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力学学报  2005 

Failure theory and reliability analysis of structural system considering static strength and fatigue
杆系结构静强度和疲劳失效机理及可靠性分析

Keywords: dead failure,fatigue failure,strength deterioration,failure theory of structural system,relativity,system reliability
静载失效
,疲劳失效,强度衰减,系统失效机理,相关性,系统可靠性

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Abstract:

The elements of structural system subjected to dead and fatigue load will be dead or fatigue load failure by any possibility. Based on the understanding of passive impact of accumulated damage induced by fatigue load on ultimate bearing capacity, the ultimate bearing capacity reliability analysis method for structures subjected to fatigue load was presented. The paper analyzed dead or fatigue load failure of every element of structural system and considered the relativity of two failure modes influencing on the element reliability. The paper discussed the failure theory of structural system subjected to dead and fatigue load and gave the method of reliability analysis considering static strength and fatigue. A numerical example is analyzed. It is indicated that the influence on the structural system by dead and fatigue load is different at the different using state, the failure forms of elements in the significant failure paths have dead and fatigue load failure. It is suitable for engineering case.

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