A seismic isolation device suitable for a building with a large height-width ratio under a super large earthquake

Abstract

This invention relates to the field of seismic isolation technology in building engineering, specifically to a seismic isolation device suitable for buildings with large height-to-width ratios under mega-earthquakes. The device includes a top rotating bearing, a bottom sliding bearing, and a sector-shaped bearing. The bottom sliding bearing includes a top connecting plate and a bottom connecting plate that can slide relative to each other, a damping system, and a restoring force system. The top rotating bearing includes a top rotating block that rotates relative to each other, a lower rotating block, and a bottom support connected to the top connecting plate. The lower rotating block can slide on the bottom support. The sector-shaped bearing includes a high-damping rubber system connected to the lower rotating block and a sector-shaped bearing bottom support connected to the top connecting plate. The high-damping rubber system and the sector-shaped bearing bottom support form a contact friction pair. This seismic isolation device can simultaneously withstand two horizontal movements and one rotation around the horizontal direction, giving it a large vertical bearing capacity, tensile bearing capacity, and certain rotational performance.

Description

Technical Field

[0001] This invention relates to the field of seismic isolation technology in building engineering, specifically to a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions. Background Technology

[0002] Ordinary laminated rubber seismic isolation bearings, due to their layered rubber and steel plate construction, exhibit high vertical compressive stiffness and low horizontal stiffness after vulcanization, making them suitable for horizontal seismic isolation in ordinary building structures. However, in urban areas, with increasing building heights, applying high-rise seismic isolation technology to such structures in high-intensity seismic zones presents significant challenges. These challenges stem from two main factors: firstly, the high vertical pressure on each bearing; and secondly, the large height-to-width ratio of buildings, especially in northern regions where sunlight requirements necessitate narrower widths and even larger height-to-width ratios. This means that in the event of a rare, high-intensity earthquake, the base bearings of tall buildings inevitably experience tensile forces and rotation around their horizontal axes. Ordinary rubber bearings have limited vertical compressive strength, typically designed to withstand no more than 15 MPa of compressive stress. Furthermore, their key drawback is their low vertical tensile strength, limiting them to only small vertical tensile forces and inability to withstand large-radius deflections. Therefore, they are no longer suitable for seismic isolation in such high-rise buildings. In terms of adapting to seismic isolation in high-rise buildings, the need to provide a special type of bearing with high vertical tensile bearing capacity, large tensile strength, and a certain rotational capacity is an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this patent is to provide a seismic isolation device with a large vertical bearing capacity, a certain degree of tensile bearing capacity, and a certain rotational performance for high-rise building structures with a large height-to-width ratio during horizontal earthquakes.

[0004] This invention achieves this objective through the following technical solution: A seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes includes a top rotating bearing, a bottom sliding bearing, and a sector bearing. The bottom sliding bearing includes a top connecting plate, a bottom connecting plate, a damping system, and a restoring force system. The top connecting plate can slide horizontally relative to the bottom connecting plate. The damping system and the restoring force system are disposed between the top and bottom connecting plates. The top rotating bearing includes a top rotating block, a lower rotating block, and a bottom support. The top rotating block can rotate relative to the lower rotating block. The top of the bottom support has a first arc surface. The lower rotating block can... The sliding mechanism slides on the bottom support platform in a direction perpendicular to the direction in which the top connecting plate slides relative to the bottom connecting plate. The bottom of the bottom support platform is connected to the top connecting plate. The sector-shaped support includes a high-damping rubber system and a sector-shaped support bottom platform. The side of the high-damping rubber system is connected to the top rotating support. The top of the sector-shaped support bottom platform is a second arc surface, and the arc of the second arc surface is consistent with that of the first arc surface. The bottom of the high-damping rubber system is in close contact with the top of the sector-shaped support bottom platform, forming a contact friction pair. The bottom of the sector-shaped support bottom platform is connected to the top connecting plate.

[0005] Furthermore, there are two fan-shaped supports arranged in parallel, respectively located on both sides of the top rotating support.

[0006] Furthermore, the two ends of the bottom support of the fan-shaped support are respectively provided with a stop block.

