Steel spiral spring friction shimmy vibration double-control support and construction method

Abstract

The invention discloses a steel coil spring friction shimmy vibration double-control support and a construction method, the vibration double-control support comprises a vertical vibration isolator and a horizontal vibration isolation device, the vertical vibration isolator and the horizontal vibration isolation device are connected in series up and down, and the vertical vibration isolator is located on one side of the horizontal vibration isolation device. Only the vibration isolation spring is arranged between the upper cover plate and the lower cover plate in the vertical vibration isolator, and a horizontal limiting device does not exist between the upper cover plate and the lower cover plate, so that the vertical vibration isolator has a multidirectional movement trend; the horizontal rigidity of the vibration and shock double-control support is smaller than that of a friction pendulum shock insulation support, the vibration and shock double-control support has the function of energy consumption in the horizontal direction, and when the vibration and shock double-control support is applied to a subway upper cover building or corridor shock insulation structure, abrasion of the support under temperature deformation of a building or a corridor can be effectively reduced; when the device is applied to the corridor, vibration of the corridor under wind-induced or human-induced loads can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of seismic isolation bearings, and in particular to a steel spiral spring friction pendulum vibration double-control bearing and a construction method. Background Art

[0002] In recent years, the urban space development model oriented towards rail transit hubs, namely the transit-oriented development (TOD) model, has gradually become the mainstream development model in key cities, but the vibration nuisance caused by traffic operation has become increasingly prominent, and a large number of TOD buildings face the dual threats of traffic vibration and earthquake, which seriously restricts urban development. For example, the vibration-vibration dual-control bearing disclosed in CN114197935A and CN114135138A can reduce the vertical earthquake or rail transit vibration response through lower vertical stiffness, and reduce the horizontal earthquake effect of the upper structure through horizontal seismic isolation to protect the safety of the upper building.

[0003] The double-vibration control bearing is usually composed of a vertical vibration isolation bearing with low stiffness and a seismic isolation bearing connected in series, so that the vertical vibration isolation bearing and the seismic isolation bearing are connected as one, the horizontal performance and the vertical performance are coupled, and the functions of vertical vibration isolation and horizontal seismic isolation are achieved at the same time. It is suitable for being set inside a building.

[0004] Common vertical vibration isolation bearings are composed of thick laminated rubber, air springs, steel springs, etc. Among them, metal springs are mostly used in actual engineering due to their low achievable vibration frequency and simple structure. At present, the springs in the steel coil spring unit are mainly arranged evenly in the vertical direction, and are equipped with vertical guide units for limiting, or lateral constraint units are used to limit the lateral displacement to ensure the reasonable deformation and safety of the spring under rare earthquakes. In the actual force-bearing process, this type of lateral limit device is prone to certain axial friction due to the existence of horizontal deformation, which may lead to a reduction in the vertical vibration reduction effect. And in the vibration dual-control bearing connected in series with the friction pendulum bearing, the horizontal deformation due to temperature will also bring about vertical lifting, resulting in different degrees of vertical force redistribution in the bearing, which increases the uncertainty of the vibration reduction effect. The present invention provides a steel coil spring friction pendulum vibration dual-control bearing and a construction method to solve the above problems. Summary of the invention

[0005] The present invention provides a steel spiral spring friction pendulum vibration double-control bearing and a construction method, which are applied to subway superstructures or corridor seismic isolation structures to reduce the wear of the bearings under temperature deformation of the building or corridor; when applied to a corridor, the vibration of the corridor under wind-induced or human-induced loads can also be effectively reduced.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A steel coil spring friction pendulum vibration double-control support, comprising a vertical vibration isolator and a horizontal vibration isolation device, wherein the vertical vibration isolator and the horizontal vibration isolation device are arranged in series up and down, and the vertical vibration isolator is located above or below the horizontal vibration isolation device;

[0008] The vertical vibration isolator includes a cover plate and a vibration isolation spring, the cover plate includes an upper cover plate and a lower cover plate, the vibration isolation spring is arranged between the upper cover plate and the lower cover plate, the horizontal vibration isolation device is connected to the cover plate, the vibration isolation spring includes a vertical spring and an inclined spring, the vertical spring and the inclined spring are arranged between the upper cover plate and the lower cover plate.

