A steel structure seismic isolation and energy dissipation system and its construction method

Abstract

This application relates to the field of building seismic resistance technology, and particularly to a steel structure seismic isolation and vibration reduction system and its construction method. A steel structure seismic isolation and vibration reduction system includes a number of steel columns and a number of composite beams. The composite beams are arranged in a staggered manner. A pile foundation is provided at the intersection of every two composite beams. The pile foundation extends to the rock and soil layer towards the ground. An isolation bearing is installed at the intersection of every two composite beams. A steel column is provided at the intersection of every two composite beams, and the steel column is fixedly connected to the isolation bearing. A first viscous damper is provided between the steel column and the composite beam. One end of the first viscous damper is hinged to the steel column, and the other end of the viscous damper is hinged to the composite beam. This application has the effect of increasing seismic resistance.

Description

Technical Field

[0001] This application relates to the technical field of building earthquake resistance, and particularly relates to a steel structure seismic isolation system and its construction method. Background Art

[0002] If the upper and lower parts of a certain floor of a building have different plane usage functions, different structural types are adopted for the upper and lower parts of this floor, and structural conversion is carried out through this floor, then this floor is called a structural conversion floor.

[0003] A certain project is a residential building project on top of a subway. During the subway operation, large vibrations will be generated, and the vibrations will be transmitted to the residential building on top of the subway, causing the residential building to vibrate, affecting the structural safety of the residential building, and posing a large potential safety hazard when living in the residential building. Summary of the Invention

[0004] The purpose of this application is to provide a steel structure seismic isolation system and its construction method that can enhance the seismic effect.

[0005] A steel structure seismic isolation system provided by this application adopts the following technical solutions: It includes a number of steel columns and a number of composite beams. The composite beams are arranged in an interlaced manner. At the intersection of every two composite beams, a pile foundation is provided. The pile foundation extends towards the ground to the rock stratum. At the intersection of every two composite beams, a seismic isolation bearing is installed;

[0006] At the intersection of every two composite beams, one steel column is provided, and the steel column is fixedly connected to the seismic isolation bearing;

[0007] A first viscous damper is provided between the steel column and the composite beam to generate large vibrations. One end of the first viscous damper is hinged to the beam at the top of the steel column, and the other end of the first viscous damper is hinged to the composite beam.

[0008] By adopting the above technical solutions, when the subway passes under the building, the first viscous damper resists earthquakes and transmits the force generated by the vibration to the pile foundation and then conducts it to the rock stratum. The seismic isolation bearing also plays a role in earthquake resistance, and then transmits the force generated by the vibration to the pile foundation through the composite beam and transmits it to the rock stratum.

[0009] Optionally, the seismic isolation bearing includes a top plate, a bottom plate and a seismic isolation structure. The top plate is fixedly connected to the top of the seismic isolation structure, and the bottom plate is fixedly connected to the bottom of the seismic isolation structure;

[0010] A second viscous damper is provided between the bottom plate and the top plate. There are several second viscous dampers. One end of each of the several second viscous dampers is fixedly connected to the bottom plate, and the other end of each of the several second viscous dampers is connected to the top plate.

[0011] By adopting the above technical solution, while the seismic isolation structure plays a seismic isolation role, the second viscous damper is compressed, so that the second viscous damper plays a seismic resistance role, thereby further improving the seismic resistance effect of the seismic isolation bearing, and further reducing the possibility that the house is damaged by the vibration generated by the subway when the subway passes through.

[0012] Optionally, two third viscous dampers are arranged between each of the second viscous dampers and the top plate, and the two third viscous dampers are arranged at a certain angle with the second viscous damper, and the angle range is between 30° and 60°;

[0013] One ends of the two third viscous dampers are hinged to the second viscous damper, and the other ends of the two third viscous dampers are hinged to the top plate.

[0014] The second viscous damper can only contract in the vertical direction, and the vibration generated during the operation of the subway in the tunnel is not only the up-and-down vibration, but also the vibration in other directions. The second viscous damper can only play a seismic resistance role for the up-and-down vibration, so the seismic resistance effect is small. By adopting the above technical solution, when the vibration in other directions occurs, the third viscous damper deforms, thereby generating a seismic resistance effect. Moreover, the third viscous damper and the second viscous damper jointly form a linkage mechanism. Therefore, during the process of the third viscous damper approaching the second viscous damper, the second viscous damper is driven to compress, so that the second viscous damper also deforms, and thus the viscous damper also generates a seismic resistance effect, thereby further improving the seismic resistance effect of the seismic isolation bearing.

