应用概率密度演化理论，分别研究了大型渡槽结构槽内水位变化以及水体与渡槽相互作用情况下的随机地震反应与抗震可靠度问题。分析结果表明，渡槽结构随机地震反应的概率分布呈现非规则分布，大型渡槽结构的随机地震反应与失效概率随着槽体内水位上升而显著增大。当槽体内水位一定时，考虑水体晃动对渡槽结构的影响，其地震反应却明显偏小，且抗震可靠度大幅提高。

The method of probability density evolution was employed to research the stochastic earthquake response and seismic reliability assessment for large-scale aqueduct structure under the condition of water level fluctuation and water-aqueduct interaction. Results show that the probability distribution of stochastic seismic responses of the aqueduct structure is irregular. The stochastic earthquake response and the failure probability of large-scale aqueduct structure increase obviously with the rising of water level.  However, with the water level unchanged, the seismic response is apparently smaller while the seismic reliability much higher considering the water sloshing effect on the aqueduct structure. 