Abstract: Eearthquake damage and loss assessment of lifeline engineering have an extremely important significance on earthquake damage defense and earthquake emergency responses. Lifeline engineering is a complex and vast network system, and until now, the existing research on earthquake damage and loss assessment of lifeline engineering shows some limitations and uncertainties. We utilized the earthquake damages and loss assessment of extensively and systematically researched buildings, and analyzed earthquake damages to buildings and lifelines in previous typical earthquakes. By integrating losses of buildings and lifelines, we established the correlation model by analyzing the quantitative relation between losses of buildings and lifeline engineering. Moreover, by analyzing kilometer grid data including population, GDP and land utilization, we defined sub-area classification principle in mainland China, and then, built the model for analyzing direct economic loss of lifeline engineering base on the principle. Furthermore, we developed the analysis module for direct economic loss of lifeline engineering based on GIS software platform, and took advantage of the module to display the spatial distribution of direct economic loss of lifeline engineering under different seismic intensities in Sichuan Province, China.

Key words: Earthquake Direct economic loss, Lifeline engineering, Building, Sub-area classification