BRB(buckling restrained brace)

The anti-buckling bracing is a kind of energy dissipation element, which is a new type of hysteretic energy dissipation bracing. The biggest difference between buckling braces and ordinary braces is that ordinary braces have the problem of buckling under compression, while buckling braces will not buckle under tension or compression. This is because the main energy-consuming component of the buckling brace, that is, the restriction element (usually a steel casing) around the core unit, makes the core unit not buckling before the full section yields under the action of axial pressure, thus effectively It avoids the problem of easy buckling of ordinary supports under compression. The hysteretic performance of the core element can dissipate most of the seismic energy and reduce the damage to the main structure caused by the seismic action.

The buckling restraint support is generally composed of three parts, namely the core unit, the restraint unit and the sliding mechanism unit. become. Common cross-sectional forms are cross-shaped, T-shaped, double-T-shaped and in-line, etc., which are suitable for different stiffness requirements and energy consumption requirements. The restraint element, also known as the lateral support element, is responsible for providing a restraint mechanism to prevent the overall or residual buckling of the core element under axial compression. The more common form of restraint is steel-filled concrete or pure steel structure restraint. The sliding mechanism element, also known as the delamination element, provides a sliding interface between the core element and the constraint element, so that the support has similar mechanical properties as possible under tension and compression, and avoids the expansion of the core element due to compression. The friction force between the units causes a large increase in the axial pressure. This sliding unit is generally made of some non-bonded materials.
The buckling restraint support only connects the core plate with other components, and the load is all borne by the core plate. The outer sleeve and filling material only constrain the core plate to buckling under compression, so that the core plate cannot enter into yield under tension and compression. Therefore, the hysteretic performance of the buckling restrained bracing is excellent. On the one hand, buckling restraint bracing can avoid the obvious difference in tensile and compressive bearing capacity of ordinary bracing, on the other hand, it has the energy dissipation capacity of metal damper, which can act as a "fuse" in the structure, so that the main structure is basically within the elastic range. Therefore, the application of buckling restraint bracing can comprehensively improve the seismic performance of traditional bracing frames under moderate and large earthquakes.
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  • Advantages: separation of bearing capacity and stiffness, high bearing capacity, good ductility and hysteresis performance, protection of the main structure, and reduction of the stress on adjacent components.


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 BRB(buckling restrained brace) manufacturers and suppliers in China, we provide BRB(buckling restrained brace) for better Shock Absorption 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