弾塑性解析にもとづく鋼骨組構造の最小重量設計
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概要
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Hitherto, there are many studies on optimum elastic design of framed structures. The studies on limit design considering collapse of the frames based on full plastic moment have been reported. But the elstic-plastic design allowing maximum plastic strain has not been published. On the other hand, the sizes of frame members of ships have been determined by limiting the maximum stress and those are obtained on the basis of the theory of elasticity, so as not to exceed the value of a certain allowable stress less than yield stress. However, to estimate the strength of the ship structure subjected to the extreme loads that ships may rarely encounter, the design criterion should not necessarily be based on the consideration mentioned above, and it is more reasonable to determine the optimum sizes of structures taking into account of keeping the maximum plastic strain within the specified limits, if the plastic deformation is sufficiently small to make caused collapse or initate cracks. In this paper, assuming allowable maximum plastic strain for the framed structural members as constraint conditions and using elastic-plastic strength analysis by means of complementary energy, presented by the author et. al., a method of determining the optimum sizes of the structure of which total weight of framed structure is minimized, is presented a general theoretical procedure and several examples of the applications are shown.
- 社団法人日本船舶海洋工学会の論文
- 1983-08-24
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