Bidirectional multi-step damping tension-compression support

Abstract

The utility model discloses a two-way multi-step damping tension-compression support, which belongs to the technical field of shock absorption and isolation and comprises an upper displacement box and a lower displacement box, and an upper hook claw is arranged at the edge of the lower end of the upper displacement box; the spherical upper support plate is provided with an upper boss matched with the upper hook claw, sliding displacement exists between the upper hook claw and the upper boss, and the upper hook claw and the upper boss are fixed through a shear pin. The lower support plate and the spherical upper support plate are fixed through an anti-pulling structure, and a lower boss is arranged on the edge of the lower end of the lower support plate. A damping plate spring set is arranged between the upper end of the lower support plate and the lower displacement box, the lower displacement box is provided with a lower hook claw matched with the lower boss, and sliding displacement exists between the lower hook claw and the lower boss. Under the action of wind loads and small earthquakes, the plate spring set provides equivalent horizontal rigidity, the lower displacement box provides small displacement to achieve buffering energy consumption, the shear-resistant pin is shorn in the large earthquake process, the upper displacement box provides large sliding displacement, and earthquake energy is consumed through friction of a sliding interface.

Description

Technical Field

[0001] The utility model belongs to the technical field of seismic isolation and vibration reduction, and particularly relates to a bidirectional multi-stage shock-absorbing tension and compression bearing. Background Art

[0002] In practical applications, shock-absorbing spherical bearings have been widely used in various large-scale building structures, such as bridges, stadiums, high-rise buildings, etc. For example, in the construction of important bridges in some earthquake-prone areas, the application of shock-absorbing spherical bearings has effectively improved the seismic resistance of bridges and ensured the smoothness of traffic lifelines. In high-rise buildings, it can effectively reduce the horizontal displacement of the structure under earthquake action and improve the safety of residence and use.

[0003] The spherical bearing can realize the translation and rotation between the upper structure and the lower structure, and can provide elastic support for the upper structure. The existing shock-absorbing spherical bearing includes: an upper bearing plate, a stainless steel plate I, a planar slide plate I, a spherical crown plate, a spherical slide plate, a lower bearing plate, a displacement box body, a planar slide plate II, a stainless steel plate II, elastic members, etc. Due to the adoption of components such as the upper bearing plate, spherical crown lining plate, displacement box body, and elastic members, the existing shock-absorbing spherical bearing can realize limited rotation and provide elastic support for horizontal translation, thereby reducing the transmission of ground and lower structure vibrations to the upper structure under earthquake action.

[0004] However, shock-absorbing spherical bearings in building structures often need to provide a certain level of stiffness and small displacement under normal use (wind load, temperature change, and minor earthquakes), while providing large slip shock absorption during major earthquakes. However, the existing shock-absorbing spherical bearings do not consider the switching of shock-absorbing methods under normal use and major earthquake actions. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A bidirectional multi-stage shock-absorbing tension and compression bearing, comprising:

[0007] An upper displacement box, with upper hooks provided at the edge of the lower end of the upper displacement box;

[0008] A spherical upper bearing plate, at least part of the spherical upper bearing plate is located inside the upper displacement box, the spherical upper bearing plate is provided with upper convex platforms that cooperate with the upper hooks, and there is a sliding displacement amount between the upper hooks and the upper convex platforms, and the upper hooks and the upper convex platforms are fixed by shear pins;

[0009] A lower bearing plate, the lower bearing plate is arranged at the lower end of the spherical upper bearing plate, the lower bearing plate and the spherical upper bearing plate are fixed by an anti-pulling structure, and lower convex platforms are provided at the edge of the lower end of the lower bearing plate;

[0010] Lower displacement box, the lower displacement box is wrapped outside the lower support plate, a shock-absorbing leaf spring group is arranged between the upper end of the lower support plate and the lower displacement box, the lower displacement box is provided with a lower hook claw that cooperates with the lower boss, and there is a sliding displacement amount between the lower hook claw and the lower boss.

[0011] Further, a spherical upper support plate hole is arranged in the middle of the spherical upper support plate, a first annular groove communicated with the spherical upper support plate hole is arranged above the spherical upper support plate hole, and the size of the first annular groove is larger than that of the spherical upper support plate hole; a lower support plate hole is arranged in the middle of the lower support plate, and the lower end of the lower support plate hole is in a shrinking trend. A second annular groove communicated with the lower support plate hole is arranged below the lower support plate hole, and the size of the second annular groove is larger than that of the lower end of the lower support plate hole. The upper support plate hole and the lower support plate hole are fixed by an anti-pulling structure.

[0012] Further, the anti-pulling structure includes:

[0013] An anti-pulling member, the large head end of the anti-pulling member is located in the first annular groove, and the size of the large head end of the anti-pulling member is smaller than that of the first annular groove. The other end penetrates through the spherical upper support plate hole and extends into the lower support plate hole;

[0014] A reverse anti-loosening bolt, the large head end of the reverse anti-loosening bolt is located in the second annular groove, and the size of the large head end of the reverse anti-loosening bolt is smaller than that of the second annular groove. The other end is connected to the lower end of the anti-pulling member.