[0009] Furthermore, the inclined springs are arranged in groups, and the inclined springs in the groups are arranged in a centrally symmetrical manner.

[0010] Furthermore, the upper end of the tilt spring is tilted outward, and the angle between the upper end and the vertical direction is α, and the tilt angle of α is 0°-90°;

[0011] The ratio of the horizontal stiffness of the vertical vibration isolator to the horizontal stiffness of the horizontal vibration isolation device is 0.5-2, and the specific value of the angle α is determined accordingly, and is calculated by the following formula:

[0012] And 90°>α≥0°,

[0013] Among them, f n : Target vibration isolation frequency, unit: Hz;

[0014] F: bearing design capacity, unit: kN;

[0015] K p : horizontal stiffness of the horizontal seismic isolation device, unit: kN / m;

[0016] α: the angle between the tilt direction of the tilted cylindrical spring and the vertical direction, unit: °;

[0017] n1: the number of cylindrical springs placed vertically in the vertical vibration isolator, unit: piece;

[0018] n2: the number of cylindrical springs placed obliquely in the vertical vibration isolator, unit: piece;

[0019] g: acceleration due to gravity, unit: m / s 2 .

[0020] Furthermore, a damper is provided in the tilt spring.

[0021] Furthermore, the tilt spring is arranged on a side edge of the cover plate.

[0022] Furthermore, the tilt spring is arranged on the cover plate through a mounting platform, the surface of the mounting platform is a slope, and the tilt spring is arranged perpendicular to the surface of the mounting platform.

[0023] Furthermore, the horizontal seismic isolation device is a friction pendulum seismic isolation bearing.

[0024] A construction method of a steel spiral spring friction pendulum vibration dual-control support comprises the following steps:

[0025] S1, construction of lower pier: tie the steel cage of the lower pier, install the lower embedded parts, measure the flatness of the top surface of the pier, and then cast the lower pier;

[0026] S2, bearing installation: first compress the bearing by pre-compression, then lock it with a locking device so that the bearing is in a compressed state, transport the compressed bearing to the construction site and install it on the lower pier;

[0027] S3, superstructure construction: install the upper embedded parts, tie up the upper pier reinforcement cage, and then carry out superstructure construction;

[0028] S4, support release: After the construction of the superstructure is completed, the support is released. A jack is placed between the support and the lower pier or between the support and the superstructure, and the jack is driven to further compress the support. The locking device is released, and then the jack is released to slowly release the support until the support contacts the lower pier and the superstructure, completing the release of the support.

[0029] The beneficial effects of the present invention are as follows:

[0030] Only a vibration isolation spring is arranged between the upper and lower cover plates in the vertical vibration isolator, and there is no horizontal limit device between the upper and lower cover plates, so that the vertical vibration isolator has a multi-directional movement tendency;

[0031] The horizontal stiffness of the vibration-vibration dual-control bearing is smaller than that of the friction pendulum isolation bearing and has the function of absorbing energy in the horizontal direction. When applied to the isolation structure of the subway superstructure or corridor, it can effectively reduce the wear of the bearing under the temperature deformation of the building or corridor; and when applied to the corridor, it can effectively reduce the vibration of the corridor under wind-induced or human-induced loads;

