LRB( lead rubber bearing) ：LRB-Ⅰ、LRB-Ⅱ for Seismic Isolation

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.

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

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)

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

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

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

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

Founded in 2016

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