A compression-type two-stage cylindrical adjustable friction energy dissipator for building floors

Abstract

A compression-type two-stage cylindrical adjustable friction energy dissipator for building floors, which relates to the technical field of building energy dissipation and seismic reduction. The present invention aims to solve the problems that the friction force of existing friction energy dissipators is fixed, it is difficult to meet the structural design requirements, and the cost is high. The present invention includes a friction outer sleeve assembly, an inner friction assembly, a front-end elastic energy dissipation assembly, a rear-end elastic energy dissipation assembly, and two connecting columns. The two connecting columns are symmetrically fixed at the building floors. The rear-end elastic energy dissipation assembly is coaxially arranged with the inner friction assembly and is slidably connected to the inner friction assembly. The front-end elastic energy dissipation assembly is sleeved on the front end of the inner friction assembly and is slidably connected to the inner friction assembly. The friction outer sleeve assembly is sleeved on the outside of the inner friction assembly and is slidably connected to the inner friction assembly. The front end of the friction outer sleeve assembly is fixedly connected to the front-end elastic energy dissipation assembly, and the rear end of the friction outer sleeve assembly is fixedly connected to the rear-end elastic energy dissipation assembly. The present invention is used for building floor seismic reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of building energy dissipation and seismic reduction, and particularly relates to a compression-type two-stage cylindrical adjustable friction energy dissipator for building floors. Background Art

[0002] Building energy dissipators can reduce the seismic response of buildings, thereby increasing the seismic resistance of building structures and protecting the safety of the main structure. Compared with other building energy dissipators, the friction-type energy dissipator has the advantages of low cost, good durability, stable energy dissipation performance, and less influence by loading frequency and speed.

[0003] At present, most friction-type energy dissipators on the market have the characteristic of fixed friction force, which brings certain troubles to structural design. To meet the requirements of seismic codes, multiple types of friction energy dissipators need to be used in the same building, which increases the design cost to a certain extent and reduces the applicable range of friction-type energy dissipators. At the same time, the current energy dissipators are expensive, which limits the popularization and application of energy dissipators to a certain extent. Therefore, there is an urgent need to develop a friction-type shock-absorbing energy dissipator with adjustable friction force and low cost that can be applied to building floors. Summary of the Invention

[0004] In order to solve the problems that the friction force of the existing friction-type energy dissipator is fixed, it is difficult to meet the requirements of structural design and the cost is high, the present invention further provides a compression-type two-stage cylindrical adjustable friction energy dissipator for building floors.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0006] A compression-type two-stage cylindrical adjustable friction energy dissipator for building floors includes a friction outer sleeve assembly, an inner friction assembly, a front-end elastic energy dissipation assembly, a rear-end elastic energy dissipation assembly, and two connecting columns. The two connecting columns are symmetrically fixed at the center of the building floors. The inner friction assembly is horizontally hinged to one connecting column, and the rear-end elastic energy dissipation assembly is horizontally hinged to the other connecting column. The rear-end elastic energy dissipation assembly is coaxially arranged with the inner friction assembly and is slidably connected to the inner friction assembly. The front-end elastic energy dissipation assembly is sleeved on the front end of the inner friction assembly and is slidably connected to the inner friction assembly. The friction outer sleeve assembly is sleeved on the outside of the inner friction assembly and is slidably connected to the inner friction assembly. The front end of the friction outer sleeve assembly is fixedly connected to the front-end elastic energy dissipation assembly, and the rear end of the friction outer sleeve assembly is fixedly connected to the rear-end elastic energy dissipation assembly.

[0007] Further, the connecting columns are respectively vertically fixed to the lower end surface of the upper cross beam and the upper end surface of the lower cross beam.

[0008] Further, the friction outer sleeve assembly includes four L-shaped friction plates, which are spliced into a square tube shape along the circumferential direction. A plurality of connecting lugs are evenly arranged along the length direction on both side edges of the L-shaped friction plates, and adjacent connecting lugs between every two adjacent L-shaped friction plates are connected by high-strength bolts.

