CN114133634A - Constraint composite material and composite layer for energy dissipation core material, preparation method of constraint composite material and composite damper - Google Patents
Constraint composite material and composite layer for energy dissipation core material, preparation method of constraint composite material and composite damper Download PDFInfo
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- CN114133634A CN114133634A CN202111002008.8A CN202111002008A CN114133634A CN 114133634 A CN114133634 A CN 114133634A CN 202111002008 A CN202111002008 A CN 202111002008A CN 114133634 A CN114133634 A CN 114133634A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
Abstract
The invention discloses a constraint composite material for an energy dissipation core material, a constraint composite layer, a preparation method of the constraint composite material and a composite damper using the constraint composite layer; the constraint composite layer is formed by overlapping special rubber and framework materials, effectively constrains the metal with low yield point to be uniformly deformed, prevents the metal from being extruded into the viscoelastic material layer in the deformation process, and effectively improves the energy consumption and the fatigue of the composite damper. The composite viscoelastic damper with the constraint comprises a viscoelastic material, a low-yield-point metal, a shear connecting plate and a constraint composite layer, wherein the constraint composite layer is positioned around the viscoelastic material and the low-yield-point metal in the damper and is formed by compounding a steel wire and constraint layer rubber; the constraint composite layer provided by the invention forms wrapping constraint on the low-yield-point metal, effectively improves the uniform deformation of the low-yield-point metal, and prevents the metal from being extruded into a viscoelastic material in the deformation process, thereby improving the energy consumption capability and fatigue recovery of the composite viscoelastic damper with constraint.
Description
Technical Field
The invention relates to the technical field of building shock absorption and earthquake resistance, in particular to a constraint composite material and a constraint composite layer for an energy dissipation core material, a preparation method of the constraint composite material and a composite damper using the constraint composite layer.
Background
The viscoelastic damper is a damping energy dissipation device which is formed by integrally vulcanizing a plurality of layers of internal viscoelastic damping materials and a plurality of layers of internal steel plates in an overlapped mode. The composite viscoelastic damper is formed by adding metal such as a lead core and the like into the viscoelastic damper, so that the energy consumption capability and the effective rigidity of the damper are improved.
Metal composite viscoelastic dampers are used in buildings to reduce wind vibration or seismic effects. The metal composite type viscoelastic damper is obtained by assembling a lead core or other metals on the viscoelastic damper. But the resilience force provided by rubber in the deformation process of the composite damper obtained by directly assembling and adding metals such as lead core and the like is not enough to enable the metals in the composite damper to uniformly deform, and meanwhile, the metals in the damper can permanently extrude softer viscoelastic materials into the steel plate interlayer due to non-uniform deformation, so that the prepared metal composite damper has an incomplete curve after the enveloping curve of the metal composite damper reciprocates, and has large stress attenuation and poor fatigue performance.
Compared with the traditional metal composite viscoelastic damper, the invention provides the composite damper with the restraint, the restraint layer is added in the damper, the metal in the damper is effectively restrained from uniformly deforming, and the energy consumption capability, the stability, the fatigue recovery and the like are obviously improved.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a constraint composite layer rubber for a composite damper and a constraint composite layer structure, so as to solve the problems that the existing damper is not full in an enveloping curve of the damper, large in stress attenuation and poor in fatigue property due to the fact that a low-yield-point metal is extruded and unevenly deformed and is partially pressed into a softer visco-elastic rubber layer in the shearing deformation process. Specifically, the invention is realized by the following steps:
the constrained composite material comprises a special rubber material, wherein the special rubber material comprises zinc methacrylate and maleic anhydride grafted polybutadiene.
Further, the special rubber material comprises the following components in percentage by weight: 100 parts of diene rubber, 10-70 parts of white carbon black or carbon black, 0-30 parts of zinc methacrylate, 0-3 parts of an anti-aging agent, 0-3 parts of a bridging agent, 0-3 parts of sulfur, 1-3 parts of an activation system, 0-10 parts of tackifying resin and 0-15 parts of maleic anhydride grafted polybutadiene. The bridging agent comprises a resin curing agent or a peroxide crosslinking agent.