[0015] Further, an upper plane friction pair is arranged between the upper displacement box and the upper surface of the spherical upper support plate, a spherical friction pair is arranged between the lower surface of the spherical upper support plate and the upper surface of the lower support plate, and a lower plane friction pair is arranged between the lower surface of the lower support plate and the lower displacement box.

[0016] Further, there is a sliding displacement amount between the shock-absorbing leaf spring group and the inner side surface of the lower support plate.

[0017] The beneficial effects of the present utility model:

[0018] Under the action of wind load and small earthquake, the equivalent horizontal stiffness is provided by the leaf spring group, and a smaller displacement is provided by the lower displacement box to achieve buffering and energy dissipation. The buffering and energy dissipation can avoid large-amplitude deformation of the building in a short time, thereby reducing the influence of wind load and small earthquake on the building and improving the safety of the building. During a large earthquake, the shear pin is sheared off, and the upper displacement box provides a large sliding displacement amount, and the friction of the sliding interface is used to consume seismic energy.

[0019] After the wind load is reduced or a minor earthquake ends, the leaf spring group provides a restoring force to return the bearing to its normal state.

[0020] The utility model has a simple structure, reduces the steel consumption in production, and is convenient to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a two-way multi-stage shock-absorbing tension and compression bearing of the utility model;

[0022] Figure 2 is a schematic top view of the structure of a two-way multi-stage shock-absorbing tension and compression bearing of the utility model.

[0023] In the figure: 1. upper displacement box; 2. upper plane friction pair; 3. spherical upper bearing plate; 4. shear pin; 5. spherical friction pair; 6. shock-absorbing leaf spring group; 7. lower bearing plate; 8. lower displacement box; 9. lower plane friction pair; 10. reverse anti-loosening bolt; 11. uplift prevention part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe the utility model in detail with reference to the drawings and in combination with the embodiments.

[0025] Embodiment 1

[0026] Refer to Figures 1 to 2 , a two-way multi-stage shock-absorbing tension and compression bearing, comprising:

[0027] An upper displacement box 1, with upper hooks provided at the edge of the lower end of the upper displacement box 1;

[0028] A spherical upper bearing plate 3, at least part of the spherical upper bearing plate 3 is located inside the upper displacement box 1. The spherical upper bearing plate 3 is provided with upper convex platforms that cooperate with the upper hooks, and there is a sliding displacement amount between the upper hooks and the upper convex platforms. The upper hooks and the upper convex platforms are fixed by shear pins 4;

[0029] A lower bearing plate 7, the lower bearing plate 7 is arranged at the lower end of the spherical upper bearing plate 3. The lower bearing plate 7 and the spherical upper bearing plate 3 are fixed by an uplift prevention structure. Lower convex platforms are provided at the edge of the lower end of the lower bearing plate 7;

[0030] A lower displacement box 8, the lower displacement box 8 wraps around the outside of the lower bearing plate 7. A shock-absorbing leaf spring group 6 is arranged between the upper end of the lower bearing plate 7 and the lower displacement box 8. The lower displacement box 8 is provided with lower hooks that cooperate with the lower convex platforms, and there is a sliding displacement amount between the lower hooks and the lower convex platforms.

[0031] The spherical surface of the upper spherical bearing plate of the present utility model can realize the rotation function of the bearing under pressure with the spherical slide plate. The inner hole claw can realize the rotation function of the bearing under tension with the anti-pulling member, and the upper plane can realize the large displacement function with the upper displacement box.

[0032] In this embodiment, a single component of the upper spherical bearing plate can realize functions such as pressure force transmission, tensile force transmission, rotation when bearing pressure, rotation when bearing tension, and horizontal sliding, reducing the number of bearing components, simplifying the structure, reducing the steel consumption for production, and facilitating manufacturing.

[0033] The shear pin of the present utility model can realize the conversion of the shock absorption mode of the bearing under normal use and large earthquake actions.

[0034] The shock-absorbing leaf spring group of the present utility model can realize the horizontal equivalent stiffness of the bearing and the restoring force of the bearing, and the form of the leaf spring group can be adjusted according to different usage conditions.

[0035] In this embodiment, a spherical upper bearing plate hole is provided in the middle of the spherical upper bearing plate 3. A first annular groove communicating with the spherical upper bearing plate hole is provided on the upper side of the spherical upper bearing plate hole, and the size of the first annular groove is larger than that of the spherical upper bearing plate hole. A lower bearing plate hole is provided in the middle of the lower bearing plate 7, and the lower end of the lower bearing plate hole shows a shrinking trend. A second annular groove communicating with the lower bearing plate hole is provided on the lower side of the lower bearing plate hole, and the size of the second annular groove is larger than that of the lower end of the lower bearing plate hole. The upper bearing plate hole and the lower bearing plate hole are fixed by an anti-pulling structure.

[0036] In this embodiment, the anti-pulling structure includes:

[0037] An anti-pulling member 11, the large head end of the anti-pulling member 11 is located in the first annular groove, and the size of the large head end of the anti-pulling member 11 is smaller than that of the first annular groove. The other end penetrates through the spherical upper bearing plate hole and extends into the lower bearing plate hole.