[0032] The vertical vibration isolator uses a guide rod-free isolation spring to connect the upper and lower cover plates. The centrally symmetrically arranged inclined spring makes the vertical vibration isolator have the function of horizontal limit and provide a certain horizontal stiffness. Its horizontal stiffness is equivalent to that of the friction pendulum isolation bearing, and its vertical stiffness is much smaller than the latter. Therefore, the two are combined in series to achieve the decoupling of horizontal seismic motion and vertical vibration without interfering with each other, and the decoupling of horizontal isolation and vertical isolation, which makes the vibration isolation and seismic isolation design and analysis of building structures more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the split type in the locked state of the present invention;

[0034] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the lateral pressure vibration state of the present invention;

[0036] Figure 4 It is a schematic diagram of the integrated overall structure of the present invention in a locked state;

[0037] Figure 5 It is a constitutive model variation diagram of the vertical load-horizontal displacement hysteresis curve of the present invention.

[0038] Figure numerals: 1, vertical vibration isolator; 11, cover plate; 12, vibration isolation spring; 121, vertical spring; 122, inclined spring; 2, horizontal vibration isolation device. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] like Figure 1 , 2 As shown in Figures 3 and 4, a steel coil spring friction pendulum vibration double-control bearing includes a vertical vibration isolator 1 and a horizontal vibration isolation device 2, wherein the vertical vibration isolator 1 and the horizontal vibration isolation device 2 are arranged in series up and down, wherein the vertical vibration isolator 1 is located above or below the horizontal vibration isolation device 2, wherein the vertical vibration isolator 1 includes a cover plate 11 and a vibration isolation spring 12, wherein the cover plate 11 includes an upper cover plate and a lower cover plate, wherein the horizontal vibration isolation device 2 is connected to the upper cover plate or the lower cover plate, wherein the vibration isolation spring 12 is arranged between the upper cover plate and the lower cover plate, and wherein the vibration isolation spring 12 is composed of a vertical spring 121 and an inclined spring 122 in a compressed state.

[0042] like Figure 1 , 2 As shown in Figures 3 and 4, in a specific embodiment of the present invention, the vertical vibration isolator 1 and the horizontal vibration isolation device 2 are arranged in series in an upper and lower manner, and the vertical vibration isolator 1 is arranged above the horizontal vibration isolation device 2; the vertical vibration isolator 1 adopts a structure composed of an upper cover plate, a lower cover plate, a vertical spring 121 and an inclined spring 122, and the horizontal vibration isolation device 2 is fixedly connected to the bottom of the lower cover plate, and the vertical vibration isolator 1 is a box-type structure, and the vibration isolation springs 12 are arranged between the upper cover plate and the lower cover plate at intervals, the vertical springs 121 are arranged in the middle and corners of the cover plate 11, and the inclined springs 122 are arranged in groups and on the side of the cover plate 11. The multiple groups of inclined springs 122 are arranged in a centrally symmetrical manner, and the upper ends of the inclined springs 122 are inclined outwardly, and the angle between the inclined springs 122 and the vertical is α. The upper and lower ends of 2 are respectively connected to the mounting platform on the cover plate 11, and the installation and fixation of the tilt spring 122 is realized by the mounting platform with a corresponding slope. At the same time, a damper is arranged in the tilt spring 122. Through the above arrangement, the vertical vibration isolator 1 has a horizontal limit function without a horizontal limit device, and provides a certain horizontal stiffness; the horizontal seismic isolation device 2 is a friction pendulum seismic isolation bearing, including a slide rail and a ball crown, the slide rail includes an upper slide rail and a lower slide rail, the upper and lower slide rails are spherical surfaces, covered with a polytetrafluoroethylene plate, a modified polytetrafluoroethylene plate or a modified ultra-high molecular weight polyethylene plate, the middle of the upper and lower slide rails is a ball crown, the interior of which has an ultra-low friction coefficient coating, and has an extremely low horizontal friction coefficient, which greatly reduces the energy transmitted by the earthquake action and reduces the seismic response of the upper structure.

