix the second type of embedded parts to the upper flange of the second beam unit.

[0029] B4. Pass the high-strength steel bars sequentially through the reserved holes in the web of the first type of embedded part, the reserved holes in the pad, and the reserved holes in the web of the second type of embedded part, and tie them together.

[0030] B5. Tie the floor slab reinforcement and set the reserved holes, then pour the concrete. After the concrete reaches the curing requirements, place the second friction plate directly above the junction of the first floor slab unit and the second floor slab unit, and fix the first floor slab unit and the second floor slab unit together with anchor bolts.

[0031] C. Assemble the main beams and frame columns:

[0032] C1. After hoisting the frame column to the design position, the first friction plate is symmetrically arranged on both sides of the web of the first main beam unit and the second main beam unit and fixedly connected by bolts.

[0033] C2. Pass the high-strength tie rod through the first longitudinal stiffening rib of the first main beam unit and the second longitudinal stiffening rib of the second main beam unit in sequence to further fix and connect the first main beam unit and the second main beam unit.

[0034] C3. Install the connecting plate on the lower flange of the first main beam unit and the second main beam unit, and fix the lower flange of the first main beam unit and the second main beam unit together with bolts.

[0035] D. Install secondary beams and floor slabs.

[0036] D1. After hoisting the prefabricated secondary beams and floor slabs from step B directly above the main beam, use bolts to fix the main beam and secondary beams together.

[0037] D2. Pass the bolts through the bolt holes on the upper flange of the main beam and the reserved holes in the floor slab in sequence, and fix them in place.

[0038] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0039] (1) The floor system of the self-resetting frame structure of the present invention has an opening-closing mechanism, which can relax the constraint of the floor on the beam-column joints in the self-resetting frame structure, so that the beam-column joints and the floor can deform in coordination, effectively improving the post-earthquake recoverability of the frame structure.

[0040] (2) The present invention uses high-strength tie rods and high-strength steel bars to replace prestressing tendons, which reduces the design and construction difficulty of prestressing tendon tensioning, anchoring, transportation, etc. The high-strength tie rods and high-strength steel bars work together to increase the self-resetting lever arm at the beam-column joint, avoid the high-strength tie rods and high-strength steel bars from entering the plastic state, provide double protection for the self-resetting performance of the frame structure, and can effectively ensure that the self-resetting ability of the structure does not degrade under long-term load.

[0041] (3) The second friction plate in this invention can not only enable the floor slab to form an opening-closing mechanism corresponding to the beam-column joint, but also play the role of an energy dissipator, transferring structural damage from the frame joint to the secondary beam that is easy to replace;

[0042] (4) All components of the self-resetting frame structure floor system of the present invention can be prefabricated in the factory and are easy to assemble on site. Attached Figure Description

[0043] Figure 1 is a structural schematic diagram of a floor system for a self-resetting frame structure according to the present invention;

[0044] Figure 2 is a structural schematic diagram of the first main beam unit in this invention;

[0045] Figure 3 is a structural schematic diagram of the second main beam unit in this invention;

[0046] Figure 4 is a structural schematic diagram of the first beam unit in this invention;

[0047] Figure 5 is a structural schematic diagram of the second beam unit in this invention;

[0048] Figure 6 is a structural schematic diagram of the first type of embedded part in this invention;

[0049] Figure 7 is a structural schematic diagram of the second type of embedded part in this invention;

[0050] Figure 8 is a structural schematic diagram of the first floor slab unit and the second floor slab unit in this invention;

[0051] Figure 9 is a cross-sectional view of AA in Figure 8;

[0052] Figure 10 is a schematic diagram of the structure of the first friction plate in this invention;

[0053] Figure 11 is a schematic diagram of the structure of the third friction plate in this invention;

[0054] Figure 12 is a prefabrication schematic diagram of the first floor slab unit and the second floor slab unit in this invention;

