Stone and concrete are strong in compression but weak in tension. Therefore, structures that take advantage of this characteristic are support structures. In contrast, cables are weak in compression but strong in tension. A cable structure makes good use of this property and is also called a suspension structure, or a vine structure. Suspension bridges are a typical example of cable structures, and suspension bridges made from natural materials such as ivy have been in use since ancient times. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
石やコンクリートは圧縮に強く引張りに弱い。そのため,この特徴を生かしてつくった構造は支える構造となる。これに対して,ケーブルは圧縮に弱く引張りに強い。この性質をじょうずに利用した構造がケーブル構造で,サスペンション構造suspension structure,あるいは懸垂構造とも呼ばれ,いわゆるつる構造となる。つり橋はケーブル構造の典型例で,ツタなどの自然材料を用いたつり橋はかなり古くから用いられていた。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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