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LRB Seismic Isolation Bearings for Earthquake Resistant Structures

China LRB Seismic Isolation Bearings for Earthquake Resistant Structures, Find details about China Seismic Isolation Systems, Base Isolation System from LRB Seismic Isolation Bearings for Earthquake Resistant Structures

Model NO.
LRB
Trademark
HD
Transport Package
as Request
Specification
LRB
Origin
China
HS Code
4016999090
Model NO.
LRB
Trademark
HD
Transport Package
as Request
Specification
LRB
Origin
China
HS Code
4016999090
LRB Seismic Isolation Bearings for Earthquake Resistant Structures

Seismic Isolation or also know as base isolation consist of a laminated rubber and steel bearing with steel flange plates for mounting to the structure. 90% of our isolators have an energy dissipating lead core.

The rubber in the isolator acts as a spring. It is very soft laterally but very stiff vertically. The high vertical stiffness is achieved by having thin layers of rubber reinforced by steel shims. These two characteristics allow the isolator to move laterally with relatively low stiffness yet carry significant axial load due to their high vertical stiffness. The lead core provides damping by deforming plastically when the isolator moves laterally in an earthquake.

Isolators from 200 to 1200 mm in diameter and capacities of up to 3000 tons are
manufactured. Custom dimensions are available for special applications.

The shims for isolators are cut to exacting tolerances by laser. The steel mounting plates are machined by computer controlled milling machines that give high production throughput and accuracy. Molding each bearing takes 8 to 48 hours depending on the size of the bearing. The curing phase is continuously monitored to ensure that the rubber is uniformly cured throughout the bearing.


LRB Seismic Isolation Bearings for Earthquake Resistant Structures
LRB Seismic Isolation Bearings for Earthquake Resistant Structures
JT/T4-2004BS5400 Section 9.2 
Natural RubberNeoprene
CR		Natural
Rubber		Neoprene
CR
60±560±550±5/60±5/70±5
18171715.5
450400450/400/350400/350/300
70 o C×22h70 o C×22h100 o C×22h
<30<15<30<35
70 o C×168h100 o C×70h70 o C×168h100 o C×48h
-5,+100,+10<10<15
<15<15
<20<40<20<40
25~50pphm,20% strain25~50pphm,20% strain
40 o C×96h30 o C×96h
 No CracksNo Cracks

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