Thick rubber-lead rubber combined support with vertical limiting function

Abstract

This invention relates to a thick-walled rubber-lead-core rubber composite bearing with vertical limiting function. It includes a thick-walled rubber bearing, a lead-core rubber bearing, a sleeve, and a vertical guide rod. The sleeve is embedded in a hole in the center of the thick-walled rubber bearing, and the vertical guide rod is inserted into the sleeve. The sleeve includes a wide portion and a narrow portion, and the vertical guide rod also includes a wide portion and a narrow portion. Under normal load, the overall vertical stiffness of the composite bearing is the series stiffness of the pure thick-walled rubber bearing and the lead-core rubber bearing. Under horizontal seismic action, the horizontal force between the upper and lower flange plates of the thick-walled rubber bearing is mainly transmitted through the contact between the vertical guide rod and the steel pipe sleeve. When the seismic action is large, resulting in large vertical compressive and tensile deformation of the thick-walled rubber bearing, the vertical guide rod and the sleeve provide contact stiffness. Compared with the prior art, this invention has advantages such as vibration isolation / earthquake protection, simple bearing connection structure for easy production and installation, and prevention of tensile damage and rigid swaying of the device.

Description

Technical Field

[0001] This invention relates to a seismic isolation / vibration bearing structure, and more particularly to a thick-walled rubber-lead-core rubber composite bearing with vertical limiting function. Background Technology

[0002] As a new form of public transportation in cities, subways have greatly improved the efficiency of citizens' daily travel and made a significant contribution to urban economic development. However, due to the vibrations and secondary noise pollution that subways can cause, residents living in buildings above subway stations often face certain health problems, making vibration isolation for these buildings an urgent need. Simultaneously, with the modernization of cities, the faster the functional recovery of buildings and infrastructure after an earthquake has a greater impact on the economy and society, the higher the earthquake risk, and the more stringent the requirements for seismic design of structures. Against this backdrop, the development of vibration-seismic dual-control technology, which can isolate both subway vibrations and noise as well as seismic forces, has gradually become a hot research topic.

[0003] Patent application CN202022731439.5 discloses a combined vibration isolation device with self-resetting function and anti-torsion. The device provides greater tensile and torsional resistance through a damping mechanism. The rubber column and steel plate dissipate the pressure during vibration, achieving a significant vibration isolation effect. At the same time, when the steel plate is compressed, it can convert part of the vertical pressure into horizontal pressure, which is evenly distributed along the surface of the steel plate, thereby offsetting the horizontal pressure and improving the compressive strength of the rubber column, thus enhancing the vibration isolation strength. However, it cannot solve the problem of rigid swaying.

[0004] Patent application CN201710220772.X discloses a three-dimensional seismic isolation and vibration reduction device and its method. It isolates horizontal ground motion through lower rubber supports and vertical vibrations from rail transit through an upper vertical isolation device. The rubber supports have low horizontal stiffness, reducing the transmission of seismic forces to the upper building structure during earthquakes, thus isolating horizontal vibrations. The vertical isolation device uses disc springs with low vertical stiffness, preventing the transmission of vertical vibrations to the upper building structure caused by ground vertical vibration waves from subway operation. Simultaneously, the deformation and recovery process of the disc springs reduces the vertical vibrations on the structure, and frictional resistance consumes some vibration energy. However, it cannot solve the problems of tensile failure and rigid swaying of the device.

[0005] Current research on vibration-isolation dual-control bearings mainly focuses on simple combinations of vertical and horizontal isolation bearings. While existing vibration-isolation dual-control bearings offer good vertical and horizontal isolation performance, as the vertical stiffness of the isolation / vibration layer decreases, or as the structural height and aspect ratio increase, the entire superstructure will exhibit rigid swaying under horizontal seismic loading, increasing the risk of overturning. Furthermore, for seismically isolated buildings with large aspect ratios, the bearings are prone to tension under seismic loading, leading to tensile failure of the isolation bearings and affecting the overall structural safety. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art by providing a thick-walled rubber-lead-core rubber composite support with vertical limiting function to prevent the support from being damaged by tension and rigidly swaying.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A thick-walled rubber-lead-core rubber composite support with vertical limiting function includes a thick-walled rubber support, a lead-core rubber support, and a limiting device.

[0009] The thick-walled rubber support includes a middle thick-walled rubber layer, an upper sealing plate, and a lower sealing plate, which is fixedly connected to the upper structure through the upper sealing plate.

[0010] The lead-core rubber support includes an intermediate laminated steel plate rubber layer, an upper sealing plate, and a lower sealing plate, which is fixedly connected to the upper structure through the upper sealing plate.

[0011] The thick-walled rubber support and the lead-core rubber support are fixed at the top and bottom by fastening them to the sealing plate.

[0012] The limiting device includes a sleeve and a vertical guide rod. The sleeve is embedded in the hole in the middle of the thick rubber support, and the vertical guide rod is inserted into the sleeve.

[0013] The sleeve includes a wide portion and a narrow portion, and the vertical guide rod includes a wide portion and a narrow portion;

[0014] The wide part of the vertical guide rod is fixedly connected to the sealing plate of the thick rubber support, and the wide part of the sleeve is fixedly connected to the other sealing plate of the thick rubber support.

