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Anti-Seismic Reinforcement on Existing Bridges

Improved anti-seismic safety with the application of seismic isolation devices, such as LRB or BM-S, and dampers for replacing the bearings for existing fixed or moving support structure bridges.

Various Types of Anti-Seismic Reinforcement on Existing Bridges

  • Can satisfy the requirements for stable performance of bearings with supporting loads allowing elongation and rotational absorption of bridge girders over a long period of time.
  • Customizable dispersion ratio of horizontal force during an earthquake will allow the bridge design to be more reasonable.
  • Maintenance is easier compared with steel bearings.
  • Simpler structure provides with ease of replacement work.
  • LRB performance can be flexibly designed according to the size and the characteristics of the structure by adjusting the size of the lead plug.
  • Can satisfy the requirements for stable performance of bearings with supporting loads, allowing elongation and rotational absorption of bridge girders over a long period of time.
  • Customizable dispersion ratio of horizontal force during an earthquake will allow the bridge design to be more reasonable.
  • Maintenance is easier as compared with steel bearings.
  • Simpler structure provides with ease of replacement work.
  • High energy absorption function reduces seismic force and displacement induced by an earthquake.
  • Compact size and rich lineup will allow the flexible arrangement of dampers of the required number and performance.
  • Provides an economical solution for anti-seismic reinforcement with less ancillary works.
  • No adjustment of horizontal displacement required at installation of post-slide etc.
  • Reduced influence of statically indeterminate force generated by temperature variation etc. on the resistance to the earthquake.
  • Reduced inertial force during an earthquake owing to the elongated period of bridge vibration.
  • The application of low friction sliding bearing for the bridge pier will allow the slimmer pier columns and foundation piles.
  • The application of seismic isolation bearing and vibration control damper will realize an excellent damping performance.
  • Shows the excellent earthquake resisting performance with displacement restriction and falling prevention of bridge beams.
  • Used mainly for road bridges.

The Mechanism of Load Dispersion Bridge

Introduction of mechanism of anti-seismic reinforcement

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