Ramp self-resetting controllable friction energy dissipation stair structure and construction method thereof

Abstract

The application provides a stair structure with self-resetting controllable friction energy dissipation and a construction method thereof, which comprises a prefabricated rest platform beam plate, the prefabricated rest platform beam plate comprises rest platform beams and rest platform folded plates, a prefabricated stair section is arranged between two rest platform beams, and a self-resetting friction assembly is arranged at the connection position of the prefabricated stair section and the rest platform beam; the self-resetting friction assembly comprises horizontally arranged horizontal friction buffer blocks and self-resetting friction supports, and the self-resetting friction support is composed of an upper inclined friction block, a lower inclined friction block and a pressure spring sliding support which are sequentially penetrated by a connecting screw rod. The self-resetting of the inclined surface and the dead weight after the sliding of the stair section is adopted, and the vibration energy is dissipated by the friction surface, so that the anti-seismic performance of the stair and the building is effectively improved, and the anti-seismic performance, reliability, economy, durability and adaptability are better than those of other schemes.

Description

Technical Field

[0001] This invention belongs to the field of industrialized concrete structure engineering, specifically relating to a self-resetting inclined staircase structure with controllable frictional energy dissipation and its construction method. Background Technology

[0002] Staircases are essential components of buildings, serving as vertical transportation between floors and playing an irreplaceable role in daily life. They are also crucial escape routes in the event of fires and earthquakes. Compared to traditional cast-in-place monolithic staircases, although the end structures of conventional prefabricated staircases have released some of the constraint of the stair beams on the stair slabs, the diagonal support formed by the stair slabs in the stairwell is still significant. These supports are easily damaged first during earthquakes, hindering evacuation and escape. my country is located between the Circum-Pacific Seismic Belt and the Eurasian Seismic Belt, experiencing widespread, high-intensity, and frequent seismic activity. Approximately one-quarter to one-third of the world's major continental earthquakes occur in my country. Therefore, improving the seismic performance of staircases is crucial to ensuring the unobstructed flow of life-saving passageways.

[0003] In the prior art, such as patent 201710476739.3, a new type of prefabricated staircase seismic isolation bearing is disclosed, including a connecting plate, a bearing body and a rubber protective layer wrapped around the outer periphery of the bearing body. Without the use of a sealing plate, the rubber protective layer wrapped around the outer periphery of the bearing body eliminates the diagonal bracing effect of the stair slab, preventing the staircase from failing before the main structure, greatly improving the seismic performance of the prefabricated staircase. It has the advantages of excellent mechanical properties, low cost, and environmental protection, and the assembly method is simple and the construction cost is low. However, it has the following disadvantages: (1) The manufacturing process of the laminated rubber bearing is complicated and its manufacturing cost is high; (2) The anti-aging performance of the rubber material used in the seismic isolation bearing is limited and replacement is difficult; (3) No effective centralized energy dissipation components are set, and the seismic energy dissipation efficiency is low; (4) Point bearings are prone to stress concentration leading to local damage, and without dislocation measures, beam collapse may occur.

[0004] Patent 201920892942.3 discloses a shock-absorbing device for prefabricated stairs. The fixed base is connected to the stair platform by bolts through pre-drilled bolt holes. A hemispherical recess is arranged in the center of the fixed base, and its shape matches the hemispherical protrusion at the top. Spring support plates are arranged on both sides at the center of the height of the hemispherical recess to support the springs. The base and the top are also connected to the movable top through a connecting rod slider, so as to dissipate energy during an earthquake, maximize the integrity of the staircase, and increase the chance of escape. However, it also has the following disadvantages: (1) It has high requirements for the springs that directly bear the self-weight and load of the concrete stairs and does not have concentrated energy dissipation components; (2) Under the action of an earthquake, the stairs will generate vertical displacement when they vibrate laterally, and there is no effective treatment measure. Summary of the Invention