[0015] Optionally, a first sliding plate is arranged at the top end of the second viscous damper. The first sliding plate is fixedly connected to the upper side wall of the second viscous damper. A first sliding groove is formed in the side wall of the first sliding plate. The connection between the second viscous damper and the third viscous damper is placed in the first sliding groove and slides along the length direction of the first sliding groove.

[0016] During the process of the third viscous damper approaching the second viscous damper, a large pressure will be generated at the connection between the second viscous damper and the third viscous damper, and there is no support at the connection between the second viscous damper and the third viscous damper, so it is easy for the second viscous damper to bend, resulting in the second viscous damper being unable to operate. By adopting the above technical solution, the first sliding plate plays a supporting role for the second viscous damper, thereby reducing the possibility of the second viscous damper bending and increasing the service life of the second viscous damper.

[0017] Optionally, two fourth viscous dampers are provided between the second viscous damper and the bottom plate, and the two fourth viscous dampers are both arranged at a certain angle with the second viscous damper, and the angle range is between 30° and 60°;

[0018] One ends of the two fourth viscous dampers are both hinged to the second viscous damper, and the other ends of the two fourth viscous dampers are both hinged to the bottom plate.

[0019] By adopting the above technical solution, while the second viscous damper and the third viscous damper play an earthquake-resistant role, the fourth viscous damper also plays an earthquake-resistant role, thereby further improving the shock absorption effect of the seismic isolation bearing.

[0020] Optionally, a second sliding plate is arranged at the top end of the second viscous damper. The second sliding plate is fixedly connected to the side wall of the lower end of the second viscous damper. A second sliding groove is formed in the side wall of the second sliding plate. The connection position between the second viscous damper and the fourth viscous damper is placed in the second sliding groove and slides along the length direction of the second sliding groove.

[0021] By adopting the above technical solution, the second sliding plate plays a supporting role for the second viscous damper, thereby reducing the possibility of the second viscous damper being bent and increasing the service life of the second viscous damper.

[0022] Optionally, a support rod capable of automatically breaking when an earthquake of magnitude 4 or above occurs is provided between the second viscous damper and the bottom plate. One end of the support rod is fixedly connected to the second viscous damper, and the other end of the support rod is fixedly connected to the bottom plate.

[0023] When the second viscous damper, the third viscous damper and the fourth viscous damper jointly play an earthquake-resistant role, the total deformation of the second viscous damper, the third viscous damper and the fourth viscous damper is relatively large, which easily leads to a relatively high degree of movement of the house and easily leads to the instability of the house. By adopting the above technical solution, when the subway passes by normally, the vibration generated by the subway operation is small and a very high earthquake-resistant effect is not required. At this time, the support rod supports the second viscous damper, thereby making the fourth viscous damper not produce an earthquake-resistant effect, and further reducing the total deformation of the second viscous damper, the third viscous damper and the fourth viscous damper;

[0024] When an earthquake occurs and the earthquake reaches magnitude 4 or above, at this time the support column is broken by the earthquake, and the fourth viscous damper plays an earthquake-resistant role, thereby increasing the shock absorption effect of the seismic isolation bearing and reducing the possibility of the house being damaged by the earthquake.

[0025] In a second aspect, the present application also discloses a construction method of the above steel structure seismic isolation system, including the following steps:

[0026] S1: Foundation construction: Install a composite beam on the top of the subway tunnel;

[0027] S2: Set embedded parts: Install embedded threaded sleeves in the concrete;

[0028] S3: Install seismic isolation bearings: Install the seismic isolation bearings on the composite beam, and then screw the seismic isolation bearings to the threaded sleeves through bolts;

[0029] S4: Hoist the steel column: Hoist the steel column onto the seismic isolation bearing by a crane, and then screw the steel column to the seismic isolation bearing through bolts to complete the installation of the steel column;

[0030] S5: Install the first viscous damper: Hoist the first viscous damper beside the seismic isolation bearing by a crane, and then hinge the first viscous damper to the composite beam and the steel column respectively.

