Double-order nonlinear damping support
By setting up a horizontal sliding bearing and a horizontal double-order nonlinear damper in parallel in the bearing, the dual energy consumption mechanism of sliding friction and viscous damping is solved, and the problem of excessive displacement under horizontal load and no horizontal stiffness under static force is achieved, effectively controlling and suppressing vibrations is achieved.
Patent Information
- Application Number
- CN202421985270.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-16
AI Technical Summary
The existing support may cause excessive displacement problems under horizontal loads, and the existing technology is difficult to effectively solve when there is no need to provide horizontal stiffness under static action.
A double-order nonlinear damping support, including a horizontal sliding support and a horizontal double-order nonlinear damper, provides a dual energy consumption mechanism to control displacement through the shearing action of the sliding friction pair and viscous damping fluid.
It provides velocity-type viscous damping and sliding friction energy consumption in horizontal direction, and viscous damping coefficients that change with displacement magnitude, avoiding the problem of a surge in damping force and is suitable for vibration control scenarios in civil engineering.
Smart Images
Figure CN222976111U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bearings, and particularly relates to a two-stage non-linear damping bearing. Background Art
[0002] Steel bearings for building structures are widely used in the field of civil engineering, including fixed hinge bearings, tensile hinge bearings, single-direction sliding bearings, two-direction sliding bearings, and elastic bearings, etc. Among them, the fixed hinge bearing can bear the three-direction forces transmitted from the upper structure and release rotation, without providing the three-direction translational deformation ability. The tensile hinge bearing, compared with the ordinary fixed hinge bearing, can provide vertical tensile ability and is provided with tensile teeth structure. The single-direction sliding bearing and the two-direction sliding bearing provide the horizontal movement ability on the basis of the fixed hinge bearing, and are generally applied to large-span floor structures that need to consider temperature deformation and are also widely used in the corridor design of multi-body structures. The elastic bearing is internally provided with leaf springs, which can provide horizontal single-direction or two-direction stiffness and deformation ability, and can be applied to the situation where temperature deformation or seismic action needs to be considered, and its stiffness design is beneficial to controlling displacement. Among the bearings that can provide deformation ability, if only the sliding mechanism is adopted, due to the generally small friction coefficient and low restraint effect, the problem of excessive displacement may occur under the action of horizontal loads. At the same time, in some cases, it is not necessary for the bearing to provide horizontal stiffness under static action. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a two-stage non-linear damping bearing that dissipates energy by using velocity damping in the horizontal direction.
[0004] To solve the above technical problem, the technical solution adopted by the utility model is: it includes an upper seat plate and a lower seat plate, and a horizontal sliding bearing and a horizontal two-stage non-linear damper are arranged in parallel between the upper seat plate and the lower seat plate;
[0005] The horizontal sliding bearing includes a spherical plate and a bearing main body. The bottom surface of the upper seat plate is provided with L-shaped tensile teeth matching the bearing main body. An upper-plane sliding friction pair is arranged between the upper seat plate and the spherical plate. A spherical-surface rotation friction pair is arranged between the spherical plate and the bearing main body. A lower-plane sliding friction pair is arranged between the bearing main body and the lower seat plate. The top surface of the lower seat plate is provided with an L-shaped horizontal limiting plate matching the bearing main body;
[0006] The horizontal two-stage non-linear damper includes a damping plate connected to the upper seat plate and a non-linear damping groove connected to the lower seat plate. The damping plate is strip-shaped. The non-linear damping groove is provided with a strip-shaped slot matching the damping plate. The cross-section of the strip-shaped slot of the non-linear damping groove is a variable cross-section with a smaller middle and larger ends. The strip-shaped slot of the non-linear damping groove is filled with viscous damping fluid.
[0007] Its additional technical features are as follows: the horizontal two-stage nonlinear damper is arranged longitudinally, or transversely, or longitudinally and transversely at the same time, and the setting of the L-shaped horizontal limit plate matches the setting of the horizontal two-stage nonlinear damper;
[0008] The horizontal two-stage nonlinear damper is arranged singly or multiple in parallel in the same direction.
