JP3853872B2 - LAMINATE MANUFACTURING METHOD, LAMINATE BY THE SAME, AND SEISMIC-BASED STRUCTURE USING THE LAMINATE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method of manufacturing a laminated body used for a connecting part or a buffering part of a structure such as a cushioning material between a bridge or a highway girder and a leg, and the laminated body, and further to a seismic isolation structure using the laminated body .
[0002]
[Prior art]
For example, the structure of the end of the girder on the leg of the highway is the structure shown in FIG. In the figure, 1 is a leg, 2 is a girder, and an installation part 3 protrudes from the end of the girder 2, and this installation part 3 is installed on the upper surface of the leg 1 via a seismic isolation material 4 made of rubber. The opposite ends of the opposite beams 2 are connected by a connecting member 5. Reference numeral 6 denotes a falling beam prevention wall formed on the leg 1.
[0003]
[Problems to be solved by the invention]
In places such as girder and leg structure installation places and falling girder prevention walls, in the event of an earthquake, etc., the girder may move back and forth, but the movement is attenuated or received. Cannot be moved, and the digit may be moved or the position may be shifted by slight shaking.
[0004]
In addition, since the seismic isolation material placed on the upper surface of the leg is rubber, if the structure increases the initial spring property, the deformation mode when the load is applied becomes a gradually increasing type, so the initial response is possible, but the energy There is a problem that the amount of absorption is not efficient.
[0005]
[Means for Solving the Problems]
Therefore, the present invention is to stack a desired number of laminates in a state in which an elastic material is rolled and bonded to a cloth-like body without heating, load pressure from the direction orthogonal to the lamination direction, and then mold It is characterized by a production method in which it is loaded and reacted by heating.
In addition, a desired number of fabric-like bodies made of natural, synthetic, metal, or a mixture thereof are laminated without being heated alternately with elastic materials such as natural rubber, synthetic rubber, and synthetic resin. The laminate is manufactured by the above-described method in which cloth-like bodies are laminated so that elastic materials are alternated in a direction orthogonal to, and vulcanized in a state where pressure is loaded thereon.
Further, the laminated body is disposed between the bridge pier or the expressway leg and the girder so that the laminated state is in a direction perpendicular to the loading direction to form a seismic isolation structure.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view of an installation part of a structure of a girder and a leg, FIG. 2 is a sectional view of a support material, FIG. 3 is a perspective view, and FIG. 4 is an explanatory view of a block molded body before heating, as shown in FIG. , A structure in which a desired number of fabric-like bodies 7 made of natural, synthetic, metal, or a mixture thereof are alternately laminated with elastic materials 8 such as natural rubber, synthetic rubber, and synthetic resin. In this case, the cloth-like body 7 has a structure in which one or both surfaces of the cloth-like body 7 are bonded by rolling and bonding the elastic material 8.
[0007]
A bearing member 9 is arranged between the beam 2 and the falling beam prevention wall 6 of the leg 1 in such a laminate.
The support member 9 is a long body having a V-shaped cross section, and the leg portion 10 is fixed to the falling beam prevention wall 6 and the head portion 11 is brought into contact with the end surface of the installation portion 3 of the beam 2.
Therefore, the laminated state of the support member 9 is a structure formed in parallel with the head portion 11 and the leg portion 10. In this lamination state, it is not necessary for all the lamination intervals to be the same, and it is free to change the lamination interval depending on the part. For example, it is effective to change the lamination interval sequentially from the head 11 to the leg 10. It is.
[0008]
Further, if necessary, a fixing metal plate 13 is embedded in the fixing portion 12 formed in a flange shape on the leg portion 10, or a locking projection 14 is formed on the leg portion 10 as shown in FIG. You may make it attach this latching protrusion 14 by being embedded in the falling beam prevention wall 6. FIG.
Since the method of making such a laminated structure is a laminated material of the cloth-like body 7 and the elastic material 8 unlike a single rubber, it cannot be molded by an extruder or a press-fitting machine. Therefore, first, the elastic material 8 is rolled and bonded to the cloth-like body 7 to form a belt-like body having a necessary width, and the belt-like body is cut into a shape matching the leg portion, the head, etc. As shown in FIG.
[0009]
Pressure is loaded on the thus laminated blocks from a direction orthogonal to the lamination direction (preloading step). The pressure in this case is a pressure that exceeds at least the loading pressure during the heating (vulcanization) reaction, and is, for example, about 80 kg / cm ² .
In this way, the block loaded with pressure is loaded into a molding die, and thereafter, the product is completed by the same process as the rubber vulcanization process.
[0010]
In addition, when providing the metal plate 13 in the fixing | fixed part 12, you may embed | buy in said lamination process.
By using such a laminated body as a support material, when a load is loaded on the support material, the leg portion 10 shares the load in the initial stage, so that the spring property is also improved. In this case, since the cloth-like body 7 embedded in the cross section restrains the displacement of the elastic member 8 in the shearing direction, a hard spring in the shearing direction can be realized. This spring can be changed by changing the stacking interval of the stacks and the material of the fibers of the cloth-like body 7.
