High Damping Isolation Natural Rubber bearing Seismic Isolators

High Damping Isolation Natural Rubber bearing Seismic Isolators

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Quick Details

Model Number:: LCGZ001

Material:: NR, CR Steel

Application:: Bridge and building

Shape:: Round, Rectangular

Function:: Earthquake Isolation

MOQ:: 1pcs

Color:: Customer's Request

Size:: Customer's Request

Certification:: ISO9001

Quality:: High Quaity

Quick Details

Processing Service:: Moulding

Place of Origin:: Hebei, China

Brand Name:: HSLC

Model Number:: LCGZ001

Material:: NR, CR Steel

Application:: Bridge and building

Shape:: Round, Rectangular

Function:: Earthquake Isolation

MOQ:: 1pcs

Color:: Customer's Request

Size:: Customer's Request

Certification:: ISO9001

Quality:: High Quaity

Product Description

High damping rubber bearing (HDR), similar with lead rubber bearing, belongs to seismic isolation bearing. It is composed of special rubber with excellent damping attribute, sandwiched together with layers of steel. Damping is an influence within or upon an oscillatory system that has the effect of reducing, restricting or preventing its oscillations. Thus, bridge bearing made of high damping rubber has excellent vibration reduction ability. Available with excellent flexibility and high restoring ability, high damping rubber bearing can absorb some input energy of the earthquake before the energy is transmitted to the substructure and can be restored after the earthquake.

Feature

* High damping rubber bearing features high vertical loading capacity, b recovery ability and high damping ability.

* Full of hysteretic behavior, high damping rubber bearing can produce seismic isolation effect for small, middle or big earthquake.

* High damping rubber bearing, itself producing the seismic isolation function, does not need install other devices. Thus, the cost of maintenance and repair is reduced.

* Temperature influences on the flexibility and damping performance of the high damping rubber bearing is extremely small, thus, high damping rubber bearing has a wide range of applied field.

* Due to adopting the new developed nature rubber, high damping rubber bearing has excellent creep property.

* Covered with EPDM, the internal rubber of the high damping rubber bearing is completely protected which is resistant to the ozone and ultraviolet, thus, the high damping rubber bearing has better aging-resistant ability.

Working Principle of High Damping Rubber Bearing:

By improving the rubber formula and increasing the damping of rubber material, the damping ratio of high damping rubber bearing
can reach 10%-18%. In the earthquake, the high damping rubber bearing produces large deformation and small stiffness, with
excellent seismic effect. Because the elastic stiffness of high damping rubber bearing depends on its deformation degree.
Deformation is small, the stiffness is large, and vice versa, deformation is large, the stiffness is small. And the use of thi s
principle of high damping rubber bearing produces excellent seismic isolation function.

Types & Structures of High Damping Rubber Bearing:
* Working temperature range: -40 °C to +60 °C
* Rad: 0.006 rad and 0.008 rad
* Damping Ratio: 10% – 16%

Type 1: The bearing, pier, and beam are to be connected with sleeve and bolt. The top and bottom of the bearing are embedded steel plates. The upper and lower bearing steel plate, and the sleeve are connected with bolts. The upper and lower embedded steel plate and the sleeve are welded together.

Type 2: The bearing, pier, and beam are connected by sleeve and bolt; the bottom of the bearing is not embedded steel plate, the bottom sealing plate and sleeve are connected by bolt, the upper embedded steel plate and the upper sealing plate are connected by shear tenon, the upper embedded steel plate and sleeve are welded together.

Specification

Technical index			Neoprene Rubber	Natural Rubber
Hardness (IRHD)			60±5	60±5
Strength Tensile (Mpa)			≥17	≥18
Elongation at break (%)			≥400	≥450
Brittleness temperature (℃)			≤40	≤-50
Constant compression permanent deformation			≤15	≤30
Resistance to ozone aging test (test conditions，20% elongation,40℃×96h)			100ppmm	25ppmm
				No cracking	No cracking
Hot air aging test (The biggest change comparing with before aging numerical)	Test conditions (℃×h)	100×70	70×168
		Strength Tensile (%)	-15	-15
		Elongation at break(%)	-40	-20
		Variation in hardness(IRHD)	0，+10	-5，+10
Strength of rubber and steel Peel adhesive (KN/m)			>10	>10
Strength of four fluorine plate and rubber (KN/m)			>7	>7

◊ Stiff and strong in vertical direction but flexible in horizontal direction.
◊ Absorb earthquake-generated force by changing the bearing’s shape.
◊ Allow the buildings to retain their original shapes and position owing to the high elastic force of rubber.
◊ Capable to adjust damping amount just by changing the number of lead plugs.
◊ Excellent vertical load capacity ranging from 5 tonf to 2000 tonf.
◊ Reduce the ground acceleration by extending the structure vibration period.
◊ High durable and elasticity of the rubber part - not suffer any damages during and after earthquake.
◊ Easy to install without a separated damper.
◊ Low maintenance.
◊ With stable bi-linear behavior shown as the above picture.

Product packaging

FAQ

Hengshui Lu Chen New Material Technology Co., LTD.

1. who are we?
We are based in Hebei, China, start from 2013,sell to Domestic Market(40.00%),Southeast Asia(23.00%),Africa(16.00%),North
America(7.00%),South America(7.00%),Western Europe(7.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Bridge Expansion Joint,Rubber Waterstop,Swelling Waterstop Strip,Seismic Isolation Bearing,Rubber Bearing Pad

4. why should you buy from us not from other suppliers?
1.More than 20 professional senior technical personnel. 2.There are 10 series,over 200 species and more than 2,000 specifications.
3.All products have been authenticated by the Ministry of Communications. 4.Self-research and development,professional.

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES；
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese

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