A seismic isolation rubber bearing flexible fire protection structure and its construction technology

Abstract

The present invention discloses a flexible fireproof protection structure of a seismic isolation rubber bearing, wherein upper and lower flange plates are provided between the seismic isolation rubber bearing and the upper and lower piers, and flexible fireproof and heat-insulating materials are filled on the periphery of the rubber bearing and between the upper and lower flange plates, and upper and lower aerogel felts are attached to the joints between the upper and lower flange plates and the flexible fireproof and heat-insulating materials, and a composite flexible fireproof and heat-insulating layer composed of multiple overlapping and mutually independent flexible fireproof and heat-insulating layers is provided from the outer surface between the upper and lower aerogel felts to the edges of the upper and lower piers, and is fixed with self-drilling screws, steel plates and high-temperature resistant steel wire ropes. The protective structure of the present invention can move with the movement of the rubber bearing, so that it is always wrapped in the protective structure, playing a role of fireproofing and heat insulation. Moreover, the thickness of the protective layer is small, and it does not affect other structures in the building. In addition, compared with the fireproof board, the cost is lower and it is suitable for large-area use; the design of each connection part in the present invention is unique, which is convenient for construction, later maintenance and disassembly.

Description

Technical Field

[0001] The invention relates to a fire protection structure, in particular to a flexible fire protection structure of a seismic isolation rubber bearing and a construction process thereof. Background Art

[0002] Building seismic isolation rubber bearings are products made of multiple layers of rubber and multiple layers of steel plates or other materials stacked alternately. As building seismic isolation technology becomes more and more mature, more and more buildings use seismic isolation rubber bearings. Seismic isolation bearings are generally arranged between the upper and lower piers of the building. As a part of the middle of the load-bearing components, when an earthquake occurs, the seismic energy input to the upper structure is reduced to avoid structural collapse.

[0003] According to the provisions of the Code for Fire Protection Design of Buildings (GB50016-2014) for civil buildings, the fire resistance limit of the column components with a fire resistance grade of one shall not be less than 3 hours. The seismic isolation rubber bearing is located between the upper and lower piers and should also be designed according to the fire protection requirements of the column. Its fire resistance limit should also meet the requirement of a fire resistance limit of not less than 3 hours. Since rubber is a flammable item, when a fire occurs in the seismic isolation rubber bearing, the rubber will gradually degrade as the temperature rises, and a gap will be generated between the rubber and the steel plate due to the failure of the bonding. Air will penetrate through the gap and cause more intense combustion. At the same time, the rubber and the steel plate will slide in layers under pressure, resulting in the continuous loss of bearing performance and eventually the loss of bearing capacity, leading to serious consequences such as the collapse of the building. Studies have shown that the fire resistance limit of the seismic isolation rubber bearing is only 82 minutes, which is still far from the fire protection design requirement of a fire resistance limit of 3 hours.

[0004] In recent years, with the development of my country's economy, the development of building seismic isolation technology and the improvement of construction technology, building seismic isolation bearings have been widely used, but the seismic isolation bearings that have been used in my country have not or rarely taken fire protection measures. However, building seismic isolation bearings are mostly used in densely populated places, such as hospitals, airports, etc. Once a fire occurs, the seismic isolation rubber bearings lose their bearing capacity, and the consequences are disastrous.

[0005] The fire protection structure of the seismic isolation rubber bearing should first ensure that it does not lose its bearing capacity in a fire, avoid structural collapse, and buy time for personnel evacuation. Secondly, the fire protection structure should be able to move with the movement of the seismic isolation rubber bearing, reduce performance loss in small and medium earthquakes, and be maintainable. Summary of the invention

[0006] In response to the above-mentioned prior art, the present invention proposes a flexible fire protection structure for a seismic isolation rubber bearing. Under the ISO834 international standard heating curve, the seismic isolation rubber bearing using the fire protection structure has a fire resistance time of 3 hours and meets the fire protection method for large displacement of the seismic isolation bearing under earthquake conditions. At the same time, the protective layer has a small thickness, and the installation is convenient and economical.

