Frame structure - framed structure

Japanese: 骨組構造 - ほねぐみこうぞう（英語表記）framed structure

A structure made by assembling long, thin, rod-like members. Straight members are usually used as the members. The joints between members are called nodes. In real structures, it is not always possible to clearly distinguish between members and nodes, but even in such cases, members are idealized as straight lines with no thickness, and nodes, where they intersect, are recognized as points with no size. A frame structure made of basic units of members arranged in a triangle is generally called a truss. Since the shape of a triangle does not change unless the length of each side is changed, it is also possible to allow members to rotate relative to each other at the nodes (such nodes are called pin nodes).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

細長い棒状の部材を組み立てて作られた構造物。部材としてはふつう直線状の部材を用いる。部材と部材の接合点を節点という。現実の構造物では，部材と節点とは必ずしも明りょうには区別できないが，その場合にも，部材は太さのない直線に理想化し，その交点である節点は大きさのない点として認識する。　三角形に組んだ部材を基本単位として作られる骨組構造を一般にトラスtrussという。三角形はその各辺が長さを変えない限り形が変わらないので，節点で部材が互いに回転できるようにしてもよい(このような節点をピン節点という)。

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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