Overview
Principles of Construction
Lead rubber bearings are seismic isolation components designed specifically for bridge engineering, combining the flexibility of rubber and the seismic absorption performance of lead.
It is mainly composed of lead core and outer rubber. The presence of lead core provides better damping performance for the entire support, which can effectively absorb and disperse the impact caused by external forces such as earthquakes. Outsourced rubber provides good elasticity and wear resistance, ensuring the stability and durability of the support. When subjected to external loads, the rubber part will undergo certain deformation, while the lead core absorbs seismic energy through its own plastic deformation and viscous damping.
Lead rubber bearings have been widely used in bridge engineering due to their excellent mechanical properties, relatively simple structure, and high cost-effectiveness. It can withstand large horizontal deformations and reduce about 80% of the earthquake intensity, which is of great significance for emergency rescue, command, and stabilizing public opinion during major earthquakes. In addition, lead rubber bearings also have the advantages of easy installation and low maintenance costs.
Product advantages
The main advantages of lead rubber bearings in bridge engineering include good seismic isolation performance, strong durability, easy installation, and the ability to withstand large horizontal deformations.
1. Good seismic isolation performance: Lead core rubber bearings combine the elasticity of rubber and the plastic deformation ability of lead core, which can effectively absorb and consume seismic energy during earthquakes, significantly reduce the vibration level of bridges, and protect bridge structures from damage.
2. Strong durability: Lead rubber bearings are made of high-quality rubber materials, which have strong durability and can withstand long-term use and the influence of natural environment. They are not easy to age, crack or deform, and their lifespan can reach 60-80 years.
3. Easy installation: The design of lead rubber bearings makes the installation process relatively simple, which helps reduce construction difficulty and time costs.
4. Capable of withstanding large horizontal deformations: Lead rubber bearings have sufficient horizontal stiffness and can withstand large horizontal deformations, ensuring that instability does not occur under strong earthquake action. This is of great significance for emergency rescue, command, and stabilizing public opinion during a major earthquake.
Specification
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Product Name
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Lead rubber bearing(LRB) |
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The working principle of lead rubber bearings is mainly to absorb and consume seismic energy through the elastic deformation of the rubber layer and the plastic deformation of the lead core, thereby protecting the bridge structure.
In bridge engineering, lead rubber bearings are composed of rubber layers, steel plates, and lead cores. Among them, the rubber layer has good elasticity and can absorb and disperse the energy generated by external forces such as earthquakes; Steel plates play a role in enhancing the overall structural strength and stability. As the core part of the support, the lead core has high plasticity and ductility, and can deform under stress without easily breaking.
When a bridge is subjected to external forces such as earthquakes, the rubber layer first undergoes elastic deformation, converting seismic energy into its own deformation energy, thereby reducing the seismic force transmitted to the upper structure. At the same time, the lead core will also undergo plastic deformation during the stress process, further consuming seismic energy and reducing the impact on the structure. After the earthquake, the lead core undergoes dynamic recovery and recrystallization processes, as well as the shear tension of rubber, to automatically restore the bridge to its original position. |
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Product Structure
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Lead rubber bearings are mainly composed of upper and lower sealing plates, lead cores, multiple layers of natural rubber, and stainless steel plates that are vulcanized together. They are designed specifically for structures such as bridges and are used for shock absorption and isolation.
In bridge engineering, the structural characteristics of lead rubber bearings enable them to play an important role. Among them, multi-layer natural rubber provides good elasticity and wear resistance, which can withstand the weight and horizontal displacement transmitted from the upper structure of the bridge. Stainless steel plates enhance the strength and stability of the overall structure. The addition of lead core significantly improves the damping performance of the support, which can absorb and consume energy through plastic deformation under external forces such as earthquakes, thereby reducing the vibration amplitude and damage degree of the bridge structure. |
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Applications
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Lead rubber bearings are mainly used in bridge engineering for shock absorption and isolation, protecting bridge structures from natural disasters such as earthquakes and external disturbances such as traffic noise.
Lead rubber bearings are commonly used for supporting bridge piers in bridge engineering. It can effectively reduce the stress on the bridge piers and extend the service life of the bridge. Lead rubber bearings play an important role in bridge seismic isolation and resistance due to their excellent mechanical properties, relatively simple structure, and high cost-effectiveness. It can reduce about 80% of the earthquake intensity, which is of great significance for emergency rescue, command, and stabilizing public opinion during major earthquakes. |
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Product parameter adjustment
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Production can be carried out according to the drawings, or customized processing can be carried out according to customer needs |
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Program Design
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We can provide bridge bearing design solutions |
Company Profile
Hengshui Siwo New Material Technology Development Co., Ltd. is a professional manufacturer of seismic isolation and reduction, integrating research and development, production, and sales. It mainly involves the fields of construction and bridges, covering building steel structure bearings, bridge bearings, expansion devices, seismic ball steel bearings, seismic isolation rubber bearings, basin type bearings, yield type dampers, displacement type dampers, TMD tuned mass dampers, buckling restrained supports, etc.
The company currently has 78 fixed employees, including 18 technical personnel and 12 personnel with senior and intermediate professional titles. The company has established long-term cooperative relationships with universities such as Tsinghua University, Tongji University, Harbin Institute of Technology, Hunan University, Chongqing University, as well as design institutes such as Beijing Institute of Architecture, East China Institute, China Construction Southwest Institute, and China Aviation Institute. It is committed to scientific and technological innovation, product innovation, and keeping up with the pace of university industry research cooperation. At the same time, it is committed to structural design, engineering calculations, finite element analysis, and product trial testing cooperation, and is committed to new product research and development, making products more refined, optimized, and strong.
The company covers an area of over 270 acres (180000 square meters), including workshops for mechanical processing, rubber products, product assembly, and other processes. There are more than 50 sets of production equipment, including CNC lathes, CNC milling machines, CNC drilling machines, CNC cutting equipment, vulcanizing machines, internal mixers, and open mixers, to meet the processing needs of various products.
The company's testing center has excellent equipment and complete testing facilities. Equipped with trained and qualified professional quality inspectors, the products are inspected throughout the entire process to ensure that unqualified raw materials do not enter the factory, unqualified semi-finished products do not transfer to another process, and unqualified products do not leave the factory.
Driven by research and development, we strive to refine, optimize, and strengthen our products. Our consistent policy is to provide high-quality products and services that bring economic benefits to our enterprises while creating greater social benefits.
Why Choose Us
Advanced production equipment
Adequate inventory
praise from customers
FAQ
Q1: Are you trading company or manufacturer?
A:We are manufacturer.
Q2: What's your MOQ?
A:Normally it's 500 meters for one size and one color.
Q3: What's your output?
A:500,000 meters per week
Q4: How long is your delivery time?
A:Generally it is 5-10 days if the goods are in stock. And for mass production it takes 15-20 days.
Q5: May I have samples ? is it free or extra?
A:Yes, we are happy to explore new product with our customers. If the sample need to be customized, please contact us. For the regular item, we supply 3-5meters samples for free. And customer pay the sample freight only.
Q6: Whether to support customized services?
A:We can customize according to drawings or samples,Production mold independent research and development manufacturing, independent transformation of production equipment.
Q7: What is your terms of delivery?
A:EXW.FOB.CFR.CIF,DDU.etc.
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