Assembly type shock insulation stair substructure in multi-layer frame structure

Abstract

The invention discloses an assembly type shock insulation stair substructure in a multi-layer frame structure, which is formed by integrally connecting a plurality of upper and lower layers of staircases in the multi-layer frame structure, the bottom of the assembly type shock insulation stair substructure is supported in a frame beam of a top plate of the multi-layer frame main body structure through a shock insulation support, and a shock insulation seam is formed between the vertical face of the assembly type shock insulation stair substructure and the peripheral main body structure. Vertical isolation seams are formed between the top and the bottom of the assembly type shock insulation stair substructure and the main body structure correspondingly. A plurality of layers of staircases in a frame structure are independent from a main body structure, necessary through staircase columns are added to form an independent staircase sub-structure, a seismic isolation support is introduced to a bottom layer or a basement top plate, and the rigidity of a staircase frame sub-structure is increased by fully utilizing the supporting effect of a staircase inclined staircase plate and the rigidity effect of a filling wall; the earthquake isolation effect of the stair substructure is enhanced, the earthquake force of the earthquake isolation stair is reduced, and stair damage is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of seismic isolation building engineering, and in particular to an assembled seismic isolation staircase substructure in a multi-story frame structure. Background Art

[0002] In previous earthquakes, traditional multi-story frame structures such as school buildings have suffered serious damage to the staircase structure and surrounding infill walls due to the support effect of the stair slab, the stiffness effect of the infill wall, and the constraint effect, especially in the middle and low areas. In order to improve the seismic performance of traditional stairwells, sliding stairs or shock-absorbing stairs are also used. Since the sliding stairwell structure and the energy dissipation and shock-absorbing stairwell are separated at the connection between the inclined stair slab and the platform, they are adjusted at the level of the inclined stair segment components. Although the seismic performance of traditional stairwells has been improved to a certain extent, there are still problems such as the large number of sliding layers and energy dissipation layers of the inclined stair slab and the difficulty of construction. For this reason, stairs in multi-story frame structures can adopt independent seismic isolation substructures. Summary of the invention

[0003] The purpose of the present invention is to provide an assembled seismic isolation staircase substructure in a multi-story frame structure to address the problem that in a traditional multi-story frame structure, the staircase structure in the middle and low areas and the surrounding filling walls are severely damaged due to the supporting effect of the staircase inclined treads, the stiffness effect and the restraint effect of the filling walls during an earthquake. The staircase substructure is independent of the main frame structure, thereby reducing seismic force and reducing stair damage, making it a "safety island".

[0004] The present invention is achieved through the following technical solutions:

[0005] The present invention provides an assembled seismic isolation staircase substructure in a multi-story frame structure, wherein the assembled seismic isolation staircase substructure is composed of upper and lower multi-story staircases in the multi-story frame structure connected into a whole, the bottom of the assembled seismic isolation staircase substructure is supported in the frame beam of the top plate of the multi-story frame main structure through a seismic isolation bearing, a seismic isolation joint is arranged between the facade of the assembled seismic isolation staircase substructure and the surrounding main structure, and vertical isolation joints are respectively arranged between the top and bottom of the assembled seismic isolation staircase substructure and the main structure.

[0006] In the above technical scheme, several stairwells in the multi-story frame structure are separated from the main structure, necessary through stair columns are added to form an independent stair substructure, and seismic isolation bearings are introduced on the ground floor or the top plate of the basement. The supporting effect of the inclined stair slab and the stiffness effect of the infill wall are fully utilized to increase the stiffness of the stair frame substructure, thereby enhancing the seismic isolation effect of the stair substructure, reducing the seismic force of the seismic isolation stairs, greatly reducing the damage to the stairs, making the stairs a "safety island", and turning the disadvantages of the supporting effect of the inclined stair slab and the stiffness effect of the infill wall in the traditional structure into advantages.

[0007] As a preferred embodiment of the present invention, the prefabricated seismic isolation staircase substructure includes prefabricated stair columns, prefabricated stair beams, prefabricated inclined stair treads and stair platforms, the prefabricated stair columns are vertically distributed at the supporting corner points of each stair platform, the prefabricated stair beams are connected to the bottom and top of adjacent prefabricated stair columns, and the prefabricated inclined stair treads are connected between two stair platforms.

[0008] As a preferred solution of the present invention, the seismic isolation bearing is connected between the lower part of the prefabricated ladder column located at the lowest layer and the main support beam.

