的意思
sara bareillesNavier's Straitjacket
期刊名称： Architectural Science Review
thw是什么意思作者： Heyman, Jacquesanger>knowledgeable
年份： 1999年
david cutler
期号： 第2期
porpoi
小学三年级英语试卷关键词： Structural Design;Engineering History;Gallileo;Navier
练口语
摘要：The theory of structural design was crystallized in 1826, the year of publication of Navier's Leons. Navier showed how the internal forces in an elastic hyperstatic structure could be calculated, the most critical ction identified, and ctions assigned so that the corresponding stress did not exceed a proportion of their limiting values. It was only over 100 years later that tests on full-scale structures showed that "actual" stress were very different from tho predicted by elastic theory, and this has led directly to plastic methods of design. Paradoxically, tho methods lead to the conclusion t
hat the "actual" working state of a structure is esntially unknowable, since it depends crucially on very small imperfections of manufacture and construction. While the imperfections can have no effect on ductile collap
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