And secondly, forming a constraint composite layer based on the constraint composite material, wherein the constraint composite layer is formed by laminating special rubber and a framework material, is used for being bonded with the surface of the energy consumption core material and forming local or overall package on the energy consumption core material, and can constrain the energy consumption core material to be uniformly deformed and prevent the energy consumption core material from being excessively deformed or being extruded into the viscoelastic material layer in the deformation process. The framework material is metal wire, metal net or metal pipe.
Furthermore, the surface bonding of the restraint composite layer and the energy consumption core material is vulcanization bonding; at least one layer of special rubber and framework material are crossed or paved to form a composite rubber layer; the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene.
Then, a viscoelastic damper applied and constructed based on the above-mentioned constrained composite layer includes: the energy-consuming core material binding and wrapping device comprises an outer shearing connecting plate, a middle shearing connecting plate, a viscoelastic material, an energy-consuming core material and a binding composite layer which is bonded with and wraps the energy-consuming core material, wherein the binding composite layer is formed by overlapping special rubber and a framework material, and the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene. The energy dissipation core material is a metal bar with a low yield point, the middle shearing connecting plate is provided with a through hole with a corresponding diameter, and the outer shearing connecting plate is provided with a blind hole with a corresponding diameter; the viscoelastic material is rubber elastic material or high damping rubber; the low-yield-point metal bar penetrates through the through hole and is arranged in the corresponding blind hole; the framework material is a steel wire, a fiber or a metal net, and is crossed or tiled with a special rubber material to form a model; and the constraint composite layer wraps the periphery of the low-yield-point metal bar and is subjected to main body vulcanization bonding molding with the outer shear connecting plates and the viscoelastic materials on the two sides.
Finally, the invention also provides a preparation method of the constrained composite material for the energy dissipation core material, which comprises the following steps: preparing components including zinc methacrylate and maleic anhydride grafted polybutadiene, and weighing the components in proportion; firstly plasticating the rubber in an internal mixer for 60-120 s to enable the plasticity of the rubber to reach 0.3-0.4, then sequentially adding an activation system, an anti-aging agent, tackifying resin, carbon black, zinc methacrylate and maleic anhydride grafted polybutadiene, mixing for 120-180 s to enable all components to be uniformly dispersed in the rubber, then placing the mixed rubber on an open mill, adding sulfur and a bridging agent, pouring rubber, turning for 100-180 s, and then placing the mixed rubber for standby.
The working principle of the invention is introduced: the energy dissipation core material is a metal material used in the composite damper, a constraint composite layer structure is additionally arranged on the surface of the metal material, the constraint composite layer is mainly made of rubber, a specially-made hardening reinforcing material zinc methacrylate is added, a reinforced framework bonding material maleic anhydride grafted polybutadiene is matched, after the special bridging agent is matched with a conventional filler, the constraint composite layer has higher hardness and strength, meanwhile, the rubber material and the metal material have certain bonding capacity in the vulcanization process, the framework material in the rubber material is uniformly stressed and deformed, and the framework material is further added in the constraint composite layer rubber, so that higher elastic rigidity is provided while certain deformation capacity is achieved. The composite damper prepared by wrapping the material and the structure of the constrained composite layer around the metal with low yield point is full in energy consumption and stable in fatigue.
