Quick analysis method for bridge seismic risk based on AHP

To better evaluate the bridge seismic risk, the paper provides an analysis method for bridge seismic risk based on AHP. A bridge seismic risk analysis model is set up based on AHP and bridge structure is analyzed quantitatively. Considering primary factors leading to bridge structure damage under the force of earthquake, we use the relative value contributing to bridge damage, set up a hierarchy comparison matrix, transform the experience of bridge damage influence factors described by seismic engineering experts into quantitative weight coefficient with AHP and calculate weight coefficient of bridge damage caused by the factors with a matrix of pairwise comparisons , thus providing quantitative basis for bridge structure anti-earthquake research. The initial result of analysis is basically consistent with real seismic damage after analyzing and calculating with real bridge seismic data. Compared with traditional methods, AHP can quantitative analysis with the qualitative factors on bridge earthquake damage and the evaluation is more scientific.