[0043] like Figure 1 , 4 As shown, when the vertical vibration isolator 1 and the horizontal vibration isolation device 2 are connected, a box-type integrated structure or a mutually independent split structure is adopted according to the building structure; when the integrated structure is adopted, the upper slide rail and the lower cover plate of the horizontal vibration isolation device 2 are an integrated structure; when the split structure is adopted, the upper slide rail and the lower cover plate of the horizontal vibration isolation device 2 are mutually independent structures and are connected by bolts.

[0044] like Figure 1 , 2As shown in Figures 3 and 5, the working principle of this embodiment is as follows: the vertical vibration isolator 1 bears the vertical deformation through the joint action of the vertical spring 121 and the inclined spring 122, thereby reducing the vertical vibration frequency of the structure and realizing vertical vibration isolation; the friction pendulum isolation support is used as the horizontal isolation device 2 to bear the horizontal deformation, reduce the horizontal displacement of the structure and realize horizontal isolation. No guide rod is provided in the vertical vibration isolator 1, and no horizontal limit structure is provided between the upper cover plate and the lower cover plate. The vertical vibration isolator 1 is provided with a centrally symmetrically arranged inclined spring 122 so that the vertical vibration isolator 1 has both the function of horizontal limit and a certain horizontal stiffness. The horizontal stiffness of the vertical vibration isolator 1 provided above is equivalent to that of the horizontal vibration isolation device 2, and the vertical stiffness is much smaller than that of the latter. Therefore, the two are connected in series as one, so that horizontal vibration isolation and vertical vibration isolation do not interfere with each other, and the horizontal vibration isolation and vertical vibration isolation are basically decoupled, which is more convenient in the vibration isolation design and isolation design and analysis of the building structure, and can effectively simplify the complexity of the analysis; at the same time, the vertical vibration isolator 1 has a certain horizontal stiffness. After being connected in series with the horizontal vibration isolation device 2, it can reduce the wear of the bearing of the building or corridor under temperature deformation and increase the service life of the bearing; the inclined spring 122 provided makes the vertical vibration isolator 1 have a multi-directional movement tendency. When the bearing is applied to the corridor structure, the vibration of the corridor under wind-induced or human-induced loads can be effectively reduced to ensure the structural safety and stability.

[0045] Figure 5 The vertical load-horizontal displacement hysteresis curve change diagram of the vibration-vibration dual-control bearing represents the constitutive model change diagram of the vibration-vibration dual-control bearing compared with the ordinary friction pendulum isolation bearing. The vertical vibration isolator 1 has a certain horizontal stiffness through the inclined spring 122, but its horizontal stiffness is smaller than the horizontal stiffness of the vertical vibration isolator with a limit device. The horizontal stiffness of the vertical vibration isolator with a limit device and the friction pendulum isolation bearing in series is equivalent to the horizontal stiffness of the friction pendulum isolation bearing, while the horizontal stiffness of the vibration-vibration dual-control bearing composed of the vertical vibration isolator 1 and the horizontal isolation device 2 in series is smaller than that of the friction pendulum isolation bearing. The smaller the horizontal stiffness, the greater the horizontal sliding displacement of the bearing. Under the temperature deformation when the horizontal earthquake action does not occur, the vibration-vibration dual-control bearing is more difficult to slip horizontally, so it can effectively reduce the wear of the bearing under temperature deformation.

[0046] Figure 5 In, D: horizontal displacement of the support;

[0047] F: horizontal restoring force of the support;

[0048] d1: sliding displacement of the ordinary friction pendulum isolation bearing;

[0049] d2: Sliding displacement of the double-controlled support with steel coil spring friction pendulum vibration.

[0050] Furthermore, the upper end of the tilt spring 122 is tilted outward, and the angle between the upper end and the vertical direction is α, and the tilt angle α is 0°-90°.

