Shock insulation support with high-viscosity and high-elasticity modified asphalt and manufacturing method of shock insulation support

Abstract

The invention relates to a shock insulation support with high-viscosity and high-elasticity modified asphalt and a manufacturing method of the shock insulation support. The shock insulation support comprises a lower support, an upper support and a lower support, the sliding block is movably arranged in the lower support, and a mounting groove is formed in the top of the sliding block; the spherical crown plate is arranged in the mounting groove; the upper support is mounted in the mounting groove and is positioned above the spherical crown plate; the spring is supported and connected between the sliding block and the corresponding side wall of the lower support; the high-viscosity and high-elasticity modified asphalt structure is poured between the sliding block and the corresponding side wall of the lower support, and a spring is embedded and fixed in the high-viscosity and high-elasticity modified asphalt structure. The high-viscosity high-elasticity modified asphalt and the spring are combined to form a novel damping structure, the novel damping structure is arranged on the periphery of the sliding block and is a damper mainly relied on by the shock insulation support, the support design is optimized, the contradiction between shock insulation and energy consumption is solved, compared with a lead core, the energy consumption effect of the high-viscosity high-elasticity modified asphalt structure is slightly influenced by temperature, and the service life of the high-viscosity high-elasticity modified asphalt structure is prolonged. And the functional requirements of a large-span concrete structure under the normal use load condition can be met, and the environmental adaptability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge seismic isolation, and in particular to a seismic isolation support provided with high-viscosity and high-elasticity modified asphalt and a manufacturing method thereof. Background Art

[0002] Seismic isolation technology is to set up a flexible seismic isolation layer between the structural foundation or the lower structure and the upper structure to form a system with damping energy dissipation and overall reset functions. By extending the vibration period of the entire structural system and avoiding the period range where the seismic energy is concentrated, the purpose of reducing the seismic shear force of the structure is achieved. Extending the period of the structural system will cause an increase in the displacement response, but it can be controlled by increasing the damping of the structural system, and the acceleration response of the system can also be suppressed. Therefore, the seismic isolation system of the bridge needs to have a certain horizontal flexibility and damping energy dissipation capacity. Under the action of an earthquake, the seismic force can be reduced by extending the structural period, and the displacement response of the structure can be controlled by damping energy dissipation; at the same time, it needs to have a large initial stiffness under normal use load conditions to control the horizontal deformation of the structure and avoid adverse vibrations to meet the requirements of normal use functions.

[0003] In the field of bridge seismic isolation, domestic and foreign scholars have carried out a large number of research works with important engineering application value by using technical means such as theoretical analysis, numerical simulation, shaking table test and on-site earthquake response observation, which provide important technical support for ensuring the safety of bridge structures under earthquakes. However, the hysteretic mechanical properties of lead rubber bearings are significantly affected by ambient temperature, and the energy dissipation performance depends on the shear plastic deformation of the lead core. Its fine dynamic behavior under earthquakes needs further study; due to the complexity and variability of the bridge site environment, and the characteristics of continuous beam bridges due to large spans and significant temperature-induced deformation, the resistance of traditional lead rubber bearings to temperature-induced deformation is very low, and it is difficult to meet the functional requirements of large-span concrete structures under normal service loads (strong winds, small earthquakes, vehicle braking, etc.), and its environmental adaptability needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt and a method for manufacturing the same, so as to solve the problem that the existing lead core rubber bearing has very low resistance to temperature-induced deformation and is difficult to meet the functional requirements of large-span concrete structures under normal use load conditions (strong winds, small earthquakes, vehicle braking, etc.).

[0005] The technical solution to achieve the above purpose is:

[0006] The present invention provides a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt, comprising:

[0007] Lower support;

[0008] A sliding block movably arranged in the lower support, wherein a mounting groove is arranged on the top of the sliding block;

[0009] A spherical crown plate disposed in the mounting groove;

[0010] An upper support installed in the installation groove and located above the spherical crown plate;

[0011] A spring supporting and connecting between the slider and the corresponding side wall of the lower support;

[0012] The high-viscosity and high-elasticity modified asphalt is poured between the sliding block and the corresponding side walls of the lower support, and the high-viscosity and high-elasticity modified asphalt embeds the spring.

