Ultrahigh-damping rubber support base and manufacturing method thereof

Abstract

The invention discloses an ultrahigh-damping rubber support base. A support base rubber sheet is a composite rubber sheet which is formed by a middle rubber layer and an encapsulated layer, wherein the composite rubber sheet is a composite rubber sheet I or a composite rubber sheet II; the middle rubber layer of the composite rubber sheet I is rubber A, and the encapsulated layer is rubber B or can be M layers of alternatively coated rubber B and rubber A; the middle rubber of the composite rubber sheet II is rubber B, and the encapsulated layer can be N layers of alternatively coated rubber Aand rubber B; the rubber A is high-energy-dissipation damping rubber, and the rubber B is highly-elasticity rubber, and the highly-elastic rubber accounts for 5%-90% of the total volume of the rubbersheet. A manufacturing method for the ultrahigh-damping rubber support base comprises the following steps: manufacturing a rubber A blank rubber sheet and a rubber B blank rubber sheet, manufacturinga support base rubber sheet and manufacturing a support base. The support base is simple in manufacturing, and is adjustable in performance; and the manufactured high-energy-dissipation damping rubber material is more uniform in rubber, is higher in tensile strength and elongation at break, and is affected slightly in performance by the temperature; and after external load is unloaded, the outerside surface of the support base is not liable to bulge and deform, so that scope of application is wide.

Description

technical field [0001] The invention relates to the technical field of shock-absorbing and isolating bearings for bridges and buildings and a preparation method, in particular to an ultra-high damping rubber bearing and a preparation method thereof. Background technique [0002] Lead core vibration-isolation rubber bearings, horizontally distributed rubber bearings, and ultra-high damping rubber bearings (including high-damping rubber bearings) are commonly used shock-absorbing and isolation technology-related products. Among these product types, horizontally dispersed bearings (No lead-core vibration-isolation rubber bearing) is not suitable for high-seismic areas due to poor energy dissipation capacity; lead-core vibration-isolation rubber bearing has strong energy dissipation capacity, but uses heavy metal lead, which has the problem of environmental pollution hazards; ultra-high Damping rubber bearings (including high damping rubber bearings) are favored by the market be...

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Problems solved by technology

[0002] Lead core vibration-isolation rubber bearings, horizontally distributed rubber bearings, and ultra-high damping rubber bearings (including high-damping rubber bearings) are commonly used shock-absorbing and isolation technology-related products. Among these product types, horizontally dispersed bearings (No lead-core vibration-isolation rubber bearing) is not suitable for high-seismic areas due to poor energy dissipation capacity; lead-core vibration-isolation rubber bearing has strong energy dissipation capacity, but uses heavy metal lead, which has the problem of environmental pollution hazards; ultra-high Damping rubber bearings (including high damping rubber bearings) are favored by the market because of their damping performance and environmental protection, and are widely used in engineering. However, the existing ultra-high damping rubber bearings have the following defects:

[0004] 2. In engineering, the performance of ultra-high damping rubber bearings (horizontal equivalent stiffness, horizontal equivalent damping ratio, etc.) often needs to be changed according to the actual situation. In order to realize the change of bearing performance, only by adjusting the rubber formula of the bearing , and due to the complexity of the formula of high energy-consuming damping rubber, it is not only very difficult to adjust, but even if it is adjusted, it is difficult to meet the performance requirements;

[0005] 3. Due to the need to add some specific filler materials (such as some resin materials) to the formula of high-energy damping rubber, these materials will make the temperature sensitivity of high-energy damping rubber very high, making (ultra) high-damping rubber made of this type of rubber The performance of the bearing is greatly affected by temperature changes, which greatly limits the use area of ​​the bearing

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