A three-dimensional seismic isolation device with strong static pressure bearing capacity

Abstract

The present invention relates to technical fields such as construction engineering, bridge engineering and equipment engineering, and specifically to a three-dimensional seismic isolation device with strong static pressure bearing capacity, including a horizontal two-dimensional seismic isolation support and a vertical seismic isolation support, the vertical seismic isolation support including an upper cylinder, a lower cylinder sleeved in the upper cylinder, a load-bearing rubber support and an annular seismic isolation support, the load-bearing rubber support is installed on the inner bottom of the lower cylinder, an intermediate cylinder is provided in the upper cylinder, the annular seismic isolation support is installed on the upper part of the load-bearing rubber support, the inner wall of the annular seismic isolation support is in close contact with the intermediate cylinder, and the outer wall of the annular seismic isolation support is in close contact with the inner wall of the lower cylinder. When a vertical earthquake occurs in the seismic isolation device of the present invention, the vertical annular seismic isolation support undergoes shear deformation between the lower cylinder and the central cylinder of the upper cylinder, effectively reducing the vertical earthquake effect; its horizontal seismic isolation support and vertical seismic isolation support are independent of each other, and can respectively play the role of reducing horizontal earthquakes and vertical earthquakes.

Description

Technical Field

[0001] The present invention relates to the technical fields of construction engineering, bridge engineering and equipment engineering, and in particular to a three-dimensional seismic isolation device with strong static pressure bearing capacity. Background Art

[0002] Conventional seismic isolation rubber bearings play an important role in mitigating damage to buildings and bridge structures caused by horizontal earthquakes. Their excellent horizontal deformation capacity and energy dissipation make them effective in isolating buildings and bridges, effectively preventing damage from horizontal earthquakes. They have been well-tested in recent earthquakes. However, a major drawback of conventional rubber isolation bearings is their lack of vertical shock absorption. Seismic records from major earthquakes show that vertical earthquakes contribute significantly to the total seismic energy. Solving this problem has long been a major challenge for the isolation community, particularly for critical buildings, bridges, and other equipment. For effective vertical isolation, low vertical dynamic stiffness is required. However, the greater weight of the bearings generally requires a higher vertical static load-bearing capacity (i.e., a higher initial static stiffness) for safety reasons. This presents a rather contradictory concept, and resolving this issue has become a key bottleneck in the development of three-dimensional seismic isolation devices. Summary of the Invention

[0003] The object of the present invention is to provide a three-dimensional seismic isolation device with a strong initial static pressure bearing capacity, which can play a shock-absorbing role when both horizontal and vertical earthquakes occur.

[0004] The present invention achieves this object through the following technical solutions:

[0005] A three-dimensional seismic isolation device with strong static pressure bearing capacity includes a horizontal two-dimensional seismic isolation support and a vertical seismic isolation support arranged in series with each other, the vertical seismic isolation support includes an upper cylinder, a lower cylinder, a load-bearing rubber support and an annular seismic isolation support, the lower cylinder is sleeved in the upper cylinder, the load-bearing rubber support is installed on the inner bottom of the lower cylinder, an intermediate cylinder is provided in the upper cylinder, the annular seismic isolation support is installed on the upper part of the load-bearing rubber support, the inner wall of the annular seismic isolation support is in close contact with the intermediate cylinder, and the outer wall of the annular seismic isolation support is in close contact with the inner wall of the lower cylinder.

[0006] Furthermore, the annular seismic isolation support includes an inner rubber layer, an outer rubber layer, and a steel plate arranged between the inner rubber layer and the outer rubber layer.

[0007] Furthermore, the annular seismic isolation support also includes a horizontal lead core.

[0008] Furthermore, the load-bearing rubber support includes a top rubber member, a bottom rubber member, and a middle steel plate disposed therebetween.

[0009] Furthermore, the load-bearing rubber support is provided with a through hole, and a spring is embedded in the through hole.

[0010] Preferably, the spring is a memory alloy spring.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The three-dimensional seismic isolation device with strong static pressure bearing capacity of the present invention has horizontal seismic isolation supports and vertical seismic isolation supports that are independent of each other and not coupled to each other, and can respectively play the role of reducing horizontal earthquakes and vertical earthquakes.

