Isolation rubber bearings for building are building component products for seismic isolation and vibration absorption, which are developed in accordance with the current relevant national and industrial standards. Building isolation rubber bearings are divided into lead-core rubber bearings(LRB) and natural rubber bearings(LNR).

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Dynamic servo pressure-shear testing machine for bearings

Testing reports for bearing by the third party

Products Description

LNR

Linear rubber bearings(LNR) are made by laminating natural rubber sheets or chloroprene rubber sheets with steel plates. They possess good linear elastic properties and can significantly reduce the seismic effect on the structure and suppress the high-order responses of the structure.

Fundamental principle

The basic principle of seismic isolation by building isolation rubber bearings is to extend the natural vibration period of the whole building by adding rubber isolation bearings, so as to reduce the seismic response of the superstructure.
The general approach is to design an isolation layer at the bottom of the building and install rubber isolation bearings in the isolation layer. Utilize the horizontal flexibility of the rubber isolation bearings to form a flexible isolation layer. Through the flexible isolation layer, seismic energy is absorbed and dissipated, and the transmission of seismic energy to the superstructure is blocked and reduced. Eventually, the purpose of reducing seismic damage to the superstructure is achieved.
This seismic isolation technology can not only ensure the overall safety of the structure but also prevent the damage of non-structural components, avoid the damage to the interior decoration and indoor equipment of the building as well as the secondary disasters caused thereby.

Comparison of seismic responses between isolated structures and non-isolated structures.

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Characteristics of building isolation rubber bearings.

1, It has sufficient vertical stiffness and vertical bearing capacity. 2, The seismic isolation effect is obvious and stable. It has a sufficiently small horizontal stiffness to ensure that the fundamental period of the building is extended to 2 - 3 seconds or more than 3 seconds.
3, It has an appropriate damping ratio, which can effectively absorb seismic energy and reduce the seismic response of the superstructure.
4,It has a stable elastic reset function and can automatically and instantaneously reset during multiple earthquakes.
5,It has a simple structure and is convenient for installation, inspection and repair.
6, It has sufficient durability, and the normal service life of the product is 60 years.
7, There is abundant engineering application experience and it has successfully withstood the test of real earthquakes.
8, It has characteristics such as resistance to repeated loads, fatigue and aging.
9, It is applicable to adverse environmental conditions such as the marine environment.