[0051] The vertical vibration isolator 1 has a certain horizontal stiffness by setting the inclined spring 122. In actual setting, the horizontal stiffness of the vertical vibration isolator 1 needs to be equivalent to the horizontal stiffness ratio of the horizontal vibration isolation device 2, and the ratio range is 0.5-2, and the specific value of the angle α is determined based on the specific ratio; similarly, the ratio of the horizontal stiffness of the vertical vibration isolator 1 to the horizontal stiffness of the horizontal vibration isolation device 2 can also be controlled according to the specific value of the angle α; the two values ​​are determined in the formula as dependent variables or independent variables according to actual conditions.

[0052] The relationship between the angle α and the horizontal stiffness ratio is calculated by the following formula:

[0053] And 90°>α≥0°,

[0054] Among them, f n : Target vibration isolation frequency, unit: Hz;

[0055] F: bearing design capacity, unit: kN;

[0056] K p : horizontal stiffness of the horizontal seismic isolation device, unit: kN / m;

[0057] α: the angle between the tilt direction of the tilted cylindrical spring and the vertical direction, unit: °;

[0058] n1: the number of cylindrical springs placed vertically in the vertical vibration isolator, unit: piece;

[0059] n2: the number of cylindrical springs placed obliquely in the vertical vibration isolator, unit: piece;

[0060] g: acceleration due to gravity, unit: m / s 2 .

[0061] Furthermore, a damper is provided in the tilt spring 122, and the tilt spring 122 is sleeved outside the damper and is coaxially arranged with the damper. The damper further enhances the vertical bearing capacity of the tilt spring 122, and also improves the horizontal stiffness of the tilt spring 122, and improves the buffering energy dissipation capacity of the tilt spring 122. When the damper is provided, since the damper and the tilt spring 122 are coaxially arranged, the damper and the tilt spring 122 are regarded as one body, and work together to provide vertical bearing capacity and horizontal stiffness.

[0062] like Figure 1 , 2As shown, further, the tilt spring 122 is arranged on the cover plate 11 through a mounting platform, and the tilt spring 122 is installed obliquely through the mounting platform. The surface of the mounting platform is a slope, and the tilt spring 122 is arranged perpendicular to the surface of the mounting platform.

[0063] Furthermore, the vertical spring 121 and the inclined spring 122 are in a compressed state during use.

[0064] A construction method of a steel spiral spring friction pendulum vibration dual-control support comprises the following steps:

[0065] S1, construction of lower pier: tie the steel cage of the lower pier, install the lower embedded parts, measure the flatness of the top surface of the pier, and then cast the lower pier;

[0066] S2, support installation: first install the vibration-vibration dual-control support, and after installation, compress the vibration-vibration dual-control support by pre-compression, and then use bolts to lock it. When the bolts are locked, the upper and lower ends of the bolts are locked on the cover plate by nuts, and the middle of the bolts passes through the vertical spring 121 located at the corner to lock the vibration-vibration dual-control support, so that the vibration isolation spring 12 in the vibration-vibration dual-control support is in a compressed state, and then the vibration-vibration dual-control support in a compressed state is transported to the construction site and installed on the lower pier;

[0067] S3, superstructure construction: install the upper embedded parts, tie up the upper pier reinforcement cage, and then carry out superstructure construction;

[0068] S4, bearing release: after the construction of the upper structure is completed, the vibration-vibration double-control bearing is released, and a jack is placed between the vibration-vibration double-control bearing and the lower pier or the vibration-vibration double-control bearing and the upper structure. The jack is used to further compress the vibration-vibration double-control bearing so that the bolts locking the vibration-vibration double-control bearing can be released. The jack is driven to further compress the bearing and then the locking device is loosened. Then the jack is loosened to slowly release the locked vibration-vibration double-control bearing until the locked vibration-vibration double-control bearing contacts the lower pier and the upper structure, completing the release of the locked vibration-vibration double-control bearing, which simultaneously plays the role of vertical vibration isolation and horizontal vibration isolation for the building structure or corridor structure; after the locked vibration-vibration double-control bearing is released, the vibration isolation spring 12 is still in a compressed state, and the friction pendulum isolation bearing remains in a compressed state during use without losing the isolation function.