[0009] Further, a gap is provided between the circumferences of every two adjacent L-shaped friction plates.

[0010] Further, the inner friction assembly includes a support rod and a plurality of friction plates. The friction plates are sleeved on the support rod and are threadedly connected to the outer side wall of the support rod. The plurality of friction plates are evenly arranged along the length direction of the support rod. A set of moving guide rods are respectively provided on the outer end faces of the friction plates at the front and rear ends. The front elastic energy dissipation assembly is slidably connected to the front moving guide rod, and the rear elastic energy dissipation assembly is slidably connected to the rear moving guide rod.

[0011] Further, a plurality of friction protrusions are densely arranged on the side wall of the moving guide rod.

[0012] Further, the front elastic energy dissipation assembly includes a front connecting plate, two front elastic member fixing plates, a plurality of front elastic members, and a set of front moving guide sleeves. The front connecting plate and the two front elastic member fixing plates are respectively sleeved on the front end of the support rod from front to back. The front connecting plate is fixedly connected to the front elastic member fixing plate at the front end through a set of front connecting rods. The plurality of front elastic members are fixedly connected between the two front elastic member fixing plates evenly. A set of front moving guide sleeves are fixedly connected to the rear end face of the rear front elastic member fixing plate. Each front moving guide sleeve is respectively sleeved on the outside of a front end moving guide rod and is slidably connected to the moving guide rod.

[0013] Further, a front-end organic friction material layer is fixedly connected to the inner side wall of the front moving guide sleeve.

[0014] Further, the rear elastic energy dissipation assembly includes a connecting rod, a rear connecting plate, two rear elastic member fixing plates, a plurality of rear elastic members, and a set of rear moving guide sleeves. The rear connecting plate and the two rear elastic member fixing plates are respectively sleeved and fixedly connected on the connecting rod from back to front. The rear connecting plate is fixedly connected to the rear elastic member fixing plate at the rear end through a set of rear connecting rods. The plurality of rear elastic members are fixedly connected between the two rear elastic member fixing plates evenly. A set of rear moving guide sleeves are fixedly connected to the front end face of the rear rear elastic member fixing plate. Each rear moving guide sleeve is respectively sleeved on the outside of a rear end moving guide rod and is slidably connected to the moving guide rod.

[0015] Further, a rear-end organic friction material layer is fixedly connected to the inner side wall of the rear moving guide sleeve.

[0016] The beneficial effects included in the present invention compared with the prior art are:

[0017] 1. In the present invention, two-stage seismic resistance is adopted. In the minor earthquake stage, relative slippage occurs between the friction plate and the friction sleeve for friction energy dissipation. At this time, the addition of the energy dissipator does not significantly increase the stiffness of the building structure, reducing the amount of building materials used. In the major earthquake stage, due to the increase in the inter-story displacement of the building, relative displacement occurs between the internal support rod of the friction energy dissipator and the elastic energy dissipation components at both ends. At this time, the main energy dissipation methods of the entire friction energy dissipator are transformed into two types. One is friction energy dissipation, and the other is elastic compression energy dissipation. Through this structural measure, the energy dissipation capacity of the friction energy dissipator is greatly improved, meeting the usage requirements of high-rise buildings.

[0018] 2. In the present invention, friction energy dissipation is carried out through the internal friction plate and the external sleeve. The external sleeve is in close contact with the internal friction plate through high-strength bolts. By controlling the pre-tightening force of the high-strength bolt group outside the friction sleeve, the friction force between the friction sleeve and the internal friction plate can be indirectly controlled. Therefore, the new energy dissipator has a wider applicable range.

