CN113090705B - Nonlinear horizontal shock isolation device - Google Patents
Nonlinear horizontal shock isolation device Download PDFInfo
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- CN113090705B CN113090705B CN202110242941.6A CN202110242941A CN113090705B CN 113090705 B CN113090705 B CN 113090705B CN 202110242941 A CN202110242941 A CN 202110242941A CN 113090705 B CN113090705 B CN 113090705B
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- guide rail
- hinge plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
Abstract
The invention provides a nonlinear horizontal shock isolation device which comprises a panel, an upper guide rail pair fixedly connected with the panel, a bottom plate, a lower guide rail pair fixedly connected with the bottom plate, a pull rod damper and a spherical hinge connecting piece, wherein the upper guide rail pair is fixedly connected with the panel; the panel is fixedly connected with a protected structure, and the bottom plate is fixedly connected with the ground or a non-protected structure; the upper end of the spherical hinge connecting piece is fixedly connected with the upper guide rail pair, and the lower end of the spherical hinge connecting piece is fixedly connected with the lower guide rail pair; one end of the pull rod damper is hinged with the spherical hinge connecting piece, and the other end of the pull rod damper is hinged with a protected structure, the ground or a non-protected structure. The invention provides a horizontal shock isolation device with high shock isolation performance and low assembly and processing difficulty.
Description
Technical Field
The invention relates to the field of shock insulation, in particular to a nonlinear horizontal shock insulation device.
Background
The seismic isolation technology is an economic and effective technical means for reducing earthquake disasters and becomes one of the most important achievements of seismic engineering. The existing horizontal shock insulation device mainly comprises a lead core rubber shock insulation support, a friction pendulum shock insulation support and the like, wherein the lead core rubber shock insulation support is suitable for a heavy structure and is not suitable for a light structure; the latter has poor torsional stability, high design requirements for friction surfaces and difficult realization.
Disclosure of Invention
In order to improve the shock insulation performance of the shock insulation device, improve the application range of the shock insulation device and better protect the safety of a structure under the action of an earthquake, the invention provides a nonlinear horizontal shock insulation device, which comprises a panel, an upper guide rail pair fixedly connected with the panel, a bottom plate, a lower guide rail pair fixedly connected with the bottom plate, a pull rod damper and a spherical hinge connecting piece, wherein the upper guide rail pair is fixedly connected with the panel;
the panel is fixedly connected with a protected structure, and the bottom plate is fixedly connected with the ground or a non-protected structure;
the upper end of the spherical hinge connecting piece is fixedly connected with the upper guide rail pair, and the lower end of the spherical hinge connecting piece is fixedly connected with the lower guide rail pair;
one end of the pull rod damper is hinged with the spherical hinge connecting piece, and the other end of the pull rod damper is hinged with a protected structure, the ground or a non-protected structure.
Preferably, the spherical hinge connecting piece comprises an upper spherical hinge plate, a spherical hinge connecting assembly and a lower spherical hinge plate;
the upper spherical hinge plate is fixedly connected with the upper guide rail pair, and the lower spherical hinge plate is fixedly connected with the lower guide rail pair;
the upper spherical hinge plate and the lower spherical hinge plate are fixedly connected through the spherical hinge connecting assembly.
Preferably, the bottom surface of the upper spherical hinge plate is provided with a spherical groove, and the upper spherical hinge plate is provided with a first counter sink;
the top surface of the lower spherical hinge plate is fixedly provided with a spherical convex block with the same radius as the spherical groove of the upper spherical hinge plate, and the convex height of the spherical convex block is greater than the depth of the spherical groove of the upper spherical hinge plate;
and the lower spherical hinge plate is provided with a second counter sink corresponding to the first counter sink of the upper spherical hinge plate.
Preferably, a middle rubber ring is arranged between the bottom surface of the upper spherical hinge plate and the top surface of the lower spherical hinge plate;
the middle rubber ring is concentrically arranged with the first counter sink and the second counter sink, and the thickness of the middle rubber ring is larger than the gap height of the upper spherical hinge plate and the lower spherical hinge plate when the upper spherical hinge plate and the lower spherical hinge plate are placed in parallel;
the first counter sink hole of the upper spherical hinge plate is provided with an upper rubber ring, and the second counter sink hole of the lower spherical hinge plate is provided with a lower rubber ring.
Preferably, the spherical hinge connecting assembly includes a spherical hinge connecting bolt and a spherical hinge connecting nut which fixedly connect the upper spherical hinge plate and the lower spherical hinge plate.