[0013] 2. When no earthquake occurs, the vertical load of the upper isolation structure of the seismic isolation device of the present invention is transmitted to the vertical isolation support of the lower layer through the upper horizontal two-dimensional isolation support, and finally transmitted to the lower fixed ground. Since the vertical load-bearing rubber support in the vertical isolation support is arranged in the closed lower cylinder and is constrained by the cylinder, it has a larger vertical static stiffness and a larger vertical static initial bearing capacity under the constraint of the cylinder, thereby improving the vertical static bearing capacity of the device; when a vertical earthquake occurs, the upper horizontal two-dimensional isolation support has a larger vertical stiffness, and the vertical annular isolation support in the vertical isolation support of the lower layer has a smaller vertical stiffness, and the vertical annular isolation support undergoes shear deformation between the lower cylinder and the central cylinder of the upper cylinder, thereby effectively reducing the vertical earthquake effect.

[0014] 3. The seismic isolation device of the present invention can be manufactured as a complete set, is easy to use, and requires no maintenance during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the three-dimensional seismic isolation device of the present invention.

[0016] Figure 2 for Figure 1 Schematic diagram of the structure of the horizontal seismic isolation bearing.

[0017] Figure 3 for Figure 1 Schematic diagram of the structure of the vertical seismic isolation bearing

[0018] Figure 4 for Figure 3 Cross-sectional view of the vertical seismic isolation bearing.

[0019] Figure 5 for Figure 4 Schematic diagram of the structure of the middle annular seismic isolation bearing.

[0020] Figure 6 for Figure 4 Schematic diagram of the structure of the medium-load rubber bearing. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1.

[0023] like Figure 1-6 As shown, this embodiment provides a three-dimensional seismic isolation device with strong static pressure bearing capacity, including a horizontal two-dimensional seismic isolation bearing 1 and a vertical seismic isolation bearing 2 arranged in series with each other, the vertical seismic isolation bearing 2 includes an upper cylinder 21, a lower cylinder 25, a load-bearing rubber bearing 23 and an annular seismic isolation bearing 22, the lower cylinder 25 is sleeved in the upper cylinder 21, the load-bearing rubber bearing 23 is installed on the inner bottom of the lower cylinder 25, an intermediate cylinder 211 is provided in the upper cylinder 21, the annular seismic isolation bearing 22 is installed on the upper part of the load-bearing rubber bearing 23, the inner wall of the annular seismic isolation bearing 22 is in close contact with the intermediate cylinder 211, and the outer wall of the annular seismic isolation bearing 22 is in close contact with the inner wall of the lower cylinder 25.

[0024] When there is no earthquake, the vertical load of the upper isolation structure of the three-dimensional isolation device with strong static pressure bearing capacity of the present invention will be transmitted to the vertical isolation support 2 of the lower layer through the upper horizontal two-dimensional isolation support 1 of the device, and finally transmitted to the lower fixed ground; because the vertical load-bearing rubber support 23 in the vertical isolation support 2 is constrained by the outer periphery of the lower cylinder 25, the vertical load-bearing rubber support 23 has a large vertical static load-bearing capacity; when a horizontal earthquake occurs, the upper horizontal two-dimensional isolation support 1 of the device will be sheared in the horizontal direction. Shear deformation occurs, while the vertical seismic isolation bearing 2 in the lower layer does not move. The former consumes seismic energy and plays a role in reducing horizontal earthquakes. When a vertical earthquake occurs, the upper horizontal two-dimensional seismic isolation bearing 1 has a larger vertical stiffness, and the vertical annular seismic isolation bearing 22 in the vertical seismic isolation bearing 2 in the lower layer has a smaller vertical stiffness. The vertical annular seismic isolation bearing 22 undergoes shear deformation between the lower cylinder 25 and the middle cylinder 211 of the upper cylinder 21, which can effectively reduce the vertical seismic effect. The device can be manufactured as a complete set, is simple to use, and requires no maintenance during operation.

[0025] The annular seismic isolation support 22 includes an inner rubber layer 223, an outer rubber layer 221 and a steel plate 222 arranged between the inner rubber layer 223 and the outer rubber layer 221. The annular seismic isolation support 22 adopts a sandwich rubber technology with a steel plate arranged in the middle, which can significantly improve the seismic resistance.

[0026] The annular seismic isolation support 22 further includes a horizontal lead core, which can effectively reduce vertical seismic effects.