[0038] A reverse anti-loosening bolt 10, the large head end of the reverse anti-loosening bolt 10 is located in the second annular groove, and the size of the large head end of the reverse anti-loosening bolt 10 is smaller than that of the second annular groove. The other end is connected to the lower end of the anti-pulling member 11.

[0039] In this embodiment, an upper plane friction pair 2 is provided between the upper surface of the upper displacement box 1 and the upper surface of the spherical upper bearing plate 3. A spherical friction pair 5 is provided between the lower surface of the spherical upper bearing plate 3 and the upper surface of the lower bearing plate 7. A lower plane friction pair 9 is provided between the lower surface of the lower bearing plate 7 and the lower displacement box 8.

[0040] In this embodiment, there is a sliding displacement amount between the shock-absorbing leaf spring group 6 and the inner side surface of the lower bearing plate 7.

[0041] At present, the existing shock-absorbing spherical bearings on the market do not consider the switching of shock-absorbing methods under normal use and major earthquake actions. The bearing can only work in one shock-absorbing mode. Considering the normal use of the bearing, the design parameters of the bearing's seismic isolation and energy dissipation function are reduced.

[0042] During specific implementation, the present utility model adds shear pins and upper and lower displacement boxes, which can realize the separate design of the shock-absorbing function parameters under normal use and major earthquake actions. Under normal use, the equivalent horizontal stiffness is provided by the shock-absorbing leaf spring group 6, and a small displacement is provided by the lower displacement box to achieve buffering and energy dissipation. Buffering and energy dissipation can avoid large deformations of the building in a short period of time. During a major earthquake, the shear pins are cut off, and the upper displacement box provides a large sliding displacement amount. The friction of the sliding interface is used to dissipate seismic energy, so as to achieve buffering and energy dissipation while the bearing provides a certain horizontal bearing capacity under normal use; during a major earthquake, the shear pins are cut off, and the upper displacement box provides a large sliding displacement amount, and the friction of the sliding interface is used to dissipate seismic energy.

[0043] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included within the protection scope of the present utility model.

Claims

1. A bidirectional multi-stage shock-absorbing tension and compression bearing, characterized in that: include: An upper displacement box, wherein an upper hook claw is provided at the edge of the lower end of the upper displacement box; A support plate on the spherical surface, at least a portion of the support plate on the spherical surface is located inside the upper displacement box, the support plate on the spherical surface is provided with an upper boss that cooperates with the upper hook claw, and there is a sliding displacement between the upper hook claw and the upper boss, and the upper hook claw and the upper boss are fixed by a shear pin; A lower support plate, the lower support plate is arranged at the lower end of the support plate on the spherical surface, the lower support plate and the support plate on the spherical surface are fixed by an anti-pull structure, and a lower boss is arranged at the edge of the lower end of the lower support plate; A lower displacement box is wrapped around the outer side of the lower support plate, a shock-absorbing leaf spring group is arranged between the upper end of the lower support plate and the lower displacement box, the lower displacement box is provided with a lower hook claw which is arranged in cooperation with the lower boss, and there is a sliding displacement between the lower hook claw and the lower boss.

2. A bidirectional multi-stage shock-absorbing tension and compression bearing according to claim 1, characterized in that: A spherical support plate hole is provided in the middle of the spherical support plate, and a first annular groove connected with the spherical support plate hole is provided on the upper side of the spherical support plate hole, and the size of the first annular groove is larger than the size of the spherical support plate hole; a lower support plate hole is provided in the middle of the lower support plate, and the lower end of the lower support plate hole tends to shrink, and a second annular groove connected with the lower support plate hole is provided on the lower side of the lower support plate hole, and the size of the second annular groove is larger than the size of the lower end of the lower support plate hole, and the upper support plate hole and the lower support plate hole are fixed by an anti-pull-out structure.

3. The bidirectional multi-stage shock-absorbing tension and compression bearing according to claim 2 is characterized in that: The anti-pullout structure comprises: An anti-pullout member, wherein the large end of the anti-pullout member is located in the first annular groove, and the size of the large end of the anti-pullout member is smaller than the size of the first annular groove, and the other end passes through the support plate hole on the spherical surface and extends into the lower support plate hole; A reverse anti-loosening bolt, wherein the big head end of the reverse anti-loosening bolt is located in the second annular groove, and the size of the big head end of the reverse anti-loosening bolt is smaller than the size of the second annular groove, and the other end is connected to the lower end of the anti-pullout member.

4. The bidirectional multi-stage shock-absorbing tension and compression bearing according to claim 1 is characterized in that: An upper plane friction pair is arranged between the upper displacement box and the upper surface of the spherical support plate, a spherical friction pair is arranged between the lower surface of the spherical support plate and the upper surface of the lower support plate, and a lower plane friction pair is arranged between the lower surface of the lower support plate and the lower displacement box.

5. The bidirectional multi-stage shock-absorbing tension and compression bearing according to claim 1 is characterized in that: There is a sliding displacement between the inner side surfaces of the lower support plate of the shock-absorbing leaf spring group.

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