[0019] 3. Under the action of random seismic vibration, there is a situation of misalignment and jamming between the friction plate and the friction sleeve. Therefore, two sets of sliding guiding structures are designed. In the present invention, when the inter-story displacement of the building is large, relative sliding occurs between the moving guiding groove and the moving guiding rod. The organic polymer material inside the moving guiding groove is in occlusive contact with the unique protrusions on the moving guiding rod. When the energy dissipator undergoes relative displacement, the unique protrusions on the moving guiding rod will force the organic polymer material to deform. Through the deformation of the organic polymer material, the energy dissipation capacity of the energy dissipator is further enhanced. At the same time, through the frictional contact between the organic polymer material and the guiding rod, the shaking problem of the friction core components of the energy dissipator is restricted, preventing the situation where the energy dissipator loses its working ability and improving the practicability of the energy dissipator.

[0020] 4. In the present invention, the friction plate of the energy dissipator is installed with the support rod of the energy dissipator through thread fitting. Therefore, the number of friction plates can be increased according to the design requirements, ensuring the reliability of the structural strength while achieving the required frictional force, providing convenience for structural design.

[0021] 5. In the present invention, all the energy dissipators adopt bolted connections, greatly simplifying the on-site installation process, increasing the installation efficiency. At the same time, after the energy dissipator is damaged, the damaged area can be quickly replaced, reducing the maintenance and reconstruction costs of the structure.

[0022] 6. At present, the layout forms of interlayer energy dissipators are mostly single diagonal braces, "V"-shaped braces, "X"-shaped braces, knuckle types, etc. Different installation forms directly affect the working efficiency of the damper. So far, in the actual engineering applications, the diagonal type and the X-shaped installation methods are mostly adopted because of their simple structure and easy assembly. However, at the same time, this layout method occupies a large space, is not conducive to personnel passage and window and door layout, and the node burden is relatively heavy. In the present invention, the layout method of the energy dissipator is a cross-shaped layout. This layout method can reduce the node burden while enabling the two parts of the friction energy dissipator to move non-coupled, improving the energy dissipation capacity of the friction energy dissipator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of a compression-type two-stage cylindrical adjustable friction energy dissipator for building interlayers according to the present invention;

[0024] Figure 2 is a schematic diagram of the internal structure of the friction energy dissipator after removing the connecting column in the present invention;

[0025] Figure 3 is an exploded view of the friction outer sleeve assembly in the present invention;

[0026] Figure 4 is a schematic diagram of the structure after the internal friction component, the front-end elastic energy dissipation component and the rear-end elastic energy dissipation component are connected in the present invention;

[0027] Figure 5 is Figure 4 a schematic diagram of the structure in which the rear-end elastic energy dissipation component is separated from the internal friction component;

[0028] Figure 6 is a schematic diagram of the structure after the internal friction component and the front-end elastic energy dissipation component are connected in the present invention;

[0029] Figure 7 is an exploded view of the internal friction component and the front-end elastic energy dissipation component in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] DETAILED DESCRIPTION OF THE INVENTION I: Combine Figures 1 to 7To describe this embodiment, a compression - type two - stage cylindrical adjustable friction energy dissipator for building floors includes a friction outer sleeve assembly 1, an inner friction assembly 2, a front - end elastic energy - dissipating assembly 4, a rear - end elastic energy - dissipating assembly 5, and two connecting columns 3. The two connecting columns 3 are symmetrically fixed at the building floors. The inner friction assembly 2 is horizontally hinged to one connecting column 3, and the rear - end elastic energy - dissipating assembly 5 is horizontally hinged to the other connecting column 3. The rear - end elastic energy - dissipating assembly 5 is coaxially arranged with the inner friction assembly 2 and is slidably connected to the inner friction assembly 2. The front - end elastic energy - dissipating assembly 4 is sleeved on the front end of the inner friction assembly 2 and is slidably connected to the inner friction assembly 2. The friction outer sleeve assembly 1 is sleeved on the outside of the inner friction assembly 2 and is slidably connected to the inner friction assembly 2. The front end of the friction outer sleeve assembly 1 is fixed to the front - end elastic energy - dissipating assembly 4, and the rear end of the friction outer sleeve assembly 1 is fixed to the rear - end elastic energy - dissipating assembly 5.

