First-Passage Failure Predictions for Yielding Primary-Secondary Systems

by David C. K. Chen, Intec Engineering Inc, Houston, United States,
Loren D. Lutes, Intec Engineering Inc, Houston, United States,



Document Type: Proceeding Paper

Part of: Engineering Mechanics

Abstract: Approximate methods are used to investigate the effect of nonnormality (non-Gaussianity) on the time of first-passage failure for a linear secondary system mounted on a yielding primary structure. The excitation is a normally distributed stochastic ground motion. The coefficient of excess (COE) is used to characterize the degree of nonnormality of the random response. An approximate procedure is presented for predicting the COE of the secondary response, and the use of this information in obtaining an improved estimate of the expected failure is illustrated.

Subject Headings: Failure analysis | Structural failures | Effluents | Ground motion | Gaussian process | Linear functions | Excitation (physics)

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