[0031] By adopting the above technical solution, the seismic resistance effect of the transfer layer is greatly increased, and further, the damage to the house caused by the vibration generated during the movement of the subway is reduced.

[0032] Optionally, in S3, before installing the seismic isolation bearing, first install the second viscous damper, the third viscous damper and the support rod between the top plate and the bottom plate.

[0033] By adopting the above technical solution, the seismic resistance effect of the transfer layer is further improved, and further, the damage to the house caused by the vibration is reduced.

[0034] In summary, the present application includes at least one of the following beneficial technical effects:

[0035] 1. When the subway passes under the house, the first viscous damper resists seismic motion, transmits the force generated by the vibration to the pile foundation, and conducts it to the rock and soil layer. The seismic isolation bearing also plays a role in seismic resistance, and then transmits the force generated by the vibration to the pile foundation through the composite beam and then to the rock and soil layer;

[0036] 2. While the seismic isolation structure plays a role in seismic isolation, the second viscous damper is compressed, so that the second viscous damper plays a role in seismic resistance, thereby further improving the seismic resistance effect of the seismic isolation bearing, and further reducing the possibility of the house being damaged by the vibration generated by the subway when the subway passes;

[0037] 3. When vibrations in other directions occur, the third viscous damper deforms, thereby generating a seismic resistance effect. Moreover, the third viscous damper and the second viscous damper jointly form a linkage mechanism. Then, during the process of the third viscous damper approaching the second viscous damper, the second viscous damper is driven to be compressed, so that the second viscous damper also deforms, and thus the viscous damper also generates a seismic resistance effect, thereby further improving the seismic resistance effect of the seismic isolation bearing. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the overall structure of a steel structure seismic isolation and vibration reduction system according to an embodiment of the present application.

[0039] Figure 2 It is a schematic diagram of a partial structure for reflecting the positional relationship between the vertical hole and the top plate according to an embodiment of the present application.

[0040] Figure 3 It is a schematic diagram of a structure for reflecting the positional relationship between the second viscous damper and the vibration isolation bearing according to an embodiment of the present application.

[0041] Figure 4 It is a schematic diagram of a structure for reflecting the positional relationship among the second viscous damper, the third viscous damper, and the fourth viscous damper according to an embodiment of the present application.

[0042] Figure 5 It is a schematic diagram of the second viscous damper according to an embodiment of the present application.

[0043] Figure 6 is Figure 4 A partial enlarged schematic diagram of part A in

[0044] In the figure, 11 is the composite beam; 12 is the steel column;

[0045] 2 is the vibration isolation bearing; 21 is the top plate; 22 is the bottom plate; 23 is the vibration isolation structure; 24 is the restraint steel plate; 25 is the vertical hole;

[0046] 31 is the first viscous damper; 32 is the second viscous damper; 321 is the first sliding rod; 322 is the second sliding rod; 323 is the outer sleeve; 33 is the third viscous damper; 34 is the fourth viscous damper;

[0047] 41 is the first sliding plate; 411 is the first sliding groove; 42 is the second sliding plate; 421 is the second sliding groove;

[0048] 5 is the support rod. Detailed implementation manners

[0049] The following further elaborates on the present application in conjunction with the attached Figure 1 - attached Figure 6 , for a more detailed description of the present application.

[0050] Embodiment 1:

[0051] Refer to Figure 1, A steel structure seismic isolation system is arranged in the conversion layer between the top of the subway tunnel and the floor slab 22 of the house. A steel structure seismic isolation system includes a number of composite beams 11 and a number of steel columns 12. The number of composite beams 11 are arranged staggered with each other and installed on the top of the subway tunnel. A number of steel columns 12 are all arranged above the composite beams 11. Above the staggered positions of the composite beams 11, one steel column 12 is arranged, and a pile foundation is arranged below. The pile foundation extends vertically downward to the rock and soil layer. A seismic isolation bearing 2 is arranged between the steel column 12 and the composite beam 11. The seismic isolation bearing 2 adopts the existing seismic isolation bearing 2. There are a number of seismic isolation bearings 2. One seismic isolation bearing 2 is arranged at the bottom end of each steel column 12 of the steel column 12. The seismic isolation bearing 2 is bolted to the steel column 12. Threaded sleeves are embedded in the concrete. The seismic isolation bearing 2 is threadedly connected to the threaded sleeve through bolts.