[0055] Figure 13 is an assembly schematic diagram of a floor system for a self-resetting frame structure according to the present invention. Detailed Implementation

[0056] The technical solution of the present invention will be further described below with reference to the accompanying drawings. Embodiments

[0057] As shown in Figures 1 to 13, a floor system for a self-resetting frame structure according to the present invention includes a main beam 1, a secondary beam 2, a floor slab 3, connecting accessories 4, and a frame column 5. A portion of the main beam 1 is embedded in the frame column 5. The upper part of the main beam 1 is connected to the secondary beam 2 via the connecting accessories 4, and the upper part of the secondary beam 2 is connected to the floor slab 3 via the connecting accessories 4. The main beam 1 includes a first main beam unit 11 and a second main beam unit 12. The secondary beam 2 includes a first beam unit 21 and a second beam unit 22. The floor slab 3 includes a first floor slab unit 31, a second floor slab unit 32, high-strength steel bars 33, ordinary steel bars 34, concrete 35, and embedded parts 36. The connecting accessories 4 include a high-strength tie rod 41, a friction plate 42, a connecting plate 43, and a pad 44. The first main beam unit 11 is embedded in the frame column 5, and the first main beam unit 11 and the second main beam unit 12 are fixedly connected by the high-strength tie rod 41 and the first friction plate 421. Beam unit 21 and second beam unit 22 are arranged in pairs at the position where the first main beam unit 11 and the second main beam unit 12 meet, and are fixedly connected to the main beam 1 after being fixedly connected as a whole by the third friction plate 423; the first floor slab unit 31 and the second floor slab unit 32 are respectively arranged directly above the first beam unit 21 and the second beam unit 22, and the first floor slab unit 31 and the second floor slab unit 32 are connected by high-strength steel bars 33 and the second friction plate 422, and the first floor slab unit 31 and the second floor slab unit 32 are fixedly connected to the secondary beam 2 and the main beam 1 by embedded parts 36.

[0058] As shown in Figure 2-3, the main beam 1 includes a first main beam unit 11 and a second main beam unit 12. Both the first main beam unit 11 and the second main beam unit 12 are integrally welded structures. The first main beam unit 11 includes a first H-shaped steel beam 111, a short beam 112, a first longitudinal stiffener 113, and a first transverse stiffener 114. The first H-shaped steel beam 111 includes an embedded section and an extended section. The embedded section is located inside the frame column 5. The short beam 112 is symmetrically welded to the upper and lower flanges of the embedded section. The first longitudinal stiffener 113 and the first transverse stiffener 114 are welded to the inside of the extended section of the first H-shaped steel beam 111. The second main beam unit 12 includes a second H-shaped steel beam 121, a second longitudinal stiffener 122, and a second transverse stiffener 123. The second longitudinal stiffener 122 and the second transverse stiffener 123 are welded to one end of the second H-shaped steel beam 121. Both the first main beam unit 11 and the second main beam unit 12 are provided with bolt holes. The bolt hole shapes include circular, strip-shaped, and arc-shaped. The second main beam unit 12 is fixed to the outside of the extended section of the first main beam unit 11 via the connecting attachment 4.

[0059] As shown in Figure 4-5, the secondary beam 2 includes a first beam unit 21 and a second beam unit 22. Both the first beam unit 21 and the second beam unit 22 are welded integral structures. The first beam unit 21 includes a first I-beam 211, a third longitudinal stiffener 212, a fourth longitudinal stiffener 213, and a third transverse stiffener 214. The third longitudinal stiffener 212 and the third transverse stiffener 214 are welded to one end of the first I-beam 211. The fourth longitudinal stiffener 213 is arranged at the designed spacing on the first I-beam. The first beam unit 211 has a web plate on one side and is welded into a whole; the second beam unit 22 includes a second I-beam 221, a fifth longitudinal stiffener 222, a sixth longitudinal stiffener 223, and a fifth transverse stiffener 224. The fifth longitudinal stiffener 222 and the fifth transverse stiffener 224 are welded to one end of the second I-beam 221, and the sixth longitudinal stiffener 223 is arranged at the designed spacing on one side of the web plate of the second I-beam 221 and welded into a whole; both the first beam unit 21 and the second beam unit 22 are provided with reserved holes. The first beam unit 21 and the second beam unit 22 are arranged in pairs above the position where the first main beam unit 11 and the second main beam unit 12 meet, and are fixedly connected into a whole by the connecting attachment 4 and then fixedly connected to the main beam 1;