[0007] In order to solve the above technical problems, the present invention proposes a seismic isolation rubber bearing flexible fire protection structure, wherein an upper flange plate is provided between the seismic isolation rubber bearing and the upper pier, and a lower flange plate is provided between the seismic isolation rubber bearing and the lower pier, the height of the seismic isolation rubber bearing is H1, and a flexible fireproof and thermal insulation material is filled on the periphery of the seismic isolation rubber bearing and between the upper flange plate and the lower flange plate, and the outer surfaces of the upper flange plate, the lower flange plate and the flexible fireproof and thermal insulation material are the same; an upper aerogel felt is bonded to the joint between the upper flange plate and the outer surface of the flexible fireproof and thermal insulation material, and a lower aerogel felt is bonded to the joint between the lower flange plate and the outer surface of the flexible fireproof and thermal insulation material; the upper aerogel felt and the thickness of the lower aerogel felt are both W1; a composite flexible fireproof insulation layer is provided on the surface of the flexible fireproof insulation material between the upper aerogel felt and the lower aerogel felt, and the composite flexible fireproof insulation layer is composed of multiple layers of overlapping and independent flexible fireproof insulation layers; a plurality of self-drilling screws are passed through the composite flexible fireproof insulation layer to the flexible fireproof insulation material for fastening, and the plurality of self-drilling screws are evenly distributed along the circumferential direction; the composite flexible fireproof insulation layer is provided with an upper outer edge and a lower outer edge respectively covering the edges of the upper pier and the lower pier, a circle of steel plate with an L-shaped cross-section is fastened at the corner of the upper outer edge by a plurality of expansion bolts, and a high-temperature resistant steel wire rope is fastened around the periphery of the composite flexible fireproof insulation layer.

[0008] Furthermore, in the flexible fire protection structure of the seismic isolation rubber bearing described in the present invention, the height of the upper aerogel felt is from the lower surface of the upper pier downward to H2, and the height of the lower aerogel felt is from the upper surface of the lower pier upward to H2, H2=50mm, and the thickness of the upper aerogel felt and the lower aerogel felt are the same, both W1=20mm.

[0009] In the present invention, the composite flexible fireproof and heat-insulating layer is composed of:

[0010] It comprises seven layers of flexible fireproof and heat-insulating layers stacked in sequence, which are respectively recorded as the first composite layer, the second composite layer, the third composite layer, the fourth composite layer, the fifth composite layer, the sixth composite layer and the seventh composite layer; the thickness of each layer is the same, which is W2=10mm; the distance from the flexible fireproof and heat-insulating material to the outer side surface of the upper pier is L;

[0011] The first composite layer and the second composite layer are attached to the surface of the flexible fireproof and heat-insulating material wrapped between the upper aerogel felt and the lower aerogel felt, and the sum of the thicknesses of the first composite layer and the second composite layer is equal to W1;

[0012] The third composite layer and the fourth composite layer are sequentially laminated and wrapped around the outer side of the second composite layer, the height of the third composite layer and the fourth composite layer is H3=H1+40mm, and the upper end is 20mm laminated with the lower surface of the upper buttress, and the lower end is 20mm laminated with the upper surface of the lower buttress;

[0013] The fifth composite layer and the sixth composite layer are sequentially attached and wrapped on the outside of the fourth composite layer. The fifth composite layer and the sixth composite layer are installed and arranged symmetrically in height. The upper ends of the fifth composite layer and the sixth composite layer are attached and wrapped to the edge of the outer side of the upper pier, and the upper ends of the fifth composite layer and the sixth composite layer are attached and wrapped to the edge of the outer side of the lower pier. The height of the fifth composite layer and the sixth composite layer is calculated based on the upper ends of the fifth composite layer and the sixth composite layer being attached and wrapped to the outer side of the upper pier for 10 to 15 mm.

[0014] The seventh composite layer is laminated and wrapped outside the sixth composite layer, with a height equal to H1, and the seventh composite layer is laminated and wrapped around, and the composite flexible fireproof and heat-insulating layer formed by seven layers of sequentially stacked flexible fireproof and heat-insulating layers is compacted to a thickness of 6*W2;

[0015] The seams of each composite layer are fixed by sewing or bonding, and the seams of adjacent composite layers are arranged in a staggered manner.

[0016] The high temperature resistant steel wire rope is wound above the seventh composite layer.

[0017] The structures of the first composite layer, the second composite layer, the third composite layer, the fourth composite layer, the fifth composite layer, the sixth composite layer and the seventh composite layer are the same; their structure includes a base layer and a flexible fireproof and heat-insulating layer bonded to the base layer, the base layer adopts a layer of radiation-proof cloth or a layer of silicone cloth, and the flexible fireproof and heat-insulating layer adopts one or more of rock wool, aluminum silicate fiber wool and glass fiber wool.