[0052] A first viscous damper 31 is arranged between the steel column 12 and the composite beam 11. One end of the first viscous damper 31 is hinged to the beam at the top end of the steel column 12, and the other end of the first viscous damper 31 is hinged to the composite beam 11.

[0053] Refer to Figure 2 , The seismic isolation bearing 2 includes a top plate 21, a bottom plate 22 and a seismic isolation structure 23. The seismic isolation structure 23 is arranged between the top plate 21 and the bottom plate 22. One end of the seismic isolation structure 23 is fixedly connected to the top plate 21, and the other end of the seismic isolation structure 23 is fixedly connected to the bottom plate 22. A restraint steel plate 24 is arranged on the outer wall of the seismic isolation structure 23. Vertical holes 25 are opened on the side walls of the bottom plate 22 and the top plate 21. Limit bolts are arranged on the restraint steel plate 24. The limit bolts penetrate through the restraint steel plate 24 and are inserted into the vertical holes 25 and slide along the length direction of the vertical holes 25. When the seismic isolation structure 23 deforms, the top plate 21 moves downward, and then the limit bolts move downward along the length direction of the vertical holes 25. The restraint steel plate 24 restricts the lateral deformation of the seismic isolation bearing 2, but does not restrict the longitudinal movement of the seismic isolation bearing 2.

[0054] The implementation principle of the embodiment of the present application is: when the subway comes and shakes, the seismic isolation bearing 2 and the first viscous damper 31 play their own shock-absorbing roles, thereby reducing the damage of the vibration to the entire house, and thus playing an earthquake-resistant role for the house.

[0055] Embodiment 2:

[0056] The difference between this Embodiment 2 and Embodiment 1 lies in the improvement of the seismic isolation bearing 2, and the restraint steel plate 24 is deleted.

[0057] Refer to Figure 3 and Figure 4 , A second viscous damper 32 is arranged between the top plate 21 and the bottom plate 22. Combine Figure 5, the second viscous damper 32 includes a first sliding rod 321, a second sliding rod 322 and an outer sleeve 323. The first sliding rod 321 and the second sliding rod 322 are respectively inserted into both ends of the outer sleeve 323 and slide along the length direction of the outer sleeve 323. The second viscous damper 32 is vertically arranged, and two third viscous dampers 33 are arranged at the top end of the second viscous damper 32.

[0058] Referring to Figure 4 , the included angle between the two third viscous dampers 33 is between 30° and 60°. In this embodiment, the included angle between the two third viscous dampers 33 is 60°. The included angles between the second viscous damper 32 and the two third viscous dampers 33 are both 30°. One ends of the two third viscous dampers 33 are both hinged to the second viscous damper 32, and the other ends of the two third viscous dampers 33 are both hinged to the top plate 21.

[0059] Referring to Figure 5 and Figure 6 , a first sliding plate 41 is fixedly connected to the top end of the outer sleeve 323. There are two first sliding plates 41, and the two first sliding plates 41 are symmetrically arranged. The two first sliding plates 41 correspond to the positions of the two third viscous dampers 33 one by one. First sliding grooves 411 are formed on both of the two first sliding plates 41. The hinged part between the second viscous damper 32 and the third viscous damper 33 is arranged in the first sliding groove 411 and slides along the length direction of the first sliding groove 411.

[0060] When a vibration occurs, the top plate 21 moves downward, leftward or rightward, thereby deforming the third viscous damper 33 and transmitting the force to the connection part between the third viscous damper 33 and the second viscous damper 32. A link mechanism is formed between the second viscous damper 32 and the third viscous damper 33. Then, during the process of the third viscous damper 33 moving towards the second viscous damper 32, the first sliding rod 321 slides into the outer sleeve 323, thereby enabling the second viscous damper 32 to produce a damping effect. Then, the second viscous damper 32 and the third viscous damper 33 simultaneously play a damping role on the house, increasing the damping effect. Moreover, when the top plate 21 moves up and down, left and right, the second viscous damper 32 can produce a damping effect, enabling the seismic isolation bearing 2 to perform multi-directional damping.