Preferably, the drag link damper includes an upper drag link damper and a lower drag link damper;
the upper pull rod damper and the lower pull rod damper respectively comprise a moving rod end part and a fixed rod end part;
the end part of a moving rod of the upper pull rod damper is hinged with the upper spherical hinge plate, and the end part of a fixed rod is hinged with the protected structure;
the end part of a moving rod of the lower pull rod damper is hinged with the lower spherical hinge plate, and the end part of a fixed rod is hinged with the ground or a non-protection structure.
Preferably, the upper guide rail pair comprises an upper arc-shaped guide rail and an upper sliding block connected with the upper arc-shaped guide rail in a sliding manner;
the lower guide rail pair comprises a lower arc-shaped guide rail and a lower sliding block which is in sliding connection with the lower arc-shaped guide rail;
the upper spherical hinge plate is fixedly connected with the upper sliding block, and the lower spherical hinge plate is fixedly connected with the lower sliding block;
the upper arc-shaped guide rail and the lower arc-shaped guide rail are orthogonally arranged on a horizontal projection plane.
Preferably, the upper arc-shaped guide rail is set to be the highest in the middle of the guide rail, and the lowest in the two ends of the guide rail and equal in height;
the lower arc-shaped guide rail is arranged to be the lowest in the middle of the guide rail, and the highest in the two ends of the guide rail is equal in height.
Preferably, the panel is provided with an upper mounting groove for mounting the upper arc-shaped guide rail, and the bottom plate is provided with a lower mounting groove for mounting the lower arc-shaped guide rail;
the upper portion mounting groove is internally provided with an upper portion cambered surface which is attached to the upper portion arc-shaped guide rail, and the lower portion mounting groove is internally provided with a lower portion cambered surface which is attached to the lower portion arc-shaped guide rail.
Preferably, the upper curved guide rail is fixedly connected to a diagonal line of one direction of the panel, and the lower curved guide rail is fixedly connected to a diagonal line of the other direction of the bottom plate.
Preferably, the slider can be configured as a rolling body slider or a sliding body slider.
Preferably, the panel further comprises a tension spring arranged between the panel and the bottom plate.
Preferably, the extension springs include a plurality of upper extension springs and a plurality of lower extension springs;
one end of the upper extension spring is connected with the upper spherical hinge plate, and the other end of the upper extension spring is connected with the panel or a connecting piece fixed on the panel;
one end of the lower extension spring is connected with the lower spherical hinge plate, and the other end of the lower extension spring is connected with the bottom plate or a connecting piece fixed on the bottom plate.
Preferably, the system further comprises a plurality of nonlinear horizontal seismic isolation devices which are fixedly connected into a whole through a panel of the nonlinear horizontal seismic isolation devices by a connecting member;
the number of the nonlinear horizontal seismic isolation devices is at least 3.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a nonlinear horizontal shock isolation device which comprises a panel, an upper guide rail pair fixedly connected with the panel, a bottom plate, a lower guide rail pair fixedly connected with the bottom plate, a pull rod damper and a spherical hinge connecting piece, wherein the upper guide rail pair is fixedly connected with the panel; the panel is fixedly connected with a protected structure, and the bottom plate is fixedly connected with the ground or a non-protected structure; the upper end of the spherical hinge connecting piece is fixedly connected with the upper guide rail pair, and the lower end of the spherical hinge connecting piece is fixedly connected with the lower guide rail pair; one end of the pull rod damper is hinged with the spherical hinge connecting piece, and the other end of the pull rod damper is hinged with a protected structure, the ground or a non-protected structure. The invention provides a horizontal shock isolation device with high shock isolation performance and low assembly and processing difficulty.
The pull rod dampers can provide damping force in the states of tension and compression, do not provide extra rigidity for the shock isolation devices, are arranged on the parallel sides of the upper guide rail pair and the lower guide rail pair, absorb the kinetic energy of the reciprocating motion of the nonlinear horizontal shock isolation devices and convert the kinetic energy into heat energy, and therefore the effects of reducing displacement and dissipating energy are achieved.
2. In the case of insufficient restoring force, the extension spring may provide additional restoring force.
The restoring force provided by the extension spring is nonlinear, when the nonlinear horizontal shock isolation device is in an initial position, the additional rigidity of the extension spring to the shock isolation device is zero, and along with the increase of displacement, the additional rigidity of the extension spring to the shock isolation device is also improved.
3. The upper arc-shaped guide rail and the lower arc-shaped guide rail are arc-shaped, so that the self-resetting function of the whole device is improved.
4. Meanwhile, a protected structure is arranged on the nonlinear horizontal shock insulation devices, so that the nonlinear horizontal shock insulation devices can be suitable for structures with different weights.