[0007] Furthermore, the high-damping rubber system includes an upper rubber connecting plate, a lower rubber connecting plate, and a thick-layer damping rubber block. The thick-layer damping rubber block is disposed between the upper rubber connecting plate and the lower rubber connecting plate. The upper rubber connecting plate is connected to the lower rotating block through a lateral connecting plate.

[0008] Furthermore, wedge-shaped plates are provided between the upper rubber connecting plate and the lower rubber connecting plate, located on both sides of the thick-layer damping rubber block.

[0009] Preferably, a polytetrafluoroethylene (PTFE) block is bonded to the bottom of the high-damping rubber system, and the PTFE block is in close contact with the upper surface of the bottom support of the sector-shaped support to form the contact friction pair.

[0010] Furthermore, the restoring force system includes a spring end stop, a horizontal spring, and a spring middle connecting block. The spring end stop is disposed at both ends of the bottom connecting plate, the spring middle connecting block is connected to the lower surface of the top connecting plate, and the horizontal spring is disposed between the spring end stop and the spring middle connecting block.

[0011] Furthermore, the damping system includes a liquid damper tank and a liquid damper baffle disposed on the bottom connecting plate. The liquid damper tank is filled with damping fluid. The top of the liquid damper baffle is connected to the top connecting plate, and the lower part of the liquid damper baffle is inserted into the damping fluid.

[0012] Furthermore, a rigid slide rail is provided on the bottom connecting plate, and a slider adapted to the rigid slide rail is provided on the top connecting plate.

[0013] Furthermore, the lower rotating block is provided with a groove structure, and the lower end of the upper rotating block is located in the groove. The upper rotating block is connected to the lower rotating block by a rotating pin.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0015] 1. The present invention provides a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes, comprising a top rotating support and a bottom sliding support. Both the top rotating support and the bottom sliding support can slide in the horizontal direction, and their sliding directions are perpendicular to each other. The top rotating support can also rotate around the horizontal direction, so that the seismic isolation device can simultaneously bear two horizontal movements and one rotation around the horizontal direction.

[0016] 2. The bottom sliding support of the vibration isolation device of the present invention is equipped with a rigid guide rail system and a restoring force system, which has both a large compressive bearing capacity and a certain tensile bearing capacity in the vertical direction.

[0017] 3. The vibration isolation device of the present invention includes a fan-shaped support comprising a high-damping rubber system. When rotation occurs about the horizontal direction, the high-damping rubber system has not only the function of dissipating rotational energy, but also the function of ultimate buffering.

[0018] 4. The vibration isolation device of the present invention has the characteristics of clear and concise structure, convenient construction and installation, and requires no maintenance throughout the process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the vibration isolation device of the present invention.

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the horizontal rotating support.

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the bottom sliding support.

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the central sector support. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0024] like Figure 1-4 As shown, this embodiment provides a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes, including a top rotating bearing 1, a bottom sliding bearing 2, and a sector-shaped bearing 3; the bottom sliding bearing 2 includes a top connecting plate 21, a bottom connecting plate 28, a damping system, and a restoring force system, the top connecting plate 21 can slide horizontally relative to the bottom connecting plate 28, and the damping system and the restoring force system are disposed between the top connecting plate 21 and the bottom connecting plate 28; the top rotating bearing 1 includes a top rotating block 11, a lower rotating block 12, and a bottom support 15, the top rotating block 11 can rotate relative to the lower rotating block 12, and the top of the bottom support 15 is a first arc surface, The lower rotating block 12 can slide on the bottom support 15, and its sliding direction is perpendicular to the sliding direction of the top connecting plate 21 relative to the bottom connecting plate 28. The bottom of the bottom support 15 is connected to the top connecting plate 21. The sector support 3 includes a high-damping rubber system and a sector support bottom support 37. The side of the high-damping rubber system is connected to the top rotating support 1. The top of the sector support bottom support 37 is a second arc surface, and the arc of the second arc surface is consistent with that of the first arc surface. The bottom of the high-damping rubber system is in close contact with the top of the sector support bottom support 37 to form a contact friction pair. The bottom of the sector support bottom support 37 is connected to the top connecting plate 21.