[0013] A further improvement of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that the high-viscosity and high-elasticity modified asphalt includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of viscosity enhancer, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of plasticizer and 0.03 parts by weight of stabilizer.

[0014] A further improvement of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that the stiffness of the spring is determined according to the vertical load of the bearing design, ensuring that the bearing has good mobility and post-earthquake self-resetting ability. It is recommended that it is greater than 8kN / mm for general building structures.

[0015] The further improvement of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that the storage shear modulus of the high-viscosity and high-elasticity modified asphalt in the temperature range of 5-15°C and the frequency range of 1-10Hz is 1.5-20MPa, the loss shear modulus is 1.5-20MPa, and the loss factor is 0.8-1.1; the storage shear modulus in the temperature range of 15-25°C and the frequency range of 1-10Hz is 0.2-5.0MPa, the loss shear modulus is 0.2-5.0MPa, and the loss factor is 1.0-1.3; the storage shear modulus in the temperature range of 25-35°C and the frequency range of 1-10Hz is 0.08-0.9MPa, the loss shear modulus is 0.09-1.1MPa, and the loss factor is 1.1-1.3.

[0016] A further improvement of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that the viscosity-toughness of the high-viscosity and high-elasticity modified asphalt at 25°C is not less than 32.0 N·m, and the toughness is not less than 24.0 N·m.

[0017] The present invention uses a high-viscosity and high-elastic modified asphalt, which is not the high-viscosity modified asphalt specified in the "Technical Specification for Design and Construction of Drainage Asphalt Pavement" (JTG / T 3350-03-2020) and other standards, nor is it the high-elastic modified asphalt specified in the "Technical Standard for Construction of Asphalt Concrete Bridge Deck Pavement of Urban Bridges" (CJJ / T 279-2018) and other standards. The high-viscosity and high-elastic modified asphalt of the present invention has a large Brookfield rotation viscosity, a high softening point, high viscosity and toughness, but also has the characteristics of large penetration, large penetration index (low temperature sensitivity), large ductility, etc., has good high and low temperature performance, and can still maintain good physical and mechanical properties in a wide temperature range.

[0018] A further improvement of the seismic isolation support provided with high-viscosity and high-elasticity modified asphalt of the present invention is that a ring plate is provided on the side wall of the lower support, and the end of the ring plate is arranged close to the outer surface of the slider;

[0019] The outer surface of the slider is provided with a step surface corresponding to the ring plate, the horizontal surface of the step surface is flush with the upper surface of the ring plate, and the vertical surface of the step surface is arranged opposite to the end surface of the ring plate;

[0020] An isolation film is laid on the horizontal surface of the step surface and the upper surface of the ring plate;

[0021] The high-viscosity and high-elasticity modified asphalt is arranged on the isolation membrane.

[0022] The present invention also provides a method for manufacturing a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt, comprising the following steps:

[0023] A lower support and a slider are provided, the slider is movably arranged in the lower support, and a mounting groove is provided on the top of the slider;

[0024] Providing a spherical crown plate, and placing the spherical crown plate in the mounting groove;

[0025] Providing an upper support, installing the upper support in the mounting groove and placing it on the spherical crown plate;

[0026] Providing a spring to connect the spring support between the slider and the corresponding side wall of the lower support;

[0027] High-viscosity and high-elasticity modified asphalt is poured between the sliding block and the corresponding side walls of the lower support to bury the spring.

[0028] A further improvement in the method for making a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that the high-viscosity and high-elasticity modified asphalt includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of a compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of a viscosity enhancer, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of a plasticizer and 0.03 parts by weight of a stabilizer.

[0029] A further improvement of the manufacturing method of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is that before pouring the high-viscosity and high-elasticity modified asphalt, an isolation film is laid on the corresponding surfaces of the slider and the lower bearing;

[0030] The high-viscosity and high-elasticity modified asphalt is poured onto the isolation membrane.