[0009] As a preferred embodiment of the present invention, after the prefabricated stair columns, prefabricated stair beams, and prefabricated inclined stair slabs in the assembled seismic isolation stair substructure are assembled in place, concrete is poured at the connection positions of the prefabricated parts.

[0010] As a preferred embodiment of the present invention, the assembled seismic isolation staircase substructure is composed of 2 to 3 stairwells at the bottom of the multi-story frame structure.

[0011] As a preferred embodiment of the present invention, the assembled seismic isolation staircase substructure is a prefabricated concrete structure or a prefabricated steel structure.

[0012] As a preferred embodiment of the present invention, the assembled seismic isolation staircase substructure is an on-site assembled structure or a prefabricated integral assembled structure.

[0013] As a preferred solution of the present invention, a viscous damper is provided on the lower layer or the upper layer of the assembled seismic isolation staircase substructure, and the viscous damper connects the assembled seismic isolation staircase substructure to the main frame.

[0014] As a preferred solution of the present invention, the viscous dampers are arranged at the four corners of the bottom of the assembled seismic isolation staircase substructure.

[0015] As a preferred solution of the present invention, one end of the viscous damper is connected to the prefabricated ladder column or the seismic isolation ladder beam, and the other end is connected to the main frame column or the main support beam.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The present invention separates several stairwells in a multi-story frame structure from the main structure, adds necessary through stair columns to form an independent frame substructure, and introduces seismic isolation bearings on the ground floor or the top plate of the basement, making full use of the supporting effect of the inclined stair treads and the stiffness effect of the filling wall to increase the stiffness of the stair frame substructure, thereby enhancing the seismic isolation effect of the stair substructure, reducing the seismic force of the seismic isolation stairs, greatly reducing the damage to the stairs, making the stairs a "safety island", and turning the disadvantages of the supporting effect of the inclined stair treads and the stiffness effect of the filling wall in the traditional structure into advantages.

[0018] 2. The position and number of floors of the seismic isolation stair substructure in the present invention are adjusted according to the analysis results and actual engineering, and are used in combination with sliding stairs or shock-absorbing stair sections in the entire staircase. For example, traditional stairs are used in the basement, seismic isolation stair substructures are used in the bottom few floors, and shock-absorbing or sliding stairs are used in the upper stairs.

[0019] 3. The seismic isolation staircase substructure of the present invention, especially the inclined staircase section, can adopt a prefabricated structure such as a light steel structure or a prefabricated reinforced concrete frame structure, which can facilitate construction and improve the assembly rate of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a bottom floor plan of the assembled seismic isolation staircase substructure in the multi-story frame structure of the present invention;

[0022] Figure 2 It is a standard floor plan layout diagram of the assembled seismic isolation staircase substructure in the multi-story frame structure of the present invention;

[0023] Figure 3 For the present invention Figure 1 AA section diagram in;

[0024] Figure 4 For the present invention Figure 1 BB section diagram in;

[0025] Figure 5 It is a schematic diagram of the structure of a two-layer assembled seismic isolation staircase in the present invention;

[0026] Figure 6 Another bottom floor plan of the assembled seismic isolation staircase substructure in the multi-story frame structure of the present invention.

[0027] Marks and corresponding parts names in the attached drawings:

[0028] 1-seismic isolation bearing; 2-seismic isolation beam; 3-stair column; 4-inclined stair plate; 5-stair beam; 6-stair platform; 7-main support beam; 8-stair partition wall; 9-main frame beam; 10-main frame column; 11-basement stairs; 12-viscous damper. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In previous earthquakes, traditional multi-story frame structures such as school buildings were severely damaged by the staircase structure and the surrounding infill walls due to the support effect of the staircase inclined staircase 4, the stiffness effect of the infill wall, and the constraint effect, especially in the middle and low areas. Although the use of sliding stairs or shock-absorbing stairs can improve the seismic performance of traditional staircases to a certain extent, there is a problem of construction difficulty, which reduces the shock absorption efficiency.

[0039] In order to solve the problem that in traditional multi-story frame structures, the supporting effect of the stair slats 4, the stiffness effect and the constraint effect of the infill walls during earthquakes cause serious damage to the stair structure in the middle and low areas and the surrounding infill walls, the inventors, after in-depth research, proposed to provide an assembled seismic isolation stair substructure in a multi-story frame structure. The seismic isolation stair substructure can reduce seismic force and reduce stair damage by being independent of the main frame structure, making it a "safety island".