[0005] The technical problem this invention aims to solve is to provide a self-resetting, controllable frictional energy-dissipating staircase structure with inclined planes and its construction method. This aligns with current trends in industrialized building development, featuring a simple structure, well-organized components, clearly defined energy dissipation, reliable performance, and easy maintenance and disassembly. It innovatively introduces a self-resetting gravity structure with inclined planes and a frictional energy-dissipating mechanism into the staircase. This not only effectively solves the problem of staircase self-resetting during earthquakes, ensuring emergency access, but also dissipates seismic input energy through the frictional energy dissipation mechanism, reducing staircase vibration amplitude and improving the overall seismic performance of the staircase and even the building. Furthermore, it boasts a simple structure, low production cost, and reliable performance. In its manufacturing and construction method, the overall steel component manufacturing, concrete pouring, and curing are all completed in the factory. There are no construction supports or wet work on the installation site, and only bolt tightening is required. This offers advantages such as controllable quality, controllable cost, high construction efficiency, and a short construction period.

[0006] To solve the above-mentioned technical problems, embodiments of the present invention provide a staircase structure with controllable frictional energy dissipation and self-resetting inclined surface, including a prefabricated rest platform beam slab, wherein the prefabricated rest platform beam slab includes a rest platform beam and a rest platform folded plate, a prefabricated stair section is provided between the two rest platform beams, and an inclined surface self-resetting friction component is provided at the connection between the prefabricated stair section and the rest platform beam;

[0007] The inclined self-resetting friction assembly includes a horizontally arranged friction buffer block and an inclined self-resetting friction support. The inclined self-resetting friction support is located inside the precast rest platform beam. The inclined self-resetting friction support consists of an upper inclined friction block, a lower inclined friction block, and a pressure spring sliding support through which the connecting screw passes in sequence. The lower side of the upper inclined friction block and the upper side of the lower inclined friction block are provided with friction surfaces, so that the two friction surfaces clamp the upper inclined friction block and the lower inclined friction block.

[0008] The pressure spring sliding support includes a sliding plate, a sliding box, and a pressure spring connected in series from top to bottom on the connecting screw. The pressure spring surrounds the bottom of the connecting screw. The sliding box has a lubrication cavity inside, and rolling shafts are provided on both sides of the lubrication cavity. The sliding plate is mounted on top of the sliding box.

[0009] The prefabricated rest platform beam has a horizontal friction buffer surface and an inclined self-resetting friction mounting cavity. The horizontal friction buffer block is installed on the horizontal friction buffer surface, and the upper and lower inclined friction blocks are installed in the inclined self-resetting friction mounting cavity and can slide relative to the inclined self-resetting friction mounting cavity.

[0010] The inclined self-resetting friction mounting cavity has a pressure spring sliding support mounting cavity on its inner bottom side, and the pressure spring sliding support is installed in the pressure spring sliding support mounting cavity.

[0011] The lower inclined friction block has an elongated bolt hole perpendicular to it, and the connecting screw slides within the elongated bolt hole.

[0012] The upper and lower inclined friction blocks are inclined in the direction of the horizontal friction buffer surface.

[0013] The bottom end of the pressure spring sliding support is provided with a limiting plate, which is connected to the pressure spring.

[0014] The precast stair section and the precast rest platform beam are provided with connecting bolt holes, and the top of the inclined self-resetting friction support is provided with inclined self-resetting friction support hole positions, which correspond one-to-one with the connecting bolt holes.

[0015] Embodiments of the present invention also provide a construction method for a self-resetting, controllable frictional energy dissipation staircase structure, comprising the following steps:

[0016] S1. Hoist and fix the prefabricated rest platform beams and slabs onto the main structure;

[0017] S2. Level the inclined surface self-resetting friction mounting cavity and fix the lower inclined surface friction block to make the friction surface of the inclined surface and the horizontal friction buffer surface smoothly transition.