[0069] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

Claims

1. A steel spiral spring friction pendulum vibration dual-control support, characterized by: It comprises a vertical vibration isolator (1) and a horizontal vibration isolation device (2), wherein the vertical vibration isolator (1) and the horizontal vibration isolation device (2) are arranged in series up and down, and the vertical vibration isolator (1) is located above or below the horizontal vibration isolation device (2); The vertical vibration isolator (1) comprises a cover plate (11) and a vibration isolation spring (12), wherein the cover plate (11) comprises an upper cover plate and a lower cover plate, wherein the vibration isolation spring (12) is arranged between the upper cover plate and the lower cover plate, and the horizontal vibration isolation device (2) is connected to the cover plate (11), wherein the vibration isolation spring (12) comprises a vertical spring (121) and an inclined spring (122), wherein the vertical spring (121) and the inclined spring (122) are arranged between the upper cover plate and the lower cover plate with a spacing therebetween.

2. The steel spiral spring friction pendulum vibration dual-control support according to claim 1, characterized in that: The inclined springs (122) are arranged in groups, and the groups of inclined springs (122) are arranged in a centrally symmetrical manner.

3. The steel spiral spring friction pendulum vibration dual-control support according to claim 2 is characterized by: The upper end of the tilt spring (122) is tilted outward, and the angle between the upper end and the vertical direction is α, and the tilt angle α is 0°-90°; The ratio of the horizontal stiffness of the vertical vibration isolator (1) to the horizontal stiffness of the horizontal vibration isolation device (2) is 0.5-2, and the specific value of the angle α is determined accordingly, and is calculated by the following formula: And 90°>α≥0°, Among them, f n : Target vibration isolation frequency, unit: Hz; F: bearing design capacity, unit: kN; K p : horizontal stiffness of the horizontal seismic isolation device, unit: kN / m; α: the angle between the tilt direction of the tilted cylindrical spring and the vertical direction, unit: °; n1: the number of cylindrical springs placed vertically in the vertical vibration isolator, unit: piece; n2: the number of cylindrical springs placed obliquely in the vertical vibration isolation device, unit: piece; g: acceleration due to gravity, unit: m / s 2 .

4. The steel spiral spring friction pendulum vibration dual-control support according to claim 1 is characterized by: A damper is provided in the tilt spring (122).

5. The steel spiral spring friction pendulum vibration dual-control support according to claim 1, characterized in that: The tilt spring (122) is arranged on the side of the cover plate (11).

6. The steel spiral spring friction pendulum vibration dual-control support according to claim 1, characterized in that: The inclined spring (122) is arranged on the cover plate (11) via a mounting platform, the surface of the mounting platform is a slope, and the inclined spring (122) is arranged perpendicular to the surface of the mounting platform.

7. The steel spiral spring friction pendulum vibration dual-control support according to claim 1, characterized in that: The horizontal seismic isolation device (2) is a friction pendulum seismic isolation support.

8. The construction method of a steel spiral spring friction pendulum vibration dual-control support according to claim 1 is characterized in that: The following steps are included: S1, construction of lower pier: tie the steel cage of the lower pier, install the lower embedded parts, measure the flatness of the top surface of the pier, and then cast the lower pier; S2, bearing installation: first compress the bearing by pre-compression, then lock it with a locking device so that the bearing is in a compressed state, transport the compressed bearing to the construction site and install it on the lower pier; S3, superstructure construction: install the upper embedded parts, tie up the upper pier reinforcement cage, and then carry out superstructure construction; S4, support release: After the construction of the superstructure is completed, the support is released. A jack is placed between the support and the lower pier or between the support and the superstructure, and the jack is driven to further compress the support. The locking device is released, and then the jack is released to slowly release the support until the support contacts the lower pier and the superstructure, completing the release of the support.

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