[0018] At the same time, the present invention also provides a construction process for the above-mentioned seismic isolation rubber bearing flexible fire protection structure, the steps are as follows:

[0019] Step 1: Fill the surrounding of the seismic isolation rubber bearing with flexible fireproof and heat-insulating materials, and the outer edges of the filled flexible fireproof and heat-insulating materials are flush with the outer edges of the upper flange plate and the lower flange plate. After filling, the outer surface of the flexible fireproof and heat-insulating materials is the same as the outer surfaces of the upper flange plate and the lower flange plate;

[0020] Step 2: Aerogel felts with a height of H2=50 mm are installed around the flexible fireproof and heat-insulating materials at the outer edge of the upper flange plate close to the upper pier and at the outer edge of the lower flange plate close to the lower pier. The upper aerogel felt and the lower aerogel felt are sewn or bonded at their respective seams. The upper aerogel felt and the lower aerogel felt are covered with a layer of radiation-proof cloth or a layer of silicone cloth.

[0021] Step 3: The first composite layer and the second composite layer are sequentially wrapped with the flexible fireproof and heat-insulating material between the upper aerogel felt and the lower aerogel felt, and the joints are sewn or bonded;

[0022] Step 4: The third composite layer and the fourth composite layer are sequentially laminated and wrapped on the outside of the second composite layer, and the joints are sewn or bonded; the upper and lower ends of the third composite layer and the fourth composite layer are laminated on the upper buttress and the lower buttress respectively;

[0023] Step 5: wrap the fifth and sixth composite layers on the outside of the fourth composite layer, and sew or bond them at the joints; the upper and lower ends of the fifth and sixth composite layers extend to the sides of the upper buttress and the lower buttress, respectively, to protect the gap between the upper buttress and the upper flange plate, and the gap between the lower buttress and the lower flange plate;

[0024] Step 6: Wrap the seventh composite layer around the outer periphery of the sixth composite layer, with a height equal to the height of the seismic isolation support, and use the seventh composite layer to tightly wrap the six composite layers inside it. Finally, compact the composite flexible fireproof and heat-insulating layer formed by the seven composite layers to a thickness equal to 6*W2, where W2 is the thickness of each composite layer, and sew or bond the joints of the seventh composite layer;

[0025] Step 7: Fix the composite flexible fireproof and heat-insulating layer around the upper pier with L-shaped steel plates, and fix the L-shaped steel plates to the upper pier with expansion bolts;

[0026] Step 8: Using a plurality of self-drilling screws to fix the composite flexible fireproof and heat-insulating layer on the side of the composite flexible fireproof and heat-insulating layer and below the L-shaped steel plate;

[0027] Step nine: Wrap a bundle of high temperature resistant steel wire ropes around the seventh composite layer to fasten the composite flexible fireproof and heat insulating layer.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The flexible fireproof protection structure involved in the present invention can move along with the movement of the seismic isolation rubber bearing, so that the seismic isolation rubber bearing is always wrapped in the flexible fireproof protection structure to block external fire sources and play a role in fire prevention and heat insulation; the total thickness of the composite flexible fireproof and heat-insulating protection material designed in the present invention is only 60 mm, and the thickness of the protective layer is small. It is applied to buildings without affecting other structures or the beauty of the interior of the building; the protective layer uses a composite flexible fireproof and heat-insulating protection material, which is lower in cost than fireproof panels and is suitable for large-area use; the design of each connection part in the present invention is unique, which is convenient for construction, later maintenance and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a front view of the application of the seismic isolation rubber bearing flexible fire protection structure of the present invention;

[0031] Figure 2 yes Figure 1 A top cross-sectional view of the flexible fire protection structure of the seismic isolation rubber bearing shown;

[0032] Figure 3 yes Figure 1 A schematic diagram of the flexible fire protection structure of the seismic isolation rubber bearing when the seismic isolation rubber bearing is in a deformed state;

[0033] Figure 4 It is a temperature curve diagram inside a test piece of a load-bearing fire resistance test of a seismic isolation rubber bearing adopting the flexible fire protection structure of the present invention;

[0034] In the figure:

[0035] 1-Flexible fireproof and heat-insulating material 2-Composite flexible fireproof and heat-insulating layer

[0036] 21-first composite layer 22-second composite layer

[0037] 23- third composite layer 24- fourth composite layer

[0038] 25- fifth composite layer 26- sixth composite layer

[0039] 27-7th composite layer 3-expansion bolt

[0040] 4-L-shaped steel plate 5-high temperature resistant steel wire rope

[0041] 6-Drilling screw 71-On aerogel felt

[0042] 72-lower aerogel felt 81-upper buttress

[0043] 82-lower pier 91-upper flange plate

[0044] 92-Lower flange plate DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention in any way.