[0040] Please refer to Figures 1 to 6 An assembled seismic isolation staircase substructure in a multi-story frame structure is provided in an embodiment of the present application. The assembled seismic isolation staircase substructure is composed of upper and lower multi-story staircases in the multi-story frame structure connected as a whole. The bottom of the assembled seismic isolation staircase substructure is supported in the frame beam of the top plate of the multi-story frame main structure through a seismic isolation bearing 1. A seismic isolation joint is arranged between the facade of the assembled seismic isolation staircase substructure and the surrounding main structure, and vertical isolation joints are respectively arranged between the top and bottom of the assembled seismic isolation staircase substructure and the main structure.

[0041] The present application separates several stairwells in a multi-story frame structure from the main structure, adds necessary through stair columns 3 to form an independent frame substructure, and introduces seismic isolation bearings 1 on the ground floor or the top plate of the basement, fully utilizing the supporting effect of the inclined stair treads 4 and the stiffness effect of the infill walls to increase the stiffness of the stair frame substructure, thereby enhancing the seismic isolation effect of the stair substructure, reducing the seismic force of the seismic isolation stairs, greatly reducing the damage to the stairs, making the stairs a "safety island", and turning the disadvantages of the supporting effect of the inclined stair treads 4 and the stiffness effect of the infill walls in the traditional structure into advantages.

[0042] According to some embodiments of the present application, the assembled seismic isolation stair substructure includes prefabricated stair columns 3, prefabricated stair beams 5, prefabricated inclined stair treads 4 and stair platforms 6, wherein the prefabricated stair columns 3 are vertically distributed at the supporting corners of each stair platform 6, the prefabricated stair beams 5 are connected to the bottom and top of adjacent prefabricated stair columns 3, and the prefabricated inclined stair treads 4 are connected between two stair platforms 6. Among them, the stair beam located at the bottom of the seismic isolation stair substructure is also called a seismic isolation stair beam 2.

[0043] Specifically, prefabricated stair columns 3 are used to form a through supporting structure at the four corners of the stair platform 6 at the same position in the vertical direction, and prefabricated stair beams 5 are used to form a supporting structure around the stair platform 6. Prefabricated inclined stair treads 4 are connected between adjacent stair platforms 6 at different heights. After construction, the stair columns 3, stair beams 5, inclined stair treads 4 and stair platform 6 in the seismic isolation stair substructure form an independent frame substructure, and are isolated from the main structure by the seismic isolation joints around the substructure and the vertical isolation joints at the top and bottom of the substructure.

[0044] The multi-story staircase in the multi-story frame structure is transformed into an independent seismic isolation staircase substructure, which is composed of seismic isolation bearings 1 and embedded parts, prefabricated staircase columns 3, prefabricated staircase beams 5, prefabricated inclined staircase plates 4, staircase platforms 6 and staircase partition walls 8. The seismic isolation staircase substructure is supported on the top plate structure, the partition wall of the seismic isolation staircase substructure is separated from the main structure by seismic isolation joints, and the bottom of the seismic isolation staircase substructure is separated from the basement staircase 11 by vertical isolation joints.

[0045] In a traditional staircase, each floor's ladder beam 5 is supported by the main structure and the ladder columns 3 are discontinuous, while the seismic isolation staircase substructure adds 4 ladder columns 3 to the inclined staircase section, a total of 8 ladder columns 3, and they are set through to form an independent substructure. The 8 ladder columns 3 in the seismic isolation staircase substructure are connected by ladder beams 5 at the floor level, and the intermediate rest platform is also connected by ladder beams 5; at the same time, the support effect of the inclined stair plate 4 and the stiffness effect of the filling wall cause the seismic isolation staircase substructure to have a large stiffness. After the staircase substructure adopts a seismic isolation design, the seismic force of the upper structure will be significantly reduced, thereby reducing the damage to the stairs and staircase partition walls 8. A seismic isolation support 1 is set at the bottom of the ladder column 3. Due to the limited weight and number of floors of the stairs, the seismic isolation support 1 has a small diameter and is supported in the frame beam of the top plate of the multi-story frame main structure. Seismic isolation joints are set between the facade of the seismic isolation staircase substructure and the surrounding main structure, and vertical isolation joints are set between the upper and bottom of the seismic isolation staircase substructure and the main structure.

