Stochastic Finite Element-Based Reliability Analysis of Dynamically Loaded Frames

by Sankaran Mahadevan, Vanderbilt Univ, Nashville, United States,
Sandeep Mehta, Vanderbilt Univ, Nashville, United States,

Document Type: Proceeding Paper

Part of: Mechanics Computing in 1990's and Beyond


This paper presents the use of the Stochastic Finite Element Method (SFEM) for reliability analysis of steel frames subjected to dynamic loading, in the context of modal superposition. This is achieved by computing the sensitivity of the dynamic response to the basic random variables, by applying the chain rule of differentiation to the deterministic analysis. Computational efficiency is ensured by the use of reliability sensitivity indices to discard random variables with insignificant influence on the reliability. A numerical example is presented to illustrate the procedure.

Subject Headings: Stochastic processes | Dynamic loads | Dynamic structural analysis | Finite element method | Dynamic analysis | Load factors | Frames | Steel frames

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