[0025] This invention provides a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes. When the structure experiences a horizontal earthquake along the sliding direction of the top connecting plate 21, the top rotating support 1 and the sector support 3 remain stationary relative to the top connecting plate 21 of the bottom sliding support 2. The top connecting plate 21, along with the upper mechanism, slides horizontally along the bottom connecting plate 28. At this time, the damping system and the restoring force system of the bottom sliding support 2 also work. The restoring force system is compressed or stretched to generate elastic restoring force, while the damping system generates damping force during the sliding process. When a vertical earthquake occurs... During a horizontal earthquake, the top rotating block 11 and the lower rotating block 12 of the top rotating support 1 slide relative to the bottom platform 15, causing the sector support 3 to slide in a ring. The contact friction generates damping energy dissipation. Due to the curved surface motion, the structure generates a restoring force due to the downward force of gravity during the curved surface motion. When the structure rotates around the horizontal direction, the upper structure will drive the lower rotating block 12 to rotate along the first arc surface of the bottom platform through the top rotating block 11. The contact friction of the sector support 3 generates differential friction damping, and gravity generates a restoring force.

[0026] The present invention relates to a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes. Both the top rotating support 1 and the bottom sliding support 2 can slide in the horizontal direction, and their sliding directions are perpendicular. The top rotating support 1 can also rotate around the horizontal direction, so that the seismic isolation device can simultaneously bear two horizontal movements and one rotation around the horizontal direction. The seismic isolation device of the present invention has the characteristics of clear structure, convenient construction and installation, and no maintenance required throughout the process.

[0027] In order to maintain structural stability and the stability of the operation of this seismic isolation device, the sector-shaped supports 3 are two parallel ones, respectively located on both sides of the top rotating support 1.

[0028] In this embodiment, in order to prevent the high-damping rubber system from sliding off the bottom support 37 of the fan-shaped support, a stop block 38 is provided at each of the two ends of the bottom support 37 of the fan-shaped support.

[0029] The high-damping rubber system includes an upper rubber connecting plate 32, a lower rubber connecting plate 35, and a thick-layer damping rubber block 33. The thick-layer damping rubber block 33 is disposed between the upper rubber connecting plate 32 and the lower rubber connecting plate 35. The upper rubber connecting plate 32 is connected to the lower rotating block 12 through a lateral connecting plate 31. The thick-layer damping rubber block has the functions of horizontal restoring force and damping energy dissipation, and can also mitigate the impact of sudden collisions on the structure.

[0030] Among them, wedge-shaped plates 34 are also provided on both sides of the thick-layer damping rubber block 33 between the upper rubber connecting plate 32 and the lower rubber connecting plate 35. When an earthquake occurs in the horizontal direction where the vertical sliding direction of the top connecting plate 21 is too large, or when the upper structure rotates too much around the horizontal direction, the lower rubber connecting plate 35 will collide with the baffle 38, and the wedge-shaped plates 34 of the sector support 3 will break at the weak point. The thick-layer damping rubber block 33 in the sector support 3 will undergo shear deformation. Due to the use of thick-layer damping rubber, the thick-layer damping rubber block 33 that undergoes shear deformation will generate horizontal restoring force and damping energy dissipation function, and at the same time, it can mitigate the impact of sudden collisions on the structure.

[0031] In this embodiment, a polytetrafluoroethylene block 36 is bonded to the bottom of the high-damping rubber system. The polytetrafluoroethylene block 36 is in close contact with the upper surface of the bottom support 37 of the sector-shaped support, forming the contact friction pair. The polytetrafluoroethylene block 36 and the upper surface of the bottom support 37 of the sector-shaped support easily generate frictional damping, which plays the role of energy dissipation damping.

[0032] The restoring force system includes a spring end stop 22, a horizontal spring 23, and a spring middle connecting block 24. The spring end stop 22 is disposed at both ends of the bottom connecting plate 28. The spring middle connecting block 24 is connected to the lower surface of the top connecting plate 21. The horizontal spring 23 is disposed between the spring end stop 22 and the spring middle connecting block 24. When the top connecting plate 21 slides relative to the bottom connecting plate 28, the horizontal spring 23 will be compressed or stretched, generating an elastic restoring force.