[0032] In this embodiment, under the action of seismic loads, when in - plane rotational deformation occurs between the beam - column structures of the building floors, the relative sliding between the inner friction assembly 2 and the friction outer sleeve assembly 1 is used to dissipate the seismic energy input into the building by friction, attenuate the seismic response of the building, protect the main structure from damage, and ensure the safety of the structure in strong earthquakes.

[0033] Specific embodiment two: Combining Figure 1 To describe this embodiment, the connecting columns 3 are respectively vertically fixed to the lower end face of the upper - layer cross - beam and the upper end face of the lower - layer cross - beam. The technical features not disclosed in this embodiment are the same as those in specific embodiment one.

[0034] In the present invention, the arrangement of the energy dissipator is in a cross - shaped pattern. This arrangement can reduce the burden on the joints while enabling the non - coupled movement of the two parts of the friction energy dissipator, greatly improving the energy - dissipating capacity of the friction energy dissipator.

[0035] Specific embodiment three: Combining Figures 1 to 3 To describe this embodiment, the friction outer sleeve assembly 1 includes four L - shaped friction plates 11. The four L - shaped friction plates 11 are spliced along the circumferential direction to form a square - shaped cylinder. On both sides of the L - shaped friction plate 11, a plurality of connecting ear plates 12 are evenly arranged along the length direction. Between the adjacent two connecting ear plates 12 on every two adjacent L - shaped friction plates 11, they are connected by high - strength bolts 13. The technical features not disclosed in this embodiment are the same as those in specific embodiment one.

[0036] In the present invention, friction energy dissipation is carried out through the inner friction assembly 2 and the friction outer sleeve assembly 1. The L - shaped friction plate 11 is in close contact with the inner friction assembly 2 through the high - strength bolt 13. By controlling the pre - tightening force of the high - strength bolt 13, the friction force between the L - shaped friction plate 11 and the inner friction assembly can be indirectly controlled. Therefore, the new energy dissipator of the present invention has a wider application range and is more suitable for structural design.

[0037] Specific Embodiment 4: Figures 1 to 3 In this embodiment, a gap is provided between the circumferences of every two adjacent L-shaped friction plates 11. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment 3.

[0038] Such a design provides space for adjusting the pre-tightening force of the high-strength bolt 13.

[0039] Specific Embodiment 5: Figures 1 to 2 and Figures 4 to 7 In this embodiment, the inner friction assembly 2 includes a support rod 21 and a plurality of friction plates 22. The friction plates 22 are sleeved on the support rod 21 and are threadedly connected to the outer side wall of the support rod 21. The plurality of friction plates 22 are evenly distributed along the length direction of the support rod 21. A set of moving guide rods 23 are respectively provided on the outer end faces of the friction plates 22 at the front and rear ends. The front elastic energy dissipation assembly 4 is slidably connected to the front moving guide rod 23, and the rear elastic energy dissipation assembly 5 is slidably connected to the rear moving guide rod 23. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment 1.

[0040] The friction plate 22 is rectangular in shape to cooperate with the rectangular friction outer sleeve assembly 1.

[0041] The outer edge of the friction plate 22 is slidably connected to the inner end face of the L-shaped friction plate 11 in the friction outer sleeve assembly 1.

[0042] A first connecting ear plate 6 is fixedly connected to the end face at the front end of the support rod 21. A second connecting ear plate 7 is fixedly connected to the inner end face at the end of a connecting column 3. The first connecting ear plate 6 and the second connecting ear plate 7 are hinged by a first pin shaft 8.

[0043] In the present invention, the friction plate 22 and the energy dissipation support rod 21 are installed by threaded cooperation. Therefore, the number of friction plates 22 can be increased according to the design requirements, so as to ensure the reliability of the structural strength while achieving the required friction force, providing convenience for the structural design.