[0046] According to some embodiments of the present application, the seismic isolation bearing 1 is connected between the lower part of the prefabricated ladder column 3 located at the lowest level and the main support beam 7. The lower end of the seismic isolation bearing 1 is connected to the main support beam 7 through an embedded part, and the upper end of the seismic isolation bearing 1 is connected to the prefabricated ladder column 3 at the lower end of the seismic isolation staircase structure through an embedded part. It should be noted that the seismic isolation bearing 1 can adopt a rubber bearing, and the specific diameter of the seismic isolation bearing 1 can be selected according to the number of floors and weight calculation.

[0047] The main support beams 7 are two frame beams arranged relatively on the main structure. Since the main structure includes the main frame columns 10 and the main frame beams 9, the main support beams 7 are specifically connected to the main frame columns 10. In order to make the stair platform 6 flush with the corresponding floor layer, the elevation of the main support beams 7 is lower than that of the main frame beams 9.

[0048] According to some embodiments of the present application, after the prefabricated stair columns 3, prefabricated stair beams 5, and prefabricated inclined stair slabs 4 in the assembled seismic isolation stair substructure are assembled in place, concrete is poured at the connection positions of the prefabricated parts.

[0049] In order to facilitate the construction of the seismic isolation stair substructure, the seismic isolation stair substructure, especially the inclined stair section which is difficult to construct, adopts an assembled modular layout, and the stair column 3, the stair beam 5, and the inclined stair plate 4 can also be prefabricated stair columns 3, prefabricated stair beams 5, and prefabricated inclined stair plates 4. By prefabricating the stair components in advance, the accuracy of the stair components is improved, and the components only need to be assembled and connected according to the design on site, which improves the efficiency of on-site construction.

[0050] The specific construction is as follows: first construct the main structure, and pre-embed the embedded parts of the seismic isolation staircase substructure device at the position of the stair column 3; install the seismic isolation bearing 1, and then install the prefabricated stair column 3, prefabricated stair beam 5, and prefabricated inclined stair plate 4, assemble them in place, and then pour concrete at the connection position. The seismic isolation staircase substructure in this application can also adopt a light steel frame structure, which is assembled in advance and finally installed after being hoisted into place as a whole. At this time, the floor slab can be made of corrugated steel plate or steel truss floor decking. The partition wall of the room can be set in the seismic isolation staircase substructure.

[0051] According to some embodiments of the present application, the assembled seismic isolation staircase substructure is composed of 2 to 3 staircases at the bottom of the multi-story frame structure. The position and number of floors of the seismic isolation staircase substructure in the present application are adjusted according to the analysis results and the actual project, and are used in combination with sliding stairs or shock-absorbing staircase sections in the entire staircase, such as using traditional stairs in the basement, using seismic isolation staircase substructures in the bottom few floors, and using shock-absorbing or sliding stairs in the upper stairs.

[0052] Specifically, when the multi-story frame structure has a large number of floors, the stairwells of the 2-3 floors below, which are easily damaged, can be made into seismic isolation staircase substructures. The seismic isolation staircase substructures of the 2-3 floors can be isolated from the basement staircase 11 and the stairs above the 4th floor through reasonable arrangement and construction on the top floor, and are not coupled. The stairs above the 4th floor can use sliding stairs or shock-absorbing stairs, and the basement staircase 11 can use traditional stairs, so as to achieve flexible arrangement according to seismic performance and actual needs.

[0053] According to some embodiments of the present application, the assembled seismic isolation staircase substructure is a prefabricated concrete structure or a prefabricated steel structure. The seismic isolation staircase substructure adopts a prefabricated concrete structure or a prefabricated steel structure, which can improve the efficiency of on-site construction. The seismic isolation staircase substructure, especially the inclined staircase section, can adopt an assembled structure such as a light steel structure or a prefabricated reinforced concrete frame structure, which can facilitate construction and improve the assembly rate of the structure.

[0054] According to some embodiments of the present application, the assembled seismic isolation stair substructure is an on-site assembled structure or a prefabricated integral assembled structure. Among them, the on-site assembled structure is a prefabricated ladder column 3, prefabricated ladder beam 5, prefabricated inclined ladder board 4, etc., which are assembled and connected at the construction site to form a seismic isolation stair substructure; the prefabricated integral assembled structure is to form a seismic isolation stair substructure in advance outside the construction site through prefabricated ladder columns 3, prefabricated ladder beams 5, prefabricated inclined ladder boards 4, etc., and then transported to the site for overall hoisting. The use of this structure can further improve the assembly rate.