[0033] The damping system includes a liquid damper tank 27 and a liquid damper baffle 26 disposed on a bottom connecting plate 28. The liquid damper tank 27 is filled with damping fluid. The top of the liquid damper baffle 26 is connected to a top connecting plate 21, and the lower part of the liquid damper baffle 26 is inserted into the damping fluid. When the top connecting plate 21 slides relative to the bottom connecting plate 28, the liquid damper baffle 26 slides in the liquid damper tank 27, generating a damping force.

[0034] The bottom connecting plate 28 is provided with a rigid slide rail 25, and the top connecting plate 21 is provided with a slider adapted to the rigid slide rail. The two are connected by a slide rail system. The bottom sliding support 2 uses the rigid slide rail 25 to bear the vertical load, which can bear a large vertical load. At the same time, when an earthquake occurs in the direction perpendicular to the sliding direction of the top rotating support 1, it will generate a long displacement horizontal sliding. The damping system arranged parallel to it will play the function of damping and dissipating energy, thereby reducing the seismic effect in the horizontal direction.

[0035] The lower rotating block 12 is provided with a groove structure, and the lower end of the upper rotating block 11 is located in the groove. The upper rotating block 11 is connected to the lower rotating block 12 through a rotating pin 13. When a rotational earthquake occurs, the structure will rotate around the rotating pin 13. At this time, the top rotating block 11 drives the lower rotating block 12 to rotate along the first arc surface.

[0036] In this embodiment, the installation method of each component is as follows: The top of the bottom support 15 is connected to the bottom of the lower rotating block 12, forming a sliding system. The top rotating block 11 is then wedged into the groove of the lower rotating block 12, and the two are connected together by a rotating pin 13 to form the top rotating support 1.

[0037] First, fix the spring end blocks 22 to both ends of the top surface of the bottom connecting plate 2-8, and fix the spring middle connecting block 24 to the lower surface of the top connecting plate 21. Connect the spring end blocks 22 and the spring middle connecting block 24 in series with a horizontal spring 23 to form the restoring force system of the bottom sliding support 2. Connect the liquid damper tank 27 to the bottom connecting plate 28, and connect the liquid damper baffle 26 to the top connecting plate 21. Fill the liquid damper tank 27 with liquid damping fluid. The liquid damper baffle 26 and the liquid damper tank 27 form the damping system of the bottom sliding support 2, thus forming the bottom sliding support 2.

[0038] The lateral connecting plate 31 is bolted to the side of the lower rotating block 12. The top and bottom of the wedge plate 34 are connected to the upper rubber connecting plate 32 and the lower rubber connecting plate 35, respectively. Similarly, the thick-layer damping rubber block 33 is also connected to the aforementioned two parts. A polytetrafluoroethylene block 36 is bonded to the bottom of the lower rubber connecting plate 35, and the polytetrafluoroethylene block 36 is in close contact with the upper surface of the bottom support platform 37 of the sector-shaped support. The stop block 38 is set at the end of the bottom support platform 37 of the sector-shaped support to form the sector-shaped support 3. Finally, the bottom surface of the bottom support platform 15 and the bottom surface of the bottom support platform 37 of the sector-shaped support are bolted to the top connecting plate 21 of the bottom sliding support 2 to form an integrated vibration isolation device.

[0039] This embodiment describes a seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions. When the structure experiences a horizontal earthquake along the length of the rigid slide rail 25 of the bottom sliding support 2, the top rotating support 1 and the sector support 3 remain stationary relative to the top connecting plate 21 of the bottom sliding support 2. The entire structure moves along the length of the rigid slide rail 25. At this time, the liquid damper baffle 26 and the spring middle connecting block 24 of the bottom sliding support 2 also move accordingly. The horizontal spring 23 is compressed or stretched, generating an elastic restoring force, while the liquid damper baffle 26 slides in the liquid damper tank 27, generating a damping force. Because the horizontal slide rail 2-5 is sufficiently long, the structure can withstand earthquakes of considerable capacity along the length of the horizontal slide rail 2-5.

