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September 08, 2026 - BY Admin

Earthquake Base Isolation Systems: Elastomeric Bearings vs Friction Pendulum Sliders

Decoupling Superstructures from Ground Motion Tremors

Rather than designing rigid building frames that absorb massive seismic shocks through structural deformation, base isolation decouples the building from the shaking ground beneath it.

Comparing Base Isolation Technologies

Structural teams select base isolation bearings based on building weight and expected ground fault displacements.

  • Lead-Rubber Bearings (LRB): Alternating layers of steel plates and rubber around a solid lead core that absorbs seismic energy.
  • Friction Pendulum Sliders: Heavy articulated sliders moving across curved concave stainless steel dishes, extending natural periods.
  • Isolator Moat Clearances: Designing flexible utility loops and perimeter moat gaps to accommodate up to 600mm of lateral sway.

Learn dynamic lateral analysis in the ETABS Structural Design Course at CADDEX.

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