[0060] As shown in Figure 6-9, the floor slab 3 includes a first floor slab unit 31, a second floor slab unit 32, high-strength steel bars 33, ordinary steel bars 34, concrete 35, and embedded parts 36. The embedded parts 36 include first-type embedded parts 361 and second-type embedded parts 362. Both first-type embedded parts 361 and second-type embedded parts 362 are steel structural members with anchor bolts 363 and reserved holes. The first-type embedded parts 361 are located inside the first floor slab unit 31 and are fixedly connected to the upper flange of the first beam unit 21 by bolts. The second-type embedded parts 362 are located inside the second floor slab unit 32 and are fixedly connected to the upper flange of the second beam unit 22 by bolts. The first-type embedded parts 361 and second-type embedded parts 362 are connected at their web positions and are tied together by high-strength steel bars 33 and connecting accessories 4. The first floor slab unit 31 and the second floor slab unit 32 are respectively arranged directly above the first beam unit 21 and the second beam unit 22. The first floor slab unit 31 and the second floor slab unit 32 are connected by high-strength steel bars 33 and connecting accessories 4. The first floor slab unit 31 and the second floor slab unit 32 are fixedly connected to the secondary beam 2 and the main beam 1 by embedded parts 36.

[0061] As shown in Figures 1 and 8-13, the connecting accessory 4 includes a high-strength tie rod 41, a friction plate 42, a connecting plate 43, and a pad 44. The friction plate 42 includes a first friction plate 421, a second friction plate 422, and a third friction plate 423. The high-strength tie rod 41 is located on the outer side of the web at the intersection of the first main beam unit 11 and the second main beam unit 12. The high-strength tie rod 41 passes sequentially through the reserved holes of the first longitudinal stiffening rib 113 and the second longitudinal stiffening rib 122, thus connecting the first main beam unit 11 and the second main beam unit 12. The first friction plate 421 is located at the junction of the first main beam unit 11 and the second main beam unit 12, and is fixedly connected to the first main beam unit 11 and the second main beam unit 12 by bolts; the second friction plate 422 is located at the junction of the first floor slab unit 31 and the second floor slab unit 32, and is fixedly connected to the first floor slab unit 31 and the second floor slab unit 32 by anchor bolts 363; the third friction plate 423 is located at the junction of the first beam unit 21 and the second beam unit 22, and is fixedly connected to the first floor slab unit 31 and the second floor slab unit 32 by bolts. The primary beam unit 21 and the secondary beam unit 22 are fixedly connected; the connecting plate 43 is located at the lower flange of the junction of the first main beam unit 11 and the second main beam unit 12, and the connecting plate 43 is fixedly connected to the lower flange of the first main beam unit 11 and the second main beam unit 12 by bolts; the pad plate 44 is a wedge-shaped steel plate, located at the junction of the first type of embedded part 361 and the second type of embedded part 362; the first friction plate 421, the second friction plate 422, the third friction plate 423, the connecting plate 43, and the pad plate 44 are all provided with reserved holes, the shapes of which include circular, strip, and arc shapes. In addition, the third friction plate 423 is also provided with a reserved groove 4231, which allows the third friction plate 423 to yield and dissipate energy in advance, thus playing the role of an energy dissipator.