[0027] Among them, the load-bearing rubber bearing 23 includes a top rubber 231 and a bottom rubber 233 and an intermediate steel plate 232 arranged therebetween. The vertical load-bearing rubber bearing 2-3 adopts a sandwich rubber technology with an inner steel plate arranged in the middle, which significantly improves the vertical static load-bearing capacity of the vertical load-bearing rubber bearing 23.

[0028] Among them, a through hole 234 is provided on the load-bearing rubber support 23, and a spring 24 is embedded in the through hole. The spring 24 is a memory alloy spring. The setting of the memory alloy spring 24 can, on the one hand, further improve the vertical static bearing capacity of the device. On the other hand, after the vertical earthquake ends, the memory alloy spring 24 has a memory function and will return to its original position within a certain period of time, so that the upper seismic isolation structure will be restored to its original position in the vertical direction as a whole.

[0029] The specific installation steps of the three-dimensional seismic isolation device with strong static pressure bearing capacity in this embodiment are as follows: first, put the memory alloy spring 24 into the through hole of the vertical bearing rubber support 23, and then put the whole combination of the two into the lower cylinder 25 of the vertical seismic isolation support 2. In the middle; the vertical annular seismic isolation support 22 is placed in the lower cylinder 25, and the lower bottom surface of the vertical annular seismic isolation support 22 is in close contact with the vertical load-bearing rubber support 23; the upper cylinder 21 of the vertical seismic isolation support 2 is placed, and the bottom of the center tube of the upper cylinder 21 is in close contact with the top of the vertical load-bearing rubber support 23, and the outer layer rubber 221 of the vertical annular seismic isolation support 22 is tightly bonded to the inner wall of the lower cylinder 25, and the inner layer rubber 223 of the annular seismic isolation support 22 is tightly bonded to the outer wall of the center tube of the upper cylinder 21; the top and bottom surfaces of the rubber support body 12 of the horizontal two-dimensional seismic isolation support 1 are respectively connected with the upper connecting plate 11 and the lower connecting plate 13 by bolts to form a horizontal two-dimensional seismic isolation support 1 as a whole; the lower connecting plate 13 of the horizontal two-dimensional seismic isolation support 1 is bolted to the top plate of the upper cylinder 21 of the vertical seismic isolation support 2, that is, a three-dimensional seismic isolation device with a large static pressure bearing capacity in this embodiment is formed.

[0030] Those skilled in the art will understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the present disclosure (including the claims) to these examples. Within the spirit of the present invention, the technical features of the above embodiments or different embodiments may be combined, and there are many other variations of the various aspects of the present invention described above, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A three-dimensional seismic isolation device with strong static pressure bearing capacity, characterized in that: It includes a horizontal two-dimensional seismic isolation bearing and a vertical seismic isolation bearing arranged in series with each other. The vertical seismic isolation bearing includes an upper cylinder, a lower cylinder, a load-bearing rubber bearing and an annular seismic isolation bearing. The lower cylinder is sleeved in the upper cylinder, the load-bearing rubber bearing is installed at the inner bottom of the lower cylinder, an intermediate cylinder is provided in the upper cylinder, and the annular seismic isolation bearing is installed on the upper part of the load-bearing rubber bearing. The inner wall of the annular seismic isolation bearing is in close contact with the intermediate cylinder, and the outer wall of the annular seismic isolation bearing is in close contact with the inner wall of the lower cylinder.

2. The three-dimensional seismic isolation device with strong static pressure bearing capacity according to claim 1, characterized in that: The annular seismic isolation support comprises an inner rubber layer, an outer rubber layer and a steel plate arranged between the inner rubber layer and the outer rubber layer.

3. The three-dimensional seismic isolation device with strong static pressure bearing capacity according to claim 2, characterized in that: The annular seismic isolation support further includes a horizontal lead core.

4. The three-dimensional seismic isolation device with strong static pressure bearing capacity according to claim 1, characterized in that: The load-bearing rubber support includes a top rubber, a bottom rubber and an intermediate steel plate arranged therebetween.

5. The three-dimensional seismic isolation device with strong static pressure bearing capacity according to claim 4, characterized in that: The load-bearing rubber support is provided with a through hole, and a spring is embedded in the through hole.

6. The three-dimensional seismic isolation device with strong static pressure bearing capacity according to claim 5, characterized in that: The spring is a memory alloy spring.

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