[0044] The outer end of the moving guide rod 23 is provided with a chamfer to facilitate the insertion of the moving guide rod 23.

[0045] The number of the front moving guide rods 23 and the rear moving guide rods 23 is four each, and the four moving guide rods 23 are symmetrically arranged in the circumferential direction.

[0046] Specific Embodiment 6: Figures 1 to 2 and Figures 4 to 7 In this embodiment, a plurality of friction protrusions are densely arranged on the side wall of the moving guide rod 23. The technical features not disclosed in this embodiment are the same as those in Specific Embodiment 5.

[0047] Embodiment VII: Combining Figures 1 to 2 and Figures 4 to 7 to describe this embodiment. The front-end elastic energy dissipation component 4 in this embodiment includes a front connecting plate 41, two front elastic member fixing plates 42, a plurality of front elastic members 43, and a set of front moving guide sleeves 44. The front connecting plate 41 and the two front elastic member fixing plates 42 are respectively sleeved on the front end of the support rod 21 from front to back. The front connecting plate 41 is fixedly connected to the front elastic member fixing plate 42 at the front end through a set of front connecting rods 45. The plurality of front elastic members 43 are uniformly fixedly connected between the two front elastic member fixing plates 42. A set of front moving guide sleeves 44 is fixedly connected to the rear end face of the front elastic member fixing plate 42 at the rear end. Each front moving guide sleeve 44 is respectively sleeved on the outside of a front-end moving guide rod 23 and is slidably connected to the moving guide rod 23. The technical features not disclosed in this embodiment are the same as those in Embodiment V.

[0048] The front elastic member 43 can be a spring. When the friction outer sleeve assembly 1 and the inner friction assembly 2 move relative to each other, the front elastic member 43 undergoes elastic deformation, thereby achieving energy dissipation.

[0049] The number of the front moving guide sleeves 44 is four, and the four front moving guide sleeves 44 are circumferentially symmetrically arranged.

[0050] Embodiment VIII: Combining Figure 7 to describe this embodiment. A front-end organic friction material layer 46 is fixedly connected to the inner side wall of the front moving guide sleeve 44 in this embodiment. The technical features not disclosed in this embodiment are the same as those in Embodiment VI.

[0051] The front-end organic friction material layer 46 is an organic polymer material, such as phenolic resin (PF) organic friction material, rubber-based organic friction material, etc.

[0052] The front-end organic friction material layer 46 is in occlusive contact with the unique protrusions on the front-end moving guide rod 23. When the damper undergoes relative displacement, relative slippage occurs between the front-end moving guide rod 23 and the front moving guide sleeve 44. The unique friction protrusions on the front-end moving guide rod 23 will force the front-end organic friction material layer 46 to undergo extrusion deformation for energy dissipation, and the energy dissipation capacity of the damper is further improved through the deformation of the front-end organic friction material layer 46.

[0053] Embodiment IX: Combining Figures 1 to 2 , Figure 4 and Figure 5In the present embodiment, the rear elastic energy dissipation component 5 includes a connecting rod 57, a rear connecting plate 51, two rear elastic member fixing plates 52, a plurality of rear elastic members 53 and a set of rear moving guide sleeves 54. The rear connecting plate 51 and the two rear elastic member fixing plates 52 are respectively sleeved and fixedly connected to the connecting rod 57 from back to front. The rear connecting plate 51 and the rear elastic member fixing plate 52 at the rear end are fixedly connected by a set of rear connecting rods 55. The plurality of rear elastic members 53 are uniformly fixedly connected between the two rear elastic member fixing plates 52. A set of rear moving guide sleeves 54 are fixedly connected to the front end face of the rear elastic member fixing plate 52 at the rear end. Each rear moving guide sleeve 54 is respectively sleeved on the outside of a rear end moving guide rod 23 and is slidably connected to the moving guide rod 23. The technical features not disclosed in the present embodiment are the same as those in the fifth specific embodiment.

