Utility of Reliability Index for Structural Design

by Takashi Chou, Shinshu Univ, Japan,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


Relations between design results, such as configurations, and the reliability indices, in accordance with the Advanced First Order Second Moment (AFOSM) method, are numerically investigated with the help of some fundamental problems and practical examples. In general, the AFSOM method contains some intrinsic errors. When the index value is large, the error in the failure probability increases significantly, even if the error in the index is small. It is explained that the design result is not affected to the same degree as the error in the failure probability by the error in the index, but it is usually affected to the same or somewhat larger degree as the error of the index.

Subject Headings: Structural reliability | High-rise buildings | Failure analysis | Numerical analysis | Professional societies | Structural analysis | Structural failures | Probability

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