[0062] This invention discloses a prefabrication and assembly method for a self-resetting frame structure floor system, comprising the following steps:

[0063] A. Precast main beam 1 and frame column 5:

[0064] A1. As shown in Figure 2, after welding the first H-shaped steel beam 111, the short beam 112, the first longitudinal stiffening rib 113 and the first transverse stiffening rib 114 to form the first main beam unit 11, the first main beam unit 11 is pre-embedded in the frame column 5, and the reinforcing bars are tied and the concrete is poured.

[0065] A2. As shown in Figure 3, the second H-shaped steel beam 121, the second longitudinal stiffener 122 and the transverse stiffener 123 are welded into the second main beam unit 12.

[0066] B. Precast secondary beam 2 and floor slab 3:

[0067] B1. As shown in Figure 4-5, the first I-beam 211, the third longitudinal stiffener 212, the fourth longitudinal stiffener 213 and the third transverse stiffener 214 are welded to form the first beam unit 21, and the second I-beam 221, the fifth longitudinal stiffener 222, the sixth longitudinal stiffener 223 and the fifth transverse stiffener 224 are welded to form the second beam unit 22.

[0068] B2. As shown in Figure 8-9, the third friction plate 423 is set at the junction of the first beam unit 21 and the second beam unit 22, and is fixedly connected to the first beam unit 21 and the second beam unit 22 by bolts.

[0069] B3. As shown in Figure 14, the first type of embedded part 361 is fixedly connected to the upper flange of the first beam unit 21 using bolts, and the second type of embedded part 362 is fixedly connected to the upper flange of the second beam unit 22.

[0070] B4. As shown in Figure 14, the high-strength steel bars 33 are sequentially passed through the reserved holes in the web of the first type of embedded part 361, the reserved holes on the pad 45, and the reserved holes in the web of the second type of embedded part 362, and then tied together.

[0071] B5. As shown in Figure 14, the floor slab reinforcement is tied and reserved holes are set. Then concrete is poured. After the concrete reaches the curing requirements, the second friction plate 422 is set directly above the junction of the first floor slab unit 31 and the second floor slab unit 32, and the first floor slab unit 31 and the second floor slab unit 32 are fixedly connected by anchor bolts 363.

[0072] C. As shown in Figure 15, assemble the main beam 1 and frame column 5:

[0073] C1. After hoisting the frame column 5 to the design position, the first friction plate 421 is symmetrically arranged on both sides of the web of the first main beam unit 11 and the second main beam unit 12, and the first main beam unit 11 and the second main beam unit 12 are fixedly connected by bolts.

[0074] C2. Pass the high-strength tie rod 41 through the first longitudinal stiffening rib 113 of the first main beam unit 11 and the second longitudinal stiffening rib 122 of the second main beam unit 12 in sequence to further fix the first main beam unit 11 and the second main beam unit 12 in a fixed connection.

[0075] C3. Install the connecting plate 43 on the lower flange of the first main beam unit 11 and the second main beam unit 12 and fix it with bolts;

[0076] D. As shown in Figure 15, install secondary beam 2 and floor slab 3:

[0077] D1. After hoisting the prefabricated secondary beam 2 and floor slab 3 from step B directly above the main beam 1, use bolts to fix the main beam 1 and secondary beam 2 together.

[0078] D2. Pass the bolts through the bolt holes on the upper flange of the main beam 1 and the reserved holes in the floor slab 3 in sequence, and fix them in place.