Under the action of earthquake, when the protected structure and the panel fixedly connected with the protected structure move relative to the bottom plate, the upper and lower guide rail pairs decompose the displacement of the panel into displacement in respective directions, and because the protected structure is fixedly connected with a plurality of panels at the same time, the panels are limited to rotate relative to the bottom plate, namely the arc-shaped guide rail arranged on the panel can not rotate relative to the bottom plate, but the sliding track of the sliding block on the arc-shaped guide rail is an arc with the radius R value, namely, the normal of the mounting plane of the slide block always points to the center of the circular arc, so that the upper slide block and the lower slide block are in the process of moving, the normal line of the mounting plane forms an included angle alpha with the vertical direction, and the spherical hinge connecting piece allows the upper spherical hinge plate and the lower spherical hinge plate to form a swing angle to offset the included angle alpha, thus, the panel, which is fixedly connected to the protected structure, moves in the same translational up and down motion relative to the base plate.
Drawings
Fig. 1 is a schematic view of the overall structure of a nonlinear horizontal seismic isolation apparatus according to a first embodiment;
FIG. 2 is a top view of a nonlinear horizontal seismic isolation apparatus according to a first embodiment;
FIG. 3 is a schematic view showing the overall structure of a ball joint and a rod damper according to the first embodiment;
FIG. 4 is a schematic view of the overall structure of a nonlinear horizontal seismic isolation apparatus according to a second embodiment;
FIG. 5 is a top view of a nonlinear horizontal seismic isolation apparatus according to a second embodiment;
fig. 6 is a schematic view of the overall structure of four sets of nonlinear horizontal seismic isolation devices according to the third embodiment;
FIG. 7 is a top view of four sets of non-linear horizontal seismic isolators without extension springs according to a third embodiment;
FIG. 8 is a top view of four sets of nonlinear horizontal seismic isolation devices with extension springs according to a third embodiment;
FIG. 9 is a schematic view of the overall structure of six sets of nonlinear horizontal seismic isolation devices according to the fourth embodiment;
wherein: 1. a panel; 2. a base plate; 3. a spherical hinge plate is arranged; 4. a spherical hinge plate is arranged; 5. an upper arcuate guide rail; 6. a lower arc-shaped guide rail; 7. an upper slide block; 8. a lower slider; 9. an upper tie bar damper; 10. a lower tie bar damper; 11. an upper damping connection; 12. a lower damping connection; 13. a ball hinge connecting bolt; 14. the spherical hinge is connected with a nut; 15. an upper rubber ring; 16. a lower rubber ring; 17. a middle rubber ring; 18. an upper tension spring; 19. a lower extension spring; 20. an upper triangular connector; 21. a lower triangular connecting piece.
Detailed Description
The invention discloses a nonlinear horizontal shock isolation device which achieves the effects of high shock isolation performance, low assembly and processing difficulty and suitability for structures with different weights.
Example 1
As shown in fig. 1, 2 and 3, a nonlinear horizontal seismic isolation device comprises a panel 1, an upper guide rail pair fixedly connected with the panel 1, a bottom plate 2, a lower guide rail pair fixedly connected with the bottom plate 2, a pull rod damper and a spherical hinge connecting piece;
the panel 1 is fixedly connected with a protected structure, and the bottom plate 2 is fixedly connected with the ground or a non-protected structure; the upper end of the spherical hinge connecting piece is fixedly connected with the upper guide rail pair, and the lower end of the spherical hinge connecting piece is fixedly connected with the lower guide rail pair.
The upper guide rail pair comprises an upper arc-shaped guide rail 5 and an upper sliding block 7 which is in sliding connection with the upper arc-shaped guide rail 5; the lower guide rail pair comprises a lower arc-shaped guide rail 6 and a lower sliding block 8 which is connected with the lower arc-shaped guide rail 6 in a sliding way.
The upper arc-shaped guide rail 5 and the lower arc-shaped guide rail 6 are arc-shaped guide rails; the slider may be a rolling slider or a sliding slider, and here, taking the sliding slider as an example, the sliding track of the slider is in the shape of an arc with a radius R, and the radius R of the sliding track ranges from 2 meters to infinity.
The panel 1 and the bottom plate 2 are arranged in a square shape, an upper mounting groove is formed in the panel 1, the top surface of the upper mounting groove is provided with an upper cambered surface, and the upper cambered guide rail 5 is fixedly connected in the upper mounting groove and is attached to the upper cambered surface; the bottom plate 2 is provided with a lower mounting groove, the bottom surface of the lower mounting groove is provided with a lower arc surface, and the lower arc-shaped guide rail 6 is fixedly connected in the lower mounting groove and is attached to the lower arc surface. The upper arc-shaped guide rail 5 and the lower arc-shaped guide rail 6 are orthogonally arranged on the horizontal projection plane, the upper arc-shaped guide rail 5 is fixedly connected to the diagonal line of one direction of the panel 1, and the lower arc-shaped guide rail 6 is fixedly connected to the diagonal line of the other direction of the bottom plate 2.
