A Study on the Damage Probability of Roadbed and Pavement Structure at Airport Caused by Liquefaction

Abstract

We propose a probabilistic model for evaluating the damage probability of a structure caused by liquefaction using the maximum acceleration of the ground surface as an index. This model is applied to the fragility curve, which evaluates the probability of function loss of roadbed and pavement structures that are directly affected by ground deformation. Parameters such as uncertainty are assumed from past studies on liquefaction and ground amplification. We evaluate the function loss probabilities due to liquefaction of roadbed and pavement structures such as runways and taxiways at Haneda Airport due to Level 1 and Level 2 earthquakes. In addition, the function loss probabilities before and after the liquefaction countermeasures are compared, and the effect of the countermeasures is considered from the viewpoint of the availability of the runway.