[0009] A two-stage nonlinear damping bearing provided by the present utility model is provided with a horizontal sliding bearing and a horizontal two-stage nonlinear damper between an upper seat plate and a lower seat plate, and the horizontal sliding bearing and the horizontal two-stage nonlinear damper are in a parallel connection relationship. During use, the bearing body of the horizontal sliding bearing bears the vertical load transmitted from the upper structure. The spherical surface rotational friction pair provided between the spherical plate and the bearing body provides a certain rotational ability and releases the bending moment in the rotational direction. The L-shaped horizontal limit plate can limit the moving direction of the bearing body relative to the lower seat plate. Under the action of an external horizontal load, the bearing body slides along the L-shaped horizontal limit plate, and the upper-plane sliding friction pair between the upper seat plate and the spherical plate and the lower-plane sliding friction pair between the bearing body and the lower seat plate perform friction energy dissipation. At the same time, the horizontal two-stage nonlinear damper performs viscous damping energy dissipation. The long strip-shaped holes of the nonlinear damping groove are filled with viscous damping fluid, and the horizontal viscous damping force is provided through the shearing action of the damping plate and the damping fluid, and the nonlinear damping force along the direction of the damping plate can be provided. Under the action of small displacements, the gap between the damping plate and the nonlinear damping groove is small, and the damping coefficient is large, and it can participate in energy dissipation in time. At this time, the viscous damping energy dissipation part should be greater than the sliding friction energy dissipation part. When the displacement gradually increases and is under the action of large displacements, at this time, the gap between the damping plate and the nonlinear damping groove increases, and the damping coefficient decreases. At this time, the viscous damping energy dissipation part is less than the sliding friction energy dissipation part. The horizontal two-stage nonlinear damper embodies the two-stage characteristic. According to needs, the horizontal two-stage nonlinear damper is arranged longitudinally, or transversely, or longitudinally and transversely at the same time, the setting of the L-shaped horizontal limit plate matches the setting of the horizontal two-stage nonlinear damper, and the horizontal two-stage nonlinear damper is arranged singly or multiple in parallel in the same direction. When the horizontal sliding bearing needs to slide bidirectionally, the horizontal two-stage nonlinear damper also needs to be arranged bidirectionally.
[0010] A two-stage nonlinear damping bearing provided by the present utility model can provide velocity-type viscous damping in the horizontal direction. Combining with the friction energy dissipation at the sliding friction pair, the double energy dissipation mechanism can increase the energy dissipation effect. A two-stage nonlinear damping bearing provided by the present utility model provides a viscous damping coefficient that changes with the displacement size. The viscous damping energy dissipation function can be exerted at small displacements, and at large displacements, the problem of possible sudden increase in damping force is avoided. A two-stage nonlinear damping bearing provided by the present utility model is applicable to various vibration control scenarios in civil engineering, mainly including the connecting corridor bearings in connected structures, large-span steel roofs, etc. Description of the Drawings
[0011] Figure 1 Structural schematic diagram of a two - stage non - linear damping bearing of the present utility model;
[0012] Figure 2 Cross - sectional view of a horizontal two - stage non - linear damper. Specific embodiments
[0013] The following further details the specific structure of a two - stage non - linear damping bearing of the present utility model with reference to the accompanying drawings.
[0014] As Figure 1 shown, a two - stage non - linear damping bearing of the present utility model includes an upper seat plate 1 and a lower seat plate 2. A horizontal sliding bearing 3 and a horizontal two - stage non - linear damper 4 are arranged in parallel between the upper seat plate 1 and the lower seat plate 2. The horizontal sliding bearing 3 includes a spherical plate 5 and a bearing main body 6. An L - shaped tensile tooth 7 matching the bearing main body 6 is arranged on the bottom surface of the upper seat plate 1. An upper - plane sliding friction pair 8 is arranged between the upper seat plate 1 and the spherical plate 5. A spherical - surface rotational friction pair 9 is arranged between the spherical plate 5 and the bearing main body 6. A lower - plane sliding friction pair 10 is arranged between the bearing main body 6 and the lower seat plate 2. An L - shaped horizontal limiting plate 11 matching the bearing main body 6 is arranged on the top surface of the lower seat plate 2. The horizontal two - stage non - linear damper 4 includes a damping plate 12 connected to the upper seat plate 1 and a non - linear damping groove 13 connected to the lower seat plate 2. The horizontal two - stage non - linear damper 4 and the L - shaped horizontal limiting plate 11 are arranged longitudinally.
