Basic Info.
Name
Bridge Isolation Bearing
Application
Highway&Bridge
Features
High Durability and No Maintenance
Certificate
ISO:9001:2008/SGS
Main Material
Rubber, Steel, PTFE
Special Service
Custom Service Offered
Transport Package
Wooden Case or as You Demanded
Specification
Customized Size
Product Description
NRT pot bearings ensure the transfer of loads between a structure's superstructure and its sub-structure. Meanwhile they can accommodate rotation and movements of the superstructure. NRT POT bearings are generally suitable for the use in any type of structure, and can be subjected to low or high loading and frequent movements and rotation.
NRT pot bearings are designed and manufactured acc. to customer requirements, in accordance with relevant standards such as EN 1337, AASHTO, BS5400 or AS 5100.a.
Structure
Rubber Physical&Mechanical Properties
| Physical Properties |
| Physical Properties | CR | NR | EPDM |
| Hardness | 60±5 | 60±5 | 60±5 |
| Tensile Strength/Mpa ≥ | 17 | 18 | 15 |
| Elongation at Break/% ≥ | 400 | 450 | 350 |
| brittleness temperature(ºC) ≤ | -40 | -50 | -60 |
| EN Compression Set(70ºC*24h)/% ≤ | 15 | 30 | 25 |
| Ozon Resistance(20% elongation, 40ºC*96h) | 100*10-3 | 25*10-8 | 100*10-8 |
Air Oven Aging(Max change, comparing with
datas without aging) | Test Conditions(ºC*h) | No Crack | No Crack | No Crack |
| Tensile Strength(%) ≤ | 100*70 | 70*168 | 100*70 |
| Elongation at Break/% ≤ | 15 | 15 | 15 |
| Hardness Change | 40 | 20 | 40 |
| Peel Strength between Rubber and Steel(kN/m) ≥ | 0~+10 | -5~+10 | 0~+10 |
| Peel Strength between Rubber and PTFE(kN/m) ≥ | 10 | 10 | 10 |
| Mechnical Properties |
| Ultimate Compressive Strength Ru(MPa) | ≥70 |
| Measure of Compressive Elastic Mould E1(MPa) | E±E*30% |
| Measure of Shear Elastic Mould G1 (MPa) | G±G*15% |
| Measure of Shear Elastic Mould after Aging G2 (MPa) | G1±G1*15% |
Measure Corner Tangent tgθ | Concrete Bridge | ≥1/300 |
| Steel Bridge | ≥1/500 |
| Measure Friction Coefficient μf (with grease) | ≤0.03 |
Steel
The austenitic steel used for sliding surfaces is X5CrNiMo17-12-2 in accordance with EN 10088-2 1.4401 with a minimum thickness of 1.5 mm. The roughness is Ry5i ≤ 1 μm, The hardness ≥ 150 HV1 and ≤ 220 HV1.
PTFE
NRT uses only virgin PTFE without regenerated or filler materials.
The minimum thickness for bonded PTFE is 1.5 mm and varies in according with the bearings size and type.
The minimum thickness of recessed PTFE is 4.5 mm and varies in according with the bearings size.
Different Types Bridge Bearings
Rubber Bearing
Pot Bearing
Spherical Bearing
| | Pot Bearing | Spherical Bearing | Rubber Bearing |
| Vertical Load | High | High | Medium |
| Horizontal Displacement | No Limits | No Limits | Medium |
| Rotation | Medium | High | Low-Medium |
| Dimension | Small-Medium | Small-Medium | High |
Features
1, With low-profile yet high loading capability over 50,000 KN.
2, Maximized shearing strength of elastomer pad through the method of encasing it in the steel pot.
3, Allow for large rotations ranging from 0 to 0.03 rad.
4, Low friction coefficient between 1% and 3%.
5, Excellent fatigue, impact and aging resistance of the layer of PTFE.
6, All the metallic parts are protected against corrosion by galvanization and epoxy painting according to EN 1337-9 (other protective coatings are available as your requirements).
7, Complying with BS EN-1337, KS4424, AASHO, ISO or other custom standards.
Feature of Lead Rubber Bearing :
Bridge Pot Bearings have been designed to be very easy to install, maintenance-free and cost-effective.Bridge Pot Bearings are designed for very high vertical, horizontal and lateral loads and where rotational structural displacements need to be accommodated.
Application of Lead Rubber Bearing :
The product has been successfully used in a broad range of applications which include: bridges, viaducts, high rise buildings, stadiums and dams.
Lead Rubber Bearing is classified as three types:
fixed bearing (restriction of all movement in planar axis);
guided bearing (restriction of movement in one direction in planar axis);
multi-directional bearing (allows movement in all planes and axes).
All three types can be designed to accommodate uplift loads, often required during construction or the life of the structure. The bearings are designed to be quickly and easily replaced due to the structural fastening and attachment strategy BL deploys.
Other marks:All of Bridge Pot designs, materials & fabrication processes can be adapted to client required manufacturing specifications or codes of practice; for any country. The bearing is designed to be maintenance free for the duration of its design life and operate down to extremely low temperatures, as low as -40 degrees Centigrade.
Technical parameter
| Vertical bearing capacity: 204kN -21206kN |
| Design angle: 0.006rad and 0.008rad |
| Equivalent damping ratio: >10% |
| Bearing displacement: sliding type bearing along the bridge to the design displacement of two kinds of 100mm and 150mm, the transverse bridge to the design displacement is + 30mm; fixed type normal design shear strain is 1, the earthquake is 2 |
| Friction coefficient: friction coefficient of sliding bearing design is 0.03 |
| Applicable temperature range: -40C -60C |
Address:
Yangmuqi Road, Industrial Park, Ningbo, Zhejiang, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Manufacturing & Processing Machinery, Transportation
Management System Certification:
ISO 9001, IATF16949
Company Introduction:
Zhenjiang sweet marine propeller Co., Ltd is a manufacturer for marine equipment, which is the subsidiary company for the NRT marine group company. The trading office located in zhejiang, which was one of the largest industrial cities in eastern coastal of China,
The main products we can export is marine propeller and shaft, outfitting, floating pontoon, marine anchor, anchor chain, windlass...Our company is widely recognized by global consumers in maritime feild as a leading company based on its excellent quality and strong competiveness. We export marine equipment to more than 80 countries. We have been continuously improving and developing our products since being selected as a prospective exporting company and has CCS, ABS, LR...Certified company in 2010.
From now on, NRT marine is going forward armed with excellent stratigies and with high quality to be a reliable company for overseas customers.
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