LRB( lead rubber bearing) :LRB-Ⅰ、LRB-Ⅱ

The product is manufactured in accordance with EN15129 standard.

● Tailor-made: According to the specific needs of customers, recommend the most suitable products.
● Customized package: According to each project, there are independent structural design, product design, compound formula and technical service plan.
● Standards Compliant: Products meet the highest demands of national, industry and local standards. reach the international advanced level.

LRB( lead rubber bearing) :LRB-Ⅰ、LRB-Ⅱ
LRB series lead core vibration isolation rubber bearings are divided into rectangular lead core vibration isolation rubber bearings and round lead core vibration isolation rubber bearings according to the shape of the body.

The vertical load transfer process of LRB series lead-core vibration isolation rubber bearing is: beam body → upper embedded steel plate → upper connecting steel plate → upper sealing plate → laminated structure of rubber, lead core and stiffening steel plate → lower sealing plate → lower connecting steel plate → Pier.

The seismic horizontal load transfer process of the LRB series lead-core isolation rubber bearing is: pier → lower anchoring component → lower connecting steel plate → shear key, lower sealing plate → rubber, lead core, stiffened steel plate laminated structure → upper sealing plate, Shear key → upper connecting steel plate → upper pre-embedded steel plate → transmitted to the beam body through the upper anchoring component.

Features:

1. The vertical stiffness is stable and the bridge load bearing effect is good;

2. The horizontal stiffness is moderate, which can meet the needs of large displacement caused by earthquakes;

3. The lead core has good damping effect and good energy dissipation capacity;

4. Natural rubber is mainly used, and the temperature is applicable to a wide range;

5. The area of the lead core is adjustable, which is convenient for adjusting the damping ratio of the support;

6. Installation and maintenance are easy to replace, and the operation and maintenance costs are low.

Contact Us
  • Building isolation products
    Building lead rubber bearing type Ⅱ (LRB-Ⅱ) Building lead rubber bearing type Ⅰ ( LRB-Ⅰ )
    Features: Superior performance, longer life, upgraded version Features: Classic style, worth having
    Specification: LRB/LNR-Ⅱ type (diameter: 200~ 1500mm) Specification: LRB/LNR-Ⅰtype (diameter: 200~ 1500mm)


    Product Specifications and Parameters of Type II Building Seismic Isolation Rubber Bearings

    Table 1 Mechanical properties and specifications of lead rubber bearings (G=0.392MPa)

    Category

    unit

    LRB

    1500

    LRB 1400

    LRB

    1300

    LRB

    1200

    LRB

    1100

    LRB 1000

    LRB9

    00

    LRB

    800

    LRB

    700

    LRB

    600

    LRB

    500

    LRB

    400

    LRB

    300

    Effective diameter

    mm

    1500

    1400

    1300

    1200

    1100

    1000

    900

    800

    700

    600

    500

    400

    300

    First shape factor S1

    /

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    second shape factor S2

    /

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    vertical stiffness

    kN/mm

    8000

    7350

    6600

    5150

    4600

    4250

    3550

    2950

    2600

    2200

    1800

    1350

    650

    Equivalent Horizontal Stiffness (100%)

    kN/mni

    4.510

    4.212

    3.358

    3.356

    2.952

    2.798

    2.391

    2.109

    1.919

    1.626

    1.298

    1.051

    0.878

    Equivalent damping ratio (100%)

    %

    23

    23

    23

    23

    24

    24

    23

    23

    24

    24

    23

    23

    27

    Stiffness after yield

    kN/mm

    2.660

    2.262

    2.082

    1.962

    1.882

    1.688

    1.589

    1.396

    1.189

    1.165

    0.885

    0.686

    0.486

    yield force

    kN

    420

    420

    300

    250

    227

    203

    141

    106

    90

    63

    40

    27

    23

    Total thickness of rubber layer

    mm

    240

    240

    240

    220

    204

    186

    167

    149

    130

    112

    94

    75

    58

     

    Table 2 Mechanical properties and specifications of lead rubber bearings (G=0.490MPa)

    Category

    unit

    LRB

    1500

    LRB

    1400

    LRB

    1300

    LRB

    1200

    LRB

    1100

    LRB1

    000

    LRB9

    00

    LRB8

    00

    LRB7

    00

    LRB

    600

    LRB

    500

    LRB4

    00

    LRB3

    00

    Effective diameter

    mm

    1500

    1400

    1300

    1200

    1100

    1000

    900

    800

    700

    600

    500

    400

    300

    First shape factor SI

    /

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    Second shape factor S2

    /

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    Vertical stiffness

    kN/mm

    8100

    7500

    6700

    5250

    4700

    4350

    3650

    3050

    2700

    2300

    1900

    1500

    700

    Equivalent Horizontal Stiffness (100%)

    kN/mm

    5.159

    4.628

    3.805

    3.388

    3.299

    3.209

    2.866

    2.399

    2.266

    1.899

    1.511

    1.286

    0.988

    Equivalent damping ratio (100%)

