noun
base isolation structure; seismic isolation system
Engineering term for a building design that uses isolators to decouple the structure from ground motion during earthquakes.
このビルは免震構造を採用しているので、地震の揺れが少ない。
This building uses a base isolation structure, so it shakes less during earthquakes.
免震構造は、建物と基礎の間に積層ゴムなどを設置する技術だ。
Base isolation is a technique that places laminated rubber bearings between the building and its foundation.
Compound of 免 (めん, 'avoid' or 'escape') + 震 (しん, 'earthquake') + 構造 (こうぞう, 'structure'). A modern technical term.