By M H Faber; Jochen Köhler; Kazuyoshi Nishijima

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Extra resources for Applications of statistics and probability in civil engineering

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2011) provides evidence that small variation of the natural circular frequency of the structure may induce large fluctuation in structural responses. 2 (2) Response analysis of a 2-span 9-story shear frame structure subjected to deterministic ground motion was exemplified. In this example, the Q-SPM was adopted to select the representative points in random-variate space. Totally 20 independent random parameters are involved in the investigation. 2. Pictured in Figure 1 is the PDF evolution surface.

They need a systematic approach to be able to objectively evaluate the proportionality of safety measures in situations of insufficient structural safety. The proportionality of safety interventions on existing structures comprises a comparison between (safety) cost and benefit of interventions in terms of risk reduction. This paper presents a methodology to evaluate proportionality of safety measures, discusses assumed values and numbers that are used to estimate risk reduction and corresponding safety costs.

Increasing levels of damage are simulated by incrementally impacting a composite plate with a steel ball. In diagnosing the health state of the plate, a damage index was used to quantitatively classify the differences between the originally actuated signal and the final signal due to the modified time reversal process. Magnitude of the damage index was used as basis for damage severity evaluation. CONCLUSIONS This paper has presented a time reversal method to detect the presence of damage within a thin composite plate.

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