Rubber bearing for stair interval earthquake collapse

A stair shock-absorbing and anti-collapse bearing (hereinafter referred to as LTZZ) is set between the lower end of the stair riser and the ladder beam to release the "shear bracing" effect of the riser under earthquake action and weaken the impact of stair components on the seismic performance of the main structure. At the same time, LTZZ, as the second line of defense, ensures that the stair structure has sufficient redundancy end and (continuous) collapse resistance, so that the function of the stairwell as the main escape channel is not interrupted in the event of a major earthquake, and plays the role of a "safety island".

Compared with the 11G101-2 sliding bearing, the stair isolation and anti-collapse rubber bearing has four advantages:
1. Safer — the stairs will not fall off during a major earthquake, and the stairwell will not produce brittle continuous collapse damage during a major earthquake or super earthquake!
2. More beautiful — a "deformation zone" is reserved inside the shock-absorbing support, and the building surface at the connection between the lower end of the stairs and the rest platform can be continuously set as usual.
3. Smaller seismic force — the shock-absorbing support increases the damping ratio of the stairwell, effectively reducing the seismic effect of the stair components.
4. The construction is more convenient — during construction, the isolation bearing is placed between the ladder beam and the ladder plate binding steel bars. After positioning, the whole can be cast in place.

Applications:
It is suitable for reinforced concrete frame structure, frame part of frame-shear wall (core tube) structure and steel frame (support) structure in seismic fortification intensity 6-9 seismic zone.
Contact Us

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 Rubber bearing for stair interval earthquake collapse manufacturers and suppliers in China, we provide Rubber bearing for stair interval earthquake collapse 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