Reinforced elastomeric bearing for engineering structures

 

(57) Abstract:

Reinforced elastomeric bearing can be used in the construction and maintenance of engineering structures, particularly bridges, and consists of an armature in the form of steel plates located between the intermediate elastomeric layer and an outer elastomeric layer. All layers are made of rubber based on a combination of butyl rubber and ethylene-propylene-diene rubber in the ratio of 40-80% by 20-60%, respectively. Reinforced elastomeric bearing for engineering structures has high low temperature performance characteristics. 1 table, 1 Il.

The invention relates to the construction and maintenance of engineering structures, particularly bridges.

Known reinforced elastomeric bearing for bridges containing reinforcement in the form of steel plates located between the intermediate elastomeric layer made of rubbers on the basis of combinations of polychloroprene and butadiene-nitrile rubbers, or branch, Rubezhnoe, Ukraine and butadiene rubbers, and external elastomeric layer, made of rubber-based combinations polychloroprene and butadiene-nitrile rubber [1].

The disadvantage of Yes is the men due to low resistance of rubber elastomer layers to aging.

Known reinforced elastomeric bearing for engineering structures, particularly for bridges containing reinforcement in the form of steel plates located between the intermediate elastomeric layer and external elastomeric layer, made of rubber based on polychloroprene rubber [2].

The disadvantages of this reinforced elastomeric bearings for bridges are poor low-temperature performance, which was evaluated according to DIN 4141 part 140, paragraph 4.3.2.

The aim of the invention is to improve low-temperature performance characteristics of reinforced elastomeric bearings for engineering structures.

This goal is achieved by the fact that reinforced elastomeric bearing for engineering structures containing reinforcement in the form of steel plates located between the intermediate elastomeric layer and an outer elastomeric layer, characterized in that the intermediate and outer elastomeric layers is made of rubber based on a combination of butyl rubber and ethylene-propylene-diene rubber in the ratio of 40-80% by 20-60%, respectively.

The drawing shows a reinforced elastomeric bearing for engineering structures.

Low-temperature performance characteristics of the reinforced elastomeric bearings for engineering structures has been evaluated in terms of modulus of elasticity shear at room temperature, -30oC and -40oC according to DIN 4141 part 140, paragraph 4.3.2. the test results of reinforced elastomeric bearings for engineering structures are presented in the table, from which you can make the following conclusions:

1. Reinforced elastomeric bearings for engineering structures (2-4), made according to the invention, have lower values of modulus of elasticity shear low for prototype and reference example (6).

2. Reinforced elastomeric bearing for engineering structures (5) manufactured according to the control example, has a low modulus of elasticity shear at room temperature compared to reinforced elastomeric bearings for engineering structures made according to the invention and of the prototype.

3. Because the composition of rubber elastomeric layer reinforced elastomeric bearings for engineering structures containing a combination of butyl rubber and ethylene-propylene-diene rubber according to the invention (2-4) and reference examples (5-6) are the same, made a positive effect is achieved only at the expense of the applied combination of butyl rubber and ethylene-propylene-diene rubber in proportions according to the invention.

4. High low temperature performance characteristics of the reinforced elastomeric bearings for engineering structures can be obtained only by using technical solutions according to the invention.

Sources of information

1. Instructions for the design and installation of polymer support parts of bridges. VSN 86-83. M., 1983, paragraph 4.1.

2. The German standard DIN 4141 part 140, 1991, items: 2.1.2., 3.2. the prototype.

located between the intermediate elastomeric layer and an outer elastomeric layer, characterized in that the intermediate and outer elastomeric layers is made of rubber based on a combination of butyl rubber and ethylene-propylene-diene rubber in the ratio of 40-80% by 20-60%, respectively.

 

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