The spherical hinge connecting piece comprises an upper spherical hinge plate 3, a spherical hinge connecting assembly and a lower spherical hinge plate 4; a spherical groove is formed in the center of the bottom surface of the upper spherical hinge plate 3, and four first counter sink holes are formed in the periphery of the upper spherical hinge plate 3; the center of the top surface of the lower spherical hinge plate 4 is fixedly provided with a spherical convex block with the same radius as the spherical groove of the upper spherical hinge plate 3, the convex height of the spherical convex block is greater than the depth of the spherical groove of the upper spherical hinge plate 3, and four second countersunk holes corresponding to the first countersunk holes of the upper spherical hinge plate 3 are arranged around the lower spherical hinge plate 4. The upper spherical hinge plate 3 and the lower spherical hinge plate 4 are fixedly connected through a spherical hinge connecting component.
The upper spherical hinge plate 3 is arranged above the lower spherical hinge plate 4, the spherical convex block of the lower spherical hinge plate 4 is embedded in the spherical groove of the upper spherical hinge plate 3, a gap exists between the bottom surface of the upper spherical hinge plate 3 and the top surface of the lower spherical hinge plate 4, and the spherical convex block and the spherical groove can slide relatively to form a swing angle between the upper spherical hinge plate 3 and the lower spherical hinge plate 4.
Four middle rubber rings 17 are arranged between the bottom surface of the upper spherical hinge plate 3 and the top surface of the lower spherical hinge plate 4, the middle rubber rings 17 are concentrically arranged with the first countersunk holes and the second countersunk holes, and the thickness of the middle rubber rings 17 is larger than the gap height when the upper spherical hinge plate 3 and the lower spherical hinge plate 4 are placed in parallel; an upper rubber ring 15 is concentrically arranged in each first countersunk hole in the upper spherical hinge plate 3, and a lower rubber ring 16 is concentrically arranged in each second countersunk hole in the lower spherical hinge plate 4.
The spherical hinge connecting assembly comprises spherical hinge connecting bolts 13 and spherical hinge connecting nuts 14, the four spherical hinge connecting bolts 13 sequentially penetrate through an upper rubber ring 15, a first countersunk hole in the upper spherical hinge plate 3, a middle rubber ring 17, a second countersunk hole in the lower spherical hinge plate 4 and a lower rubber ring 16 and the spherical hinge connecting nuts 14 according to set fastening force, so that the upper spherical hinge plate 3 and the lower spherical hinge plate 4 are fixedly connected, the upper rubber ring 15 and the lower rubber ring 16 are pressed under the action of the set fastening force to generate set compression displacement, and the upper surfaces of the four middle rubber rings 17 between the upper spherical hinge plate 3 and the lower spherical hinge plate 4 are tightly attached to the bottom surface of the upper spherical hinge plate 3 and the lower surface of the lower spherical hinge plate 4.
The upper sliding block 7 is fixedly connected to the top surface of the upper spherical hinge plate 3 through a bolt, and the lower sliding block 8 is fixedly connected to the bottom surface of the lower spherical hinge plate 4.
The pull rod damper comprises an upper pull rod damper 9 and a lower pull rod damper 10; the upper pull rod damper 9 and the lower pull rod damper 10 both comprise an end part of a moving rod and an end part of a fixed rod; the upper portion pull rod damper 9 and the upper portion arc-shaped guide rail 5 are arranged in parallel in the horizontal plane projection, the end portion of a moving rod of the upper portion pull rod damper 9 is hinged to the upper spherical hinge plate 3 through a connecting pin placed horizontally, two ends of the connecting pin are tightened and fixed through nuts, the end portion of a fixing rod is hinged to the upper portion damping connecting piece 11 through the connecting pin placed horizontally, and the upper portion damping connecting piece 11 is fixedly connected with a protected structure through bolts.
The lower pull rod damper 10 and the lower arc-shaped guide rail 6 are arranged in parallel in the horizontal plane projection, the end part of a moving rod of the lower pull rod damper 10 is hinged with the lower spherical hinge plate 4 through a horizontally placed connecting pin, two ends of the connecting pin are tightened and fixed through nuts, the end part of a fixed rod is hinged with the lower damping connecting piece 12 through a horizontally placed connecting pin, and the lower damping connecting piece 12 is fixedly connected with the ground or a non-protection structure through bolts.