[0061] Embodiment 3:

[0062] The structure of this Embodiment 3 is basically similar to that of Embodiment 2, the difference being a further improvement on the seismic isolation bearing 2.

[0063] Referring to Figure 3 and Figure 4, there are two fourth viscous dampers 34 arranged between the bottom plate 22 and the second viscous damper 32. The included angle between the two fourth viscous dampers 34 is between 30° and 60°. In this embodiment, the included angle between the two third viscous dampers 33 is 60°, and the included angles between the second viscous damper 32 and the two fourth viscous dampers 34 are both 30°. One ends of the two fourth viscous dampers 34 are both hinged to the second viscous damper 32, and the other ends of the two fourth viscous dampers 34 are both hinged to the bottom plate 22.

[0064] The bottom end of the outer sleeve 323 is fixedly connected with a second sliding plate 42. There are two second sliding plates 42, and the two second sliding plates 42 are symmetrically arranged. The two second sliding plates 42 respectively correspond to the positions of the two fourth viscous dampers 34 one by one. Second sliding grooves 421 are formed on both of the two second sliding plates 42. The hinged part between the second viscous damper 32 and the fourth viscous damper 34 is arranged in the first sliding groove 411 and slides along the length direction of the first sliding groove 411.

[0065] A support rod 5 is arranged between the second viscous damper 32 and the bottom plate 22. In this embodiment, there are two support rods 5, and the two support rods 5 are symmetrically arranged. One end of the support rod 5 is fixedly connected with the bottom plate 22, and the other end of the support rod 5 is fixedly connected with the outer sleeve 323.

[0066] When an earthquake of magnitude less than four occurs, the support rod 5 provides rigid support to the outer sleeve 323, so that the fourth viscous damper 34 does not deform, and thus the fourth viscous damper 34 does not play a shock-absorbing role, thereby reducing the movement of the house caused by the deformation of the fourth viscous damper 34 during the shock-absorbing process.

[0067] When an earthquake of magnitude four or more occurs, a large load is generated on the support rod 5, causing the support rod 5 to break, so that the fourth viscous damper 34 deforms, enabling the fourth viscous damper 34 to generate a shock-absorbing effect, and further reducing the impact of the earthquake on the house.

[0068] The internal structures of the first viscous damper 31, the second viscous damper 32, the third viscous damper 33, and the fourth viscous damper 34 in Embodiment 1, Embodiment 2, and Embodiment 3 are the same.

[0069] This embodiment also discloses a construction method of the above steel structure seismic isolation and vibration reduction system, including the following steps:

[0070] S1: Foundation construction: Install the composite beam 11 on the top of the subway tunnel, and several composite beams 11 are staggered with each other;

[0071] S11: Set a number of concrete blocks on the composite beam 11, and the several concrete blocks are distributed at intervals on the composite beam 11 in turn;

[0072] S2: Set the embedded parts: Install the embedded threaded sleeve in the concrete block;

[0073] S3: Install the seismic isolation bearing 2: Install the seismic isolation bearing 2 on the composite beam 11, and then screw the seismic isolation bearing 2 to the threaded sleeve through bolts;

[0074] S31: Before installing the seismic isolation bearing 2, first install the second viscous damper 32, the third viscous damper 33 and the support rod 5 between the top plate 21 and the bottom plate 22.

[0075] S4: Hoist the steel column 12: Hoist the steel column 12 onto the seismic isolation bearing 2 by a crane, and then screw the steel column 12 to the seismic isolation bearing 2 through bolts to complete the installation of the steel column 12;

[0076] S5: Install the first viscous damper 31: Hoist the first viscous damper 31 beside the seismic isolation bearing 2 by a crane, and then rely on the construction workers to install the first viscous damper 31 in a narrow space by using a chain block and a jack, etc.