[0018] S3. Position and fix the upper inclined friction block on top of the lower inclined friction block to form a pair of sliding friction surfaces, and level the upper inclined friction block in preparation for connection with the prefabricated ladder section;

[0019] S4. Hoist the prefabricated ladder section and accurately align the connecting bolt holes with the holes of the inclined self-resetting friction support;

[0020] S5. Connecting bolts through holes to connect precast stair sections, inclined self-resetting friction supports and precast rest platform beams and slabs;

[0021] S6. Insert the connecting screw into the upward-facing opening of the sliding box, and after placing the rolling shafts on both sides inside the sliding box, inject the lubricant into the lubrication chamber.

[0022] S7. In the installation cavity of the pressure spring sliding support of the precast rest platform beam, insert the sliding plate, sliding box, pressure spring and limit plate into the connecting screw in sequence, and then tighten the lower fastening nut.

[0023] S8. Cover the sliding gap between the precast stair section and the precast rest platform beam with a cover plate or fill it with flexible material to ensure sufficient sliding displacement.

[0024] The beneficial effects of the above technical solution of the present invention are as follows:

[0025] This invention uses a self-resetting friction component on an inclined plane to achieve self-resetting of the stair section after sliding, and combines the friction surface to dissipate vibration energy, effectively improving the seismic performance of stairs and buildings. The pressure spring support inside the self-resetting friction component has a simple structure, low production cost and reliable performance. It can not only adjust the friction force and provide self-resetting restoring force, but also provide horizontal and vertical displacement. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a self-resetting, controllable frictional energy dissipation staircase structure based on the present invention.

[0027] Figure 2 This is a schematic diagram of the prefabricated ladder segment in this invention;

[0028] Figure 3 This is a schematic diagram of the prefabricated rest platform beams and slabs in this invention. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the prefabricated rest platform beams and slabs in this invention. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the inclined self-resetting friction assembly in this invention;

[0031] Figure 6 This is a schematic diagram of the structure of the pressure spring sliding support in this invention;

[0032] Figure 7 This is an assembly diagram of a self-resetting, controllable frictional energy dissipation staircase structure based on the present invention.

[0033] Figure 8 This is a schematic diagram of the internal steel reinforcement arrangement of the prefabricated stair section in this invention;

[0034] Figure 9 This is a schematic diagram of the internal steel reinforcement arrangement of the inclined self-resetting friction component in this invention;

[0035] Figure 10 This is a schematic diagram of the internal reinforcement arrangement of the prefabricated rest platform beams and slabs in this invention;

[0036] Figure 11 This is a schematic diagram of the construction method for the inclined self-resetting controllable friction energy dissipation staircase structure of the present invention.

[0037] Figure 12 This is a schematic diagram of the manufacturing process of the inclined plane self-resetting controllable friction energy dissipation staircase structure of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Precast stair section; 2. Inclined self-resetting friction assembly; 3. Precast rest platform beam; 4. Connecting bolt holes; 5. Precast stair section embedded lifting nuts; 6. Railing anchor; 7. Rest platform beam; 8. Rest platform folded plate; 9. Horizontal friction buffer block; 10. Inclined self-resetting friction block mounting cavity; 11. Long oval bolt hole; 12. Precast rest platform beam embedded lifting nuts; 13. Pressure spring sliding support mounting cavity; 14. Connecting screw; 15. Upper fastening nut; 16. Upper inclined friction block; 17. Lower inclined surface 18. Friction block; 19. Friction surface; 20. Long oval limiting hole; 21. Pressure spring sliding support; 22. Sliding plate; 23. Sliding box; 24. Pressure spring; 25. Limiting plate; 26. Lower fastening nut; 27. Rolling shaft; 28. Lubrication cavity; 29. ​​Plate surface longitudinal reinforcement; 30. Distribution reinforcement; 31. Plate bottom longitudinal reinforcement; 32. Longitudinal reinforcement; 33. Friction surface anchoring reinforcement; 34. Stirrup; 35. Friction surface anchoring reinforcement; 36. Beam stirrup; 37. Beam longitudinal reinforcement; 38. Plate longitudinal reinforcement; 39. Plate transverse reinforcement. Detailed Implementation

[0040] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0041] like Figures 1-6 As shown, an embodiment of the present invention provides a staircase structure with a self-resetting inclined plane and controllable frictional energy dissipation, including a prefabricated rest platform beam 3. The prefabricated rest platform beam 3 includes a rest platform beam and a rest platform folded plate 8. A prefabricated stair section 1 is provided between the two rest platform beams 3. An inclined plane self-resetting friction component 2 is provided at the connection between the prefabricated stair section 1 and the rest platform beam 3.