[0054] The rear elastic member 53 can be a spring. When the friction outer sleeve assembly 1 and the inner friction assembly 2 move relative to each other, the rear elastic member 53 undergoes elastic deformation, thereby achieving energy dissipation.

[0055] A first connecting ear plate 6 is fixedly connected to the end face at the rear end of the connecting rod 57, and a second connecting ear plate 7 is fixedly connected to the inner end face at the end of the other connecting column 3. The first connecting ear plate 6 and the second connecting ear plate 7 are hinged by a first pin shaft 8.

[0056] The number of the rear moving guide sleeves 54 is four, and the four rear moving guide sleeves 54 are circumferentially symmetrically arranged.

[0057] Specific embodiment ten: With reference to Figures 1 to 2 、 Figure 4 and Figure 5 describe the present embodiment. A rear end organic friction material layer is fixedly connected to the inner side wall of the rear moving guide sleeve 54 in the present embodiment. The technical features not disclosed in the present embodiment are the same as those in the ninth specific embodiment.

[0058] The rear end organic friction material layer is an organic polymer material, such as phenolic resin (PF) organic friction material, rubber-based organic friction material, etc.

[0059] The rear end organic friction material layer is in occlusive contact with the specific protrusions on the rear end moving guide rod 23. When the damper undergoes relative displacement, relative sliding occurs between the rear end moving guide rod 23 and the rear moving guide sleeve 54. The specific friction protrusions on the rear end moving guide rod 23 will force the rear end organic friction material layer to undergo extrusion deformation for energy dissipation. The energy dissipation capacity of the damper is further improved through the deformation of the rear end organic friction material layer.

[0060] Working principle

[0061] Under the action of seismic loads, after the structure generates seismic responses, torsional, bending, and shear deformations occur between the structural layers. When in-plane shear deformation occurs between the beam-column structures, it will force the new type of friction energy dissipator to have relative displacement, consume seismic energy through the energy dissipator, reduce the seismic response of the building, protect the main structure from damage, and ensure the safety of the structure during an earthquake. The main ways for the new type of friction energy dissipator of the present invention to dissipate energy include:

[0062] Friction energy dissipation: In the stage of minor earthquakes, relative slip occurs between the friction plates and the friction sleeves for friction energy dissipation.

[0063] Deformation energy dissipation: In the stage of major earthquakes, due to the increase in the inter-story displacement of the building, relative movement occurs between the internal support rods and the elastic energy dissipation ends of the friction energy dissipator, and energy is dissipated through the compression deformation of the elastic members.

[0064] Friction energy dissipation and deformation energy dissipation of organic polymer materials are carried out through the relative slip between the moving guide grooves at both ends and the moving guide rods.

[0065] Service effect: The building structure adopting the new type of friction energy dissipator can reduce the seismic response by about 20% - 25%. According to past design experience, when designing a building structure adopting the new type of friction energy dissipator, the stiffness of the beam-column structure can be appropriately reduced, and the construction cost of the building structure can be reduced by 5% - 6%.