The beneficial effects of the invention are introduced as follows: the rubber of the constraint composite layer and the energy dissipation core material is adhered to the energy dissipation core material during vulcanization, so that the core material is effectively constrained, the deformation process of the core material is more uniform, stress concentration is reduced, and the situation that metal in the damper can permanently extrude softer viscoelastic material to enter a steel plate interlayer due to uneven deformation can be effectively prevented. The maleic anhydride and the polar group on the fiber surface or the metal surface form a strong reaction, and the butadiene and the polymer are co-crosslinked to play a role in bridging. Therefore, the addition of the zinc methacrylate and the maleic anhydride grafted polybutadiene not only greatly improves the tear strength and hardness of the rubber, but also improves the adhesion between the rubber and the framework material, increases the strength and rigidity of the constraint composite layer, and simultaneously partially constrains the rubber of the composite layer and the energy-consuming core material to be adhered to the energy-consuming core material during vulcanization, so that the core material is effectively constrained, the deformation process of the core material is more uniform, the stress concentration is reduced, and the performance of the viscoelastic damper is integrally improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a composite damper;
FIG. 2 is a schematic structural view of a constraining composite layer;
FIG. 3 is a displacement-load curve for experiment 5;
FIG. 4 is a displacement-load curve for experiment 6;
FIG. 5 is a displacement-load curve for experiment 7;
FIG. 6 is a schematic view of the expanded metal structure of the framework material;
fig. 7 is a perspective view of a composite damper.
Wherein: the material comprises 1-an outer shearing connecting plate, 2-a middle shearing connecting plate, 3-a viscoelastic material, 4-an energy-dissipation core material, 5-a constraint composite layer and 6-a framework material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1: constrained composite material for energy dissipating core material
The constrained composite material comprises a special rubber material, wherein the special rubber material comprises zinc methacrylate and maleic anhydride grafted polybutadiene. The special rubber material comprises the following components in parts by weight: 100 parts of diene rubber, 10-70 parts of white carbon black or carbon black, 0-30 parts of zinc methacrylate, 0-3 parts of an anti-aging agent, 0-3 parts of a bridging agent, 0-3 parts of sulfur, 1-3 parts of an activation system, 0-10 parts of tackifying resin and 0-15 parts of maleic anhydride grafted polybutadiene. The bridging agent comprises a resin curing agent or a peroxide crosslinking agent.
Preferably, the diene rubber is 60-100 parts of butadiene rubber and 40-0 part of natural rubber; the mass ratio of the white carbon black or the carbon black to the stearic acid is 10-30: 40-20 parts of; 15-25 parts of zinc methacrylate, 0-3 parts of anti-aging agent, 1-2 parts of bridging agent, 0.5-1.5 parts of sulfur, 1-3 parts of activation system, 5-10 parts of tackifying resin and 5-15 parts of maleic anhydride grafted polybutadiene.
The divalent Zn2+ ion of zinc methacrylate with positive charge between two carboxyl anions can easily act as an ion bridge bond, and meanwhile, the metal surface ion and the Zn2+ ion are attracted by electrostatic force to generate strong adhesive force. Untreated synthetic fibers have smooth surfaces, high modulus, far different polarity from rubber, and very low binding affinity, and therefore, generally, the fibers need to be surface treated in advance during the bonding process with rubber. After maleic anhydride in the maleic anhydride grafted polybutadiene is grafted with polybutadiene, the maleic anhydride and polar groups on the fiber surface or the metal surface form a strong reaction, and butadiene and a polymer are subjected to co-crosslinking to play a bridging role. Therefore, the addition of the zinc methacrylate and the maleic anhydride grafted polybutadiene not only greatly improves the tear strength and hardness of the rubber, but also improves the adhesion between the rubber and the framework material, increases the strength and rigidity of the constraint composite layer, and simultaneously partially constrains the rubber of the composite layer and the rubber of the energy-consuming core material to be adhered to the energy-consuming core material during vulcanization, so that on one hand, the core material is effectively constrained, on the other hand, the deformation process of the core material is more uniform, and the stress concentration is reduced.
Example 2: restraint composite bed that power consumption core was used
The energy consumption core material is prepared by overlapping the special rubber and the framework material in the embodiment 1, is used for being adhered to the surface of the energy consumption core material 4 and forming a local or overall package on the energy consumption core material, and can restrain the energy consumption core material from uniformly deforming and prevent the energy consumption core material from excessively deforming or being extruded into a viscoelastic material layer in the deformation process. The surface bonding of the restraint composite layer and the energy consumption core material is vulcanization bonding; at least one layer of special rubber and framework material are crossed or paved to form a composite rubber layer; the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene. The framework material 6 is a metal wire, a metal net or a metal pipe.