[0042] The inclined self-resetting friction assembly 2 includes a horizontally arranged friction buffer block 9 and an inclined self-resetting friction support. The inclined self-resetting friction support is located inside the precast rest platform beam slab 3. The inclined self-resetting friction support is composed of an upper inclined friction block 16, a lower inclined friction block 17 and a pressure spring sliding support 20, through which the connecting screw 14 passes in sequence. They are fixedly connected by an upper fastening nut 15 and a lower fastening nut 25. The lower side of the upper inclined friction block 16 and the upper side of the lower inclined friction block 17 are provided with friction surfaces 18, so that the two friction surfaces 18 clamp the upper inclined friction block 16 and the lower inclined friction block 17.

[0043] The pressure spring sliding support 20 includes a sliding plate 21, a sliding box 22, and a pressure spring 23 connected in series from top to bottom on the connecting screw 14. The pressure spring 23 surrounds the bottom of the connecting screw 14. The sliding box 22 has an upward-opening lubrication cavity 27 inside. Rolling shafts 26 are provided on both sides of the lubrication cavity 27. Injecting lubricant will effectively reduce the frictional resistance of the rolling shafts 26, realizing the horizontal sliding of the support. The sliding plate 21 is mounted above the sliding box 22. A limiting plate 24 is provided at the bottom of the pressure spring sliding support 20, and the limiting plate 24 is connected to the pressure spring 23. The pressure spring sliding support 20 provides horizontal and vertical sliding displacement for the prefabricated ladder section 1. Tightening the lower fastening nut 25 can adjust the spring pressure value, thereby controlling the frictional force and self-resetting restoring force of the support.

[0044] The prefabricated rest platform beam 3 has a horizontal friction buffer surface and an inclined self-resetting friction mounting cavity 10. The horizontal friction buffer block 9 is installed on the horizontal friction buffer surface. The upper inclined friction block 16 and the lower inclined friction block 17 are installed in the inclined self-resetting friction mounting cavity 10 and can slide relative to the inclined self-resetting friction mounting cavity 10. The inclined direction of the upper inclined friction block 16 and the lower inclined friction block 17 is inclined towards the horizontal friction buffer block 9. The inclination angle can be determined according to the force calculation to realize the self-resetting of the stairs under its own weight.

[0045] The inclined self-resetting friction mounting cavity 10 has a pressure spring sliding support mounting cavity 13 on its inner bottom side, and the pressure spring sliding support 20 is installed in the pressure spring sliding support mounting cavity 13.

[0046] The lower inclined friction block 17 has an elongated bolt hole 19 perpendicular to it, and the inclined self-resetting friction mounting cavity 10 has an elongated limiting hole 11. The connecting screw 14 slides in the elongated bolt hole 19 and the elongated limiting hole 11, and works with the upper inclined friction block 16, the lower inclined friction block 17 and the pressure spring sliding support 20 to control the friction force and self-resetting restoring force of the prefabricated ladder section.

[0047] The prefabricated stair section 1 also includes a prefabricated stair section pre-embedded hoisting nut 5 for matching hoisting requirements, and a railing anchor 6 set on one side of the prefabricated stair section 1 for prefabricating and installing railings.

[0048] The prefabricated rest platform beam is also equipped with pre-embedded hoisting nuts to match hoisting requirements.

