|Table of Contents|

Definition and Application of Safety Factor for Multiaxial Strength(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2008年01期
Page:
38-42
Research Field:
Publishing date:
2008-03-20

Info

Title:
Definition and Application of Safety Factor for Multiaxial Strength
Author(s):
QIAN Xiang-dong;  JIANG Hong-dao
Definition and Application of Safety Factor for Multiaxial Strength
Keywords:
multi-parameter strength criterion;  multiaxial stress state;  failure distance;  safety factor;  triaxial test
PACS:
TU311.2
DOI:
-
Abstract:
The conventional safety factor based on classical strength theory could not exactly express the safety for materials in multiaxial stress states, and it was difficult to apply the general multi-parameter strength criteria directly. The definition and calculation method of the safety factors for multiaxial strength were proposed by using the concept of failure distance, which was applicable in any stress state and multi-parameter strength criteria. Taking concrete materials as an example, 5 common strength criteria were selected, and the calculation formulae of the safety factors for these criteria were discussed, and thesafety factors of concrete in 3 types of stress state were computed for each criterion. The numerical examples for concrete show that the states of strength described by thesafety factor proposed agree with the results of triaxial test. The results indicate that the safety factor for multiaxial strength has advantage of changing present design criterion which is used to apply the safety factor for uniaxial strength, so as to provide more reasonable and scientific tools for strength design of structures.

References:

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Memo

Memo:
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Last Update: 2008-03-20