[0046] like Figure 1 and Figure 2 As shown, a flexible fireproof protection structure of a seismic isolation rubber bearing proposed by the present invention is provided with an upper flange plate 91 between the seismic isolation rubber bearing and the upper pier 81, and a lower flange plate 92 between the seismic isolation rubber bearing and the lower pier 82. The height of the seismic isolation rubber bearing is H1, and a flexible fireproof and heat-insulating material 1 is filled around the periphery of the seismic isolation rubber bearing and between the upper flange plate 91 and the lower flange plate 92. The shape of the upper and lower flanges is determined according to the shape of the upper and lower piers. If the upper and lower piers are circular and the upper and lower flanges are also circular, if the upper and lower piers are regular quadrangular prisms, the upper and lower flanges are also square. In this embodiment, the upper pier 81 and the lower pier 82 are in the shape of regular quadrangular prisms. The outer surfaces of the upper flange plate 91, the lower flange plate 92 and the flexible fireproof and heat-insulating material 1 are the same, that is, a regular quadrangular prism surface. The upper aerogel felt 71 and the lower aerogel felt 72 are respectively attached at the joint between the upper flange plate 91 and the outer side of the flexible fireproof and heat-insulating material 1 and the joint between the lower flange plate 92 and the outer side of the flexible fireproof and heat-insulating material 1; the thickness of the upper aerogel felt 71 and the lower aerogel felt 72 are both W1; the height of the upper aerogel felt 71 is from the lower surface of the upper pier 81 to H2, and the height of the lower aerogel felt 72 is from the upper surface of the lower pier 82 to H2, H2 = 50mm, and the thickness of the upper aerogel felt 71 and the lower aerogel felt 72 are the same, both W1 = 20mm. A composite flexible fireproof and heat-insulating layer 2 is provided outward from the regular quadrangular prism surface between the upper aerogel felt 71 and the lower aerogel felt 72.

[0047] The composite flexible fireproof and heat-insulating layer 2 is composed of multiple layers of stacked and independent flexible fireproof and heat-insulating layers; that is, the composite flexible fireproof and heat-insulating layer 2 includes seven layers of stacked flexible fireproof and heat-insulating layers, which are respectively recorded as the first composite layer 21, the second composite layer 22, the third composite layer 23, the fourth composite layer 24, the fifth composite layer 25, the sixth composite layer 26 and the seventh composite layer 27; the structure of each layer is the same, and its structure includes a base layer and a flexible fireproof and heat-insulating layer attached to the base layer, the base layer adopts a layer of radiation-proof cloth or a layer of silicone cloth, and the flexible fireproof and heat-insulating layer adopts one or more of rock wool, aluminum silicate fiber wool and glass fiber wool. The thickness of each layer is the same, which is W2=10mm; the distance from the flexible fireproof and heat-insulating material 1 to the outer side of the upper pier 81 is L. In the composite flexible fireproof and heat-insulating layer 2, the seams of each composite layer are sewn or bonded, and the seams of adjacent composite layers are arranged in a staggered manner.

[0048] The first composite layer 21 and the second composite layer 22 are attached to and wrapped around the surface of the regular quadrangular prism between the upper aerogel felt 71 and the lower aerogel felt 72 , and the sum of the thicknesses of the first composite layer 21 and the second composite layer 22 is equal to W1 .

[0049] The third composite layer 23 and the fourth composite layer 24 are sequentially attached and wrapped around the outside of the second composite layer 22, and the height of the third composite layer 23 and the fourth composite layer 24 is H3=H1+40mm, and the upper end is 20mm attached to the lower surface of the upper pier 81, and the lower end is 20mm attached to the upper surface of the lower pier 82.

[0050] The fifth composite layer 25 and the sixth composite layer 26 are sequentially attached and wrapped around the outside of the fourth composite layer 24. The fifth composite layer 25 and the sixth composite layer 26 are installed symmetrically in height. The upper ends of the fifth composite layer 25 and the sixth composite layer 26 are attached and wrapped around the edge of the outer side of the upper buttress 81, and the upper ends of the fifth composite layer 25 and the sixth composite layer 26 are attached and wrapped around the edge of the outer side of the lower buttress 82. The height of the fifth composite layer 25 and the sixth composite layer 26 is calculated based on the upper ends of the fifth composite layer 25 and the sixth composite layer 26 being attached and wrapped around the outer side of the upper buttress 81 by 10 to 15 mm.

