LNR (Linear Natural Rubber Bearing)

ADAPTABLE, EFFECTIVE, SAFE

Linear naturel Rubber Bearing (LNR) constitude the world’s most widespread solution fort he protection of bridges and buildings.

LINEER NATURAL RUBBER BEARING

LNR offers great seismic isolation effect and has a wide range of applications. Therefore, it is an economic and durable new seismic isolation device for buildings.

When the LNR is subject to a vertical pressure, rubber sheets and steel plates are radially deformed. However, the deformation of steel plates is much smaller than that of rubber sheets, therefore, rubber sheets are constrained by steel plates, thus limiting the vertical compression deformation of rubber sheets to ensuret hat the bearing has a higher vertical bearing capacity and provides a stable support to the building.

When the LNR is subject to a horizontal pressure, laminated steel plates cannot restrain the shear deformation of rubber sheets. At that time, the horizontal deformation of the bearing is approximately the sum of the horizontal deformation of all rubber sheets. As a result, the linear natural rubber bearing has a large horizontal deformation capacity.

FEATURES

• The strong adhesion between the rubber layer and the steel plate allows the bearing maintaining a higher vertical bearing capacity and providing a stable support for the building when a large horizontal displacement occurs.
• It prolongs the natural vibration period of the building and turns the violent shaking of the building into a slow horizontal movement.
• It has great linearity and a stable restoring force, which allows the LNR can restore the normal position quickly when it is subject to a wind- induced vibration and an earthquake.

• It requires to be used together with dampers. However, combining with different types of dampers offers great design flexibility.
• It maintains a stable performance after going through repeated earthquakes, offering an exceptional durability.
• Easy to install, maintain and replace, bringing great social and economic benefits. Seismic isolation system
• It offers great seismic isolation effect and can effectively protect the safety of buildings and personnel & devices inside.

STRUCTURE

Natural rubber bearing consists of a top and a bottom connecting steel plates, a top and a bottom sealing plates, internal natural rubber layers, internal steel plates and a rubber cover. Internal natural rubber layer ,guarantee the horizontal displacement function of the LNR. Internal steel plate layer,provide a higher load bearing capacity that allows the LNR to support buildings stably.

WORKING PRINCIPLE

By installing natural rubber bearings between the superstructure and the foundation, a seismic isolation layer is formed, achieving a soft connection with the ground to turn the violent shaking of the building into a slow horizontal movement, thereby reducing the input of seismic energy.

At the same time, the LNR separates the superstructure from the lower foundation. When the earthquake occurs, the vibration energy of the lower foundation will be transferred to the natural rubber bearing first. By taking advantage of the characteristics of the combination of rigidity and flexibility of the LNR, the transmission of seismic energy to the upper structure can be effectively avoided or reduced, thereby ensuring the safety of the superstructure and appurtenances inside. olur