[0066] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A compression type two-stage cylindrical adjustable friction energy absorber for use between building floors, characterized in that: The invention comprises a friction outer sleeve component (1), an inner friction component (2), a front elastic energy absorption component (4), a rear elastic energy absorption component (5) and two connecting columns (3), wherein the two connecting columns (3) are fixedly connected between building layers in a centrally symmetrical manner, the inner friction component (2) is horizontally hinged on one connecting column (3), the rear elastic energy absorption component (5) is horizontally hinged on the other connecting column (3), the rear elastic energy absorption component (5) is coaxially arranged with the inner friction component (2) and is slidably connected with the inner friction component (2), the front elastic energy absorption component (4) is sleeved on the front end of the inner friction component (2) and is slidably connected with the inner friction component (2), the friction outer sleeve component (1) is sleeved on the outside of the inner friction component (2) and is slidably connected with the inner friction component (2), the front end of the friction outer sleeve component (1) is fixedly connected with the front elastic energy absorption component (4), and the rear end of the friction outer sleeve component (1) is fixedly connected with the rear elastic energy absorption component (5); The inner friction component (2) comprises a support rod (21) and a plurality of friction plates (22), the friction plates (22) being sleeved on the support rod (21) and being threadedly connected to the outer wall of the support rod (21), the plurality of friction plates (22) being evenly distributed along the length direction of the support rod (21), a group of movable guide rods (23) being respectively provided on the outer end surfaces of the friction plates (22) at the front and rear ends, the front elastic energy dissipation component (4) being slidably connected to the front movable guide rod (23), and the rear elastic energy dissipation component (5) being slidably connected to the rear movable guide rod (23); A plurality of friction protrusions are closely arranged on the side wall of the movable guide rod (23); The front elastic energy dissipation component (4) comprises a front connecting plate (41), two front elastic member fixing plates (42), a plurality of front elastic members (43) and a group of front movable guide sleeves (44); the front connecting plate (41) and the two front elastic member fixing plates (42) are respectively sleeved on the front end of the support rod (21) from front to rear; the front connecting plate (41) and the front elastic member fixing plate (42) at the front end are fixedly connected via a group of front connecting rods (45); the plurality of front elastic members (43) are evenly distributed and fixedly connected between the two front elastic member fixing plates (42); a group of front movable guide sleeves (44) are fixedly connected to the rear end surface of the rear end front elastic member fixing plate (42); each front movable guide sleeve (44) is respectively sleeved on the outer side of a front movable guide rod (23) and is slidably connected to the movable guide rod (23); A front organic friction material layer (46) is fixedly connected to the inner side wall of the front movable guide sleeve (44).

2. The compression type two-stage cylindrical adjustable friction energy absorber for use between building layers according to claim 1 is characterized in that: The connecting columns (3) are respectively vertically fixed to the lower end surface of the upper layer cross beam and the upper end surface of the lower layer cross beam.

3. The compression type two-stage cylindrical adjustable friction energy absorber for building interlayers according to claim 1 is characterized in that: The friction outer sleeve assembly (1) comprises four L-shaped friction plates (11), which are spliced ​​in a circumferential direction to form a square cylinder shape, and a plurality of connecting ear plates (12) are evenly distributed along the length direction on both side edges of the L-shaped friction plates (11), and the adjacent two connecting ear plates (12) on each two adjacent L-shaped friction plates (11) are connected by high-strength bolts (13).

4. The compression type two-stage cylindrical adjustable friction energy absorber for use between building layers according to claim 3 is characterized in that: A gap is provided between each two adjacent L-shaped friction plates (11) in the circumferential direction.

5. The compression type two-stage cylindrical adjustable friction energy absorber for building interlayers according to claim 1 is characterized in that: The rear end elastic energy dissipation component (5) comprises a connecting rod (57), a rear connecting plate (51), two rear elastic member fixing plates (52), a plurality of rear elastic members (53) and a group of rear movable guide sleeves (54); the rear connecting plate (51) and the two rear elastic member fixing plates (52) are respectively sleeved and fixedly connected to the connecting rod (57) from rear to front; the rear connecting plate (51) and the rear elastic member fixing plate (52) at the rear end are fixedly connected via a group of rear connecting rods (55); the plurality of rear elastic members (53) are evenly distributed and fixedly connected between the two rear elastic member fixing plates (52); a group of rear movable guide sleeves (54) are fixedly connected to the front end surface of the rear elastic member fixing plate (52) at the front end; each rear movable guide sleeve (54) is sleeved on the outer side of a rear end movable guide rod (23) and is slidably connected to the rear end movable guide rod (23).

6. The compression type two-stage cylindrical adjustable friction energy absorber for use between building floors according to claim 5 is characterized in that: A rear end organic friction material layer is fixedly connected to the inner side wall of the rear movable guide sleeve (54).

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