[0055] According to some embodiments of the present application, a viscous damper 12 is provided on the lower or upper layer of the assembled seismic isolation staircase substructure, and the viscous damper 12 connects the assembled seismic isolation staircase substructure to the main frame. By providing a viscous damper 12 on the lower or upper layer of the seismic isolation staircase substructure, the seismic isolation staircase substructure is connected to the main frame to form a combined seismic isolation arrangement, further improving the seismic reduction effect of the stairs.

[0056] According to some embodiments of the present application, the viscous dampers 12 are arranged at the four corners of the bottom of the assembled seismic isolation staircase substructure. The viscous dampers 12 are arranged at the four corners of the bottom of the seismic isolation staircase substructure, and the shock absorption effect on the staircase substructure is better than that arranged at the upper or middle part of the staircase substructure.

[0057] Usually, a viscous damper 12 is arranged at each of the four corners of the lowest level of the seismic isolation staircase substructure. It should be noted that the position and number of the viscous dampers 12 can be determined based on the area, number of floors and weight of the staircase substructure. When the weight of the staircase substructure is large, two viscous dampers 12 can be arranged at each corner of the staircase substructure, that is, a viscous damper 12 is arranged on both sides of each corner of the lowest level of the seismic isolation staircase substructure.

[0058] According to some embodiments of the present application, one end of the viscous damper 12 is connected to the prefabricated ladder column 3 or the seismic isolation ladder beam 2, and the other end is connected to the main frame column 10 or the main support beam 7. In order to install and connect the viscous damper 12, it is necessary to set embedded parts on the prefabricated ladder column 3 of the lowest layer of the seismic isolation building substructure and at corresponding positions on the main frame column 10. When constructing the seismic isolation building substructure, the two ends of the viscous damper 12 can be connected to the two embedded parts respectively.

[0059] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An assembled seismic isolation staircase substructure in a multi-story frame structure, characterized in that: The assembled seismic isolation staircase substructure is composed of upper and lower multi-layer staircases in a multi-layer frame structure connected as a whole. The bottom of the assembled seismic isolation staircase substructure is supported in the frame beam of the top plate of the multi-layer frame main structure through a seismic isolation bearing. A seismic isolation joint is arranged between the facade of the assembled seismic isolation staircase substructure and the surrounding main structure. Vertical isolation joints are respectively arranged between the top and bottom of the assembled seismic isolation staircase substructure and the main structure.

2. The assembled seismic isolation staircase substructure in the multi-story frame structure according to claim 1, characterized in that: The assembled seismic isolation stair substructure includes prefabricated stair columns, prefabricated stair beams, prefabricated inclined stair treads and stair platforms. The prefabricated stair columns are vertically distributed at the supporting corner points of each stair platform, the prefabricated stair beams are connected to the bottom and top of adjacent prefabricated stair columns, and the prefabricated inclined stair treads are connected between two stair platforms.

3. The assembled seismic isolation staircase substructure in the multi-story frame structure according to claim 2, characterized in that: The seismic isolation bearing is connected between the lower part of the prefabricated ladder column located at the lowest layer and the main body support beam.

4. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 2, characterized in that: After the prefabricated stair columns, prefabricated stair beams, and prefabricated inclined stair slabs in the assembled seismic isolation stair substructure are assembled in place, concrete is poured at the connection positions of the prefabricated parts.

5. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 1, characterized in that: The assembled seismic isolation staircase substructure is composed of 2 to 3 stairwells at the bottom of the multi-layer frame structure.

6. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 1, characterized in that: The assembled seismic isolation staircase substructure is a prefabricated concrete structure or a prefabricated steel structure.

7. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 1, characterized in that: The assembled seismic isolation staircase substructure is an on-site assembled structure or a prefabricated integral assembled structure.

8. The assembled seismic isolation staircase substructure in a multi-story frame structure according to any one of claims 2 to 4, characterized in that: A viscous damper is provided on the lower layer or the upper layer of the assembled seismic isolation staircase substructure, and the viscous damper connects the assembled seismic isolation staircase substructure with the main frame.

9. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 8, characterized in that: The viscous dampers are arranged at the four corners of the bottom of the assembled seismic isolation staircase substructure.

10. The assembled seismic isolation staircase substructure in a multi-story frame structure according to claim 9, characterized in that: One end of the viscous damper is connected to the prefabricated ladder column or the seismic isolation ladder beam, and the other end is connected to the main frame column or the main support beam.

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