[0015] Furthermore, the width of the wide portion of the vertical guide rod is slightly smaller than the width of the hole in the wide portion of the sleeve, but larger than the width of the hole in the narrow portion of the sleeve, and the width of the narrow portion is slightly smaller than the width of the hole in the narrow portion of the sleeve.

[0016] Furthermore, the gap between the wide end of the vertical guide rod and the wide end of the sleeve satisfies the vertical compression deformation of the support under normal service load.

[0017] Furthermore, the clear distance between the wide end of the vertical guide rod and the narrow end of the sleeve satisfies the vertical tensile deformation of the support under normal service load.

[0018] Furthermore, the upper sealing plate and the lower sealing plate are flange plates;

[0019] Furthermore, the thick-walled rubber support and the lead-core rubber support are connected and fixed at the flange plate position by connecting bolts;

[0020] Furthermore, the sleeve is a steel pipe sleeve;

[0021] Furthermore, a cylindrical hole is made in the middle of the thick rubber support;

[0022] Furthermore, the internal hole of the sleeve is narrower at the top and wider at the bottom, while the vertical guide rod is wider at the bottom and narrower at the top;

[0023] Furthermore, the narrow part of the vertical guide rod is welded and fixed to the sealing plate of the thick rubber support, and the wide part of the sleeve is welded and fixed to another sealing plate of the thick rubber support.

[0024] Furthermore, when the thick rubber bearing is subjected to vertical compression deformation, the end face of the wide part of the vertical guide rod away from the narrow part contacts the end face of the wide part of the sleeve; when the thick rubber bearing is subjected to vertical tension deformation, the cross-section of the wide part of the vertical guide rod near the narrow part contacts one end of the narrow part of the sleeve.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] (1) Under normal use, it can play a role in vibration isolation of the subway; under seismic action, it can play a role in seismic isolation. The overall vertical stiffness of the combined bearing is the series stiffness of the pure thick rubber bearing and the lead core rubber bearing. The stiffness value is relatively small, which can meet the vibration isolation requirements under subway vibration input.

[0027] (2) By constructing vertical guide rods and steel pipe sleeves, the thick rubber bearings can avoid large horizontal deformation and instability under horizontal seismic action.

[0028] (3) By constructing vertical guide rods and steel pipe sleeves, the tensile failure of thick rubber bearings under horizontal seismic action can be avoided.

[0029] (4) By constructing vertical guide rods and steel pipe sleeves, the overall structure can avoid large swaying response under horizontal seismic action. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of a thick-walled rubber-lead-core rubber composite support.

[0031] Figure 2 This is a top view of a thick-walled rubber-lead-core rubber composite support.

[0032] Figure 3 This is a cross-sectional view of the cylindrical hole in the middle of the thick-walled rubber bearing, the steel pipe sleeve, and the vertical guide rod.

[0033] Markings: 1-Thick rubber support; 2-Lead-core rubber support; 3-Steel pipe sleeve; 4-Vertical guide rod; 5-Connecting bolt; 6-1-First upper flange plate; 6-2-First lower flange plate; 6-3-Second upper flange plate; 6-4-Second lower flange plate; 7-Upper structure; 8-Lower structure; A-Vertical guide rod A-side; B-Vertical guide rod B-side; C-Steel pipe sleeve C-side; D-Steel pipe sleeve D-side. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0035] Figure 1 A thick-walled rubber-lead-core rubber composite support with vertical limiting function includes a thick-walled rubber support 1, a lead-core rubber support 2, a steel pipe sleeve 3, and a vertical guide rod 4. The thick-walled rubber support 1 includes an intermediate thick-walled rubber layer and a first upper flange plate 6-1 and a first lower flange plate 6-2 that match the intermediate thick-walled rubber layer. It is fixedly connected to the upper structure 7 through the first upper flange plate 6-1. The lead-core rubber support 2 includes an intermediate laminated steel plate rubber layer and a second upper flange plate 6-3 and a second lower flange plate 6-4 that match the intermediate laminated steel plate rubber layer. It is fixedly connected to the lower structure 8 through the second lower flange plate 6-4. The thick-walled rubber support 1 and the lead-core rubber support 2 are connected and fixedly fixed at the edges of the first lower flange plate 6-2 and the second upper flange plate 6-3 by connecting bolts 5, realizing two... The fastening of the supports: The thick rubber support 1 has a cylindrical hole in the middle, and the steel pipe sleeve 3 is embedded in the cylindrical hole in the middle of the thick rubber support 1. Its lower end is welded and fixed to the lower flange plate 6 of the thick rubber support 1. The vertical guide rod 4 is inserted into the steel pipe sleeve 3. Its upper end is welded and fixed to the first upper flange plate 6-1 of the thick rubber support 1. The vertical guide rod 4 is wider at the bottom and narrower at the top. Its lower width is slightly smaller than the width of the lower hole of the steel pipe sleeve 3 and larger than the width of the upper hole of the steel pipe sleeve 3. Its upper width is slightly smaller than the upper width of the steel pipe sleeve 3. The gap between the lower end of the vertical guide rod 4 and the bottom of the steel pipe sleeve 3 meets the vertical compression deformation of the support under normal service load. The net distance between the wider lower part of the vertical guide rod 4 and the narrower upper hole of the steel pipe sleeve 3 meets the vertical tensile deformation of the support under normal service load.