Claims

1. A floor system for a self-resetting frame structure, comprising frame columns (5), characterized in that, It also includes a main beam (1), a secondary beam (2), a floor slab (3), and connecting accessories (4); the main beam (1) includes a first main beam unit (11) and a second main beam unit (12); the secondary beam (2) includes a first beam unit (21) and a second beam unit (22); the floor slab (3) includes a first floor slab unit (31), a second floor slab unit (32), high-strength steel bars (33), and embedded parts (36); the embedded parts (36) include a first type of embedded part (361) and a second type of embedded part (362); the connecting accessories (4) include a high-strength tie rod (41), a friction plate (42), a connecting plate (43), and a pad (44); the friction plate (42) includes a first friction plate (421) and a second friction plate. (422) and the third friction plate (423); the first main beam unit (11) is embedded in the frame column (5), and the first main beam unit (11) and the second main beam unit (12) are fixedly connected by a high-strength tie rod (41) and the first friction plate (421). The first beam unit (21) and the second beam unit (22) are arranged in pairs at the upper part of the position where the first main beam unit (11) and the second main beam unit (12) meet, and are fixedly connected to the first main beam unit (11) and the second main beam unit (12) after being fixedly connected as a whole by the third friction plate (423); the first floor slab unit (31) and the second floor slab unit (32) are respectively arranged on the front of the first beam unit (21) and the second beam unit (22). Above, the first floor slab unit (31) and the second floor slab unit (32) are fixedly connected by high-strength steel bars (33) and a second friction plate (422). The first floor slab unit (31) is fixedly connected to the first beam unit (21) by a first type of embedded part (361), and the second floor slab unit (32) is fixedly connected to the second beam unit (22) by a second type of embedded part (362). The first type of embedded part (361) and the second type of embedded part (362) are both steel components with anchor bolts (363) and reserved holes. The first type of embedded part (361) is located inside the first floor slab unit (31) and is fixedly connected to the upper flange of the first beam unit (21) by bolts. The second type of embedded part (362) is located inside the first floor slab unit (31). Inside the second floor slab unit (32), and fixedly connected to the upper flange of the second beam unit (22) by bolts; the web of the first type of embedded part (361) is connected to the web of the second type of embedded part (362), and is tied together by high-strength steel bars (33) and pads (44); the first friction plate (421) is set at the junction of the first main beam unit (11) and the second main beam unit (12), and is fixedly connected to the first main beam unit (11) and the second main beam unit (12) by bolts; the second friction plate (422) is set at the junction of the first floor slab unit (31) and the second floor slab unit (32), and is fixedly connected to the first floor slab unit (31) and the second floor slab unit (32) by anchor bolts (363);The third friction plate (423) is located at the junction of the first beam unit (21) and the second beam unit (22), and is fixedly connected to the first beam unit (21) and the second beam unit (22) by bolts; the connecting plate (43) is located on the lower flange at the junction of the first main beam unit (11) and the second main beam unit (12), and is fixedly connected to the first main beam unit (11) and the second main beam unit (12) by bolts; the pad plate (44) is a wedge-shaped steel plate, located at the junction of the first type of embedded part (361) and the second type of embedded part (362).

2. The floor system for a self-resetting frame structure according to claim 1, characterized in that, The first main beam unit (11) includes a first H-shaped steel beam (111), which includes an embedded section and an extended section. The embedded section is located inside the frame column (5). Short beams (112) are symmetrically welded to the upper and lower flanges of the embedded section. A first longitudinal stiffening rib (113) and a first transverse stiffening rib (114) are welded inside the extended section. The second main beam unit (12) includes a second H-shaped steel beam (121), which has a second longitudinal stiffening rib (122) and a second transverse stiffening rib (123) welded to one end.

3. The floor system for a self-resetting frame structure according to claim 1, characterized in that, The first main beam unit (11) and the second main beam unit (12) are both welded into an integral structure. Both the first main beam unit (11) and the second main beam unit (12) are provided with bolt holes. The bolt hole shapes include circular, strip-shaped and arc-shaped.

4. The floor system for a self-resetting frame structure according to claim 1, characterized in that, The first beam unit (21) includes a first I-beam (211), one end of which is welded with a third longitudinal stiffener (212) and a third transverse stiffener (214), and a plurality of fourth longitudinal stiffeners (213) are welded to one side of the web of the first I-beam (211) at a design interval; the second beam unit (22) includes a second I-beam (221), one end of which is welded with a fifth longitudinal stiffener (222) and a fifth transverse stiffener (224), and a plurality of sixth longitudinal stiffeners (223) are welded to one side of the web of the second I-beam (221) at a design interval.