[0049] In this embodiment, the inclined self-resetting friction support 2 constitutes the core of the invention. The inclination angles of the upper and lower inclined friction blocks should be determined based on force calculations, mainly to achieve the self-resetting of the stair section under its own weight. The friction surface 18, as a concentrated energy-dissipating component, is designed according to the seismic performance requirements, combined with the friction coefficient of the surface material and the geometry of the friction surface, and works in conjunction with the pressure spring sliding support 20 to improve and optimize the seismic performance of the staircase. For example, Figure 7 As shown, the positional relationships and assembly methods of the components of a self-resetting, controllable friction energy-dissipating industrial concrete staircase with inclined plane are presented.

[0050] In addition, this embodiment also provides the internal steel reinforcement arrangement of the staircase structure, such as... Figure 8 The precast stair section shown includes the internal reinforcement arrangement, including longitudinal bars 28 at the top of the slab, distribution bars 29, and longitudinal bars 30 at the bottom of the slab. Figure 9 The internal reinforcement arrangement of the upper and lower inclined friction blocks shown includes longitudinal reinforcement 31, friction surface anchoring reinforcement 32, and stirrups 33. Figure 10 The arrangement of internal reinforcement bars in the precast rest platform beam slab 3 is shown, including friction surface anchorage reinforcement bars 34, beam stirrups 35, beam longitudinal reinforcement bars 36, slab longitudinal reinforcement bars 37, and slab transverse reinforcement bars 38.

[0051] like Figure 11 As shown, this embodiment also provides a construction method for a self-resetting, controllable frictional energy dissipation staircase structure, including the following steps:

[0052] S1. Hoist and fix the prefabricated rest platform beams and slabs onto the main structure;

[0053] S2. Level the inclined surface self-resetting friction mounting cavity and fix the lower inclined surface friction block to make the friction surface of the inclined surface and the horizontal friction buffer surface smoothly transition.

[0054] S3. Position and fix the upper inclined friction block on top of the lower inclined friction block to form a pair of sliding friction surfaces, and level the upper inclined friction block in preparation for connection with the prefabricated ladder section;

[0055] S4. Hoist the prefabricated ladder section and accurately align the connecting bolt holes with the holes of the inclined self-resetting friction support;

[0056] S5. Connecting bolts through holes to connect precast stair sections, inclined self-resetting friction supports and precast rest platform beams and slabs;

[0057] S6. Insert the connecting screw into the upward-facing opening of the sliding box, and after placing the rolling shafts on both sides inside the sliding box, inject the lubricant into the lubrication chamber.

[0058] S7. In the installation cavity of the pressure spring sliding support of the precast rest platform beam, insert the sliding plate, sliding box, pressure spring and limit plate into the connecting screw in sequence, and then tighten the lower fastening nut.

[0059] S8. Cover the sliding gap between the precast stair section and the precast rest platform beam with a cover plate or fill it with flexible material to ensure sufficient sliding displacement.

[0060] Combination Figure 12 As shown, the manufacturing and installation process of the inclined plane self-resetting controllable friction energy dissipation staircase structure of the present invention is described in detail below:

[0061] (1) Inclined self-resetting friction support:

[0062] (1-1) Cut the steel plate according to the design requirements, mainly including: a pair of friction surfaces, sliding plate, sliding box plate, and limiting plate;

[0063] (1-2) According to the design requirements, openings are made in the steel plate, mainly including: elongated holes in the lower friction surface and sliding plate, and round holes in the upper friction surface, sliding box bottom plate and limiting plate;

[0064] (1-3) Welded steel plates are shown in the assembly sliding box;

[0065] (1-4) Cut and bend the anchor steel bars into shape, and weld them to a pair of friction surfaces;

[0066] (1-5) Cutting and forming of longitudinal steel bars and stirrups for inclined friction blocks, and binding of steel cages for upper and lower inclined friction blocks;

[0067] (1-6) A pair of inclined friction surfaces are pre-embedded, and the pair of friction surfaces are precisely positioned by welding;

[0068] (1-7) When installing the inclined friction block template, the friction surface should be in close contact with the bottom mold;

[0069] (1-8) After applying the release agent, pour the inclined friction block concrete. High-strength concrete should be used.