[0040] When an earthquake occurs in the horizontal direction perpendicular to the length of the rigid slide rail 25 of the bottom sliding support 2, the lower rotating block will slide on the first arc surface, the sector support 3 will slide in a ring, and the polytetrafluoroethylene block 36 will generate damping energy with the upper surface of the bottom platform 37 of the sector support. Due to the curved surface motion, the structure will generate a restoring force due to the downward force of gravity during the curved surface motion. When the structure rotates around the rotating pin 13, the upper structure will drive the lower rotating block 12 to slide along the first arc surface through the top rotating block 11. The polytetrafluoroethylene block 36 will generate frictional damping with the upper surface of the bottom platform 37 of the sector support, and a restoring force will be generated by gravity.

[0041] When an earthquake occurs in the horizontal direction where the length of the vertical and horizontal slide rail 25 is too large, or when the upper structure rotates too much around the rotating pin 13, the rubber lower connecting plate 35 will collide with the baffle 38, the wedge plate 34 of the sector support 3 will break at the weak point, and the thick damping rubber block 33 in the sector support 3 will undergo shear deformation. Due to the use of thick damping rubber, the thick damping rubber block 33 that undergoes shear deformation will generate horizontal restoring force and damping energy dissipation function, and at the same time, it can mitigate the impact of sudden collisions on the structure.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquakes, characterized in that, This includes a top rotating support, a bottom sliding support, and a sector support; The bottom sliding support includes a top connecting plate, a bottom connecting plate, a damping system, and a restoring force system. The top connecting plate can slide horizontally relative to the bottom connecting plate, and the damping system and the restoring force system are disposed between the top connecting plate and the bottom connecting plate. The top rotating support includes a top rotating block, a lower rotating block, and a bottom support. The top rotating block can rotate relative to the lower rotating block. The top of the bottom support is a first arc surface. The lower rotating block can slide on the bottom support, and its sliding direction is perpendicular to the sliding direction of the top connecting plate relative to the bottom connecting plate. The bottom of the bottom support is connected to the top connecting plate. The sector-shaped support includes a high-damping rubber system and a bottom support platform. The side of the high-damping rubber system is connected to the top rotating support. The top of the bottom support platform is a second arc surface, and the arc of the second arc surface is consistent with that of the first arc surface. The bottom of the high-damping rubber system is in close contact with the top of the bottom support platform to form a contact friction pair. The bottom of the bottom support platform is connected to the top connecting plate.

2. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, The sector-shaped supports are two parallel ones, respectively located on both sides of the top rotating support.

3. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, The two ends of the bottom platform of the sector-shaped support are respectively provided with stop blocks.

4. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in any one of claims 1-3, characterized in that, The high-damping rubber system includes an upper rubber connecting plate, a lower rubber connecting plate, and a thick-layer damping rubber block. The thick-layer damping rubber block is disposed between the upper rubber connecting plate and the lower rubber connecting plate. The upper rubber connecting plate is connected to the lower rotating block through a lateral connecting plate.

5. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 4, characterized in that, A wedge-shaped plate is also provided between the upper rubber connecting plate and the lower rubber connecting plate, located on both sides of the thick-layer damping rubber block.

6. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, A polytetrafluoroethylene (PTFE) block is bonded to the bottom of the high-damping rubber system. The PTFE block is in close contact with the upper surface of the bottom support of the fan-shaped support, forming the contact friction pair.

7. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, The restoring force system includes spring end blocks, a horizontal spring, and a spring middle connecting block. The spring end blocks are located at both ends of the bottom connecting plate, the spring middle connecting block is connected to the lower surface of the top connecting plate, and the horizontal spring is located between the spring end blocks and the spring middle connecting block.

8. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1 or 7, characterized in that, The damping system includes a liquid damper tank and a liquid damper baffle mounted on a bottom connecting plate. The liquid damper tank contains damping fluid. The top of the liquid damper baffle is connected to the top connecting plate, and the lower part of the liquid damper baffle is inserted into the damping fluid.

9. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, The bottom connecting plate is provided with a rigid slide rail, and the top connecting plate is provided with a slider that is adapted to the rigid slide rail.

10. The seismic isolation device suitable for buildings with a large height-to-width ratio under mega-earthquake conditions as described in claim 1, characterized in that, The lower rotating block is provided with a groove structure, and the lower end of the upper rotating block is located in the groove. The upper rotating block is connected to the lower rotating block by a rotating pin.

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