Simplified Reliability Analysis of Transmission Structures Including Both Geometric and Material Nonlinearities

by H. J. Dagher, Univ of Maine, Orono, United States,
Qichi Lu, Univ of Maine, Orono, United States,
A. H. Peyrot, Univ of Maine, Orono, United States,

Abstract: Generally, in nonlinear structural systems, the g-functions of the components cannot be explicitly expressed in terms of the basic random variables. In using the design point method to conduct the component reliability analysis, repetitive time-consuming nonlinear structural analyses must be conducted. This paper describes an approximate method to conduct the component and system reliability analysis of transmission structures taking into account the nonlinear structure properties. it is also shown that when the material strengths are highly correlated, g-functions which include interaction of axial load and bending moments may be simplified to g-functions with no interaction. The system reliabilities of two actual transmission structures are calculated using this method.

Subject Headings: Structural reliability | System reliability | Nonlinear analysis | System analysis | Structural systems | Material properties | Construction materials

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