In this paper, an overview is given on several key issues and related research progress made in lifeline engineering. The research topics include: numerical modeling of random seismic waves, probabilistic density evolution analysis for nonlinear structural responses, and seismic reliability analysis of large-scale lifeline networks. In addition, a comparison is made between the domestic and international studies on the aforementioned topics. Several examples are included in the paper as the case studies. Recommendations are given for further development of the lifeline engineering research.
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