A UNIFIED RDA FOR THE SEISMIC RELIABILITY ESTIMATION OF DEPENDENT FAILURE LIFELINE ENGINEERING SYSTEMS

Based on the recursive decomposition algorithm (RDA) of network connectivity reliability analysis, a unified RDA is developed by integrating the three parts of the original RDA for different network weighting forms. To estimate the seismic reliability of dependent failure lifeline engineering systems, the sequential compounding method (SCM) and Gumbel Copula function are used to calculate the joint failure probability of a disjoint minimum path and a disjoint minimum cut event in RDA, respectively. The unified RDA for the seismic reliability estimation of dependent failure lifeline engineering systems is developed. The calculation results of the reliability of a 36-node grid network show that the method can be used for dynamic seismic reliability estimation of dependent failure network systems with high accuracy.