[0031] The beneficial effects of the seismic isolation support provided with high-viscosity and high-elasticity modified asphalt and the manufacturing method thereof of the present invention are:

[0032] The present invention combines high-viscosity and high-elasticity modified asphalt with a spring to form a new damping structure, which is arranged around the slider and is the main damper relied on by the seismic isolation bearing. The bearing design is optimized to solve the contradiction between seismic isolation and energy consumption. Compared with the lead core, the energy consumption effect of the high-viscosity and high-elasticity modified asphalt is less affected by temperature, and can meet the functional requirements of large-span concrete structures under normal use load conditions, and has high environmental adaptability.

[0033] The spring arranged on the seismic isolation bearing of the present invention can realize the resetting function of the bearing. The high-viscosity and high-elasticity modified asphalt is used as an important energy-consuming material to increase the energy-consuming performance of the bearing, which solves the pain point that the traditional sliding seismic isolation bearing needs to consider that the sliding friction coefficient cannot be too large and the friction energy consumption friction coefficient cannot be too small. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of the first embodiment of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt according to the present invention.

[0035] Figure 2 It is a structural schematic diagram of the second embodiment of the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention.

[0036] Figure 3 The present invention is a flow chart of a method for manufacturing a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] See also Figure 1The present invention provides a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt and a method for making the same, which are used to solve the problem that the friction coefficient of the sliding surface of the sliding seismic isolation bearing is too large and is not conducive to seismic isolation, and that the bearing is too small and consumes less energy. It is also used to solve the problem that the existing lead rubber bearing has very low resistance to temperature-induced deformation and is difficult to meet the functional requirements of large-span concrete structures under normal use load regulation. The present invention adopts a high-viscosity and high-elasticity modified asphalt with a large loss factor, high viscosity, and low temperature sensitivity combined with a spring to form a new type of damper, which is arranged around the sliding seismic isolation bearing. It is the main energy consumption of the sliding seismic isolation bearing, optimizes the bearing design, and solves the contradiction between seismic isolation and energy consumption. The seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt and a method for making the same of the present invention are described below in conjunction with the accompanying drawings.

[0039] See also Figure 1 , showing a schematic structural diagram of the first embodiment of the seismic isolation support provided with high-viscosity and high-elasticity modified asphalt according to the present invention. Figure 1 , the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention is described.

[0040] like Figure 1 As shown, the seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt of the present invention includes a lower bearing 21, a slider 22, a spherical crown plate 23, an upper bearing 24, a spring 25 and a high-viscosity and high-elasticity modified asphalt structure 26. The slider 22 is movably arranged in the lower bearing 21, and a mounting groove is arranged on the top of the slider 22, and the spherical crown plate 23 is arranged in the mounting groove; the upper bearing 24 is installed in the mounting groove and is located above the spherical crown plate 23; the spring 25 is supported and connected between the slider 22 and the corresponding side walls of the lower bearing 21, and the high-viscosity and high-elasticity modified asphalt structure 26 is poured and formed between the slider 22 and the corresponding side walls of the lower bearing 21, and the high-viscosity and high-elasticity modified asphalt structure 26 buries the spring 25.

[0041] Preferably, the lower support 21 includes a bottom plate and a baffle plate erected around the bottom plate, the slider 22 is placed on the bottom plate and located on the inner side of the baffle plate, and a movable gap is left between the side of the slider 22 and the baffle plate to facilitate the sliding of the slider 22. The spring 21 is supported between the slider 22 and the baffle plate, and the spring 21 is preferably arranged at intervals along the outer periphery of the slider 22. When the slider 22 slides, it will squeeze and stretch the corresponding spring 25, so that the spring 25 generates a reset force on the slider 22. The high-viscosity and high-elasticity modified asphalt structure 2,6 is poured and formed between the slider 22 and the corresponding part of the baffle plate. The high-viscosity and high-elasticity modified asphalt structure 26 buries the spring 25. The high-viscosity and high-elasticity modified asphalt 26 increases the energy consumption performance of the slider 22 when sliding, and effectively reduces the input energy of the earthquake.

[0042] Furthermore, the high-viscosity and high-elasticity modified asphalt structure 26 of the present invention is formed by injected high-viscosity and high-elasticity modified asphalt, which includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of viscosity enhancer, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of plasticizer and 0.03 parts by weight of stabilizer.

[0043] In a preferred embodiment, the compatibilizer is an interface agent. Specifically, the interface agent is aromatic hydrocarbon solvent oil.