Example 2
As shown in fig. 4 and 5, in the case where the restoring force is insufficient, extension springs may be added, and the extension springs include four upper extension springs 18 and four lower extension springs 19. The four upper tension springs 18 are symmetrically arranged with the axis of the upper arc-shaped guide rail 5 as a symmetry line, the axis of the upper arc-shaped guide rail 5 is parallel to the axis of the upper rod damper 9 in a plane, and two upper tension springs 18 are respectively arranged on both sides of the upper arc-shaped guide rail 5. When the vibration isolation device is in an initial position, the upper extension spring 18 and the upper arc-shaped guide rail 5 are arranged orthogonally in a horizontal plane projection.
The panel 1 is fixedly connected with an upper triangular connecting piece 20 through a bolt, a first through hole used for connecting an extension spring is formed in the upper spherical hinge plate 3, one end of the upper extension spring 18 is rotatably connected with the first through hole of the upper spherical hinge plate 3, and the other end of the upper extension spring 18 is fixedly connected with the upper triangular connecting piece 20 through a bolt and a pressing piece.
The four lower tension springs 19 are symmetrically arranged with the axis of the lower arc-shaped guide rail 6 as a symmetry line, and two lower tension springs 19 are respectively arranged on both sides of the lower arc-shaped guide rail 6. When the vibration isolation device is in an initial position, the lower extension spring 19 and the lower arc-shaped guide rail 6 are arranged orthogonally in a horizontal plane projection.
The bottom plate 2 is fixedly connected with a lower triangular connecting piece 21 through a bolt, a second through hole used for connecting an extension spring is formed in the lower spherical hinge plate 4, one end of the lower extension spring 19 is rotatably connected with the second through hole of the lower spherical hinge plate 4, and the other end of the lower extension spring 19 is fixedly connected with the lower triangular connecting piece 21 through a bolt and a pressing piece.
When the vibration isolation device is at the initial position, the upper extension spring 18 and the lower extension spring 19 are orthogonally arranged in the horizontal plane projection, and the extension springs are already in a stretching state when the nonlinear horizontal vibration isolation device is at the initial position.
Example 3
In order to keep the protected structure balanced and the stress distribution of the nonlinear horizontal vibration isolation devices is reasonable, the number of the nonlinear horizontal vibration isolation devices is 3 or more.
As shown in fig. 6, 7 and 8, the nonlinear horizontal seismic isolation devices mentioned in examples 1 and 2 can be assembled into a 2 × 2 nonlinear horizontal seismic isolation device in a 2 × 2 arrangement, four upper arc-shaped guide rails 5 of the 2 × 2 nonlinear horizontal seismic isolation device are arranged in parallel in a horizontal plane projection, wherein two upper arc-shaped guide rails 5 of a diagonal line are projected into a straight line in the horizontal plane; in addition, the four lower arc-shaped guide rails 6 are arranged in parallel in the horizontal plane projection, wherein two lower arc-shaped guide rails 6 of one diagonal line are in a straight line in the horizontal plane projection.
The periphery sides of the panel 1 and the bottom plate 2 are provided with threaded holes for assembling four nonlinear horizontal shock insulation devices. In the present embodiment, the connecting member for connecting four nonlinear horizontal seismic isolation devices is made of square steel. The four panels 1 of the nonlinear horizontal shock insulation devices are fixedly connected through bolts and square steel, so that the four nonlinear horizontal shock insulation devices are combined into a whole.
The pull rod damper can be installed inside a 2 x 2 type nonlinear horizontal shock isolation device, the upper pull rod damper 9 and the upper arc-shaped guide rail 5 are arranged in parallel in the horizontal plane projection, wherein the end part of a moving rod of the upper pull rod damper 9 is hinged with an upper spherical hinge plate 3 corresponding to one of the upper arc-shaped guide rails 5 which form a straight line on the horizontal projection plane through a connecting pin, the end part of a fixed rod is hinged with a panel 1 corresponding to the other upper arc-shaped guide rail 5 which form a straight line on the horizontal projection plane through an upper damping connecting piece 11, and the upper pull rod damper 9 is arranged on the same side of the two upper arc-shaped guide rails 5 which form a straight line on the horizontal projection plane.
The lower pull rod damper 10 and the lower arc-shaped guide rails 6 are arranged in parallel in horizontal plane projection, the end part of a moving rod of the lower pull rod damper 10 is hinged with a lower spherical hinge plate 4 corresponding to one lower arc-shaped guide rail 6 which is in a straight line on the horizontal projection plane through a connecting pin, the end part of a fixed rod is hinged with a bottom plate 2 corresponding to the other lower arc-shaped guide rail 6 which is in a straight line on the horizontal projection plane through a lower damping connecting piece 12, and the lower pull rod damper 10 is arranged on the same side of the two lower arc-shaped guide rails 6 which are in a straight line on the horizontal projection plane.