[0077] The embodiments of the specific implementation manners are all the preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A steel structure seismic isolation and vibration reduction system, comprising a number of steel columns (12) and a number of composite beams (11). The composite beams (11) are arranged in a staggered manner. At the intersection of every two of the composite beams (11), a pile foundation is provided, and the pile foundation extends towards the ground to the rock and soil layer. Characterized in that, At the intersection of every two of the composite beams (11), a seismic isolation bearing (2) is installed; At the intersection of every two of the composite beams (11), one of the steel columns (12) is provided, and the steel column (12) is fixedly connected to the seismic isolation bearing (2); A first viscous damper (31) is provided between the steel column (12) and the composite beam (11). One end of the first viscous damper (31) is hinged to the beam at the top of the steel column (12), and the other end of the first viscous damper (31) is hinged to the composite beam (11); The seismic isolation bearing (2) includes a top plate (21), a bottom plate (22) and a seismic isolation structure (23). The top plate (21) is fixedly connected to the top of the seismic isolation structure (23), and the bottom plate (22) is fixedly connected to the bottom of the seismic isolation structure (23); A second viscous damper (32) is provided between the bottom plate (22) and the top plate (21). There are a number of the second viscous dampers (32). One ends of the number of the second viscous dampers (32) are all fixedly connected to the bottom plate (22), and the other ends of the number of the second viscous dampers (32) are all connected to the top plate (21); Between each of the second viscous dampers (32) and the top plate (21), two third viscous dampers (33) are provided. The two third viscous dampers (33) are both arranged at a certain angle with the second viscous damper (32), and the included angle ranges between 30° and 60°; One ends of the two third viscous dampers (33) are both hinged to the second viscous damper (32), and the other ends of the two third viscous dampers (33) are both hinged to the top plate (21); A support rod (5) that can automatically break during an earthquake of magnitude 4 or above is provided between the second viscous damper (32) and the bottom plate (22). One end of the support rod (5) is fixedly connected to the second viscous damper (32), and the other end of the support rod (5) is fixedly connected to the bottom plate (22).

2. A steel structure seismic isolation and vibration reduction system according to claim 1, Characterized in that, A first sliding plate (41) is provided at the top of the second viscous damper (32). The first sliding plate (41) is fixedly connected to the upper side wall of the second viscous damper (32). A first sliding groove (411) is formed in the side wall of the first sliding plate (41). The connection position between the second viscous damper (32) and the third viscous damper (33) is placed in the first sliding groove (411) and slides along the length direction of the first sliding groove (411).

3. A steel structure seismic isolation and vibration reduction system according to claim 2, Characterized in that, There are two fourth viscous dampers (34) provided between the second viscous damper (32) and the bottom plate (22). The two fourth viscous dampers (34) are both arranged at a certain angle with the second viscous damper (32), and the angle range is between 30° and 60°; One end of each of the two fourth viscous dampers (34) is hinged to the second viscous damper (32), and the other end of each of the two fourth viscous dampers (34) is hinged to the bottom plate (22).

4. A steel structure seismic isolation and vibration reduction system according to claim 3, characterized in that A second sliding plate (42) is provided at the top of the second viscous damper (32). The second sliding plate (42) is fixedly connected to the side wall of the lower end of the second viscous damper (32). A second sliding groove (421) is formed in the side wall of the second sliding plate (42). The connection between the second viscous damper (32) and the fourth viscous damper (34) is placed in the second sliding groove (421) and slides along the length direction of the second sliding groove (421).

5. A construction method for the steel structure seismic isolation and vibration reduction system according to any one of claims 1-4, characterized in that includes the following steps: S1: Foundation construction: Install the composite beam (11) on the top of the subway tunnel; S2: Set embedded parts: Install embedded threaded sleeves in the concrete; S3: Install the seismic isolation bearing (2): Install the seismic isolation bearing (2) on the composite beam (11), and then screw the seismic isolation bearing (2) to the threaded sleeve through bolts; S4: Hoist the steel column (12): Hoist the steel column (12) on the seismic isolation bearing (2) by a crane, and then screw the steel column (12) to the seismic isolation bearing (2) through bolts to complete the installation of the steel column (12); S5: Install the first viscous damper (31): Hoist the first viscous damper (31) beside the seismic isolation bearing (2) by a crane, and then hinge the first viscous damper (31) to the composite beam (11) and the steel column (12) respectively.

6. A construction method according to claim 5, characterized in that In S3, before installing the seismic isolation bearing (2), first install the second viscous damper (32), the third viscous damper (33) and the support rod (5) between the top plate (21) and the bottom plate (22).

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