[0015] As Figure 2 shown, the damping plate 12 is strip - shaped. The non - linear damping groove 13 is provided with a strip - shaped slot 14 matching the damping plate 12. The cross - section of the strip - shaped slot 14 of the non - linear damping groove 13 is a variable cross - section with a smaller middle and larger ends. The strip - shaped slot 14 of the non - linear damping groove 13 is filled with viscous damping fluid.
[0016] A double - stage non - linear damping bearing provided by the utility model, a horizontal sliding bearing 3 and a horizontal double - stage non - linear damper 4 are arranged between an upper seat plate 1 and a lower seat plate 2, and the horizontal sliding bearing 3 and the horizontal double - stage non - linear damper 4 are in a parallel connection relationship. During use, the bearing body 6 of the horizontal sliding bearing 3 bears the vertical load transmitted from the upper structure. The spherical surface rotational friction pair 9 arranged between the spherical plate 5 and the bearing body 6 provides a certain rotational ability and releases the bending moment in the rotational direction. The L - shaped horizontal limit plate 11 can limit the moving direction of the bearing body 6 relative to the lower bearing plate 2. Under the action of an external horizontal load, the bearing body 6 slides along the L - shaped horizontal limit plate 11, and the upper - plane sliding friction pair 8 between the upper seat plate 1 and the spherical plate 5 and the lower - plane sliding friction pair 10 between the bearing body 6 and the lower seat plate 2 dissipate energy through friction. At the same time, the horizontal double - stage non - linear damper 4 dissipates energy through viscous damping. The long - strip slot 14 of the non - linear damping slot 13 is filled with viscous damping fluid, and a horizontal viscous damping force is provided through the shearing action of the damping plate 12 and the damping fluid, and a non - linear damping force along the direction of the damping plate 12 can be provided. Under small - displacement action, the gap between the damping plate 12 and the non - linear damping slot 13 is small, and the damping coefficient is large, and it can participate in energy dissipation in time. At this time, the viscous - damping energy - dissipation part should be greater than the sliding - friction energy - dissipation part. When the displacement gradually increases, under large - displacement action, at this time the gap between the damping plate 12 and the non - linear damping slot 13 increases, and the damping coefficient decreases. At this time, the viscous - damping energy - dissipation part is less than the sliding - friction energy - dissipation part. The horizontal double - stage non - linear damper 4 exhibits double - stage characteristics. According to needs, the horizontal double - stage non - linear damper 4 is arranged longitudinally or transversely or longitudinally and transversely at the same time. The setting of the L - shaped horizontal limit plate 11 matches the setting of the horizontal double - stage non - linear damper 4. The horizontal double - stage non - linear damper 4 is arranged singly or multiple in the same direction side by side. When the horizontal sliding bearing 3 needs to slide bidirectionally, the horizontal double - stage non - linear damper 4 also needs to be arranged bidirectionally.
[0017] A double - stage non - linear damping bearing provided by the utility model is not limited to the above - mentioned structure. As long as various improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A double-order nonlinear damping support, comprising an upper seat plate and a lower seat plate, characterized in that: A horizontal sliding support and a horizontal double-order nonlinear damper are arranged in parallel between the upper seat plate and the lower seat plate; The horizontal sliding support comprises a spherical plate and a support body, the bottom surface of the upper seat plate is provided with L-shaped anti-tension teeth matching the support body, an upper plane sliding friction pair is provided between the upper seat plate and the spherical plate, a spherical rotating friction pair is provided between the spherical plate and the support body, a lower plane sliding friction pair is provided between the support body and the lower seat plate, and an L-shaped horizontal limit plate matching the support body is provided on the top surface of the lower seat plate; The horizontal double-order nonlinear damper comprises a damping plate connected to an upper seat plate and a nonlinear damping groove connected to a lower seat plate. The damping plate is in an elongated strip shape. The nonlinear damping groove is provided with an elongated slot hole matching the damping plate. The cross section of the elongated slot hole of the nonlinear damping groove is a variable cross section that is small in the middle and large at both ends. The elongated slot hole of the nonlinear damping groove is filled with viscous damping fluid.
2. A double-order nonlinear damping support according to claim 1, characterized in that: The horizontal double-order nonlinear damper is arranged longitudinally or transversely or both longitudinally and transversely, and the arrangement of the L-shaped horizontal limit plate matches the arrangement of the horizontal double-order nonlinear damper.
3. A double-order nonlinear damping support according to claim 1 or 2, characterized in that: The horizontal double-order nonlinear damper is arranged singly or in parallel in the same direction.