[0011]
Furthermore, when a compressive load is loaded, a deformation that causes the head 11 to enter between the leg portions 10 starts, and a buckling deformation in which only the displacement proceeds without the load increasing starts. In this case, since the elastic material 8 penetrates and enters between the cloth-like bodies 7 embedded in the head 11, it is possible to prevent impairing the independence of the leg 10 that bears the load. it can.
In addition, in order to implement | achieve such buckling deformation, it is good for the elongation rate of the cloth-like body 7 to be 10% or more.
[0012]
When a load that inclines with respect to the laminating direction is applied and a load that generates a component force in the shearing direction is applied, in the case of a conventional rubber product, the leg on the side on which the component force is applied deforms in a bent manner. On the other hand, in this invention, it deform | transforms in parallel with a component force direction. This can be seen by the appearance of the basic deformation of the laminated material in which only the elastic material 8 between the cloth-like bodies 7 embedded in the cross section is responsible for the deformation.
[0013]
Furthermore, when a load is loaded, in the case of rubber alone, the state where the head enters the leg portion proceeds, so only the reaction force rises. For example, the movement of the girder reaches this region. In some cases, the digit will be damaged. However, according to the present invention, when the head is in the limit deformation state, the ultimate state can be quantified by the tensile fracture of the cloth-like body 7 laminated inside, and the excessive energy given can be obtained. By consuming the rupture of the cloth-like body 7, even if the rupture progresses inside, the reaction force does not increase, so that the girder is not damaged (see FIG. 6).
[0014]
According to the present invention, the amount of energy absorption can be about three times that of a single rubber, which is three times that of the present invention if the support is made of a single rubber. The material volume is required.
Therefore, the support material can be made of rubber alone, but it is larger than the laminated body, but it cannot be used depending on the construction location.
[0015]
As described above, the bearing material according to the present invention can be reduced in size because of the large absorbed energy, and the installation volume is small and the mounting workability is good.
In addition to the above-described V-shaped elongated body having a cross-sectional shape, there are many forms and usage purposes. For example, by forming the plate-shaped seismic isolation material 4 disposed between the leg 10 and the installation portion 3 of the beam 2 with this laminated body, the same operation and effect as described above can be obtained.
[0016]
【The invention's effect】
According to the present invention described in detail above, it is composed of a laminated material in which a cloth-like body is laminated alternately with an elastic material in a direction orthogonal to the loading direction, so that the load is compared with that of a single rubber bearing material. Since the cloth-like body restrains the displacement of the elastic material in the shearing direction at the initial stage of loading, it has an effect that a large energy absorption amount can be realized in order to exhibit a hard spring property in a direction perpendicular to the loading direction.
[0017]
In addition, when used as a V-shaped bearing member, when the load is applied to the head with the above-mentioned hard spring performance, deformation starts so that the head enters between the legs, and the load does not increase. Only the displacement proceeds and buckling deformation occurs, which has the effect of absorbing large energy.
In addition, when a load is loaded on this support material and a limit deformation state is reached, the ultimate state can be quantified by applying a tensile fracture to the cloth-like body embedded in the elastic material, and given Excessive energy is consumed for the breakage of the internal cloth-like body, and even if the breakage progresses inside, the reaction force does not increase.
[Brief description of the drawings]
FIG. 1 is an explanatory view of an installation part of a structure of a girder and a leg. FIG. 2 is a sectional view of a support material. FIG. 3 is a perspective view. FIG. 4 is an explanatory view of a block molded body before heating. FIG. 6 is a graph showing the relationship between the reaction force and the compression amount. FIG. 7 is an explanatory diagram of a conventional example of an installation part of a girder and leg structure.
DESCRIPTION OF SYMBOLS 1 Leg 2 Girder 3 Installation part 4 Seismic isolation material 6 Falling girder prevention wall 7 Cloth body 8 Elastic material 9 Support material 10 Leg 11 Head 18 Support material

Claims (3)

A desired number of rolls of elastic material rolled and bonded to a cloth-like body are stacked without heating, and pressure is applied from the direction perpendicular to the stacking direction (preloading step), and then loaded into a molding die. A method for producing a laminate , characterized by causing a sulfur reaction. A desired number of fabrics made of natural, synthetic, metal or mixed fibers are laminated without being heated alternately with elastic materials such as natural rubber, synthetic rubber, and synthetic resin, and the laminated state is orthogonal to the loading direction. A laminate produced by the method of claim 1, wherein cloth and elastic materials are alternately laminated in a direction to be vulcanized, and vulcanized in a state where pressure is loaded thereon. A seismic isolation structure in which the laminated body according to claim 2 is arranged between a bridge or a highway leg and a girder so that the laminated state is in a direction perpendicular to the loading direction.

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