[0044] In a preferred embodiment, the tackifier is coumarone resin.

[0045] In a preferred embodiment, the stabilizer is a composite stabilizer. In this embodiment, the composite stabilizer is a WD-5 composite vulcanization stabilizer produced by Shandong Haosheng Energy Co., Ltd.

[0046] Furthermore, the stiffness of the spring is determined according to the designed vertical load of the bearing to ensure that the bearing has good mobility and post-earthquake self-reset ability. For general building structures, it is recommended that it is greater than 8kN / mm.

[0047] Furthermore, when the temperature range of high-viscosity and high-elastic modified asphalt is 5-15°C, the storage shear modulus range of the frequency range of 1-10Hz is 1.5-20MPa, the loss shear modulus range of 1.5-20MPa, the loss factor range of 0.8-1.1; when the temperature range is 15-25°C, the storage shear modulus range of the frequency range of 1-10Hz is 0.2-5.0MPa, the loss shear modulus range of 0.2-5.0MPa, the loss factor range of 1.0-1.3; when the temperature range is 25-35°C, the storage shear modulus range of the frequency range of 1-10Hz is 0.08-0.9MPa, the loss shear modulus range of 0.09-1.1MPa, and the loss factor range of 1.1-1.3.

[0048] The viscosity and toughness of the high-viscosity and high-elasticity modified asphalt at 25°C are not less than 32.0 N·m, and the toughness is not less than 24.0 N·m.

[0049] In a specific embodiment of the present invention, Figure 1 As shown, the side wall of the lower support 21 is provided with a ring plate 211, and the end of the ring plate 211 is arranged close to the outer surface of the slider 22;

[0050] The outer surface of the slider 22 is provided with a step surface corresponding to the ring plate 211, the horizontal surface 221 of the step surface is flush with the upper surface of the ring plate 211, and the vertical surface 222 of the step surface is arranged opposite to the end surface of the ring plate 211;

[0051] An isolation film 27 is laid on the horizontal surface 221 of the step surface and the upper surface of the ring plate 211;

[0052] The high-viscosity and high-elasticity modified asphalt structure 26 is disposed on the isolation membrane 27 .

[0053] By providing the isolation film 27 , the high-viscosity and high-elasticity modified asphalt structure 26 is provided on the upper part of the slider 22 and the lower support 21 , so that a movable gap is left between the lower part of the slider 22 and the lower support 21 .

[0054] In a specific embodiment of the present invention, a first sliding plate is arranged between the bottom surface of the slider 22 and the upper surface of the bottom plate of the lower support 21; a second sliding plate is arranged between the ball crown plate 23 and the bottom of the mounting groove of the slider 22 to facilitate sliding energy dissipation between the structures.

[0055] Figure 1 In the first embodiment shown, the spring 25 is a bolt-type column spring.

[0056] like Figure 2 As shown, in the second embodiment of the present invention, the spring 25 is a plate-shaped spring, and the high-viscosity and high-elasticity modified asphalt structure 26 embeds the plate-shaped spring. The rest of the structure of the second embodiment is the same as that of the first embodiment.

[0057] The present invention also provides a method for manufacturing a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt, comprising the following steps:

[0058] like Figure 3 As shown, step S11 is performed to provide a lower support and a slider, and the slider is movably arranged in the lower support, and a mounting groove is provided on the top of the provided slider; then step S12 is performed;

[0059] Execute step S12, provide a spherical crown plate, and place the spherical crown plate in the installation groove; then execute step S13;

[0060] Execute step S13, provide an upper support, install the upper support in the installation groove and place it on the spherical crown plate; then execute step S14;

[0061] Execute step S14, provide a spring, and connect the spring support between the slider and the corresponding side wall of the lower support; then execute step S15;

[0062] Execute step S15 to inject high-viscosity and high-elasticity modified asphalt between the slider and the corresponding side wall of the lower support to embed the spring.

[0063] Furthermore, the high-viscosity and high-elastic modified asphalt includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of tackifier, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of plasticizer and 0.03 parts by weight of stabilizer.