In order to increase the adhesion effect of zinc methacrylate and maleic anhydride grafted polybutadiene to the skeleton material and the reinforcing effect thereof on the rubber, a bridging agent is preferably added to the rubber formulation, and the bridging agent is preferably an organic peroxide such as dicumyl peroxide, benzoyl peroxide, 2, 5-dimethyl-2, 5-bis (t-butylperoxy) hexane and the like. The addition of the bridging agent enables the acrylate and the polybutadiene to form C-C cross-linking bonds, and provides higher bond energy and tensile strength.
Preferably, in order to improve the deformation damage resistance and resilience of the restraint composite layer, the restraint composite layer is preferably formed by compounding a steel wire or a metal wire mesh with rubber, the steel wire is preferably made of 0Cr18Ni9Ti and 1Cr18Ni9Ti in the wire diameter of 0.3-1.2 mm, and the metal wire mesh is preferably made of 0Cr18Ni9Ti, 1Cr18Ni9Ti and 06Cr19Ni10 and processed into a mesh tube with the thickness of less than 1.5 mm. The selected metal material has high tensile strength and elongation rate of over 60 percent, and particularly, after the metal material is processed into metal rubber to be pressed into a metal net, the elastic deformation of the metal rubber is greatly improved, and the metal rubber are compounded to ensure that the whole restraint composite layer has higher deformability and rebound resilience.
Example 3: composite damper
As shown in fig. 1, the composite damper includes: the energy-consumption-prevention energy-saving device comprises an outer shearing connecting plate 1, a middle shearing connecting plate 2, a viscoelastic material 3, an energy-consumption core material 4 and a constraint composite layer 5 which is bonded and wraps the energy-consumption core material 4; the constrained composite layer is the constrained composite structure in the embodiments 1 and 2, and comprises special rubber and a framework material 6 which are laminated, wherein the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene. The energy dissipation core material is a metal bar with a low yield point, the middle shearing connecting plate is provided with a through hole with a corresponding diameter, and the outer shearing connecting plate is provided with a blind hole with a corresponding diameter; the viscoelastic material is rubber elastic material or high damping rubber; the low-yield-point metal bar penetrates through the through hole and is arranged in the corresponding blind hole; the framework material is a steel wire, a fiber or a metal net, and is crossed or tiled with a special rubber material to form a model; and the constraint composite layer wraps the periphery of the low-yield-point metal bar and is subjected to main body vulcanization bonding molding with the outer shear connecting plates and the viscoelastic materials on the two sides.
Specifically, the method comprises the following steps: the shearing steel plate and the viscoelastic material are overlapped into a sandwich structure, and the restraint composite layer wraps the periphery of the low-yield-point metal bar and is vulcanized, bonded and molded with the main body between the connecting steel plate and the viscoelastic material. The shear connection plate is made of carbon structural steel, the middle shear connection plate is provided with a through hole with a corresponding diameter, and the outer side connection steel plate is provided with a blind hole with a corresponding diameter; the viscoelastic material is rubber elastic material or high damping rubber; the low yield point metal is lead, tin and other low yield point metals. The constraint composite layer wraps the periphery of the low-yield-point metal bar and vertically penetrates through the middle connecting steel plate and the viscoelastic material to be embedded into the blind hole of the outer connecting steel plate.
The addition of the zinc methacrylate and the maleic anhydride grafted polybutadiene not only greatly improves the tear strength and hardness of the rubber, but also improves the adhesion between the rubber and the framework material, increases the strength and rigidity of the constraint composite layer, and simultaneously partially constrains the rubber of the composite layer and the energy-consuming core material to be adhered to the energy-consuming core material during vulcanization, so that on one hand, the core material is effectively constrained, on the other hand, the deformation process of the core material is more uniform, and the stress concentration is reduced.