[0051] The seventh composite layer 27 is wrapped around the outside of the sixth composite layer 26, with a height equal to H1, and the seventh composite layer 27 is wrapped around and fitted, and the composite flexible fireproof and heat-insulating layer 2 formed by seven layers of sequentially stacked flexible fireproof and heat-insulating layers is compacted to a thickness of 6*W2.

[0052] A plurality of self-drilling screws 6 are passed through the composite flexible fireproof and heat-insulating layer 2 and into the flexible fireproof and heat-insulating material 1 for fastening, and the plurality of self-drilling screws 6 are evenly distributed along the circumference; the composite flexible fireproof and heat-insulating layer 2 is provided with an upper outer edge and a lower outer edge respectively covering the edges of the upper pier 81 and the lower pier 82, and a circle of steel plates 4 with an L-shaped cross section are fastened at the corners of the upper outer edge by a plurality of expansion bolts 3,

[0053] A high temperature resistant steel wire rope 5 is tightly wound around the outer periphery of the composite flexible fireproof and heat insulating layer 2 , that is, the high temperature resistant steel wire rope 5 is wound above the seventh composite layer 27 .

[0054] The construction process of the seismic isolation rubber bearing flexible fire protection structure proposed by the present invention is as follows:

[0055] 1) Fill the surrounding of the seismic isolation rubber bearing with flexible fireproof and heat-insulating material 1, and the outer edge of the filled flexible fireproof and heat-insulating material 1 is flush with the outer edge of the upper flange plate 91 and the lower flange plate 92. After filling, the outer surface of the flexible fireproof and heat-insulating material 1 is a regular quadrangular prism surface; the flexible fireproof and heat-insulating material 1 is one or more of rock wool, aluminum silicate fiber wool and glass fiber wool. Aerogel felts are installed around the flexible fireproof and heat-insulating material 1 in a square shape at the outer edge of the upper flange plate 91 close to the upper pier 81 and at the outer edge of the lower flange plate 92 close to the lower pier 82, which are the upper aerogel felt 71 and the lower aerogel felt 72, respectively.

[0056] The upper aerogel felt 71 in the present invention is a flexible thermal insulation felt with nano-silica aerogel as the main material and composited with glass fiber wool or pre-oxidized fiber felt, with a height of H2=50mm and a thickness of 20mm. The lower aerogel felt 72 has the same structure as the upper aerogel felt 71; the upper surface of the upper aerogel felt 71 is close to the upper pier 81 of the building, and the inner surface is close to the upper flange plate 91 and the flexible fireproof and thermal insulation material 1; the lower surface of the lower aerogel felt 72 is close to the lower pier 82 of the building, and the inner surface is close to the lower flange plate 92 and the flexible fireproof and thermal insulation material 1; the joints of the upper aerogel felt 71 and the lower aerogel felt 72 are sewn or bonded, for example, each layer of sewn Velcro is convenient for installation and fixation; the upper aerogel felt 71 and the lower aerogel felt 72 are both covered with a layer of radiation-proof cloth or a layer of silicone cloth.

[0057] 2) In the present invention, the composite flexible fireproof and heat-insulating layer 2 is composed of multiple layers of stacked and independent flexible fireproof and heat-insulating layers; that is, the composite flexible fireproof and heat-insulating layer 2 includes seven layers of flexible fireproof and heat-insulating layers stacked in sequence, which are respectively recorded as the first composite layer 21, the second composite layer 22, the third composite layer 23, the fourth composite layer 24, the fifth composite layer 25, the sixth composite layer 26 and the seventh composite layer 27; the structure of each layer is the same, and its structure includes a base layer and a flexible fireproof and heat-insulating layer attached to the base layer, the base layer adopts a layer of radiation-proof cloth or a layer of silicone cloth, and the flexible fireproof and heat-insulating layer adopts one or more of rock wool, aluminum silicate fiber wool and glass fiber wool. In this embodiment, the thickness of each layer is 10 mm. The top ends of the two innermost layers of the composite flexible fireproof and heat-insulating layer 2, namely the first composite layer 21 and the second composite layer 22, are in close contact with the lower edge of the upper aerogel felt 71, and the top ends of the other layers, namely the third, fourth, fifth, sixth and seventh layers, are in close contact with the upper piers of the building. The lower ends of the two innermost layers of the composite flexible fireproof and heat-insulating layer 2 are in close contact with the upper edge of the lower aerogel felt 72, and the lower ends of the other layers are in close contact with the lower piers 82 of the building.

