| 摘要 |
PROBLEM TO BE SOLVED: To provide a falling-stone protective structure and its designing method having a strength required for a protection on the basis of an ultimate displacement. SOLUTION: Energy on an elastic response, which is received when assuming that a part of the falling-stone protective structure gives the elastic response against a specified maximum falling-stone shock Po, is calculated. Through an elasto-plastic response owing to an elastic deformation up to an yield point C and a plastic deformation after the yield point C of the falling-stone protective structure, a protective function is secured without requiring an excessive strength for the reason that a displacementδn of the falling-stone protective structure when the energy at the time of the elastic response is smaller than the ultimate displacementδu. COPYRIGHT: (C)2005,JPO&NCIPI
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