Example 4
As shown in fig. 1, 4 and 9, the nonlinear horizontal seismic isolation devices mentioned in examples 1 and 2 can be assembled into a 2 × 3 type nonlinear horizontal seismic isolation device in a 2 × 3 arrangement, six upper arc-shaped guide rails 5 of the 2 × 3 type nonlinear horizontal seismic isolation device are arranged in parallel in a horizontal plane projection, and in addition, six lower arc-shaped guide rails 6 are arranged in parallel in a horizontal plane projection.
The periphery sides of the panel 1 and the bottom plate 2 are provided with threaded holes for assembling six nonlinear horizontal shock insulation devices. In the present embodiment, the connecting member for connecting six nonlinear horizontal seismic isolation devices is made of square steel. The panel 1 of six nonlinear horizontal shock insulation devices is fixedly connected through bolts and square steel, and seen from a horizontal projection plane, every two nonlinear horizontal shock insulation devices are tightly and fixedly connected, so that 3 groups of 1X 2 type combinations are formed, then every two 1X 2 type combinations in 3 groups are arranged at equal intervals, and the panel 1 is fixedly connected through the square steel, so that the six nonlinear horizontal shock insulation devices are combined into a whole, and six bottom plates 2 are respectively fixedly connected with the ground or a non-protection structure.
Two upper pull rod dampers 9 are respectively arranged on nonlinear horizontal shock insulation devices at two ends of a diagonal line, the upper pull rod dampers 9 and an upper arc-shaped guide rail 5 are arranged in parallel in the horizontal plane projection, the end part of a moving rod of each upper pull rod damper 9 is hinged with an upper spherical hinge plate 3 corresponding to the upper arc-shaped guide rail 5 of the nonlinear horizontal shock insulation device through a connecting pin, the end part of a fixed rod is hinged with an upper damping connecting piece 11 through a horizontally arranged connecting pin, and the upper damping connecting piece 11 is fixedly connected with a protected structure through a bolt;
two lower pull rod dampers 10 are respectively arranged on nonlinear horizontal shock insulation devices at two ends of the other diagonal line, the lower pull rod dampers 10 and the lower arc-shaped guide rails 6 are arranged in parallel in the horizontal plane projection, the end parts of the moving rods of the lower pull rod dampers 10 are hinged with the lower spherical hinge plates 4 corresponding to the lower arc-shaped guide rails 6 of the nonlinear horizontal shock insulation devices through connecting pins, the end parts of the fixed rods are hinged with lower damping connecting pieces 12 through the horizontally placed connecting pins, and the lower damping connecting pieces 12 are fixedly connected with the ground or a non-protection structure through bolts.
Example 5
The invention also provides a using method of the nonlinear horizontal shock isolation device, which comprises the following steps:
when an earthquake occurs, the panel 1 fixedly connected with the protected structure generates horizontal displacement relative to the bottom plate 2 fixedly connected with the ground or the non-protected structure through the spherical hinge connecting piece connecting the upper guide rail pair and the lower guide rail pair, and converts kinetic energy generated by the horizontal displacement into heat energy through the pull rod damper connected with the spherical hinge connecting piece, so that the earthquake energy is dissipated, and the stability of the protected structure is improved.
The panel 1 fixedly connected with the protected structure generates displacement in the horizontal direction relative to the bottom plate 2 fixedly connected with the ground or the unprotected structure through the spherical hinge connecting piece connecting the upper guide rail pair and the lower guide rail pair, and specifically comprises:
an upper spherical hinge plate 3 of the spherical hinge connecting piece fixedly connected with the upper guide rail pair and a lower spherical hinge plate 4 of the spherical hinge connecting piece fixedly connected with the lower guide rail pair form a swing angle.
With the last spherical hinge board 3 of the spherical hinge connecting piece of the vice fixed connection of last guide rail and with the spherical hinge connecting piece's of the vice fixed connection of lower guide rail lower spherical hinge board 4 form the pivot angle, specifically include:
the upper slide block 7 of the upper guide rail pair fixedly connected with the upper spherical hinge plate 3 slides on the upper arc-shaped guide rail 5 of the upper slide rail fixedly connected with the panel 1.
The lower slide block 8 of the lower guide rail pair fixedly connected with the lower spherical hinge plate 4 slides on the lower arc-shaped guide rail 6 of the lower slide rail fixedly connected with the bottom plate 2, and the upper arc-shaped guide rail 5 and the lower arc-shaped guide rail 6 are orthogonally arranged on a horizontal projection plane, so that the horizontal earthquake action is decomposed into the earthquake action in two orthogonal directions, and then the horizontal earthquake action is isolated, and the earthquake reaction of a protected structure is weakened.
The function of the arc-shaped guide rail is to adjust the natural frequency of the nonlinear horizontal vibration isolation device so as to achieve the purpose of reducing the natural frequency of a protected structure and provide restoring force meeting the use requirement, wherein the arc-shaped guide rail pair takes gravity as the restoring force.