Example 4: preparation method of constrained composite material for energy dissipation core material
The method comprises the following steps: preparing components including zinc methacrylate and maleic anhydride grafted polybutadiene, and weighing the components in proportion; firstly plasticating the rubber in an internal mixer for 60-120 s to enable the plasticity of the rubber to reach 0.3-0.4, then sequentially adding an activation system, an anti-aging agent, tackifying resin, carbon black, zinc methacrylate and maleic anhydride grafted polybutadiene, mixing for 120-180 s to enable all components to be uniformly dispersed in the rubber, then placing the mixed rubber on an open mill, adding sulfur and a bridging agent, pouring rubber, turning for 100-180 s, and then placing the mixed rubber for standby.
More specifically: preparing the special rubber material raw materials described in the embodiments 1 and 2, weighing various materials according to the proportion of the constrained composite layer rubber composition, firstly plasticating the rubber in an internal mixer for 60-120 s to enable the plasticity of the rubber to reach 0.3-0.4, then sequentially adding an activation system, an anti-aging agent, tackifying resin, carbon black, zinc methacrylate and maleic anhydride grafted polybutadiene, mixing for 120-180 s to enable the components to be uniformly dispersed in the rubber, then placing the mixed rubber on an open mill, adding sulfur and a bridging agent, pouring and turning for 100-180 s, and then placing the mixed rubber for standby. The framework metal wire and the restraint layer rubber are crossed, tiled, preformed and overlapped into the composite rubber layer according to corresponding design requirements on an open mill, a calender and a steel wire tractor, preferably, the metal wire can be prefabricated into a metal mesh tube, and the inner surface and the outer surface of the metal mesh tube are attached with the rubber and preformed into the restraint composite layer. And coating the restraint composite layer on the outer side of the low-yield-point metal, penetrating the restraint composite layer through the middle shear connecting plate and the viscoelastic material, inserting the restraint composite layer into the blind hole of the outer restraint plate, and performing heat preservation and pressure maintaining for a period of time to form the metal composite damper in a cross-linking mode.
Experimental example 1
The specially-made rubber material in the constrained composite material for the energy dissipation core material comprises the following components in percentage by weight:
100 parts of diene rubber, 15 parts of white carbon black, 20 parts of carbon black, 5 parts of zinc methacrylate, 3 parts of an anti-aging agent, 2 parts of sulfur, 3 parts of an activation system and 5 parts of tackifying resin.
Experimental example 2
The specially-made rubber material in the constrained composite material for the energy dissipation core material comprises the following components in percentage by weight:
100 parts of diene rubber, 15 parts of white carbon black, 20 parts of carbon black, 10 parts of zinc methacrylate, 3 parts of an anti-aging agent, 2 parts of sulfur, 3 parts of an activation system, 5 parts of tackifying resin and 1 part of a bridging agent.
Experimental example 3
The specially-made rubber material in the constrained composite material for the energy dissipation core material comprises the following components in percentage by weight:
100 parts of diene rubber, 15 parts of white carbon black, 20 parts of carbon black, 15 parts of zinc methacrylate, 3 parts of an anti-aging agent, 2 parts of sulfur, 3 parts of an activation system and 5 parts of tackifying resin. 5 parts of maleic anhydride grafted polybutadiene and 1 part of bridging agent
Experimental example 4
The specially-made rubber material in the constrained composite material for the energy dissipation core material comprises the following components in percentage by weight:
100 parts of diene rubber, 15 parts of white carbon black, 20 parts of carbon black, 15 parts of zinc methacrylate, 3 parts of an anti-aging agent, 2 parts of sulfur, 3 parts of an activation system and 5 parts of tackifying resin. 10 parts of maleic anhydride grafted polybutadiene and 1.5 parts of bridging agent
Wherein, the problems of roll sticking and difficult processing can be caused after the using amount of the zinc methacrylate is more than 20 parts, so the using amount is recommended to be not more than 20 parts; the use amount of the maleic anhydride-grafted polybutadiene is not more than 20 parts because the hardness and strength of the vulcanizate tend to be lowered, and it is recommended that the amount is not more than 20 parts.