[0058] The installation process of the composite flexible fireproof and heat-insulating layer 2 of the present invention is as follows:

[0059] The flexible fireproof and heat-insulating material 1 is closely attached between the upper aerogel felt 71 and the lower aerogel felt 72 to sequentially wrap the first composite layer 21 and the second composite layer 22 , and the joints are sewn or bonded.

[0060] The third composite layer 23 and the fourth composite layer 24 are sequentially laminated and wrapped on the outside of the second composite layer 22, and sewing or bonding is adopted at the joints; the upper and lower ends of the third composite layer 23 and the fourth composite layer 24 are laminated on the upper pier 81 and the lower pier 82 respectively; for example, the height of the third composite layer 23 and the fourth composite layer 24 is increased by 20 mm above and below the seismic isolation rubber bearing, so that the upper and lower ends of the third composite layer 23 and the fourth composite layer 24 can be laminated on the upper and lower piers 81 and 82; the material of the third composite layer 23 and the fourth composite layer 24 is composed of one or more of rock wool, aluminum silicate fiber wool and glass fiber wool laminated on a layer of decorative cloth, that is, a layer of radiation-proof cloth or a layer of silicone cloth is used as the base layer.

[0061] The fifth composite layer 25 and the sixth composite layer 26 are laminated and wrapped on the outer side of the fourth composite layer 24, and sewing or bonding is adopted at the joints; the upper and lower ends of the fifth composite layer 25 and the sixth composite layer 26 are respectively extended to the sides of the upper pier 81 and the lower pier 82. For example, the fifth composite layer 25 and the sixth composite layer 26 are increased in height by 50 mm at the top and bottom to protect the gap between the upper pier 81 and the upper flange plate 91 and the gap between the lower pier 82 and the lower flange plate 92.

[0062] The seventh composite layer 27 is wrapped around the outer periphery of the sixth composite layer 26, with a height equal to the height of the seismic isolation support, and is still wrapped in a square shape. The seventh composite layer 27 is used to wrap the six composite layers inside tightly, and finally the composite flexible fireproof and heat-insulating layer 2 formed by the seven composite layers is compacted to a thickness of 60 mm, and Velcro is sewn at the seams of the seventh composite layer 27 for easy installation and fixation.

[0063] 3) Fixing of the composite flexible fireproof and heat-insulating layer 2 after the above installation. The composite flexible fireproof and heat-insulating layer 2 is fixed with L-shaped steel plates 4 around the upper pier 81, and the L-shaped steel plates 4 are fixed to the upper pier 81 with expansion bolts 3. Three self-drilling screws 6 are used to fix the composite flexible fireproof and heat-insulating layer 2 on each of the four sides of the composite flexible fireproof and heat-insulating layer 2 and below the L-shaped steel plates 4. The three self-drilling screws 6 on each side are located at both ends and the middle of each side. In order to fix the self-drilling screws 6, a steel sheet with a thickness of 2 mm for fixing the self-drilling screws 6 is welded in advance at the corresponding position of the upper flange plate 91. After tightening the self-drilling screws 6, a bundle of high-temperature resistant steel wire ropes 5 with a diameter of 3 mm is wound around the top of the seventh composite layer 27 to fasten the composite flexible fireproof and heat-insulating layer 2.

[0064] The flexible fire protection structure of the present invention can move with the displacement of the seismic isolation rubber support without being damaged. Figure 3 As shown, the seismic isolation rubber bearing is always in the fire protection structure during use, meeting its fire protection requirements. The invention has the advantages of convenient construction and economic benefits.

[0065] Carry out load-bearing fire resistance test according to ISO834 international standard heating curve, such as Figure 4 An isolation rubber bearing with a flexible fire protection structure of the present invention is adopted, and seven measuring points are set on the rubber surface of the isolation rubber bearing. After a 3-hour fire resistance test, the temperature of each measuring point on the rubber surface of the isolation rubber bearing is below 70°C.

[0066] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many modifications without departing from the purpose of the present invention, all of which are within the protection of the present invention.