The principle of the arc guide rail pair for adjusting the natural frequency is consistent with the simple pendulum principle, and the recovery period T of the arc guide rail pair is1Is given by the formula
Wherein L is the radius of the arc-shaped guide rail, and g is the gravity acceleration.
Through the above formula calculation, under the condition that the gravity restoring force is insufficient, extension springs can be additionally arranged between the panel 1 and the upper spherical hinge plate 3 and between the bottom plate 2 and the lower spherical hinge plate 4, and the extension springs take the self extension elasticity thereof as the restoring force.
When the nonlinear horizontal shock isolation device is at an initial position, the extension spring and the arc-shaped guide rail corresponding to the extension spring are orthogonally arranged in the horizontal plane projection, and the rigidity provided by the extension spring is 0; when an earthquake occurs, the rigidity provided by the tension spring to the nonlinear horizontal shock isolation device is increased along with the increase of displacement, and the recovery period T of the tension spring is2Is given by the formula
Where m is the total mass of the upper body and k is the instantaneous stiffness provided by the extension spring.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (7)
1. A nonlinear horizontal seismic isolation device is characterized in that: the device comprises a panel (1), an upper guide rail pair fixedly connected with the panel (1), a bottom plate (2), a lower guide rail pair fixedly connected with the bottom plate (2), a pull rod damper and a spherical hinge connecting piece;
the panel (1) is fixedly connected with a protected structure, and the bottom plate (2) is fixedly connected with the ground or a non-protected structure;
the upper end of the spherical hinge connecting piece is fixedly connected with the upper guide rail pair, and the lower end of the spherical hinge connecting piece is fixedly connected with the lower guide rail pair;
one end of the pull rod damper is hinged with the spherical hinge connecting piece, and the other end of the pull rod damper is hinged with a protected structure, the ground or a non-protected structure;
the spherical hinge connecting piece comprises an upper spherical hinge plate (3), a spherical hinge connecting assembly and a lower spherical hinge plate (4);
the upper spherical hinge plate (3) is fixedly connected with the upper guide rail pair, and the lower spherical hinge plate (4) is fixedly connected with the lower guide rail pair;
the upper spherical hinge plate (3) and the lower spherical hinge plate (4) are fixedly connected through the spherical hinge connecting assembly;
the bottom surface of the upper spherical hinge plate (3) is provided with a spherical groove, and the upper spherical hinge plate (3) is provided with a first counter sink;
the top surface of the lower spherical hinge plate (4) is fixedly provided with a spherical convex block with the same radius as the spherical groove of the upper spherical hinge plate (3), and the convex height of the spherical convex block is greater than the depth of the spherical groove of the upper spherical hinge plate (3);
the lower spherical hinge plate (4) is provided with a second counter bore corresponding to the first counter bore of the upper spherical hinge plate (3);
a middle rubber ring (17) is arranged between the bottom surface of the upper spherical hinge plate (3) and the top surface of the lower spherical hinge plate (4);
the middle rubber ring (17) is concentrically arranged with the first counter sink and the second counter sink, and the thickness of the middle rubber ring (17) is larger than the gap height of the upper spherical hinge plate (3) and the lower spherical hinge plate (4) when the upper spherical hinge plate and the lower spherical hinge plate are placed in parallel;
an upper rubber ring (15) is arranged in a first counter bore of the upper spherical hinge plate (3), and a lower rubber ring (16) is arranged in a second counter bore of the lower spherical hinge plate (4);
the spherical hinge connecting assembly comprises a spherical hinge connecting bolt (13) and a spherical hinge connecting nut (14) which are used for fixedly connecting the upper spherical hinge plate (3) and the lower spherical hinge plate (4);
the spherical hinge connecting bolt (13) and the spherical hinge connecting nut (14) respectively sequentially penetrate through the upper rubber ring (15), a first counter sink on the upper spherical hinge plate (3), the middle rubber ring (17), a second counter sink on the lower spherical hinge plate (4), the lower rubber ring (16) and the spherical hinge connecting nut (14) through the four spherical hinge connecting bolts (13) according to set fastening force;
the pull rod damper comprises an upper pull rod damper (9) and a lower pull rod damper (10);
the upper pull rod damper (9) and the lower pull rod damper (10) both comprise a moving rod end part and a fixed rod end part;
the end part of a moving rod of the upper pull rod damper (9) is hinged with the upper spherical hinge plate (3), and the end part of a fixed rod is hinged with a protected structure;
the end part of a moving rod of the lower pull rod damper (10) is hinged with the lower spherical hinge plate (4), and the end part of a fixed rod is hinged with the ground or a non-protective structure;
an extension spring arranged between the panel (1) and the bottom plate (2);
the extension springs comprise a plurality of upper extension springs (18) and a plurality of lower extension springs (19);
one end of the upper extension spring (18) is connected with the upper spherical hinge plate (3), and the other end of the upper extension spring is connected with the panel (1) or a connecting piece fixed on the panel (1);
one end of the lower extension spring (19) is connected with the lower spherical hinge plate (4), and the other end of the lower extension spring is connected with the bottom plate (2) or a connecting piece fixed on the bottom plate (2);
the panel (1) is fixedly connected with an upper triangular connecting piece (20) through a bolt, a first through hole used for connecting an extension spring is formed in the upper spherical hinge plate (3), one end of the upper extension spring (18) is rotatably connected with the first through hole of the upper spherical hinge plate (3), and the other end of the upper extension spring (18) is fixedly connected with the upper triangular connecting piece (20) through a bolt and a pressing piece;
the four lower extension springs (19) are symmetrically arranged by taking the axis of the lower arc-shaped guide rail (6) as a symmetrical line, and two lower extension springs (19) are respectively arranged at two sides of the lower arc-shaped guide rail (6).