[0036] Under normal operating loads, there is no contact between the vertical guide rod 4 and the steel pipe sleeve 3. The overall vertical stiffness of the combined support is the series stiffness of the pure thick rubber support and the lead core rubber support. The stiffness value is relatively small, which can meet the vibration isolation requirements under subway vibration input.

[0037] Under horizontal seismic action, the vertical guide rod 4 contacts the side wall of the steel pipe sleeve 3. The horizontal force between the upper and lower flange plates 6 of the thick rubber bearing 1 is mainly transmitted through the contact between the vertical guide rod 4 and the steel pipe sleeve 3. The thick rubber itself does not transmit or only transmits a small part of the horizontal force, thus avoiding instability and failure of the thick rubber. The overall horizontal stiffness of the combined bearing is mainly controlled by the lead-core rubber bearing 2, which can meet the horizontal seismic isolation requirements under earthquake.

[0038] When a large earthquake causes significant vertical compression deformation in the thick rubber bearing 1, the vertical guide rod A surface contacts the steel pipe sleeve C surface, providing contact stiffness and increasing the overall compressive stiffness of the combined bearing. This reduces vertical compression deformation and thus reduces the swaying response of the overall structure under earthquake action.

[0039] When a large earthquake causes significant vertical tensile deformation in the thick rubber bearing, the vertical guide rod B-side contacts the steel pipe sleeve D-side, providing contact stiffness and increasing the overall tensile stiffness of the combined bearing. This reduces vertical tensile deformation and thus reduces the swaying response of the overall structure under earthquake action. At the same time, the vertical tensile force of the thick rubber bearing 1 is mainly borne by the vertical guide rod 4 and the steel pipe sleeve 3, preventing the thick rubber bearing 1 from being damaged by tension.

[0040] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A thick-walled rubber-lead-core rubber composite support with vertical limiting function, characterized in that, Includes thick-walled rubber supports, lead-core rubber supports, and limiting devices; The thick-walled rubber support includes an intermediate thick-walled rubber layer, a first upper sealing plate, and a first lower sealing plate, wherein the first upper sealing plate is fixedly connected to the upper structure. The lead-core rubber support includes an intermediate laminated steel plate rubber layer, a second upper sealing plate, and a second lower sealing plate, with the second lower sealing plate fixedly connected to the lower structure. The limiting device includes a sleeve and a vertical guide rod. The sleeve is embedded in the hole in the middle of the thick rubber support, and the vertical guide rod is inserted into the sleeve. The sleeve includes a wide portion and a narrow portion, and the vertical guide rod includes a wide portion and a narrow portion that match the sleeve; The narrow part of the vertical guide rod is fixedly connected to the first upper sealing plate of the thick-walled rubber support, and the wide part of the sleeve is fixedly connected to the first lower sealing plate of the thick-walled rubber support. The width of the wide part of the vertical guide rod is smaller than the width of the hole in the wide part of the sleeve and larger than the width of the hole in the narrow part of the sleeve; the width of the narrow part of the vertical guide rod is smaller than the width of the hole in the narrow part of the sleeve. The gap between the lower end of the vertical guide rod and the bottom of the sleeve meets the vertical compression deformation of the support under normal service load, and the net distance between the wide part of the lower part of the vertical guide rod and the narrow part of the upper part of the sleeve meets the vertical tensile deformation of the support under normal service load. The thick-walled rubber support and the lead-core rubber support are connected and fixed at the edges of the first lower sealing plate and the second upper sealing plate by connecting bolts. When the thick-walled rubber bearing is deformed vertically under compression, the end face of the wide part of the vertical guide rod away from the narrow part contacts the end face of the wide part of the sleeve. When the thick-walled rubber bearing is deformed vertically under tension, the cross-section of the wide part of the vertical guide rod near the narrow part contacts one end of the narrow part of the sleeve.

2. The thick-walled rubber-lead-core rubber composite support with vertical limiting function according to claim 1, characterized in that, Both the upper and lower sealing plates are flange plates.

3. The thick-walled rubber-lead-core rubber composite support with vertical limiting function according to claim 1, characterized in that, The sleeve is a steel pipe sleeve.

4. A thick-walled rubber-lead-core rubber composite support with vertical limiting function according to claim 1, characterized in that, The hole in the middle of the thick rubber support is cylindrical.

5. A thick-walled rubber-lead-core rubber composite support with vertical limiting function according to claim 1, characterized in that, The internal hole of the sleeve is narrow at the top and wide at the bottom, while the vertical guide rod is wide at the bottom and narrow at the top.

6. A thick-walled rubber-lead-core rubber composite support with vertical limiting function according to claim 1, characterized in that, The narrow part of the vertical guide rod is welded and fixed to the first upper sealing plate, and the wide part of the sleeve is welded and fixed to the first lower sealing plate.

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