Claims

1. A flexible fireproof protection structure of a seismic isolation rubber bearing, wherein an upper flange plate (91) is provided between the seismic isolation rubber bearing and an upper pier (81), and a lower flange plate (92) is provided between the seismic isolation rubber bearing and a lower pier (82), the height of the seismic isolation rubber bearing is H1, and a flexible fireproof and heat-insulating material (1) is filled around the seismic isolation rubber bearing and between the upper flange plate (91) and the lower flange plate (92), and the outer side surfaces of the upper flange plate (91), the lower flange plate (92) and the flexible fireproof and heat-insulating material (1) are the same; characterized in that: An upper aerogel felt (71) is bonded to the joint between the upper flange plate (91) and the outer surface of the flexible fireproof and heat-insulating material (1), and a lower aerogel felt (72) is bonded to the joint between the lower flange plate (92) and the outer surface of the flexible fireproof and heat-insulating material (1); the thickness of the upper aerogel felt (71) and the lower aerogel felt (72) are both W1; A composite flexible fireproof and heat-insulating layer (2) is provided on the surface of the flexible fireproof and heat-insulating material (1) between the upper aerogel felt (71) and the lower aerogel felt (72), and the composite flexible fireproof and heat-insulating layer (2) is composed of multiple layers of overlapping and mutually independent flexible fireproof and heat-insulating layers; a plurality of self-drilling screws (6) are passed through the composite flexible fireproof and heat-insulating layer (2) and into the flexible fireproof and heat-insulating material (1) for fastening, and the plurality of self-drilling screws (6) are evenly distributed along the circumferential direction; the composite flexible fireproof and heat-insulating layer (2) is provided with an upper outer edge and a lower outer edge respectively covering the edges of the upper pier (81) and the lower pier (82), and a circle of steel plates (4) with an L-shaped cross-section are fastened at the corners of the upper outer edge by a plurality of expansion bolts (3); A high temperature resistant steel wire rope (5) is tightly wound around the outer periphery of the composite flexible fireproof and heat insulating layer (2).

2. The seismic isolation rubber bearing flexible fire protection structure according to claim 1 is characterized in that: The height of the upper aerogel felt (71) is from the lower surface of the upper pier (81) downward to H2, and the height of the lower aerogel felt (72) is from the upper surface of the lower pier (82) upward to H2, H2=50mm, and the thickness of the upper aerogel felt (71) and the lower aerogel felt (72) are the same, both W1=20mm.

3. The seismic isolation rubber bearing flexible fire protection structure according to claim 2 is characterized in that: The composite flexible fireproof and heat-insulating layer (2) comprises seven layers of flexible fireproof and heat-insulating layers stacked in sequence, which are respectively referred to as a first composite layer (21), a second composite layer (22), a third composite layer (23), a fourth composite layer (24), a fifth composite layer (25), a sixth composite layer (26) and a seventh composite layer (27); the thickness of each layer is the same, which is W2=10 mm; the distance from the flexible fireproof and heat-insulating material (1) to the outer side surface of the upper pier (81) is L; The first composite layer (21) and the second composite layer (22) are attached to the surface of the flexible fireproof and heat-insulating material (1) wrapped between the upper aerogel felt (71) and the lower aerogel felt (72), and the sum of the thicknesses of the first composite layer (21) and the second composite layer (22) is equal to W1; The third composite layer (23) and the fourth composite layer (24) are sequentially attached and wrapped around the outer side of the second composite layer (22); the height of the third composite layer (23) and the fourth composite layer (24) is H3=H1+40mm, and the upper end is 20mm attached to the lower surface of the upper buttress (81), and the lower end is 20mm attached to the upper surface of the lower buttress (82); The fifth composite layer (25) and the sixth composite layer (26) are sequentially attached and wrapped around the outer side of the fourth composite layer (24); the fifth composite layer (25) and the sixth composite layer (26) are installed and arranged symmetrically in height; the upper ends of the fifth composite layer (25) and the sixth composite layer (26) are attached and wrapped around the edge of the outer side of the upper buttress (81); the upper ends of the fifth composite layer (25) and the sixth composite layer (26) are attached and wrapped around the edge of the outer side of the lower buttress (82); the height of the fifth composite layer (25) and the sixth composite layer (26) is calculated based on the upper ends of the fifth composite layer (25) and the sixth composite layer (26) being attached and wrapped around the outer side of the upper buttress (81) by 10 to 15 mm; The seventh composite layer (27) is wrapped around the outside of the sixth composite layer (26) with a height equal to H1, and the seventh composite layer (27) is wrapped around and fitted, and the composite flexible fireproof and heat-insulating layer (2) formed by seven layers of sequentially stacked flexible fireproof and heat-insulating layers is compacted to a thickness of 6*W2; The seams of each composite layer are fixed by sewing or bonding, and the seams of adjacent composite layers are arranged in a staggered manner.