    %

    23

    23

    23

    23

    24

    24

    23

    23

    24

    24

    23

    23

    27

    Stiffness after yield

    kN/mm

    3.366

    2.906

    2.501

    2.355

    2.212

    2.096

    1.899

    1.688

    1.505

    1.281

    1.051

    0.851

    0.600

    Yield force

    kN

    420

    420

    300

    250

    227

    203

    141

    106

    90

    63

    40

    27

    23

    Total thickness of rubber layer

    mm

    240

    240

    240

    220

    204

    186

    167

    149

    130

    112

    94

    75

    58


    Table 3 Mechanical properties and specifications of lead rubber bearings (G=0.343MPa)

    Category

    unit

    LRB

    1500

    LRB

    1400

    LRB

    1300

    LRB

    1200

    LRB

    1100

    LRB1

    000

    LRB9

    00

    LRB8

    00

    LRB7

    00

    LRB6

    00

    LRB

    500

    LRB4

    00

    LRB3

    00

    Effective diameter

    mm

    1500

    1400

    1300

    1200

    1100

    1000

    900

    800

    700

    600

    500

    400

    300

    First shape factor S1

    /

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    >15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    ≥15

    Second shape factor S2

    /

    ≥5

    ≥5

    ≥5

    >5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    ≥5

    Vertical stiffness

    kN/mm

    7900

    7250

    6500

    5050

    4500

    4150

    3450

    2850

    2500

    2100

    1700

    1300

    550

    Equivalent Horizontal Stiffness (100%)

    kN/mm

    4.189

    3.866

    3.156

    2.762

    2.702

    2.586

    2.212

    1.899

    1.769

    1.502

    1.193

    0.968

    0.815

    Equivalent damping ratio (100%)

    %

    23

    23

    23

    23

    24

    24

    23

    23

    24

    24

    23

    23

    27

    Stiffness after yield

    kN/mm

    2.386

    2.099

    1.801

    1.616

    1.598

    1.503

    1.388

    1.166

    1.022

    0.906

    0.775

    0.601

    0.428

    Yield force

    kN

    420

    420

    300

    250

    227

    203

    141

    106

    90

    63

    40

    27

    23

    Total thickness of rubber layer

    mm

    240

    240

    240

    220

    204

    186

    167

    149

    130

    112

    94

    75

    58

Founded in 2016

Zhejiang Earthquake Prevention Technology Co., Ltd. is a holding subsidiary established by Hangzhou Diping Zhenan Technology Co., Ltd. in September 2020. Zhejiang Zhenfang Technology Co., Ltd. has a registered capital of 26 million yuan, its own factory building covers an area of 10,800 square meters, and the standard factory building area is 6,000 square meters. With the great help of the Institute of Engineering Mechanics of China Earthquake Administration, the company has established a technical team led by domestic experts in seismic reduction and isolation technology, which has laid a solid foundation for long-term development in the future.
Zhejiang Earthquake Prevention Technology Co., Ltd is a member of China Disaster Prevention Association. Famous LRB( lead rubber bearing) :LRB-Ⅰ、LRB-Ⅱ manufacturers and suppliers in China, we provide LRB( lead rubber bearing) :LRB-Ⅰ、LRB-Ⅱ for better Seismic Isolation system.

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product ADVANTAGE

  • Friction damper

    It mainly includes the middle steel plate, the two outer steel plates and the friction material between the steel plates.

  • Simple mechanical model

    Simple and easy analysis and design of structural vibration reduction.

  • Simple structure and low cost

    Even large earthquakes are not damaged, so there is no need to replace.

  • Damping

    The hysteresis curve is basically rectangular.

  • Stable performance

    Velocity correlation, displacement correlation is small.

  • Good durability

    No post-maintenance required.

  • Energy absorption

    Vertical bearing capacity, horizontal restoring force, damping (energy absorption) trinity.

  • Damping ratio

    Improved rubber formula, the equivalent damping ratio can reach more than 12%.

  • Maintenance costs

    Low maintenance and management costs (no additional damping devices required).

  • Environmental friendly

    HDR high damping rubber has low temperature dependence and is widely used in different climatic regions.

  • Creep properties

    HDR high damping rubber has the same superior deformation performance as natural rubber.

  • Aging resistance

    The surface of the high damping bearing is covered with a rubber protective layer to protect the internal rubber from ozone and ultraviolet rays.

  • Viscous resistance

    It is a kind of damper related to stiffness and speed.

  • Widely used

    It is used in high-rise buildings, bridges, seismic reconstruction of building structures and other fields.

  • Airbag

    The damper absorbs and dissipates the impact energy of the earthquake on the building structure to the maximum extent.

  • Silicone oil medium

    The medium has a small viscosity temperature coefficient, and good radiation resistance.

  • Electrical insulation properties

  • Ozone resistance, corona resistance