2. A nonlinear horizontal seismic isolation apparatus as recited in claim 1, wherein: the upper guide rail pair comprises an upper arc-shaped guide rail (5) and an upper sliding block (7) which is in sliding connection with the upper arc-shaped guide rail (5);
the lower guide rail pair comprises a lower arc-shaped guide rail (6) and a lower sliding block (8) which is in sliding connection with the lower arc-shaped guide rail (6);
the upper spherical hinge plate (3) is fixedly connected with the upper sliding block (7), and the lower spherical hinge plate (4) is fixedly connected with the lower sliding block (8);
the upper arc-shaped guide rail (5) and the lower arc-shaped guide rail (6) are orthogonally arranged on a horizontal projection plane.
3. A nonlinear horizontal seismic isolation apparatus as claimed in claim 2, wherein: the upper arc-shaped guide rail (5) is arranged to be the highest in the middle of the guide rail, and the lowest in the two ends of the guide rail and equal in height;
the lower arc-shaped guide rail (6) is arranged to be the lowest in the middle of the guide rail, and the highest in the two ends of the guide rail is equal in height.
4. A nonlinear horizontal seismic isolation apparatus as claimed in claim 2, wherein: an upper mounting groove for mounting the upper arc-shaped guide rail (5) is formed in the panel (1), and a lower mounting groove for mounting the lower arc-shaped guide rail (6) is formed in the bottom plate (2);
the upper portion mounting groove is internally provided with an upper portion arc surface which is attached to the upper portion arc guide rail (5), and the lower portion mounting groove is internally provided with a lower portion arc surface which is attached to the lower portion arc guide rail (6).
5. A nonlinear horizontal seismic isolation apparatus as claimed in claim 4, wherein: the upper arc-shaped guide rail (5) is fixedly connected to one diagonal line of the panel (1) in one direction, and the lower arc-shaped guide rail (6) is fixedly connected to the diagonal line of the bottom plate (2) in the other direction.
6. A nonlinear horizontal seismic isolation apparatus as claimed in claim 2, wherein: the slider can be configured as a rolling body slider or a sliding body slider.
7. A nonlinear horizontal seismic isolation apparatus as claimed in any of claims 1 to 6, wherein: the system also comprises a plurality of nonlinear horizontal vibration isolation devices which are fixedly connected into a whole through a connecting member and a panel (1) of the nonlinear horizontal vibration isolation devices;
the number of the nonlinear horizontal seismic isolation devices is at least 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110242941.6A CN113090705B (en) | 2021-03-05 | 2021-03-05 | Nonlinear horizontal shock isolation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110242941.6A CN113090705B (en) | 2021-03-05 | 2021-03-05 | Nonlinear horizontal shock isolation device |
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| CN113090705B true CN113090705B (en) | 2021-12-21 |
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| JP3392036B2 (en) * | 1998-01-20 | 2003-03-31 | 住友建設株式会社 | Sliding support device |
| KR20110140058A (en) * | 2010-06-24 | 2011-12-30 | (주)티이솔루션 | Isolating table system |
| CN105604206A (en) * | 2016-03-29 | 2016-05-25 | 徐志刚 | Slippage seismic isolation pendulum |
| CN110345191B (en) * | 2019-06-03 | 2021-02-02 | 西安航天动力技术研究所 | Universal ball bearing-sliding disc type cultural relic shock isolation device |
| CN110513434B (en) * | 2019-09-20 | 2024-03-12 | 四川省龙丹纳科技有限公司 | Orthogonal guide rail type vibration isolation device and design method thereof |
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