Computation of critical initial imperfection of truss structures

Kiyohiro Ikeda, Kazuo Murota

研究成果: Article査読

19 被引用数 (Scopus)

抄録

A method for computing the critical (worst) initial imperfection of elastic truss structures is presented, on the basis of a previous work of the writers. This method can deal with initial imperfections of various properties, including loading pattern vectors, nodal initial position vectors, initial member length, and the product of Young's modulus and cross-sectional area. Imperfection sensitivity matrices, which express the effects of initial imperfections, are computed compatibly with the method of finite element analysis of truss structures. Critical initial imperfections of a reticulated elastic truss dome structure are investigated in detail as a numerical example. The effects of various kinds of initial imperfections are compared quantitatively. It is shown that the load-bearing capacity computed for the critical initial imperfection gives the lower bound on the capacity for the imperfections chosen at random. The present method is less costly and more accurate than the method of random imperfections.

本文言語English
ページ(範囲)2101-2117
ページ数17
ジャーナルJournal of Engineering Mechanics
116
10
DOI
出版ステータスPublished - 1990 10
外部発表はい

ASJC Scopus subject areas

  • 材料力学
  • 機械工学

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