The constrained composite layer rubber material provided in the experimental examples 1-4 is used. Testing the tensile strength of the vulcanized sample strip by using a universal tester according to GB/T528-1998 at the testing speed of 500 mm/min; the specimens were tested for Shore A hardness according to GB/T531-1999. The mechanical properties of the materials are shown in table 1.
TABLE 1 mechanical Properties of constrained composite layer rubber
The constrained composite layer rubber material provided in the experimental examples 1-4 is used. The tensile shear strength of the bond between the vulcanized rubber and the metal was tested by a universal tester according to GB-T13936. Table 2 shows the bond strength between the constrained rubber and the metal
TABLE 2 bond Strength of constraint rubber to Metal
| Adhesive strength/Mpa | |
| Experimental example 1 | 1.2 |
| Experimental example 2 | 2.1 |
| Experimental example 3 | 3.3 |
| Experimental example 4 | 4.3 |
Experimental example 5 the materials were constrained by the experimental example 1 without adding a framework material;
experimental example 6 the materials were constrained in experimental example 4 without the addition of the framework material,
experimental example 7 the material plus wire mesh was constrained as in experimental example 4.
Respectively preparing the composite dampers containing 4 lead rods with the diameter of 75 mm. The test is carried out by adopting GJ/T209 plus 2012 construction energy dissipation damper, and the test result is shown in Table 3
TABLE 3 composite damper Performance test
As shown in table 3, the composite damper prepared by using the constrained composite layer structures provided in experimental examples 5 to 7 has a yield force increased with the hardness of the constrained composite layer rubber and the increase of the skeleton material.
As shown in FIGS. 3 to 5, the load-displacement curves of the composite damper under different displacements are tested by adopting the constrained composite layers provided in the experimental examples 5 to 7
Example 7 Displacement vs. load Curve
FIGS. 3-5 examples 5-7 composite damper displacement load curves
The composite damper is prepared by adopting the constrained composite layer structures provided by the experimental examples 5-7, the hysteresis curve of the composite damper is gradually full, and the fatigue energy consumption is more stable.
It is to be understood that the foregoing specific experimental modes of the invention are merely illustrative of or illustrative of the principles of the present invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A constraint composite material for an energy dissipation core material is used in the technical field of building shock absorption for reducing motion energy and on equipment and equipment, and is characterized by comprising a special rubber material, wherein the special rubber material comprises zinc methacrylate and maleic anhydride grafted polybutadiene.
2. The constraining composite of claim 1, wherein the tailored rubber material comprises the following composition by weight:
100 parts of diene rubber, 10-70 parts of white carbon black or carbon black, 0-30 parts of zinc methacrylate, 0-3 parts of an anti-aging agent, 0-3 parts of a bridging agent, 0-3 parts of sulfur, 1-3 parts of an activation system, 0-10 parts of tackifying resin and 0-15 parts of maleic anhydride grafted polybutadiene.
3. The constraining composite of claim 1 or 2, wherein the bridging agent comprises a resin curing agent or a peroxide crosslinking agent.
4. The constrained composite material according to claim 1, wherein the diene rubber is 60 to 100 parts of butadiene rubber, 40 to 0 part of natural rubber; the mass ratio of the white carbon black or the carbon black to the stearic acid is 10-30: 40-20 parts of; 15-25 parts of zinc methacrylate, 0-3 parts of anti-aging agent, 1-2 parts of bridging agent, 0.5-1.5 parts of sulfur, 1-3 parts of activation system, 5-10 parts of tackifying resin and 5-15 parts of maleic anhydride grafted polybutadiene.
5. A constraint composite layer for an energy consumption core material is characterized by comprising a special rubber and a framework material which are laminated, wherein the special rubber is used for being bonded with the surface of the energy consumption core material and forming a local or overall package on the energy consumption core material, and the constraint composite layer can constrain the energy consumption core material to be uniformly deformed and prevent the energy consumption core material from being excessively deformed or being extruded into a viscoelastic material layer in the deformation process.