[0070] (1-9) When the concrete reaches a certain strength, remove the side formwork of the friction block without chipping or breaking the edges when removing the formwork;

[0071] (1-10) High-temperature autoclaving is applied to the upper and lower friction blocks. The bottom formwork is removed after the concrete reaches the design strength.

[0072] (1-11) A polymer friction surface layer is installed on a pair of inclined friction surfaces to improve the energy dissipation capacity of the support;

[0073] (1-12) Inspect all components of the inclined plane self-resetting friction support and transport them to the construction site after they pass the inspection.

[0074] (2) Precast rest platform beams and slabs:

[0075] (2-1) After cutting and bending the steel bars, tie the steel cage of the precast rest platform beam and slab, including longitudinal bars and stirrups;

[0076] (2-2) To form a lower inclined friction block mounting cavity in the rest platform beam, a similar occupant is placed;

[0077] (2-3) To form elongated bolt holes in the rest platform beam, a similarly shaped spacer is inserted;

[0078] (2-4) To form a pressure spring sliding support mounting cavity in the rest platform beam, a similarly shaped body is inserted;

[0079] (2-5) A horizontal friction buffer surface is pre-embedded, and precise positioning control is achieved by welding.

[0080] (2-6) Pre-embed hoisting nuts to precisely control the position and angle of the nuts;

[0081] (2-7) After assembling the formwork of the precast rest platform beams and slabs and applying the release agent;

[0082] (2-8) Pour concrete for the precast rest platform beams and slabs;

[0083] (2-9) When the concrete reaches a certain strength, remove the side formwork without chipping or breaking off any edges or corners during demolding;

[0084] (2-10) High-temperature autoclaving is carried out on the precast rest platform beams and slabs. The bottom formwork is removed after the concrete reaches the design strength.

[0085] (2-11) Remove the occupies of the same shape in the precast rest platform beams and slabs to form corresponding installation cavities;

[0086] (2-12) Inspect the precast rest platform beams and slabs, and transport them to the construction site after they pass the inspection.

[0087] (3) Precast ladder sections

[0088] (3-1) Cut the steel bars, bend and shape them and tie them into a precast precast rest platform steel cage, including longitudinal bars and stirrups;

[0089] (3-2) Pre-drill holes for connecting bolts in the precast stair sections for connection with the precast rest platform beams and slabs;

[0090] (3-3) Reserve hoisting nuts in the precast ladder sections for hoisting construction;

[0091] (3-4) Reserve railing anchors in the prefabricated stair sections for railing installation;

[0092] (3-5) Assemble the formwork for the precast stair sections and apply release agent;

[0093] (3-6) Pouring precast stepped concrete;

[0094] (3-7) When the concrete reaches a certain strength, remove the side formwork without chipping or breaking off any edges or corners during demolding;

[0095] (3-8) High-temperature autoclaving is performed on the precast steps, and the bottom formwork is removed after the concrete reaches the design strength;

[0096] (3-9) Inspect the prefabricated ladder sections and transport them to the construction site after they pass the inspection.

[0097] This invention discloses a sloped, self-resetting, controllable frictional energy-dissipating staircase structure, which aligns with the trend of industrialized building development. It features a simple structure, well-organized components, clearly defined energy dissipation, reliable performance, and easy maintenance and disassembly. Steel component manufacturing, concrete pouring, and curing are all completed in the factory, eliminating on-site construction support and wet work, requiring only bolt tightening. Therefore, quality is controllable, costs are controllable, construction efficiency is high, and the construction period is short. This industrialized staircase innovatively utilizes a slope and its own weight to achieve self-resetting after the stair section slides, combined with friction surfaces to dissipate vibration energy, effectively improving the seismic performance of the staircase and the building. The proposed pressure spring support has a simple structure, low production cost, and reliable performance. It not only adjusts friction and provides self-resetting restoring force but also provides horizontal and vertical displacement. This invention provides a complete technical solution, including: specific implementation methods for the sloped, self-resetting, controllable frictional energy-dissipating industrialized staircase and specific implementation processes for node fabrication and installation.

