FRAGILITY AND RELIABILITY ANALYSES OF SOIL - PILE - BRIDGE PIER INTERACTION

Mladen Ćosić, Radomir Folić, Boris Folić

DOI Number
10.2298/FUACE170420008C
First page
093
Last page
111

Abstract


The purpose of this paper is to present the methodology for performance-based seismic evaluation of soil-pile-bridge pier interaction using the incremental nonlinear dynamic analysis (INDA). The system's input signal was treated through the generated artificial accelerograms which were subsequently processed by soil layers and for the bedrock. The INDA analysis was post processed separately for the pier and for the pile, so that the constructed PGA=f(DR) curves are in the capacitive domain. For these curves the authors identified the performance levels, while the regression analyses were conducted based on the specific DR and PGA parameters. Fragility curves were constructed based on the solutions of regression analysis and the probability theory of log-normal distribution. Based on the results of fragility analysis, reliability curves were also constructed. The methodological procedure for seismic performance analysis presented in this study provides an integrated quantitative-qualitative consideration and evaluation of the complex soil-foundation-structure interaction (SFSI).


Keywords

incremental nonlinear dynamic analysis, pile performance, fragility, reliability, artificial accelerograms

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