[0064] In a specific embodiment of the present invention, before pouring the high-viscosity and high-elasticity modified asphalt, an isolation membrane is laid on the surfaces corresponding to the slider and the lower support;

[0065] Pour high-viscosity and high-elastic modified asphalt onto the isolation membrane.

[0066] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt, characterized in that: include: Lower support; A sliding block movably arranged in the lower support, wherein a mounting groove is arranged on the top of the sliding block; A spherical crown plate disposed in the mounting groove; An upper support installed in the installation groove and located above the spherical crown plate; A spring supporting and connecting between the slider and the corresponding side wall of the lower support; The high-viscosity and high-elasticity modified asphalt is poured between the sliding block and the corresponding side walls of the lower support, and the high-viscosity and high-elasticity modified asphalt embeds the spring.

2. The seismic isolation support provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 1, characterized in that: The high-viscosity and high-elastic modified asphalt includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of tackifier, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of plasticizer and 0.03 parts by weight of stabilizer.

3. The seismic isolation support provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 1, characterized in that: The stiffness of the spring is determined according to the designed vertical load of the support, ensuring that the support has good mobility and post-earthquake self-reset capability.

4. The seismic isolation support provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 1, characterized in that: The high-viscosity and high-elastic modified asphalt has a temperature range of 5 to 15°C, a frequency range of 1 to 10 Hz, a storage shear modulus range of 1.5 to 20 MPa, a loss shear modulus range of 1.5 to 20 MPa, and a loss factor range of 0.8 to 1.1; a temperature range of 15 to 25°C, a frequency range of 1 to 10 Hz, a storage shear modulus range of 0.2 to 5.0 MPa, a loss shear modulus range of 0.2 to 5.0 MPa, and a loss factor range of 1.0 to 1.3; a temperature range of 25 to 35°C, a frequency range of 1 to 10 Hz, a storage shear modulus range of 0.08 to 0.9 MPa, a loss shear modulus range of 0.09 to 1.1 MPa, and a loss factor range of 1.1 to 1.

3.

5. The seismic isolation support provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 1, characterized in that: The viscosity and toughness of the high-viscosity and high-elasticity modified asphalt at 25°C are not less than 32.0 N·m, and the toughness is not less than 24.0 N·m.

6. The seismic isolation support provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 1, characterized in that: A ring plate is provided on the side wall of the lower support, and an end of the ring plate is arranged close to the outer surface of the slider; The outer surface of the slider is provided with a step surface corresponding to the ring plate, the horizontal surface of the step surface is flush with the upper surface of the ring plate, and the vertical surface of the step surface is arranged opposite to the end surface of the ring plate; An isolation film is laid on the horizontal surface of the step surface and the upper surface of the ring plate; The high-viscosity and high-elasticity modified asphalt is arranged on the isolation membrane.

7. A method for manufacturing a seismic isolation support provided with high-viscosity and high-elasticity modified asphalt, characterized in that: The steps include: A lower support and a slider are provided, the slider is movably arranged in the lower support, and a mounting groove is provided on the top of the slider; Providing a spherical crown plate, and placing the spherical crown plate in the mounting groove; Providing an upper support, installing the upper support in the mounting groove and placing it on the spherical crown plate; Providing a spring to connect the spring support between the slider and the corresponding side wall of the lower support; High-viscosity and high-elasticity modified asphalt is poured between the sliding block and the corresponding side walls of the lower support, and the spring is embedded in the poured high-viscosity and high-elasticity modified asphalt.

8. The method for manufacturing a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 7, characterized in that: The high-viscosity and high-elastic modified asphalt includes the following materials in parts by weight: 100 parts by weight of base asphalt, 3.0 parts by weight of compatibilizer, 5.0 parts by weight of PE, 7.0 parts by weight of tackifier, 4.0 parts by weight of SBR, 6.0 parts by weight of SBS, 2.5 parts by weight of plasticizer and 0.03 parts by weight of stabilizer.

9. The method for manufacturing a seismic isolation bearing provided with high-viscosity and high-elasticity modified asphalt as claimed in claim 6, characterized in that: Before pouring the high-viscosity and high-elasticity modified asphalt, laying an isolation membrane on the corresponding surfaces of the slider and the lower support; The high-viscosity and high-elasticity modified asphalt is poured onto the isolation membrane.

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