6. The constraining composite layer of claim 5, wherein the surface bond of the constraining composite layer to the energy dissipating core material is a cured bond; at least one layer of special rubber and framework material are crossed or paved to form a composite rubber layer; the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene.
7. The constraining composite layer of claim 5, wherein: the special rubber material comprises the following components in parts by weight:
100 parts of diene rubber, 10-70 parts of white carbon black or carbon black, 0-30 parts of zinc methacrylate, 0-3 parts of an anti-aging agent, 0-3 parts of a bridging agent, 0-3 parts of sulfur, 1-3 parts of an activation system, 0-10 parts of tackifying resin and 0-15 parts of maleic anhydride grafted polybutadiene;
the framework material is a metal wire, a metal net or a metal pipe.
8. The preparation method of the constrained composite material for the energy dissipation core material is characterized by comprising the following steps of: preparing components including zinc methacrylate and maleic anhydride grafted polybutadiene, and weighing the components in proportion; firstly plasticating the rubber in an internal mixer for 60-120 s to enable the plasticity of the rubber to reach 0.3-0.4, then sequentially adding an activation system, an anti-aging agent, tackifying resin, carbon black, zinc methacrylate and maleic anhydride grafted polybutadiene, mixing for 120-180 s to enable all components to be uniformly dispersed in the rubber, then placing the mixed rubber on an open mill, adding sulfur and a bridging agent, pouring rubber, turning for 100-180 s, and then placing the mixed rubber for standby.
9. A compound damper comprising: the energy dissipation core material is characterized by further comprising a constraint composite layer which is bonded with and wraps the energy dissipation core material, wherein the constraint composite layer is formed by laminating special rubber and a framework material, and the special rubber comprises zinc methacrylate and maleic anhydride grafted polybutadiene.
10. The composite damper as claimed in claim 9, wherein the energy dissipating core material is a low yield point metal bar, the middle shear web is provided with through holes of corresponding diameter, and the outer shear web is provided with blind holes of corresponding diameter; the viscoelastic material is rubber elastic material or high damping rubber; the low-yield-point metal bar penetrates through the through hole and is arranged in the corresponding blind hole; the framework material is a steel wire, a fiber or a metal net, and is crossed or tiled with a special rubber material to form a model; and the constraint composite layer wraps the periphery of the low-yield-point metal bar and is subjected to main body vulcanization bonding molding with the outer shear connecting plates and the viscoelastic materials on the two sides.
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| CN202111002008.8A Pending CN114133634A (en) | 2021-08-30 | 2021-08-30 | Constraint composite material and composite layer for energy dissipation core material, preparation method of constraint composite material and composite damper |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003214493A (en) * | 2001-10-22 | 2003-07-30 | Toyo Tire & Rubber Co Ltd | Laminated rubber bearing device and its manufacturing method |
| JP2005320376A (en) * | 2004-05-06 | 2005-11-17 | Bando Chem Ind Ltd | Rubber composition for seismic isolation laminate and seismic isolation laminate using the same |
| CN104060724A (en) * | 2014-06-09 | 2014-09-24 | 同济大学 | Energy-consumption shear wall made of composite material |
| CN216007380U (en) * | 2021-08-30 | 2022-03-11 | 河北震安减隔震技术有限公司 | Constraint composite layer for energy dissipation core material and composite damper using same |
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2021
- 2021-08-30 CN CN202111002008.8A patent/CN114133634A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003214493A (en) * | 2001-10-22 | 2003-07-30 | Toyo Tire & Rubber Co Ltd | Laminated rubber bearing device and its manufacturing method |
| JP2005320376A (en) * | 2004-05-06 | 2005-11-17 | Bando Chem Ind Ltd | Rubber composition for seismic isolation laminate and seismic isolation laminate using the same |
| CN104060724A (en) * | 2014-06-09 | 2014-09-24 | 同济大学 | Energy-consumption shear wall made of composite material |
| CN216007380U (en) * | 2021-08-30 | 2022-03-11 | 河北震安减隔震技术有限公司 | Constraint composite layer for energy dissipation core material and composite damper using same |
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