Building Vibration Isolation Rubber Bearings

Seismic isolation bearing refers to the supporting device set by the structure to meet the seismic isolation requirements. It is to add a seismic isolation layer between the upper structure and the foundation, and install the rubber isolation bearing to provide a soft connection with the ground. Through such technology , which can cancel about 80% of the energy of the earthquake. For example, laminated rubber bearings (or vibration isolation rubber bearings, sandwich rubber pads, etc.). It is a structural member with small horizontal rigidity and large vertical rigidity, which can withstand large horizontal deformation and can be used as a part of the load-bearing system.

The building seismic isolation rubber bearing is composed of multiple layers of rubber and multi-layer steel plates or other materials alternately overlapped. According to the requirements of different buildings, the seismic isolation rubber bearings can have different laminated structures, manufacturing processes and formula designs to meet the requirements of different buildings. The required vertical stiffness, lateral deformation, damping, durability and other performance requirements, and guaranteed to have a service life of not less than 70 years.
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  • Product features and advantages:
    ◼ Customization: Recommend the most suitable product customization according to the specific needs of customers.
    ◼ Matching: According to each project there is an independent structural design, product design, adhesive formula and technical service program conforming to the standard:
    The products meet the highest requirements of national, industry and local standards. Reach international advanced level


    Construction lead-core rubber bearing Ⅱ type (LRB-Ⅱ) 
    Building natural rubber bearing Ⅱ type (LNR-Ⅱ)
    Features: Superior performance, longer life, upgraded version
    Specification: LRB/LNR-Ⅱ type (diameter: 200~ 1500mm)
    Construction lead-core rubber bearing Ⅰ type (LRB-Ⅰ) 
    Building natural rubber bearing Ⅰ type (LNR-Ⅰ)
    Features: Superior performance, longer life, upgraded version
    Specification: LRB/LNR-Ⅱ type (diameter: 200~ 1500mm)

    Installation Process:
    1、Before the construction of the lower pier of the seismic isolation bearing, measure the position of the vertical projection of the center of the seismic isolation bearing, and pre-mark the position of the vertical projection of the four pre-buried members of the seismic isolation bearing on the concrete surface of the base plate using the steel formwork for the installation of the seismic isolation bearing, so as to avoid the pre-buried members being blocked by the main reinforcement of the lower pier.
     Pre-embedded parts: the members pre-buried in the upper and lower piers of the seismic isolation bearing, so that the seismic isolation bearing is interconnected with the foundation and the superstructure, consisting of sleeve and reinforcement. The reinforcement is screwed into the sleeve.

    2、The lower support pier reinforcement cage is tied, use the pre-buried positioning steel template to fix the 8 pre-buried parts, fix the bolts, and clamp the template for installation, and then placed on the reinforcement cage, measure the elevation of the template, plane position and flatness, and fix the pre-buried parts after alignment.

    3、Align the positioning hoops spot-welded at the bottom of the pre-buried parts. The upper part of the pre-buried parts use short reinforcement to do proper fixation with the lower support pier reinforcement cage to ensure that the positioning accuracy is within the specified range.

    4、Before pouring concrete on the lower pier, the positioning retest must be carried out, and the retest includes the elevation and center position of the pre-installed parts. After the concrete is poured, before the concrete sets, the steel formwork is removed for leveling, and then the seismic isolation bearing pre-buried parts are positioned and retested and recorded, and the retesting includes the pre-buried parts elevation, center position and flatness. In order to avoid mortar, concrete and other debris into the sleeve hole, the bolt should be screwed into the sleeve.

    5、After the concrete strength reaches 80% of the strength, the seismic isolation bearing can be installed, and the positioning retest must be conducted and recorded before installation, including the elevation, center position and flatness of the pre-buried parts. The installation of seismic isolation bearing can be carried out after the remeasurement meets the requirements. The installation should be cleaned up under the pier surface.

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 Building Vibration Isolation Rubber Bearings manufacturers and suppliers in China, we provide Building Vibration Isolation Rubber Bearings for better Seismic Isolation system.

HOT PRODCUTS

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

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

  • LNR(linear rubber bearing):LNR-Ⅰ、LNR-Ⅱ

    LNR(linear rubber bearing):LNR-Ⅰ、LNR-Ⅱ

  • Building Vibration Isolation Rubber Bearings

    Building Vibration Isolation Rubber Bearings

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    Elastic Sliding Bearing (ESB)

  • HDR ( high damping rubber)

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    Friction pendulum isolation bearing

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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