5. The floor system for a self-resetting frame structure according to claim 1, characterized in that, The first beam unit (21) and the second beam unit (22) are both welded into an integral structure, and both the first beam unit (21) and the second beam unit (22) are provided with reserved holes.

6. The floor system for a self-resetting frame structure according to claim 1, characterized in that, The first friction plate (421), the second friction plate (422), the third friction plate (423), the connecting plate (43), and the pad (44) are all provided with reserved holes, and the reserved holes are circular, strip-shaped, and arc-shaped.

7. The prefabrication and assembly method for a floor system for a self-resetting frame structure as described in any one of claims 1-6, characterized in that, Includes the following steps: A. Precast main beams (1) and frame columns (5): A1. After welding the first H-beam (111), short beam (112), first longitudinal stiffener (113) and first transverse stiffener (114) to form the first main beam unit (11), the first main beam unit (11) is embedded in the frame column (5), and the reinforcing bars are tied and concrete is poured; A2. The second H-beam (121), second longitudinal stiffener (122) and second transverse stiffener (123) are welded to form the second main beam unit (12); B. Precast secondary beams (2) and floor slabs (3): B1. The first H-beam (211), third longitudinal stiffener (212), fourth longitudinal stiffener (213) and third Transverse stiffeners (214) are welded to form the first beam unit (21), and the second I-beam (221), the fifth longitudinal stiffener (222), the sixth longitudinal stiffener (223), and the fifth transverse stiffener (224) are welded to form the second beam unit (22); B2, the third friction plate (423) is set at the junction of the first beam unit (21) and the second beam unit (22), and the third friction plate (423) is fixedly connected to the first beam unit (21) and the second beam unit (22) by bolts; B3, the first type of embedded part (361) is fixedly connected to the upper flange of the first beam unit (21) by bolts, and the second type of embedded part (362) is fixedly connected to the upper flange of the first beam unit (21). B4. The upper flange of the secondary beam unit (22) is fixedly connected; B5. The high-strength steel bars (33) are passed through the reserved holes of the first type of embedded part (361) in the web, the reserved holes on the pad plate (44), and the reserved holes of the second type of embedded part (362) in the web in sequence, and tied together; B6. The floor slab steel bars are tied and reserved holes are set, and then concrete is poured. After the concrete reaches the curing requirements, the second friction plate (422) is set directly above the junction of the first floor slab unit (31) and the second floor slab unit (32), and the first floor slab unit (31) and the second floor slab unit (32) are fixedly connected by anchor bolts (363); C. Assemble the main beam (1) and the frame column (5): C1. Assemble the frame column ( 5) After hoisting to the design position, the first friction plate (421) is symmetrically arranged on both sides of the web of the first main beam unit (11) and the second main beam unit (12) and fixedly connected by bolts; C2) The high-strength tie rod (41) is passed through the first longitudinal stiffening rib (113) of the first main beam unit (11) and the second longitudinal stiffening rib (122) of the second main beam unit (12) in sequence to further fix the first main beam unit (11) and the second main beam unit (12); C3) The connecting plate (43) is installed on the lower flange of the first main beam unit (11) and the second main beam unit (12), and the lower flange of the first main beam unit (11) and the second main beam unit (12) is fixedly connected by bolts;D. Install the secondary beam (2) and floor slab (3): D1. After hoisting the prefabricated secondary beam (2) and floor slab (3) from step B directly above the main beam (1), use bolts to fix the main beam (1) and secondary beam (2) together; D2. Pass the bolts through the bolt holes on the upper flange of the main beam (1) and the reserved holes in the floor slab (3) in sequence, and fix them together.

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