[0098] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A self-resetting, controllable frictional energy dissipation staircase structure with inclined plane, characterized in that, The system includes prefabricated rest platform beams and slabs, each comprising a rest platform beam and a rest platform folded plate. A prefabricated stair section is provided between the two rest platform beams, and a sloped self-resetting friction assembly is provided at the connection between the prefabricated stair section and the rest platform beam. The inclined self-resetting friction assembly includes a horizontally arranged friction buffer block and an inclined self-resetting friction support. The inclined self-resetting friction support is located inside the precast rest platform beam. The inclined self-resetting friction support consists of an upper inclined friction block, a lower inclined friction block, and a pressure spring sliding support through which the connecting screw passes in sequence. The lower side of the upper inclined friction block and the upper side of the lower inclined friction block are provided with friction surfaces, and the two friction surfaces make the upper and lower inclined friction blocks clamp each other. The pressure spring sliding support includes a sliding plate, a sliding box, and a pressure spring connected in series from top to bottom on the connecting screw. The pressure spring surrounds the bottom of the connecting screw. The sliding box has a lubrication cavity inside, and rolling shafts are provided on both sides of the lubrication cavity. The sliding plate is mounted on top of the sliding box.

2. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 1, characterized in that, The prefabricated rest platform beam has a horizontal friction buffer surface and an inclined self-resetting friction mounting cavity. The horizontal friction buffer block is installed on the horizontal friction buffer surface, and the upper and lower inclined friction blocks are installed in the inclined self-resetting friction mounting cavity and can slide relative to the inclined self-resetting friction mounting cavity.

3. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 2, characterized in that, The inclined self-resetting friction mounting cavity has a pressure spring sliding support mounting cavity on its inner bottom side, and the pressure spring sliding support is installed in the pressure spring sliding support mounting cavity.

4. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 1, characterized in that, The lower inclined friction block has an elongated bolt hole perpendicular to it, and the connecting screw slides within the elongated bolt hole.

5. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 1, characterized in that, The upper and lower inclined friction blocks are inclined in the direction of the horizontal friction buffer surface.

6. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 1, characterized in that, The bottom end of the pressure spring sliding support is provided with a limiting plate, which is connected to the pressure spring.

7. The inclined plane self-resetting controllable friction energy dissipation staircase structure according to claim 1, characterized in that, The precast stair section and the precast rest platform beam are connected by connecting bolt holes. The top of the inclined self-resetting friction support is provided with inclined self-resetting friction support hole positions, and the inclined self-resetting friction support holes correspond one-to-one with the connecting bolt holes.

8. A construction method for a self-resetting, controllable frictional energy dissipation staircase structure, characterized in that, Includes the following steps: S1. Hoist and fix the prefabricated rest platform beams and slabs onto the main structure; S2. Level the inclined surface self-resetting friction mounting cavity and fix the lower inclined surface friction block to make the friction surface of the inclined surface and the horizontal friction buffer surface smoothly transition. S3. Position and fix the upper inclined friction block on top of the lower inclined friction block to form a pair of sliding friction surfaces, and level the upper inclined friction block in preparation for connection with the prefabricated ladder section; S4. Hoist the prefabricated ladder section and accurately align the connecting bolt holes with the holes of the inclined self-resetting friction support; S5. Connecting bolts through holes to connect precast stair sections, inclined self-resetting friction supports and precast rest platform beams and slabs; S6. Insert the connecting screw into the upward-facing opening of the sliding box, and after placing the rolling shafts on both sides inside the sliding box, inject the lubricant into the lubrication chamber. S7. In the installation cavity of the pressure spring sliding support of the precast rest platform beam, insert the sliding plate, sliding box, pressure spring and limit plate into the connecting screw in sequence, and then tighten the lower fastening nut. S8. Cover the sliding gap between the precast stair section and the precast rest platform beam with a cover plate or fill it with flexible material to ensure sliding displacement.

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