4. The seismic isolation rubber bearing flexible fire protection structure according to claim 3 is characterized in that: The high temperature resistant steel wire rope (5) is wound above the seventh composite layer (7).

5. The seismic isolation rubber bearing flexible fire protection structure according to claim 3 is characterized in that: The first composite layer (21), the second composite layer (22), the third composite layer (23), the fourth composite layer (24), the fifth composite layer (25), the sixth composite layer (26) and the seventh composite layer (27) have the same structure; Its structure includes a base layer and a flexible fireproof and heat-insulating layer attached to the base layer. The base layer adopts a layer of radiation-proof cloth or a layer of silicone cloth, and the flexible fireproof and heat-insulating layer adopts one or more of rock wool, aluminum silicate fiber wool and glass fiber wool.

6. A construction process for a seismic isolation rubber bearing flexible fire protection structure, characterized in that: The steps include: Step 1: Fill the flexible fireproof and heat-insulating material (1) around the seismic isolation rubber bearing, wherein the outer edge of the filled flexible fireproof and heat-insulating material (1) is flush with the outer edges of the upper flange plate (91) and the lower flange plate (92); after filling, the outer surface of the flexible fireproof and heat-insulating material (1) is the same as the outer surface of the upper flange plate (91) and the lower flange plate (92); Step 2: Aerogel felts with a height of H2 = 50 mm are installed around the flexible fireproof and heat-insulating material (1) at the outer edge of the upper flange plate (91) close to the upper pier (81) and at the outer edge of the lower flange plate (92) close to the lower pier (82), namely, upper aerogel felt (71) and lower aerogel felt (72), wherein the joints of the upper aerogel felt (71) and lower aerogel felt (72) are sewn or bonded, and the upper aerogel felt (71) and lower aerogel felt (72) are covered with a layer of radiation-proof cloth or a layer of silicone cloth; Step 3: The first composite layer (21) and the second composite layer (22) are sequentially attached and wrapped with the flexible fireproof and heat-insulating material (1) between the upper aerogel felt (71) and the lower aerogel felt (72), and the joints are sewn or bonded; Step 4: The third composite layer (23) and the fourth composite layer (24) are sequentially laminated and wrapped on the outer side of the second composite layer (22), and the seams are sewn or bonded; the upper and lower ends of the third composite layer (23) and the fourth composite layer (24) are laminated on the upper buttress (81) and the lower buttress (82), respectively; Step 5: The fifth composite layer (25) and the sixth composite layer (26) are laminated and wrapped on the outer side of the fourth composite layer (24), and the joints are sewn or bonded; the upper and lower ends of the fifth composite layer (25) and the sixth composite layer (26) are respectively extended to the sides of the upper buttress (81) and the lower buttress (82), so as to protect the gap between the upper buttress (81) and the upper flange plate (91) and the gap between the lower buttress (82) and the lower flange plate (92); Step 6: Wrap the seventh composite layer (27) around the outer periphery of the sixth composite layer (26) to a height equal to the height of the seismic isolation support, use the seventh composite layer (27) to tightly wrap the six composite layers inside, and finally compact the composite flexible fireproof and heat-insulating layer (2) formed by the seven composite layers to a thickness equal to 6*W2, where W2 is the thickness of each composite layer, and sew or bond the joints of the seventh composite layer (27); Step 7: fix the composite flexible fireproof and heat-insulating layer (2) around the upper buttress (81) with a steel plate (4) with an L-shaped cross section, and fix the L-shaped steel plate (4) to the upper buttress (81) with expansion bolts (3); Step 8: Using a plurality of self-drilling screws (6) to fix the composite flexible fireproof and heat-insulating layer (2) on the side of the composite flexible fireproof and heat-insulating layer (2) and below the L-shaped steel plate (4); Step nine: Wrap a bundle of high temperature resistant steel wire ropes (5) around the seventh composite layer (27) to fasten the composite flexible fireproof and heat insulating layer (2).

7. According to the construction process of the seismic isolation rubber bearing flexible fire protection structure according to claim 6, in step one, the flexible fireproof and heat-insulating material (1) is one or more of rock wool, aluminum silicate fiber wool and glass fiber wool.

8. According to the construction process of the seismic isolation rubber bearing flexible fire protection structure according to claim 6, in step eight, the positions of multiple self-drilling screws (6) are evenly distributed along the circumferential direction on the side.

9. According to the construction process of the seismic isolation rubber bearing flexible fire protection structure according to claim 6, in step nine, the diameter of the high temperature resistant steel wire rope (5) is 3 mm.

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